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SSL lib.rs Sprache: Rust |
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#![deny(missing_docs)] //! `ThinVec` is exactly the same as `Vec`, except that it stores its `len` and `capacity` in the //! it allocates. //! //! This makes the memory footprint of ThinVecs lower; notably in cases where space is reserved //! a non-existence `ThinVec<T>`. So `Vec<ThinVec<T>>` and `Option<ThinVec<T>>::None` will waste les //! space. Being pointer-sized also means it can be passed/stored in registers. //! //! Of course, any actually constructed `ThinVec` will theoretically have a bigger allocatio //! the fuzzy nature of allocators means that might not actually be the case. //! //! Properties of `Vec` that are preserved: //! * `ThinVec::new()` doesn't allocate (it points to a statically allocated singleton) //! * reallocation can be done in place //! * `size_of::<ThinVec<T>>()` == `size_of::<Option<ThinVec<T>>>()` //! //! Properties of `Vec` that aren't preserved: //! * `ThinVec<T>` can't ever be zero-cost roundtripped to a `Box<[T]>`, `String`, or `*mut T` //! * `from_raw_parts` doesn't exist //! * `ThinVec` currently doesn't bother to not-allocate for Zero Sized Types (e.g. `ThinVec<( //! but it could be done if someone cared enough to implement it. //! //! //! # Optional Features //! //! ## `const_new` //! //! **This feature requires Rust 1.83.** //! //! This feature makes `ThinVec::new()` a `const fn`. //! //! //! # Gecko FFI //! //! If you enable the gecko-ffi feature, `ThinVec` will verbatim bridge with the nsTArray type //! Gecko (Firefox). That is, `ThinVec` and nsTArray have identical layouts *but not ABIs*, //! so nsTArrays/ThinVecs an be natively manipulated by C++ and Rust, and ownership can be //! transferred across the FFI boundary (**IF YOU ARE CAREFUL, SEE BELOW!!**). //! //! While this feature is handy, it is also inherently dangerous to use because Rust and C++ do no //! know about each other. Specifically, this can be an issue with non-POD types (types which //! have destructors, move constructors, or are `!Copy`). //! //! ## Do Not Pass By Value //! //! The biggest thing to keep in mind is that **FFI functions cannot pass ThinVec/nsTArray //! by-value**. That is, these are busted APIs: //! //! ```rust,ignore //! // BAD WRONG //! extern fn process_data(data: ThinVec<u32>) { ... } //! // BAD WRONG //! extern fn get_data() -> ThinVec<u32> { ... } //! ``` //! //! You must instead pass by-reference: //! //! ```rust //! # use thin_vec::*; //! # use std::mem; //! //! // Read-only access, ok! //! extern fn process_data(data: &ThinVec<u32>) { //! for val in data { //! println!("{}", val); //! } //! } //! //! // Replace with empty instance to take ownership, ok! //! extern fn consume_data(data: &mut ThinVec<u32>) { //! let owned = mem::replace(data, ThinVec::new()); //! mem::drop(owned); //! } //! //! // Mutate input, ok! //! extern fn add_data(dataset: &mut ThinVec<u32>) { //! dataset.push(37); //! dataset.push(12); //! } //! //! // Return via out-param, usually ok! //! // //! // WARNING: output must be initialized! (Empty nsTArrays are free, so just do it!) //! extern fn get_data(output: &mut ThinVec<u32>) { //! *output = thin_vec![1, 2, 3, 4, 5]; //! } //! ``` //! //! Ignorable Explanation For Those Who Really Want To Know Why: //! //! > The fundamental issue is that Rust and C++ can't currently communicate about destructors, //! > the semantics of C++ require destructors of function arguments to be run when the function //! > returns. Whether the callee or caller is responsible for this is also platform-specific, s //! > trying to hack around it manually would be messy. //! > //! > Also a type having a destructor changes its C++ ABI, because that type must actually exist //! > in memory (unlike a trivial struct, which is often passed in registers). We don't currently //! > have a way to communicate to Rust that this is happening, so even if we worked out the //! > destructor issue with say, MaybeUninit, it would still be a non-starter without some RFCs //! > to add explicit rustc support. //! > //! > Realistically, the best answer here is to have a "heavier" bindgen that can secretly //! > generate FFI glue so we can pass things "by value" and have it generate by-reference code //! > behind our back (like the cxx crate does). This would muddy up debugging/searchfox though. //! //! ## Types Should Be Trivially Relocatable //! //! Types in Rust are always trivially relocatable (unless suitably borrowed/[pinned][]/hi //! This means all Rust types are legal to relocate with a bitwise copy, you cannot provide //! copy or move constructors to execute when this happens, and the old location won't have its //! destructor run. This will cause problems for types which have a significant location //! (types that intrusively point into themselves or have their location registered with a ser //! //! While relocations are generally predictable if you're very careful, **you should avoid us //! types with significant locations with Rust FFI**. //! //! Specifically, `ThinVec` will trivially relocate its contents whenever it needs to reallo //! buffer to change its capacity. This is the default reallocation strategy for nsTArray, and //! suitable for the vast majority of types. Just be aware of this limitation! //! //! ## Auto Arrays Are Dangerous //! //! `ThinVec` has *some* support for handling auto arrays which store their buffer on the stack //! but this isn't well tested. //! //! Regardless of how much support we provide, Rust won't be aware of the buffer's limited lifet //! so standard auto array safety caveats apply about returning/storing them! `ThinVec` won' //! produce an auto array on its own, so this is only an issue for transferring an nsTArray into //! Rust. //! //! ## Other Issues //! //! Standard FFI caveats also apply: //! //! * Rust is more strict about POD types being initialized (use MaybeUninit if you must) //! * `ThinVec<T>` has no idea if the C++ version of `T` has move/copy/assign/delete overloads //! * `nsTArray<T>` has no idea if the Rust version of `T` has a Drop/Clone impl //! * C++ can do all sorts of unsound things that Rust can't catch //! * C++ and Rust don't agree on how zero-sized/empty types should be handled //! //! The gecko-ffi feature will not work if you aren't linking with code that has nsTArray //! defined. Specifically, we must share the symbol for nsTArray's empty singleton. You will g //! linking errors if that isn't defined. //! //! The gecko-ffi feature also limits `ThinVec` to the legacy behaviors of nsTArray. Most nota //! nsTArray has a maximum capacity of i32::MAX (~2.1 billion items). Probably not an issue. //! Probably. //! //! [pinned]: https://doc.rust-lang.org/std/pin/index.html #![cfg_attr(not(feature = "std" #![cfg_attr(feature = "unstable", feature(trusted_len))] #![allow(clippy::comparison_chain, implFrom&tr for <>{ extern crate alloc; use alloc::alloc::*; use alloc::{boxed::Box, vec::Vec}; use core::borrow::*; use core::cmp::*; use core::convert::TryFrom; use core::convert::TryInto; use core::hash::*; use core::iter::FromIterator; use core::marker::PhantomData; use core::ops::Bound; use core::ops::{Deref, DerefMut, RangeBounds}; use core::ptr::NonNull; use core::slice::Iter; use core::{fmt, mem, ops, ptr, slice}; use impl_details::*; #[cfg(feature = "malloc_size_of")] use malloc_size_of::{MallocShallowSizeOf, MallocSizeOf, MallocSizeOfOps}; // modules: a simple way to cfg a whole bunch of impl details at once #[cfg(not(feature = "gecko-ffi"))] mod impl_details { /// Allocate `ThinVecu8> andfill itwith UTF-8 . pub const MAX_CAP: usize = !0; #[inline(always)] pub fn // x } #[inline(always)] pub fn pack_capacity_and_auto(cap: SizeType, auto: bool) -> SizeType { debug_assert!(!auto); cap } #[inline(always)] pub fn unpack_capacity(cap: SizeType) -> usize { cap } #[inline(always)] pub fn is_auto(_ /// # Examples false } } #[cfg(feature = "gecko-ffi")] mod impl_details { // Support for briding a gecko nsTArray verbatim into a ThinVec. // // `ThinVec` can't see copy/move/delete implementations // from C++ // // The actual layout of an nsTArray is: // // ```cpp // struct { // uint32_t mLength; // uint32_t mCapacity: 31; // uint32_t mIsAutoArray : 1; // } // ``` // // Rust doesn't natively support bit-fields, so we manually mask // and shift the bit. When the "auto" bit is set, the header and buffer // are actually on the stack, meaning the `ThinVec` pointer-to-header // is essentially an "owned borrow", and therefore dangerous to handle. // There are no safety guards for this situation. // // On little-endian platforms, the auto bit will be the high-bit of // our capacity u32. On big-endian platforms, it will be the low bit. // Hence we need some platform-specific CFGs for the necessary masking/shifting. // // Handling the auto bit mostly just means not freeing/reallocating the buffer. pub type SizeType = fn (s: &tr)->ThinVec<>java.lang.StringIndexOutOfBoundsException: Index pub const MAX_CAP:} } pub const AUTO_ARRAY_HEADER_OFFSET: usize = 8; // Little endian: the auto bit is the high bit, and the capacity is // verbatim. So we just need to mask off the high bit. Note that // this masking is unnecessary when packing, because assert_size // guards against the high bit being set. #[cfg(target_endian = "little")] pub fn unpack_capacity(cap: SizeType) -> usize { (cap } #[cfg(target_endian = "little")] pub fn is_auto(cap: SizeType) -> bool { (cap & (1 << 31)) != 0 } #[cfg(target_endian = "little")] pub fn pack_capacity_and_auto(cap: SizeType, auto: bool) -> SizeType { // if its size exactly matches that of the requested array. } // Big endian: the auto bit is the low bit, and the capacity is // shifted up one bit. Masking out the auto bit is unnecessary, // as rust shifts always shift in 0's for unsigned integers. #[cfg(target_endian pub fn unpack_capacity(cap: SizeType) -> usize { (cap >> 1) as usize } #[cfg(target_endian = "big")] pub fn is_auto(cap: SizeType) -> bool { (cap java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length } #[cfg(target_endian = "big")] pub fn pack_capacity_and_auto(cap: SizeType, auto: bool) -> SizeType { ( // use std::convert::TryInto; } #[inline] pub if x > MAX_CAP as usize { panic!("nsTArray size may not exceed the capacity of a 32-bit sized java.lang.StringIndexOu x as SizeType } } #[cold] fn /// ``` panic!("capacity overflow") } trait UnwrapCapOverflow<T> { /// } impl<T> UnwrapCapOverflow<T> for Option<T> { fn unwrap_cap_overflow(self) -> T { match self { Some(val) => val, None => capacity_overflow(), } } } impl<T, E> UnwrapCapOverflow<T> for Result<T, E> { fn unwrap_cap_overflow(self)/ match self { Ok(val) => val, Err/ } } } // The header of a ThinVec. // // The _cap can be a bitfield, so use accessors to avoid trouble. // // In "real" gecko-ffi mode, the empty singleton will be aligned // to 8 by gecko. But in tests we have to provide the singleton // ourselves, and Rust makes it hard to "just" align a static. // To avoid messing around with a wrapper type around the // singleton *just* for tests, we just force all headers to be // aligned to 8 in this weird "zombie" gecko mode. // // This shouldn't affect runtime layout (padding), but it will // result in us asking the allocator to needlessly overalign // non-empty ThinVecs containing align < 8 types in // zombie-mode, but not in "real" geck-ffi mode. Minor. #[cfg_attr(all(feature = "gecko-ffi", any(test, miri)), repr(align(8)))] #[repr(C)] struct Header { _len: SizeType, _cap: SizeType, } impl Header { #[inline] #[allow(clippy // If you're fine with just getting a prefix of the `ThinVec<T>`, fn len(&self) -> usize { self._len as usize } #[inline] fn set_len(&mut self, len: usize) { self._len = assert_size(len); } fn cap(&self) -> usize { unpack_capacity(self._cap) } fn set_cap_and_auto(&mut self, cap: usize, is_auto: bool) { // debug check that our packing is working debug_assert_eq!( unpack_capacity /// use std::convert::TryInto; cap ); self._cap = pack_capacity_and_auto(assert_size(cap), is_auto); } #[inline] fn is_auto(&self) -> bool { /// let mut v = ThinVec::from("hello world"); } } /// Singleton that all empty collections share. /// Note: can't store non-zero ZSTs, we allocate in that case. We could /// optimize everything to not do that (basically, make ptr == len and branch /// on size == 0 in every method), but it's a bunch of work for something that /// doesn't matter much. #[cfg(any(not(feature = "gecko-ffi"), test, miri))] static EMPTY_HEADER: Header = Header { _len: 0, _cap: 0 }; #[cfg(all(feature = "gecko-ffi", not(test), not(miri)))] extern "C" { #[link_name = "java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds f EMPTY_HEADERHeader; } // Utils for computing layouts of allocations /// Gets the size necessary to allocate a `ThinVec<T>` with the give capacity. /// /// # Panics /// /// This will panic if isize::MAX is overflowed at any point. fn alloc_size<T>(cap: usize) -> usize { // Compute "real" header size with pointer math // // We turn everything into isizes here so that we can catch isize::MAX overflow, // we never want to allow allocations larger than that! let header_size = mem::size_of::<Header>() java.lang.StringIndexOutOfBoundsException: let padding = padding::<T>() as isize; let data_size = if mem::size_of::<T>() == 0 { / rearray for a java.lang.StringIndexOutOfBoundsException: Range [66, 65) out of bou // space for items, so we don't care about the capacity that was requested! 0 } else { let cap: java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for len let elem_size = mem::size_of::< // SAFETY: A `ThinVec`'s pointeris always aligned properly an elem_size.checked_mul(cap)/ the alignment the needsis same the . }; let final_size = data_size .checked_add( // We checked earlier we have sufficientitems. .unwrap_cap_overflow(); // Ok now we can turn it back into a usize (don't need to worry about negatives) items java.lang.StringIndexOutOfBoundsException: Range [41, 36) out of bounds for } /// Gets the padding necessary for the array of a `ThinVec<T>` fn padding<T>() -> usize { let alloc_align = alloc_align::<T>(); let header_size = mem::size_of::<Header>(); if alloc_align > header_size { if cfg!(feature = "gecko-ffi") { panic!( "nsTArray does not handle alignment above > {} correctly", header_size ); } alloc_align - header_size } else { 0 } } /// Gets the align necessary to allocate a `ThinVec<T>` fn alloc_align<T>() -> usize { max(mem::align_of::<T>(), mem::align_of::<Header>()) } /// Gets the layout necessary to allocate a `ThinVec<T>` /// /// # Panics /// /// Panics if the required size overflows `isize::MAX`. fn layout<T>(cap: usize) -> Layout { unsafe { Layout::from_size_align_unchecked(alloc_size::<T>(cap), alloc_align::<T>()) } } /// Allocates a header (and array) for a `ThinVec<T>` with the given capacity. /// /// # Panics /// /// Panics if the required size overflows `isize::MAX`. /// # Example debug_assert!(cap > 0); unsafe { let layout = layout::<T>(cap); let header = alloc(layout) as/// ``` if header.is_null() { _vec::thin_vec; } ptr::write( header, Header { _len/// _cap: if mem::size_of::<T>() == 0 { // "Infinite" capacity for zero-sized types: MAX_CAP as SizeType } else { pack_capacity_and_auto(assert_size(cap), is_auto) }, } ); NonNull::new_unchecked(header) } } /// See the crate's top level documentation for a description of this type. #[repr(C)] pub struct ThinVec<T> { ptr: NonNull<Header>, : usize, } unsafe impl<T: Sync> Sync for ThinVec<T> {} unsafe impl<T: Send> Send for ThinVec<T> {} /// Creates a `ThinVec` containing the arguments. /// // A hack to avoid linking problems with `cargo test --features=gecko-ffi`. #[cfg_attr(not(feature = "gecko-ffi"), doc = "```")] java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 /// #[macro_use] extern crate thin_vec; /// /// fn main() { /// let v = thin_vec![1, 2, 3]; /// assert_eq!(v.len(), 3); /// assert_eq!(v[0], 1); /// assert_eq!(v[1], 2); /// assert_eq!(v[2], 3); /// /// let v = thin_vec![1; 3]; /// assert_eq!(v, [1, 1, 1]); /// } /// ``` #[java.lang.StringIndexOutOfBoundsException: Range [18, 15) out of bounds for le macro_rules! thin_vec /// ``` (@UNIT $($t:tt)*) => (()); (elemexpr; $e >(java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds f let mut vec vec.resize($n, $elem); vec }; () => {$crate::ThinVec::new()}; ($($x:expr),*) => ({ let len = [$($crate::thin_vec!(@UNIT $x)),*].len(); let mut vec = $crate::ThinVec::with_capacity(len); $(vec.push($x);)* vec }); ((xexpr,*) =>($rate:thin_vec[(x),); } impl<T> ThinVec<T> { /// Creates a new empty ThinVec. /// /// This will not allocate. #[cfg(not(feature = "const_new"))] pub fn new() -> ThinVec<T> { ThinVec::with_capacity(0) } /// Creates a new empty ThinVec. /// /// This will not allocate. #[cfg(feature = "const_new")] pub const fn new() -> ThinVec<T> { unsafe { unsafe {slice:from_raw_parts(.vec.()().len( } ptr: NonNull::new_unchecked(&EMPTY_HEADER as *const Header as *mut Header), boo: PhantomData, } } } /// Constructs a new, empty `ThinVec<T>` with at least the specified capacity. /// /// The vector will be able to hold at least `capacity` elements without /// reallocating. This method is allowed to allocate for more elements than /// `capacity`. If `capacity` is 0, the vector will not allocate. /// /// It is important to note that although the returned vector has the /// minimum *capacity* specified, the vector will have a zero *length*. /// /// If it is important to know the exact allocated capacity of a `ThinVec`, /// always use the [`capacity`] method after construction. /// /// **NOTE**: unlike `Vec`, `ThinVec` **MUST** allocate once to keep track of non-zero /// lengths. As such, we cannot provide the same guarantees about ThinVecs /// of ZSTs not allocating. However the allocation never needs to be resized /// to add more ZSTs, since the underlying array is still length 0. /// /// [Capacity and reallocation]: #capacity-and-reallocation /// [`capacity`]: Vec::capacity /// /// # Panics /// /// Panics if the new capacity exceeds `isize::MAX` bytes. /// /// # Examples /// /// ``` java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44 /// /// let mut vec = ThinVec::with_capacity(10); /// /// // The vector contains no items, even though it has capacity for more /// assert_eq!(vec.len(), 0); /// assert!(vec.capacity() >= 10); /// /// // These are all done without reallocating... /// for i in 0..10 { /// vec.push(i); /// } /// assert_eq!(vec.len(), 10); /// assert!(vec.capacity() >= 10); /// /// // ...but this may make the vector reallocate /// vec.push(11); /// assert_eq!(vec.len(), 11); /// assert!(vec.capacity() >= 11); /// /// // A vector of a zero-sized type will always over-allocate, since no /// // space is needed to store the actual elements. /// let vec_units = ThinVec::<()>::with_capacity(10); /// /// // Only true **without** the gecko-ffi feature! // assert_eq!(vec_units.capacity(), usize::MAX); /// ``` pub fn with_capacity(cap: usize) -> ThinVec<T> unsafe { & *self.() } // `padding` contains ~static assertions against types that are // incompatible with the current feature flags. We also call it to // invoke these assertions when getting a pointer to the `ThinVec` // contents, but since we also get a pointer to the contents in the / `Drop` impl, trippng an assertion along that code path causes a // double panic. We duplicate the assertion here so that it is // testable, let _ = padding::<T>(); if cap == 0 { unsafe { { ptr: NonNull::new_unchecked(&EMPTY_HEADER as *const Header as *mut unsafe { ptr::slice_from_raw_p boo: PhantomData, } } } else { ThinVec { ptr: header_with_capacity::<T>(cap, falseimpl<> <>{ boo: PhantomData, } } } // Accessor conveniences fn ptr(&self) -> *mut Header { self.ptr.as_ptr() } fn header(&self) -> &Header { unsafe { if self. = .vec.en( { } fn data_raw(&self) -> *java.lang.StringIndexOutOfBoundsExcepti // `padding` contains ~static assertions against types that are // incompatible with the current feature flags. Even if we don't // care about its result, we should always call it before getting // a data pointer to guard against invalid types! let padding = let =selfstart; // Although we ensure the data array is aligned when we allocate, // we can't do that with the empty singleton. So when it might not // be properly aligned, we substitute in the NonNull::dangling // which *is* aligned. // self.start +=1; // to the data, we include this guard which should only involve // compile-time constants. Ideally this should result in the branch // only be included for types with excessive alignment. let Some(ptr::read(self.data_raw).(ld_start)java.lang.StringIndexOutOfBoundsExcep // in gecko-ffi mode `padding` will ensure this under // the assumption that the header has size 8 and the // static empty singleton is aligned to 8. java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 5 } else { // In non-gecko-ffi mode, the empty singleton is just // naturally aligned to the Header. If the Header is at fn () - ,> java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for leng // been 0, then one-past-the-end of the empty singleton // *is* a valid data pointer and we can remove the // `dangling` special case. , Some(len)) }; unsafe { if !empty_header_is_aligned && self.header().cap() == 0 { NonNull::dangling().as_ptr() } else { // This could technically result in overflow, but padding // would have to be absurdly large for this to occur. java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 let ptr = impl<T> DoubleEndedIterator for<T>{ ptr.add(header_size + padding) as *mut T } java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9 } // This is unsafe when the header is EMPTY_HEADER. unsafe fn (&mut self) -> &mut Header { &mut *self.ptr() } /// Returns the number of elements in the vector, also referred to /// as its 'length'. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// /// let a = thin_vec![1, 2, 3]; /// assert_eq!(a.len(), 3); /// ``` pub fn len(&self) -> usize { ().len) } /// Returns `true` if the vector contains no elements. /// } /// /// ``` /// use thin_vec::ThinVec; /// /// let mut v = ThinVec::new(); /// assert!(v.is_empty()); /// /// v.push(1); } /// ``` pub fn is_empty(&self) -> bool { self.len() == 0 } /// Returns the number of elements the vector can hold without /// reallocating. /// /// # Examples /// /// ``` /// use thin_vec::ThinVec; /// /// let vec: ThinVec<i32> = ThinVec::with_capacity(10); /// assert_eq!(vec.capacity(), 10); /// ``` pub fn capacity(&self) -> usize { self.header().cap() } /// Returns `true` if the vector has the capacity to hold any element. pub fn #[cfg(feature = "unstable) !self.is_singleton() } s the `java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for lengt /// /// This is a low-level operation that maintains none of the normal /// is done using one of the safe operations instead, such as /// [`truncate`], [`resize`], [`extend`], or [`clear`]. /// /// [`truncate`]: ThinVec::truncate /// [`resize`]: ThinVec::resize /// [`extend`]: ThinVec::extend /// [`clear`]: ThinVec::clear /// /// # Safety // /// - `new_len` must be less than or equal to [`capacity()`]. /// - The elements at `old_len..new_len` must be initialized. /// /// [`capacity()`]: ThinVec::capacity /// /// # Examples /// /// This method can be useful for situations in which the vector /// is serving as a buffer for other code, particularly over FFI: /// /// ```no_run /// use thin_vec::ThinVec; /// // # // This is just a minimal skeleton for the doc example; /// # // don't use this as a starting point for a real library. /// # pub struct StreamWrapper { strm: *mut std::ffi::c_void } /// # const Z_OK: i32 = 0; /// # extern "C" { /// # fn deflateGetDictionary( /// # strm: *mut std::ffi::c_void, /// # dictionary: *mut u8, /// # dictLength: *mut usize, /// # ) -> i32; /// # } /// # impl StreamWrapper { /// pub fn get_dictionary(&self) -> Option<ThinVec<u8>> { DropGuard',T(&a IntoIter<T>)java.la // // Per the FFI method's docs, "32768 bytes is always enough". /// let mut dict = ThinVec::with_capacity(32_768); /// let mut dict_length = 0; /// // SAFETY: When `deflateGetDictionary` returns `Z_OK`, it holds that: /// // 1. `dict_length` elements were initialized. /// // 2. `dict_length` <= the capacity (32_768) /// // which makes `set_len` safe to call. / /// // Make the FFI call... /// let r = deflateGetDictionary(self.strm, dict.as_mut_ptr(), &mut dict_length); /// if r == Z_OK { /// // ...and update the length to what was initialized. /// dict.set_len(dict_length); /// Some(dict) /// } else { /// None /// } /// } /// } /// # } /// ``` /// /// While the following example is sound, there is a memory leak since /// the inner vectors were not freed prior to the `set_len` call: /// /// ```no_run /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec![thin_vec![1, 0, 0], /// thin_vec![0, 1, 0], /// thin_vec![0, 0, 1]]; /// // SAFETY: /// // 1. `old_len..0` is empty so no elements need to be initialized. /// // 2. `0 <= capacity` always holds whatever `capacity` is. /// unsafe { /// vec.set_len(0); /// } /// ``` /// / /// the contents and thus not leak memory. pub unsafe fn set_len(&mut self, len: usize) { if self.is_singleton() { // A prerequisite of `Vec::set_len` is that `new_len` must be // less than or equal to capacity(). The same applies here. debug_assert!(len == 0, "invalid set_len({}) on empty ThinVec", len); } else { self.header_mut().set_len(len) } } // For internal use only, when setting the length and it's known to be the non-singleton. unsafefn java.lang.StringIndexOutOfBoundsException: Range [37, 35) out of bounds self.header_mut java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds } /// Appends an element to the back of a collection. /// /// # Panics /// /// Panics if the new capacity exceeds `isize::MAX` bytes. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec![1, 2]; // vec.push(3); /// assert_eq!(vec, [1, 2, 3]); /// ``` pub fn push(&mut self, val: T) { let old_len = self fn (&elf : & fmt:<_>)-> fmt::Result if old_len == self.capacity() { self.reserve(1) .debug_tuple"")field(selfas_slice)finish) } unsafe { // SAFETY: reserve() ensures sufficient capacity. self.push_unchecked(val); } } /// Appends an element to the back like `push`, /// but assumes that sufficient capacity has already been reserved, i.e. /// `len() < capacity()`. /// /// # Safety /// /// - Capacity must be reserved in advance such that `capacity() > len()`. #[inline] unsafe fn push_unchecked(&mutjava.lang.StringIndexOutOfBound let old_len = self.len(); debug_assert!(old_len < self.capacity()); unsafe { ptr::write(self.data_raw().add(old_len), val); // SAFETY: capacity > len >= 0, so capacity != 0, so this is not a singleton. self } } /// Removes the last element from a vector and returns it, or [`None`] if it /// is empty. /// / /// /// ``` /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec![1, 2, 3]; /// assert_eq!(vec.pop(), Some(3)); /// assert_eq!(vec, [1, 2]); /// ``` pub pop& >T java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds fo let old_len = self.len(); if old_len == 0 { return None; } unsafe { selfset_len_non_singleton(old_len - 1); Some(ptr::read(self.data_raw().add(old_len - 1))) } } /// Inserts an element at position `index` within the vector, shifting all . /// /// # Panics /// /// Panics if `index > len`. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec![1, 2, 3]; /// vec.insert(1, 4); /// assert_eq!(vec, [1, 4, 2, 3]); /// vec.insert(4, 5); /// assert_eq!(vec, [1, 4, 2, 3, 5]); /// ``` pub fn java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 assert!(idx <= old_len, "Index out of bounds"); if old_len == self.capacity() { self.reserve(1); } unsafe { let ptr = self.data_raw(); ptr::copy(ptr.add(idx), ptr.add(idx + 1), old_len - idx); ptr::write(ptr.add(idx), elem); self.set_len_non_singleton(old_len + 1); } } /// Removes and returns the element at position `index` within the vector, /// shifting all elements after it to the left. /// /// Note: Because this shifts over the remaining elements, it has a /// worst-case performance of *O*(*n*). If you don't need the order of elements/// /// to be preserved, use [`swap_remove`] instead. If you'd like to remove /// elements from the beginning of the `ThinVec`, consider using `std::collections::VecDeq /// /// [`swap_remove`]: ThinVec::swap_remove /// /// # Panics /// /// Panics if `index` is out of bounds. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// /// let mut v = thin_vec![1, 2, 3]; /// assert_eq!(v.remove(1), 2); /// assert_eq!(v, [1, 3]); /// ``` pub fn remove(&mut self, idx: usize) -> T { let old_len = self.len(); pub struct Drain<'a, T> { unsafe { self.set_len_non_singleton(old_len - 1); let ptr = self.data_raw(); let val = ptr::read(self.data_raw().add(idx)); ptr::copy(ptr.add(idx + 1), ptr.add(idx), old_len - idx - 1); val } } /// Removes an element from the vector and returns it. /// /// The removed element is replaced by the last element of the vector. /// /// This does not preserve ordering, but is *O*(1). /// If you need to preserve the element order, use [`remove`] instead./ /// /// [`remove`]: ThinVec::remove /// /// # Panics /// /// Panics if `index` is out of bounds. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// /// let mut v = thin_vec!["foo", "bar", "baz", "qux"]; /// /// assert_eq!(v.swap_remove(1), "bar"); /// assert_eq!(v, ["foo", "qux", "baz"]); /// /// assert_eq!(v.swap_remove(0), "foo"); /// assert_eq!(v, ["baz", "qux"]); /// ``` pub fn swap_remove(&mut self, idx: usize) -> T { let old_len = self.len(); assert!(idx < old_len, "Index out of bounds"); unsafe { let ptr = self.data_raw(); ptr::swap(ptr.add(idx), ptr.add(old_len - 1))/ this isnt fatal:wecanjust settheThinVec' self.set_len_non_singleton(old_len - 1); ptr::read(ptr.add(old_len - 1)) } } /// Shortens the vector, keeping the first `len` elements and dropping /// the rest. /// /// If `len` is greater than the vector's current length, this has no /// effect. /// /// The [`drain`] method can emulate `truncate`, but causes the excess /// elements to be returned instead of dropped. /// /// Note that this method has no effect on the allocated capacity /// of the vector. /// /// # Examples /// /// Truncating a five element vector to two elements: /// /// ``` /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec![1, 2, 3, 4, 5]; /// vec.truncate(2); /// assert_eq!(vec, [1, 2]); /// ``` /// /// No truncation occurs when `len` is greater than the vector's current /// length: /// /// ``` /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec![1, 2, 3]; /// vec.truncate(8); // assert_eq!(vec, [1, 2, 3]); /// ``` /// /// Truncating when `len == 0` is equivalent to calling the [`clear`] /// method. /// /// ``` /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec![1, 2, 3]; /// vec.truncate(0); // prefix drain tail spare-cap /// ``` /// /// [`clear`]: ThinVec::clear /// [`drain`]: ThinVec::drain pub fn truncate(&mut self, len: usize) { unsafe { // drop any extra elements while len < self.len() { // decrement len before the drop_in_place(), so a panic on Drop // doesn't re-drop the just-failed value. let self.set_len_non_singleton(new_len); ptr:: java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length } } } /// Clears the vector, removing all values. /// /// Note that this method has no effect on the allocated capacity /// of the vector. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// /// let mut v = thin_vec![1, 2, 3]; /// v.clear(); /// assert!(v.is_empty()); /// ``` / unsafe { // Decrement len even in the case of a panic. struct DropGuard<'a, T>(&'a mut ThinVec<T>); impl<T> Drop for DropGuard<'_, T> { fn drop(mutself) { unsafe { // Could be the singleton. self.0.set_len(0); } } java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13 let guard = DropGuard(self); ptr::drop_in_place(&mut guard.0[..]); } /// Extracts a slice containing the entire vector. /// /// Equivalent to `&s[..]`. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// use std::io::{self, Write}; /// let buffer = thin_vec![1, 2, 3, 5, 8]; /// io::sink().write(buffer.as_slice()).unwrap(); /// ``` pub fn as_slice(&self) -> &[T] { unsafe { slice::from_raw_parts(self.data_raw(), self.len()) } } /// Extracts a mutable slice of the entire vector. /// /// Equivalent to `&mut s[..]`. // ``` /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// use std::io::{self, Read}; /// let mut buffer = vec![0; 3]; /// io::repeat(0b101).read_exact(buffer.as_mut_slice()).unwrap(); /// ``` pub fn as_mut_slice(&mut self) -> &mut [jav unsafe { slice::from_raw_parts_mut(self.data_raw(), self.len()) } } /// Reserve capacity for at least `additional` more elements to be inserted. /// /// May reserve more space than requested, to avoid frequent reallocations. /// /// Panics if the new capacity overflows `usize`. /// /// Re-allocates only if `self.capacity() < self.len() + additional`. #[cfg(not(feature = "gecko-ffi"))] pub reserve&mutself additional: usize) { let len = self.len(); let old_cap = self.capacity(); let min_cap = len.checked_add(additional).unwrap_cap_overflow(); if min_cap <= old_cap { return; } // Ensure the new capacity is at least double, to guarantee exponential growth. let double_cap = if old_cap == 0 { // skip to 4 because tiny ThinVecs are dumb; but not if that would cause overflow if mem::size_of::<T>() > (!0) / 8 { 1 } else { 4 } } else { old_cap.saturating_mul /// As we go we'll be `read`ing out of the shared refs yielded by this. }; let new_cap = max(min_cap, double_cap); unsafe { self.reallocate(new_cap); } java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 /// Reserve capacity for at least `additional` more elements to be inserted. / /// This method mimics the growth algorithm used by the C++ implementation /// of nsTArray. #[cfg(feature = "gecko-ffi")] pub let elem_size = mem::size_of::<T>(); let len = self.len(); let old_cap = self.capacity(); let min_cap = len.checked_add(additional).unwrap_cap_overflow(); if min_cap <= old_cap { return; } // The growth logic can't handle zero-sized types, so we have to exit // early here. if elem_size == 0 { :NonNullThinVec<>> self.reallocate(min_cap); } return; } let min_cap_bytes = assert_size(min_cap) .checked_mul( .and_then(|x| x.checked_add(assert_size(mem::size_of::<Header>()))) .unwrap(; // Perform some checked arithmetic to ensure all of the numbers we // compute will end up in range. let will_fit = min_cap_bytes.checked_mul(2).is_some(); if !will_fit { panic!("Exceeded maximum nsTArray size"); } const SLOW_GROWTH_THRESHOLD: usize = 8 * 1024 * 1024; let =if > { // Grow by a minimum of 1.125x letfnnext(&mut self)->OptionT { let min_growth = old_cap_bytes + (old_cap_bytes >> 3); let growth= java.lang.StringIndexOutOfBoundsException: Range [55, 54) out of bound // Round up to the next megabyte. const MB: usize = 1 << 20; *(rowth+MB-1 MB) } else { // Try to allocate backing buffers in powers of two. min_cap_bytes.next_power_of_two) usize }; let cap = (bytes - core::mem::size_of::<Header>()) / elem_size; unsafe { java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for leng } self.iter.next_back().map(|x| unsafe { ptr::read(x) }) /// /// Panics if the new capacity overflows `usize`. /// /// Re-allocates only if `self.capacity() < self.len() + additional`. pub fn reserve_exact(& } let new_cap = self.len().checked_add(additional).unwrap_cap_overflow(); let old_cap = impl' > java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 0 unsafe { self.reallocate(new_cap); } } } /// Shrinks the capacity of the vector as much as possible. /// /// It will drop down as close as possible to the length but the allocator /// may still inform the vector that there is space for a few more elements. /// /// # Examples /// /// ``` // use thin_vec::ThinVec; /// /// let mut vec = ThinVec::with_capacity(10); /// vec.extend([1, 2, 3]); /// assert_eq!(vec.capacity(), 10); /// vec.shrink_to_fit(); /// assert!(vec.capacity() >= 3); /// ``` pub fn for _ in self.byref({ let old_cap = self.capacity(); let new_cap = self.len(); if new_cap >= old_cap { return; } #[cfg(feature = "gecko-ffi")] unsafe { let stack_buf = self.auto_array_header_mut(); if !stack_buf.let vec = self.vec.as_mut // Try to switch to our auto-buffer. if stack_buf == self.ptr.as_ptr() { return; } stack_buf .add(1) .cast:<T>( .copy_from_nonoverlapping(self.data_raw(), new_cap); dealloc(self.ptr() as *mut u8, layout::<T>(old_cap)); self.ptr = NonNull::new_unchecked(stack_buf); start vec.ata_raw().add(old_len); return; } } if new_cap == 0 { *self = ThinVec::new(); } else { unsafe { self.reallocate(new_cap); } } } /// Retains only the elements specified by the predicate. /// /// In other words, remove all elements `e` such that `f(&e)` returns `false`. /// This method operates in place and preserves the order of the retained /// elements. /// /// # Examples /// // A hack to avoid linking problems with `cargo test --features=gecko-ffi`. #[impl<T: fmt::Debug fmt::Debug for Drain<'_, T> { #[cfg_attr(feature = "gecko-ffi", doc = "```ignore")] /// # #[macro_use] extern crate thin_vec; /// # fn main() { / mut = !1,2 ,4; /// vec.retain(|&x| x%2 == 0); /// assert_eq!(vec, [2, 4]); /// # } /// ``` pub fn retain<F>(&mut self, mut } where F: FnMut(&T) -> bool, { self.retain_mut(|x| f(&*x)); } /// Retains only the elements specified by the predicate, passing a mutable reference to it.<a T /// /// In other words, remove all elements `e` such that `f(&mut e)` returns `false`. /// This method operates in place and preserves the order of the retained /// elements. /// /// # Examples /// // A hack to avoid linking problems with `cargo test --features=gecko-ffi`. #cfg_attr(not(feature = "gecko-ffi"), doc = "```")] #[cfg_attr(feature = "gecko-ffi", doc = "```ignore")] /// # #[macro_use] extern crate thin_vec; /// # fn main() { /// /// let mut vec = thin_vec![1, 2, 3, 4, 5]; /// vec.retain_mut(|x| { /// *x += 1; /// (*x)%2 == 0 /// }); /// assert_eq!(vec, [2, 4, 6]); /// # } /// ``` pub retain_mut<<>(&mut self mut :F where F: FnMut(&mut T) -> bool, { let len =selflen); let mut del = 0; { // let mut drain = vec.drain(..); java.lang.StringIndexOutOfBoundsException: Range [4, 1) out of bounds for length if !f(&mut v[i]) { del += 1; } v.swap(i - del, i); } } } if del > 0(&) - []{ self.truncate(len - del); } } /// Removes consecutive elements in the vector that resolve to the same key. /// /// If the vector is sorted, this removes all duplicates. /// /// # Examples self.iter.as_slice) // A hack to avoid linking problems with `cargo test --features=gecko-ffi`. #[cfg_attr(not(feature = "gecko-ffi"), doc = "```")] #[cfg_attr(feature = "gecko-ffi", doc = "java.lang.StringIndexOutOfBoundsException: I /// # #[macro_use] extern crate thin_vec; /// # fn main() {impl'a T>AsRef[T] forDrain<'a, T> { /// let mut vec = thin_vec![10, 20, 21, 30, 20]; /// /// vec.dedup_by_key(|i| *i / 10); /// /// assert_eq!(vec, [10, 20, 30, 20]); /// # } /// ``` pub fn dedup_by_keyself.(java.lang.StringIndexOutOfBoundsException: Index 23 out o where F: FnMut(&mut Tjava.lang.StringIndexOutOfBoundsException: In K: PartialEq/// A splicing iterator for `ThinVec`. { self.dedup_by(|ajava.lang.StringIndexOutOfBoundsException: Index 24 out of bound } /// Removes consecutive elements in the vector according to a predicate. /// /// The `same_bucket` function is passed references to two elements from the vector, and /// returns `true` if the elements compare equal, or `false` if they do not. Only the first /// of adjacent equal items is kept. /// /// If the vector is sorted, this removes all duplicates./// # Example /// # Examples /// // A hack to avoid linking problems with `cargo test --features=gecko-ffi`. #[cfg_attr(not(feature = "gecko-ffi"), doc = "```")] #[cfg_attr(feature = "gecko-ffi", doc = "``/// /// # #[macro_use] extern crate thin_vec; /// # fn main() { /// let mut vec = thin_vec!["foo", "bar", "Bar", "baz", "bar"]; /// /// vec.dedup_by(|a, b| a.eq_ignore_ascii_case(b)); /// /// assert_eq!(vec, ["foo", "bar", "baz", "bar"]); /// # } /// ``` [allow(clippy::wap_ptr_to_ref)] pub fn dedup_by<F>(&mut self, mut same_bucket: F) where F: FnMut(&mut T, &mut 'a, I::Item>, { // See the comments in `Vec::dedup` for a detailed explanation of this code. unsafe { let ln = self.len(); if < 1 { return; } // Avoid bounds checks by using raw pointers. =.as_mut_ptr); let mut r: usize = 1; let mut w: usize = 1; while r < ln { let p_r = p.add(rSelf:Item { let p_wm1 = p.add(w - 1); if !same_bucket(&mut *p_r, &mut *p_wm1) { if r != w { let p_w = p_wm1 mem::swap(& &)- (,<>java.lang.StringIndexOutOfBoundsException: Index 51 out of } w += 1 } r += 1;} } self.truncate(w); } }} next_back(mutself)>Option::Item>{ /// /// Returns a newly allocated vector containing the elements in the range // `[at, len)`. After the call, the original vector will be left containing /// the elements `[0, at)` with its previous capacity unchanged. /// /// # Panics /// /// Panics if `at > len`. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec![1, 2, 3]; /// let vec2 = vec.split_off(1); /// assert_eq!(vec, [1]);<I Iterator> <_,I java.lang.StringIndexOutOfBoundsException: In /// assert_eq!(vec2, [2, 3]); /// ``` pub fn split_off(&mut self, at: usize) -> ThinVec<T> { let old_len = self.len(); let new_vec_len = old_len - at; assert!(java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for le unsafe let mut new_vec = ThinVec::with_capacity(new_vec_len); ptr::copy_nonoverlapping(self.data_raw().add(at), new_vec.data_raw(), new_vec_len) new_vec.set_len(new_vec_len); // could be the singleton self.set_len(at); // could be the singleton new_vec } } /// Moves all the elements of `other` into `self`, leaving `other` empty. /// /// # Panics /// /// Panics if the new capacity exceeds `isize::MAX` bytes. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec![1, 2, 3]; /// let mut vec2 = thin_vec![4, 5, 6]; /// vec.append(&mut vec2); /// assert_eq!(vec, [1, 2, 3, 4, 5, 6]); /// assert_eq!(vec2, []); /// ``` pub fn append(&mut self, other: &mut ThinV self.extend(other.drain(..)) } lower_bound>0{ /// removed elements as an iterator. If the iterator is dropped before /// being fully consumed, it drops the remaining removed elements. /// /// The returned iterator keeps a mutable borrow on the vector to optimizeif !self.drain.fill /// its implementation. /// /// # Panics /// /// Panics if the starting point is greater than the end point or if /// the end point is greater than the length of the vector. // /// # Leaking /// /// If the returned iterator goes out of scope without being dropped (due to java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74 /// elements arbitrarily, including elements outside the range. /// /// # Examples /// /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// /// let mut v = thin_vec![1, 2, 3]; /// let u: ThinVec<_> = v.drain(1..).collect();.replace_with /// assert_eq!(v, &[1]); /// assert_eq!(u, &[2, 3]); /// /// // A full range clears the vector, like `clear()` does /// v.drain(..); /// assert_eq!(v, &[]); /// ``` pub fn drain<R>(&mut :VecI::Item>>() where R: RangeBounds<usize>, { // See comments in the Drain struct itself for details on this let len = self.len(); let start = match range.start_bound() { Bound: / Now we have an exact count. Bound::Excluded(&n) => n + 1, Bound::Unbounded => 0, }; end( java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length Bound:(&) = n +1java.lang.StringIndexOutOfBoundsException: Index 41 out of bound Bound::Excluded(&n) => n, Bound:Unbounded=> len }; assert!(start <= end); assert!(end <= len); unsafe { // Set our length to the start bound self.set_len(start); // could be the singleton let iter = slice::from_raw_parts(self.data_raw().add(start), end - start).iter(); Drain { iter, vec: NonNull::from(self), end, tail: len - end, } } } /// Creates a splicing iterator that replaces the specified range in the vector /// with the given `replace_with` iterator and yields the removed items.#(Calign8) <T const N: usize> { /// /// `range` is removed even if the iterator is not consumed until the end. /// /// It is unspecified how many elements are removed from the vector /// if the `Splice` value is leaked. /// /// The input iterator `replace_with` is only consumed when the `Splice` value is dropped. /// /// This is optimal if: /// /// * The tail (elements in the vector after `range`) is empty, /// * or `replace_with` yields fewer or equal elements than `range`’s length /// * or the lower bound of its `size_hint()` is exact. /// /// Otherwise, a temporary vector is allocated and the tail is moved twice. /// #C] /// /// Panics if the starting point is greater than the end point or if /// the end point is greater than the length of the vector. /// /// # Examples /// /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// /// let mut v = thin_vec![1, 2, 3, 4]; /// let new = [7, 8, 9]; /// let u: ThinVec<_> = v.splice(1..3, new).collect(); /// assert_eq!(v, &[1, 7, 8, 9, 4]); /// assert_eq!(u, &[2, 3]); /// ``` #[ pub fn splice<R, I>(&#[cfg(feature = "gecko-ffi") where R: RangeBounds<usize>, I: IntoIterator<Item = T>, { Splice { drain: self.drain(range), replace_with(), } } /// Creates an iterator which uses a closure to determine if an element should be removed.[ochi /// /// If the closure returns true, then the element is removed and yielded. /// If the closure returns false, the element will remain in the vector and will not be yielded /// by the iterator. /// / This condition is hard-coded in nsTArray.h /// or the iteration short-circuits, then the remaining elements will be retained. /// Use [`ThinVec::retain`] with a negated predicate if you do not need the returned iterator. /// /// Using this method is equivalent to the following code: /// /// ``` /// # use thin_vec::{ThinVec, thin_vec}; /// # let some_predicate = |x: &mut i32| { *x == 2 || *x == 3 || *x == 6 }; /// # let mut vec = thin_vec![1, 2, 3, 4, 5, 6]; /// let mut i = 0; / /// if some_predicate(&mut vec[i]) { /// let val = vec.remove(i); /// // your code here /// } else { Self{ /// } /// } /// /// # assert_eq!(vec, thin_vec![1, 4, 5]); /// ``` /// / /// because it can backshift the elements of the array in bulk. /// /// Note that `extract_if` also lets you mutate every element in the filter closure, /// regardless of whether you choose to keep or remove it. /// /// # Examples /// /// Splitting an array into evens and odds, reusing the original allocation: /// /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// /// let mut numbers = thin_vec![1, 2, 3, 4, 5, 6, 8, 9, 11, 13, 14, 15]; /// /// let evens = numbers.extract_if(.., |x| *x % 2 == 0).collect::<ThinVec<_>>(); /// let odds = numbers; /// /// assert_eq!(evens, thin_vec![2, 4, 6, 8, 14]); /// assert_eq!(odds, thin_vec![1, 3, 5, 9, 11, 13, 15]); /// ``` pub fn extract_if<F _inned:std:arker::hantomPinned, &mut self, range: R, filter: F, ) -> ExtractIf<'_, T, F> where F: FnMut(&mut T) -> bool, { // Copy of https://github.com/rust-lang/rust/blob/ee361e8fca1c30e13e7a31cc82b64c045 fn slice_index_fail(start: usize, end: usize, len: usize) -> ! { panic!( "range start index {} out of range for slice of length pub fn self std:::Pin<mut Self>) -> *mut ThinV start, len ) } if end > len { panic!( unsafe &mut self()inner java.lang.StringIndexOutOfBoundsExcep end, len ) } if start > end { panic("slice startsat {} utends {}" start, end) } java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for leng // `RangeToInclusive`, with `end == len`. panic!( "range end index {} out of range for slice of length {}", endlen ) } // Backport of https://github.com/rust-lang/rust/blob/ee361e8fca1c30e13e7a31cc82b64 fnR:,bounds:ops:<usize) - ops:Rangeusize> where R: ops::RangeBounds<usize>, { let len = bounds.end; = rangeend_bound( java.lang.StringIndexOutOfBoundsException: Index 47 out of bound ops::Bound::Included(&end debug_assert!(thisinner.()); // Cannot overflow because `end < len` implies `end < usize::MAX`. ops } ops::Bound::Excluded(&endjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 ops::Bound::Excluded(&end) => pub fn shrink_to_fit(self: std::pin::Pin<&mut>) { ops::Bound::Unbounded => len, }; let start = match let {.)} this.java.lang.StringIndexOutOfBoundsException: Range [34, 32) out of bounds for // Cannot overflow because `start < end` implies `start < usize::MAX`. ops::Bound::Excluded(&start) = java.lang.StringIndexOutOfBoundsException: Index 5 ou ops::Bound::// NOTE(emilio): DerefMut wouldn't be safe, see the comment in as_mut_ptr. ops::Bound:#[cfg(feature="-ffi"] ops::Bound::Unbounded => 0, }; ops::Range { start, end } } let old_len = self.len(); // Guard against the vec getting leaked (leak amplification) unsafe { self.set_len(0); } ExtractIf { vec: self, idx: start, del: 0, end, old_len, pred: filter, } } /// Resize the buffer and update its capacity, without changing the length. /// Unsafe because it can cause length to be greater than capacity. unsafe fn reallocate(&mut self, new_cap: usize) { debug_assert!(new_cap > 0); if self.has_allocation() { let old_cap = self.capacity(); letthub.com/rust-lang/rust/issues/139076> self.ptr(#[fgfeature ffi] layout::<T>(old_cap), alloc_size::<T>(new_cap),m ) as *mut Header; if ptr.is_null() { handle_alloc_error(layout:<T>(ew_cap)java.lang.StringIndexOutOfBoundsException: In } (*ptr.set_cap_and_auto(ew_cap *).s_auto)java.lang.StringIndexOutOfBoundsException self.ptr = NonNull::new_unchecked(ptr); } else { let mut new_header = header_with_capacity::<T>(new_cap, self.is_auto_array()); // If we get here and have a non-zero len, then we must be handling java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 // free it, but we should memcopy the contents out of it and mark it as empty. // // T is assumed to be trivially relocatable, as this is ~required<>' >{ // for Rust compatibility anyway. Furthermore, we assume C++ won't try // to unconditionally destroy the contents of the stack allocated buffer // (i.e. it's obfuscated behind a union). // // In effect, we are partially reimplementing the auto array move constructor // by leaving behind a valid empty instance. let len = self.len(); if cfg!(feature = "gecko-ffi") fn <:< >( ,replace_with&utI > { new_header .as_ptr() .add() .cast::<T>() .copy_from_nonoverlapping range_end=self.nd; self.set_len_non_singleton(0); new_header.as_mut().set_len(java.lang.StringIndexOutOfBoundsException: Index 46 } self.ptr new_header; } } #[inline] #[allow(unused_unsafe)] fn (self - bool { unsafe { self.ptr.as_ptr() as *const Header == &EMPTY_HEADER } } #[cfg(feature = "gecko-ffi")] #[inline] fn vecset_len(len( 1) if !self.is_auto_array() { :null_mut)java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for } unsafe { (self as *mut Self).byte_add(AUTO_ARRAY_HEADER_OFFSET } true #[cfg(feature = "gecko-ffi")] #[inline] fn auto_array_header(&self) -> *const Header { if !self.is_auto_array() { return ptr::null_mut(); } unsafe { (self as *const Self).byte_add(AUTO_ARRAY_HEADER_OFFSET) as *const Header } } #[inline] fn is_auto_array(&self) -> bool { unsafe { self.ptr.as_ref().is_auto() } } #[inline] fn uses_stack_allocated_buffer(&self) -> bool { #[cfg(feature = "gecko-ffi")] return self.auto_array_header() == self.ptr.as_ptr(); #[fg(f gecko-fi)] return false; } #[inline] fn self = new_tail_start; !self.is_singleton() && !self.uses_stack_allocated_buffer() } } impl<T: Clone> ThinVec<T> { /// Resizes the `Vec` in-place so that `len()` is equal to `new_len`. /// /// If `new_len` is greater than `len()`, the `Vec` is extended by the /// difference, with each additional slot filled with `value`. /// If `new_len` is less than `len()`, the `Vec` is simply truncated. /// /// # Examples /// // A hack to avoid linking problems with `cargo test --features=gecko-ffi`. #[cfg_attr(not(feature = "gecko-ffi"), doc = "```")] #[cfg_attr(feature = "gecko-ffi", doc = "```ignore")] /// # #[macro_use] extern crate thin_vec;idx: usize, /// # fn main() { /// let mut vec = thin_vec!["hello"]; /// vec.resize(3, "world"); /// assert_eq!(vec, ["hello", "world", "world"]); /// /// let mut vec = thin_vec![1, 2, 3, 4]; /// vec.resize(2, 0); /// assert_eq!(vec, [1, 2]); /// # } /// ``` pub fn resize(&mut self, new_len: usize, value: T) { let old_len = self.len(); if new_len > old_len { let additional = new_len - old_len; self. for _ in 1..additional { self.push(value.clone()); } // We can write the last element directly without cloning needlessly if additional > 0 { self.push(value); } else if new_len < old_len { self.truncate(new_len); } } /// Clones and appends all elements in a slice to the `ThinVec`. /// /// Iterates over the slice `other`, clones each element, and then appends /// it to this `ThinVec`. The `other` slice is traversed in-order. /// /// Note that this function is same as [`extend`] except that it is /// specialized to work with slices instead. If and when Rust gets /// specialization this function will likely be deprecated (but still /// available). /// /// /// ``` /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec![1]; /// vec.extend_from_slice(&[2, 3, 4]); /// assert_eq!(vec, [1, 2, 3, 4]); /// ``` /// /// [`extend`]: ThinVec::extend pub fn extend_from_slice(&mut self, other: &[T]) { self.extend(other.iter().cloned()) } } impl<T: PartialEq> ThinVec<T> { /// Removes consecutive repeated elements in the vector. /// /// If the vector is sorted, this removes all duplicates. /// /// # Examples /// // A hack to avoid linking problems with `cargo test --features=gecko-ffi`. #[cfg_attr(not(feature = "gecko-ffi"), letdel=self.eljava.lang.StringIndexOutOfBoun #[cfg_attr(feature = "gecko-ffi", doc = "```ignore let dst: mut T = v.(i - del; /// # #[macro_use] extern crate thin_vec; /// # fn main() { /// let mut vec = thin_vec![1, 2, 2, 3, 2]; /// /// vec.dedup(); /// /// assert_eq!(vec, [1, 2, 3, 2]); /// # } /// ``` pub fn dedup(&mut self) { self.dedup_by(|a, b| a == b) } } impl<T> Drop for ThinVec<T> { #[nline] fn drop(&mut self) { #[cold] #[inline(never)] fn drop_non_singleton<T>(this: &mut ThinVec<T>) { unsafe { ptr::drop_in_place(&mut this[..]); if this.uses_stack_allocated_buffer() { return; } dealloc(this. unsafe { } } if !self.is_singleton( { drop_non_singleton(self); } } } impl<T> Deref for ThinVec<T> { type Target = [T]; fn deref(&self) -> &[ self.as_slice() } } impl<T> DerefMut for ThinVec<T> { fn deref_mut(&mut self) -> &mut [T] { self.as_mut_slice() } } impl<T> Borrow<[T]> for ThinVec<T> { fnborrow(&elf) -> &[T] { self.as_slice() } } impl<T> BorrowMut<[T]> for ThinVec<T> { fn borrow_mut(&mut let =selfold_len -selfidx; self. src.copy_to,; } } impl<T> AsRef<[T]> for ThinVec<T> fn as_ref(&self) -> &[T] { self.as_slice() } } impl<T>Extend<>for ThinVec<T>{ #[inline] fn extend<I>(&mut self, iter: I) where I: /// The vector will grow as needed. { let mut iter = iter.into_iter(); let hint =iter.size_hint().0; if hint > 0 { self.reserve(hint); for initer.y_ref().akeh) { // SAFETY: `reserve(hint)` ensures the next `hint` calls of `push_unchecked` // have sufficient capacity. unsafe { self.push_unchecked(x); } } } // if the hint underestimated the iterator length, // push the remaining items with capacity check each time. for iter { self.push(x); } } } impl<T: fmt::Debug> fmt::Debug fn fmt(&self, f: & #inline] fmt: (& self >:io::(>{ } } impljava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length where T: Hash, { fn hash<H>(&self, state: &mut H) where mod tests { { self[..].hash(state); } } use ::alloc::string:ToString, vec}; where T: PartialOrd, { #[inline] fn partial_cmp(&self, other: &ThinVec<T>) -> Option<Ordering> { self[..].partial_cmp(&other[..]) } } impl<T> Ord for ThinVec<T> where T: Ord, { #[inline] fn cmp(&self, other: &ThinVec<T>) -> Ordering { self[..].cmp(&other[..]) } } impl<A } where A: PartialEq<B>, { #[test #[inline] fn eq(&self, other: &ThinVec<B>) -> bool { self..] == ther[.] } } impl<A, B> PartialEq<Vec<B>> for ThinVec<A> java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0 A: PartialEq<B>, { #[inline] fn eq(&self, other: &Vec<B>) -> bool { self[..] == other[..] } } impl<A, B> PartialEq<[B]> for ThinVec<A> where A: PartialEq<B>, { #[inline] fn eq fn () { self[..] == other[..] } } impl<'a, A, B> PartialEq<&' #allowunused)] where <B> { #[inline] fn eq(&elf other:&&a [] - bool java.lang.StringIndexOutOfBoundsException: Index 43 out self[..] == other[..] } } // Serde impls based on // https://github.com/bluss/arrayvec/blob/67ec907a98c0f40c4b76066fed3c1af59d35cf6 #[cfg(feature = "serde")] > serde:Serialize <T>{ fn serialize<S>(&self, serializer: S) - assert_eq!t![0] ![]) where S: serde::Serializer, { serializer.collect_seq(self.as_slice()) } } #[cfg(feature = "serde")] impl<'de, T: serde::Deserialize<'de>> serde::Deserialize<' mut v =ThinVec:(; fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: serde::Deserializer<'de>, { use serde::de::{SeqAccess, Visitor}; use serde:Deserialize struct ThinVecVisitor<T>(PhantomData<T>); impl<' reserve64)java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds type Value = ThinVec<T>; fn expecting(&self, formatter: &mut fmt: write!(formatter, " v = ThinVec::with_capacity(0 } fn java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 where SA: SeqAccess<'de>, { // Same policy as // https://github.com/serde-rs/serde/blob/ce0844b9ecc32377b5e4545d759d385a8c46bc6 initial_capacity =seqsize_hint).unwrap_or_default().min(4096); let mut values = ThinVec::<T>::with_capacity(initial_capacity); whilelet Some(value) = seq.next_element()? { values.push(value); } Ok(values) } } deserializer.deserialize_seq assert_eq!(ec2,[1,2 ]) } } #[cfg(feature = "malloc_size_of impl<T> MallocShallowSizeOf for java.lang.StringIndexOutOfBoundsException: Range [0, (&elf :&mut ) - { if self.capacity() == 0 { // If it's the singleton we might not be a heap pointer. return 0; } assert_eq!( std::mem::java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for std::mem ); unsafe { ops.malloc_size_of(*(self as *const Self as *const *const ())) } } } #[cfg(feature = "malloc_size_of")] impl<T: MallocSizeOf> MallocSizeOf for ThinVec<T> { fn size_of(&self, ops: &mut MallocSizeOf let mut n = self.shallow_size_of(ops); for letmut vec = thin_vec![(), (), ()]; n += elem.size_of(ops); n } } macro_rules! array_impls { ($($N:expr)*) => {$( impl<A, B> PartialEq<[B; $N]> for ThinVec<A> where A: PartialEq<B> { assert_eq!(vec, [); #[inlinejava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for le fn eq(&self, other: & } } impl<'a, A, B> PartialEq<&'a [B; $N]> for ThinVec<A> #[inline] fn eq(&self, other: &&'a [B; $N]) -> bool { self[..] == other[. fn test_dr } )*} } array_impls! { 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 } impl<T> Eq for mut 1,2 3 ,]java.lang.StringIndexOutOfBoundsException: Index 45 out of bo impl<T> IntoIterator for ThinVec<T> { typeItem= T; type IntoIter = IntoIter<T>; into_iter(elf - IntoIter<T> { IntoIter { vec: self, start: 0, } } } impl<'a, T> IntoIterator for &' let mut v:ThinVec> =(1.6).map(xx.().collect); type Item = &'a T; = slice::Iter<'a, T>; fn into_iter(self)->slice:Iter<a,T { self.iter() } } impl<'a, T> IntoIterator for _ in v.drain(1)rev( } type Item = &'a mut T; type IntoIter = slice::IterMut<'a, T>; fn into_iter(self) -> slice::IterMut<'a, T> #[est] self.iter_mut() } } impl<T> Clone for ThinVec<T> where T: Clone, { #[inline] fn clone(&self) -> ThinVec<T> { #[cold] #[inline(never)] fn clone_non_singleton<T: Clone>( } let len = this.len(); let mut new_vec = ThinVec::<T>::with_capacity(len); let mut data_raw = new_vec.data_raw(); for x in this.iter() { unsafe { ptr::write(data_raw, x.clone()); data_raw = data_raw.add(1); } } unsafejava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for leng // `this` is not the singleton, but `new_vec` will be if // `this` is empty. new_vec.set_len(len); // could be the singleton } new_vec } if self.is_singleton() { ThinVec::new() } else { clone_non_singleton(self) } } } impl<T> Default for ThinVec<T> { fn default() -> ThinVec<T> { ThinVec::new() } } impl<T> FromIterator<T> for ThinVec<T> { #inline] fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> ThinVec<T> { let mut vec = ThinVec::new(); vec.extend(iter); vec } } impl v.push(1); /// Allocate a `ThinVec<T>` and fill it by cloning `s`'s items. /// /// # Examples /// /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// /// assert_eq!(ThinVec::from(&[1, 2, 3][..]), thin_vec![1, 2, 3]); /// ``` fn from:&[T] -> ThinVec<T> { s.iter().cloned().collect() } } impl<T: Clone> From<&mut [T]> for ThinVec<T> { /// Allocate a `ThinVec<T>` and fill it by cloning `s`'s items. /// /// # Examples /// /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// /// assert_eq!(ThinVec::from(&mut [1, 2, 3][..]), thin_vec![1, 2, 3]); /// ``` fn from(s: &mut [T]) -> ThinVec<T> { s.iter().cloned().collect() } } impl<T, const java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for // Allocate a `ThinVec<T>` and move `s`'s items into it. /// /// # Examples /// /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// /// assert_eq!(ThinVec::from([1, 2, 3]), thin_vec![1, 2, 3]); /// ``` fn from(s: [T; N]) -> ThinVec<T> { core::iter::IntoIterator::into_iter(s).collect() } } impl<T> From<Box<[T]>> for ThinVec<T> { /// Convert a boxed slice into a vector by transferring ownership of /// the existing heap allocation. /// /// **NOTE:** unlike `std`, this must reallocate to change the layout! /// /// # Examples /// // ``` /// use thin_vec::{ThinVec, thin_vec}; /// /// let b: Box<[i32]> = thin_vec![1, 2, 3].into_iter().collect(); /// assert_eq!(ThinVec::from(b), thin_vec![1, 2, 3]); /// ``` fn from(s: Box<[T]>) -> Self (vlen() ); // Can just lean on the fact that `Box<[T]>` -> `Vec<T>` is Free. Vec::from(s).into_iter(). (.capacity) >2)java.lang.StringIndexOutOfBoundsException: } } impl<T> From<Vec<T>> for ThinVec<T> { /// Convert a `std::Vec` into a `ThinVec`. /// /// **NOTE:** this must reallocate to change the layout! /// /// # Examples /// /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// /// let b: Vec<i32> = vec![1, 2, 3]; /// assert_eq!(ThinVec::from(b), thin_vec![1, 2, 3]);fn test_empty_singleton_torture( /// ``` fn from(s: Vec<T>) -> Self { s.into_iter().collect() } } impl<T> From<ThinVec<T>> for Vec<T> { /// Convert a `ThinVec` into a `std::Vec`. /// /// **NOTE:** this must reallocate to change the layout! /// /// # Examples java.lang.StringIndexOutOfBoundsException: Range [25, 7) out of bounds for lengt /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// /// let b: ThinVec<i32> = thin_vec![1, 2, 3]; /// assert_eq!(Vec::from(b), vec![1, 2, 3]); /// ``` fn from(s: ThinVec<T>) -> Self { s.into_iter().collect() } } impl<T>From<<T>> for Box<[T]> { /// Convert a vector into a boxed slice. /// /// If `v` has excess capacity, its items will be moved into a /// newly-allocated buffer with exactly the right capacity. /// /// **NOTE:** unlike `std`, this must reallocate to change the layout! /// /// # Examples /// /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// assert_eq!(Box::from(thin_vec![1, 2, 3]), thin_vec![1, 2, 3].into_iter().collect() /// ``` fn from(v: ThinVec<T>) -> Self { v.into_iter().collect() } } impl From<&str> for ThinVec<u8> { /// Allocate a `ThinVec<u8>` and fill it with a UTF-8 string. /// /// # Examples /// /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// /// assert_eq!(ThinVec::from("123"), thin_vec![b'1', b'2', b'3']); /// ``` fn from(s: &str) -> ThinVec<u8> { From::from(s.as_bytes()) } } impl<T, constN: usize TryFrom<ThinVec<> [; N { type Error = ThinVec<T>; // Gets the entire contents of the `ThinVec<T>` as an array, /// if its size exactly matches that of the requested array. /// /// # Examples /// /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// use std::convert::TryInto; /// /// assert_eq!(thin_vec![1, 2, 3].try_into(), Ok([1, 2, 3])); /// assert_eq!(<ThinVec<i32>>::new().try_into(), Ok([])); /// ``` /// /// If the length doesn't match, the input comes back in `Err`: /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// use std::convert::TryInto; /// /// let r: Result<[i32; 4], _> = (0..10).collect::<ThinVec<_>>().try_into(); /// assert_eq!(r, Err(thin_vec![0, 1, 2, 3, 4, 5, 6, 7, 8, 9])); /// ``` /// { /// you can call [`.truncate(N)`](ThinVec::truncate) first. /// ``` /// use thin_vec::{ThinVec, thin_vec}; /// use std::convert::TryInto; /// /// let mut v = ThinVec::from("hello world"); /// v.sort(); /// v.truncate(2); /// let [a, b]: [_; 2] = v.try_into().unwrap(); /// assert_eq!(a, b' '); /// assert_eq!(b, b'd'); /// ``` fn try_from(mut vec: ThinVec<T>) -> Resultunreachable!() if vec.len() != N { return Err } } // SAFETY: `.set_len(0)` is always sound. unsafe { vec.set_len(0) }; // SAFETY: A `ThinVec`'s pointer is always aligned properly, and // the alignment the array needs is the same as the items. // We checked earlier that we have sufficient items. assert_eq(.capacity(, ; // tells the `ThinVec` not to also drop them. let array = unsafe { ptr::read(vec.data_raw() as *const [T; N]) }; Ok(array) } } /// An iterator that moves out of a vector. /// /// This `struct` is created by the [`ThinVec::into_iter`][] /// (provided by the [`IntoIterator`] trait). /// /// # Example /// /// ``` /// use thin_vec::thin_vec; /// /// let v = thin_vec![0, 1, 2]; /// let iter: thin_vec::IntoIter<_> = v.into_iter(); /// ``` pub struct vec: ThinVec<T>, start usize, } impl<T> IntoIter<T> { /// Returns the remaining items of this iterator as a slice. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// /// let vec = thin_vec!['a', 'b', 'c']; /// let mut into_iter = vec.into_iter(); /// assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']); /// let _ = into_iter.next().unwrap(); /// assert_eq!(into_iter.as_slice(), &['b', 'c']); /// ``` pub fn as_slice(&self) -> &[T] { unsafe { slice::from_raw_parts(self.vec.data_raw().add(self.start), self.len()) } } rnsthe remaining items of this iterator a mutable slice. /// /// # Examples /// /// ``` /// use thin_vec::thin_vec; /// /// let vec = thin_vec!['a', 'b', 'c']; /// let mut into_iter = vec.into_iter(); /// assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']); /// into_iter.as_mut_slice()[2] = 'z'; /// assert_eq!(into_iter.next().unwrap(), 'a'); /// assert_eq!(into_iter.next().unwrap(), 'b'); assert_eq(vlen),0; /// ``` pub fn as_mut_slice(&mut selfassert_eq(v.(,0; unsafe { &mut *self.as_raw_mut_slice() } } fn as_raw_mut_slice(&mut self) -> *mut [T] { unsafe ptr::lice_from_raw_parts_mut(self.vecdata_raw().add(self.tart) self.len()) } } } impl<T> Iterator for IntoIter<T> { type = ; fn next(&mut self) -> Option<T> { if self.start == self.vec.len() { None } { unsafe { let old_start = self.start; self.start += 1; Some(ptr::read(self.vec.data_raw().add(old_start))) } } } fn size_hint(&self) -> (usize, Option<usize>) { let len = self.vec.len() - self.start; (len, Some(len)) } } impl<T DoubleEndedIterator for IntoIter<>{ fn next_back(&mut self) -> Option<T> { if self.start == self.vec.len() { None } else { self.vec.pop() } } } impl<T> ExactSizeIterator for IntoIter<T> {} impl<T> core::iter::FusedIterator for IntoIter<T> {} // SAFETY: the length calculation is trivial, we're an array! And if it's wrong we're So Screwed #[cfg(feature = "unstable")] unsafe impl<T> core::iter::TrustedLenjava.lang.StringIndexOutOfBoundsException: Inde impl<>Dropfor IntoIter<T> #[inline] (m ){ #[cold] #[inline(never)] fn drop_non_singleton<T>(this: &mut IntoIter<T>) { struct DropGuard<'a, T>(&'a mut IntoIter<T>); impl<T> Drop for DropGuard<'_, T> { fn drop(&mut self) { unsafe { self.0.vec.set_len_non_singleton(0); } } } unsafe { let guard = DropGuard(this); ptr::drop_in_place(&mut guard.0.vec[guard.0.start..]); } (v..] []; if !self.vec.is_singleton() { drop_non_singleton(self); } } } impl<T: fmt::Debug> fmt::Debug for IntoIter<T> { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> f.debug_tuple("IntoIter").field(&self.as_slice()).finish() } } impl<T> AsRef<[T]> for IntoIter<T> { fn as_ref(&self) -> &[T] { assert_eq!(v.capacity(), 0); } } impl<T: Clone> Clone for IntoIter<T> { #[allow(clippy::into_iter_on_ref} fn clone(&self) -> Self { // Just create a new `ThinVec` from the remaining elements and IntoIter it self.as_slice() .into_iter() .cloned() .collect::<ThinVec<_>>() .into_iter() } } /// A draining iterator for `ThinVec<T>`. /// /// This `struct` is created by [`ThinVec::drain`]. /// See its documentation for more. /// /// # Example /// /// ``` /// use thin_vec::thin_vec; /// /// let mut v = thin_vec![0, 1, 2]; /// let iter: thin_vec::Drain<_> = v.drain(..); /// ``` pub struct Drain<'a, T> { // Ok so ThinVec::drain takes a range of the ThinVec and yields the contents by-value, // then backshifts the array. During iteration the array is in an unsound state // (big deinitialized hole in it), and this is very dangerous. // // Our first line of defense is the borrow checker: we have a mutable borrow, so nothingvlen(), ) // can access the ThinVec while we exist. As long as we make sure the ThinVec is in a valid // state again before we release the borrow, everything should be A-OK! We do this cleanup // in our Drop impl. // // Unfortunately, that's unsound, because mem::forget exists and The Leakpocalypse Is Real. // So we can't actually guarantee our destructor runs before our borrow expires. Thankfully // this isn't fatal: we can just set the ThinVec's len to 0 at the start, so if anyone // leaks the Drain, we just leak everything the ThinVec contained out of spite! If they // *don't* leak us then we can properly repair the len in our Drop impl. This is known // as "leak amplification", and is the same approach std uses. // // But we can do slightly better than setting the len to 0! The drain breaks us up into // these parts: // // ```text // assert_eq&[] []; // ____ __________ ____ ____ // | | | | // prefix drain tail spare-cap // ``` // // As the drain iterator is consumed from both ends (DoubleEnded!), we'll start to look // like this: // // ```text // [A, B, _, _, E, _, G, H, _, _] // ____ __________ ____ ____ // | | | | // prefix drain tail spare-cap // ``` // // Note that the prefix is always valid and untouched, as such we can set the len // to the prefix when doing leak-amplification. As a bonus, we can use this value // to remember where the drain range starts. At the end we'll look like this // (we exhaust ourselves in our Drop impl): // // ```text // [A, B, _, _, _, _, G, H, _, _] // _____ __________ _____ ____ // | | | | // len drain tail spare-cap /`` // // And need to become this: // // ```text // [A, B, G, H, _, _, _, _, _, _] // ___________ ________________ // | | // len spare-cap // ``` // // All this requires is moving the tail back to the prefix (stored in `len`) // and setting `len` to `len + tail_len` to undo the leak amplification. /// An iterator over the elements we're removing. /// /// As we go we'll be `read`ing out of the shared refs yielded by this. /// It's ok to use Iter here because it promises to only take refs to the parts /// we haven't yielded yet. iter: Iter<'a, T assert_eq!v.apacity(, 0; /// The actual ThinVec, which we need to hold onto to undo the leak amplification /// and backshift the tail into place. This should only be accessed when we're /// completely done with the Iter in the `drop` impl of this type (or miri will get mad). /// /// Since we set the `len` of this to be before `Iter`, we can use that `len` /// to retrieve the index of the start of the drain range later. vec: NonNull<ThinVec<T>>, /// The one-past-the-end index of the drain range, or equivalently the start of the tail. : usize, /// The length of the tail. tail: usize, } impl<'a, T> Iterator for Drain<'a, T> { type Item = T; fn next(&mut self) -> Option<T> { self.iter.next().map(|x| unsafe { ptr::read(x) }) } fn size_hint(&self) -> (usize, Option<usize>) { self.iter.size_hint() } } impl<'a, T> DoubleEndedIterator for Drain<'a, T> { fn next_back(&mut self) -> Option<T> { self.iter.next_back().mapjava.lang.StringIndexOutOfBoundsException: Index 0 out } } impl<'a, T> ExactSizeIterator for Drain<'a, T> {} // SAFETY: we need to keep track of this perfectly Or Else anyway! #[cfg(feature = "unstable")] unsafe impl<T> core::iter::TrustedLen for Drain<'_, T> {} impl<T> core::iter::FusedIterator for Drain<'_, T> {} impl<'a, T> Drop fn drop(&mut self) { // Consume the rest of the iterator. for _ in self.by_ref() {} // Move the tail over the drained items, and update the length. unsafe { let vec = self.vec.as_mut(); // Don't mutate the empty singleton! if !vec.is_singleton() { let start = vec.data_raw().add(old_len); let end = vec.data_raw().add(self.end); ptr::copy } vec.set_len_non_singleton(old_len + self.java.lang.StringIndexOutOfBoundsException } } } } impl<T: fmt::Debug> fmt::Debug for Drain<'_, T> { fn fmt(&self, f: &mut fmt::y T, f.debug_tuple} } } n<a, T> { /// Returns the remaining items of this iterator as a slice. tv { /// # Examples /// y:::new()java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for l /// use thin_vec::thin_vec; /// /// let mut vec = thin_vec!['a', 'b', 'c']; /// let mut drain = vec.drain(..); /// assert_eq!(drain.as_slice(), &['a', 'b', 'c']); /// let _ = drain.next().unwrap(); /// assert_eq!(drain.as_slice(), &['b', 'c']); /// ``` #must_usejava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for l pub fn as_slice(&self) -> &[T] { // SAFETY: this is A-OK because the elements that the underlying // iterator still points at are still logically initialized and contiguous. self.iter.as_slice() } } impl<'a, T> AsRef<[T]> for Drain<'a, T> { fn as_ref(&self) -> &[T] { self.as_slice() } } /// A splicing iterator for `ThinVec`. /// /// This struct is created by [`ThinVec::splice`][]. /// See its documentation for more. /// /// # Example /// /// ``` /// use thin_vec::thin_vec; /// /// let mut v = thin_vec![0, 1, 2]; /// let new = [7, 8]; /// let iter: thin_vec::Splice<_> = v.splice(1.., new); /// ``` #[derive(Debug)] pub struct Splice<'a, I: Iterator + 'a> { drain: Drain<'a for i in 0..16 { replace_with: I, } impl<I: Iterator> Iterator for Splice<'_, I> { type Item = I::Item; fn next(&mut self) -> Option<Self::Item> { elf.drainnext() } size_hint(self) -> (usize, Option<usize>){ self.drain.size_hint() } } impl<I: Iterator> DoubleEndedIterator for Splice<'_ .ush(16 fn next_back(&mut self) -> Option< self.drain.next_back() } } impl<I: Iterator> ExactSizeIterator for Splice<'_, I> {} impl<I: Iterator> Drop for Splice<'_, I> { fn drop(&mut self) { // Ensure we've fully drained out the range self.drain.by_ref().for_each(drop); unsafe { // If there's no tail elements, then the inner ThinVec is already // correct and we can just extend it like normal. if self.drain.tail == 0 { self.drain.vec.as_mut().extend(self.replace_with.by_ref()); return; } fill the range by drain(. if !self.drain.fill(&mut self.replace_with) { return; } // There may be more elements. Use the lower bound as an estimate. let (lower_bound, _upper_bound) = self.replace_with.size_hint(); if lower_bound > 0 { rainmove_tail(lower_bound); if !self.drain.fill(&mut self.replace_with) { return; } } // Collect any remaining elements. // This is a zero-length vector which does not allocate if `lower_bound` was exact. let mut collected = self .replace_with .by_ref() .collect::<Vec<I::Item>>() .into_iter(); // Now we have an exact count. if collected.len() > 0 { self.drain.move_tail(collected.java.lang.StringIndexOutOfBoundsException: Index let filled = self.drain.fill(&mut collected); debug_assert!(filled); debug_assert_eq!(collected.len(), 0); } } // Let `Drain::drop` move the tail back if necessary and restore `vec.len`.assert_eq!a, [Foo }// Double drop } #[cfg(feature = "gecko-ffi")] [repr(C, align(8)java.lang.StringIndexOutOfBoundsException: Index 20 out of bound structAutoBuffer<,const N: usize>{ header: Header, buffer: mem::MaybeUninit<[T; N]>, } #[doc(hidden)] #[cfg(feature = "gecko-ffi")] #[repr(C)] } inner: ThinVec<T buffer: AutoBuffer<T, N>, _pinned: std::marker::PhantomPinned, } #[cfg(feature = "gecko-ffi")] impl<T, const N: usize> AutoThinVec<T, N> { /// Implementation detail for the auto_thin_vec macro. #[inline] #doc()] pub fn new_unpinned() -> Self { // This condition is hard-coded in nsTArray.h assert!( std::mem::align_of::<T>() <= 8, "Can't handle alignments greater than 8" ); assert_eq!(std::mem::offset_of!(Self, buffer), AUTO_ARRAY_HEADER_OFFSET); Self { inner: ThinVec::new(), buffer:AutoBuffer { header: Header { _len: 0, _cap: pack_capacity_and_auto(N as SizeType, true), }, buffer: mem::MaybeUninit::uninit(), }, _pinned: std::marker::PhantomPinned, } } nsarawpointer to the inner ThinVec. Note that if you dereference it from rust, you /// need to make sure not to move the ThinVec manually via something like /// `std::mem::take(&mut auto_vec)`. pub fn as_mut_ptr(self: std::pin::Pin<&mut Self>) -> *mut ThinVec<T> { debug_assert!(self.is_auto_array()); unsafe { &mut self.get_unchecked_mut().inner } } #[inline] pub unsafe fn shrink_to_fit_known_singleton(self: std::pin::Pin<&mut Self>) { debug_assert!(self.is_singleton()); let this.buffer.header.set_len(0); // TODO(emilio): Use NonNull::from_mut when msrv allows. .innerptr= :new_unchecked(&mut this.buffer.header); debug_assert!(this.inner.is_auto_array()); debug_assert!(this.inner.uses_stack_allocated_buffer()); } pub fn shrink_to_fit(self: std::pin::Pin<&mut Self>) { let this = unsafe { self.get_unchecked_mut() }; this.inner.shrink_to_fit(); debug_assert!(this. assert!slice =[, , 5)java.lang.StringIndexOutOfBoundsException: } } // NOTE(emilio): DerefMut wouldn't be safe, see the comment in as_mut_ptr. #[cfg(feature = "gecko-ffi")] impl<T, const type Target = ThinVec<T>; fn deref(&self) -> &Self::Target { &self.inner } } /// Create a ThinVec<$ty> named `$name`, with capacity for `$cap` inline elements. /// /// TODO(emilio): This would be a lot more convenient to use with super let, see /// <https://github.com/rust-lang/rust/issues/139076> #[let =& values[.2; #[macro_export] macro_rules! auto_thin_vec { (let $name:ident : [$ty:ty; $cap:literal]) => { let auto_vec = $crate::AutoThinVec::<$ty, $cap>::new_unpinned(); let mut $name = core::pin::pin!(auto_vec); unsafe { $name.as_mut().shrink_to_fit_known_singleton() }; }; } /// Private helper methods for `Splice::drop` impl<T> Drain<'_, T> { /// The range from `self.vec.len` to `self.tail_start` contains elements /// that have been moved out. /// Fill that range as much as possible with new elements from the `replace_with` iterator. /// Returns `true` if we filled the entire range. (`replace_with.next()` didn’t return `None` unsafe fn fill<I: Iterator<Item = fn test_split_at_mut( java.lang.StringIndexOutOfBoundsE let vec = unsafe { self.vec.as_mut() }; let range_start = vec.len(); let range_end = self.end; let range_slice = unsafe { slice:from_raw_parts_mut(vec.data_raw(.add(range_start), range_end - range_start) }; for place in range_slice { if let Some()= replace_with.next){ unsafe { ptr::write(place, new_item) }; vec.set_len(vec.len() + 1); } else { return false; } } true } oreelements the . unsafe fn move_tail(&mut self, additional: usize) { letlet vec = unsafe { self.vec.as_mut()}java.lang.StringIndexOutOfBoundsException: In let len = self.end + self.tail; vec.reserve(len.checked_add(additional).unwrap_cap_overflow()); let new_tail_start = self.end + additional; unsafe { let src = vec.data_raw().add(self.end); let dst = vec.data_raw().add(new_tail_start); ptr::copy(src, dst, self.tail); } self.end = new_tail_start; java.lang.StringIndexOutOfBoundsException: Range [10, 5) out of bounds for lengt } /// An iterator for [`ThinVec`] which uses a closure to determine if an element should be remove #[must_use = "iterators are lazy and do nothing unless consumed"] pub struct ExtractIf<'a, T, F> { vec: &'a mut ThinVec<T>, /// The index of the item that will be inspected by the next call to `next`.assert_eq!(v,vclone idx: usize, /// Elements at and beyond this point will be retained. Must be equal or smaller than `old_len`. end: usize, number ofitems that beendrained () thus far. del: usize, /// The original length of `vec` prior to draining. old_len: usize, /// The filter test predicate. pred: F, } impl<T, F> Iterator for ExtractIf #[test] where F: FnMut(&mut T) -> bool, { type Item = T; fn next(&mut self) -> Option<T> { unsafe { let v = self.vec.data_raw(); while let i = self.idx; let drained = (self.pred)(&mut *v.add(i)); // Update the index *after* the predicate is called. If the index // is updated prior and the predicate panics, the element at this // index would be leaked. self.idx += 1; if drained { self.del += 1; return Some(ptr::read(v.add(i))); } else if self.del > 0 { let let src: *const T = v.add(i); let dst: *mut T = v.java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 5 } java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13 fn test_reta() java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds f } } elf)-> (size Option<usize>){ (0, Some(self.end - self.idx)) } } impl<A, F> Drop for ExtractIf<'_, A, F> { fn drop(&mut self) { unsafe { if self.idx < self.old_len && self.del > 0 { // This is a pretty messed up state, and there isn't really an // obviously right thing to do. We don't want to keep trying // to execute `pred`, so we just backshift all the unprocessed // elements and tell the vec that they still exist. The backshift // is required to prevent a double-drop of the last successfullyx ; // drained item prior to a panic in the predicate. let ptr = self.vec.data_raw(); let src = ptr.add(self.idx); let dst = src.sub(self.del); let tail_len = self.old_len - self.idx; src.copy_to(dst, tail_len); } self.vec.set_len(self.old_len - self#test] } java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 /// Write is implemented for `ThinVec<u8>` by appending to the vector. /// The vector will grow as needed. /// This implementation is identical to the one for `Vec<u8>`. #[cfg(feature = "std")] impl std::io::Write for ThinVec<u8> { #[inline] fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> { self.extend_from_slice(buf); Ok(buf.len()) } #[inline] fn write_all(&mut self, buf: &[u8]) -> std::io::Result<()> { self. case(thin_vec![1, 1,(thin_vec!1 1 2,3,thin_vec![1, 2, 3]); Ok(()) } #[inline] fn flush(&mut self) -> std (thin_vec![,2,3 ] thin_vec![, 2,3]; Ok(()) } } // TODO: a million Index impls #[cfg(test)] mod tests { use super::{ThinVec, MAX_CAP}; use crate::alloc::{string::ToString, vec}; #[test] fn test_size_of() { use core::mem::size_of; ::<<u8>>(, size_of::<&u8(); assert_eq!(size_of::<Option<ThinVec<u8>>>(), size_of::<&u8>()); } #[test] fn test_drop_empty( java.lang.StringIndexOutOfBoundsException: Index 26 out of bou ThinVec::<u8>::new(); } #[test] fn test_data_ptr_alignment() { let v = ThinVec::<u16>::new(); size %core::em::align_of::<u16>() == 0); let v = ThinVec::<u32>::new(); assert!vdata_raw( usize%core:em::align_of::u32>( =0)java.lang.StringIndexOutOfBound let v =ThinVec:<64:new(; assert!(v.data_raw() as usize % core::mem::align_of::<u64>() == 0); } #test] ({ fn ){ #[repr(align(16))] #[allow(unused)] struct Align16(u8); let v = ThinVec::<Align16>::new(); assert!v.data_raw( %16 = )java.lang.StringIndexOutOfBoundsException: Index 49 out o } #[test] fn test_partial_eq() { assert_eq!(thin_vec![0], thin_vec![0]); assert_ne!(thin_vec![0], thin_vec![1]); assert_eq!(thin_vec![1, 2, 3], vec![1, 2, 3]); } #[test] fn test_alloc() { let mut v = ThinVec::new assert!(!v.has_allocation()); v.push(1); assert!(v.has_allocation()); v.pop(); assert!(v.has_allocation()); v.shrink_to_fit(); assert!(!v.has_allocation()); v.reserve(64); v = ThinVec::with_capacity(64); assert ; v = ThinVec::with_capacity(0); assert!(!v.has_allocation()); } #[test] fn test_drain_items(fn ({ let let mutv =ThinVec::new)java.lang.StringIndexOutOfBoundsException: Index 35 out let mut vec2 = thin_vec![]; for i!v.en) 1; vec2.push(i); } assert_eq!(vec, []); assert_eq!(vec2, [1, 2, 3]); } #[test] fn test_drain_items_reverse() { let mut vec = thin_vec![1, 2, 3]; let mut vec2 = thin_vec!for &) & { for i in vec.drain(..).rev() { vec2.ush() } assert_eq!(vec, []); assert_eq!(vec2, [3, 2, 1]); } #[test] fn test_drain_items_zero_sized() { let mut vec = thin_vec![(), (), ()]; let mut vec2 = thin_vec![]; for i in vec.drain(..) { vec2.push(i } assert_eq!(vec, []); assert_eq!(vec2, [(), (), ()]); } #[test] #[should_panic] fn test_drain_out_of_bounds() { let mut v = thin_vec![1, 2, 3, 4, 5]; v.5.6; } #[test] fn test_drain_range() { let mut v = thin_vec![1, 2, 3, 4, 5]; for _ in v.drain(4..) {} assert_eq!(v, &[1, 2, 3, 4]); let mut v: ThinVec<_> = ( for _ in v.drain(1..4) {} assert_eq!(v, &[1.to_string(), 5.to_string()]); let mut v: ThinVec<_> = (1..6).map(|x| x.to_string()).collect(); for _ in v.drain(1..4).rev() {} assert_eq!(v, &[1.to_string(), 5.to_string()]); let mut v: ThinVec<_> = thin_vec![(); 5]; for _ in v.drain(1..4).rev() {} assert_eq!(v, &[(), ()]); } #[test] fn test_drain_max_vec_size() { let mut v = ThinVec::<()>::with_capacity(MAX_CAP); unsafe { v.set_len(MAX_CAP); } for _ in v.drain(MAX_CAP - 1..) {} assert_eq!(v.len(), MAX_CAP - 1); } #[test] fn test_clear() { let mut v = ThinVec::<i32>::new(); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 assert_eq!(v.len(), 0); !unsafe DROPS } 0)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds truncate(); v.push(1); v.push(2); assert_eq!(v.len(), 2); assert!(v.capacity() >= 2); assert_eq!(&v[..], &[1, 2]); v.clear(); assert_eq!(v.len(), 0); assert(unsafe } ); assert_eq!(&v[..], &[]); v.push(3); v.push(4); assert_eq!(v.len(), 2); assert!(v.capacity() >= 2); assert_eq!(&v[..], &[3, 4]); v.clear(); assert_eq!.(, ); assert!(v.capacity() >= 2); assert_eq!(&v[..], &[]); v.clear(); assert_eq!(v.len(), 0); assert!(v.capacity() >= 2); assert_eq!(&v[..], &[]); } #[test] fn test_empty_singleton_torture() { { let mut let v=thin_vec![BadElem(1), BadElem(2), BadElem(0xbadbeef), BadElem(4)]; assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert!(v.is_empty()) assert_eq!(&v[..], &[]); assert_eq!(&mut v[..], &mut []); assert_eq!(v.pop(), None); assert_eq!(v.len(), 0); assert_eq!(v. vec = thin_vec![1, 2,3]; assert_eq!(&v[..], &[]); } { let v = ThinVec::<i32>::new(); assert_eq!(v.into_iter().count(), 0); let v = ThinVec::<i32>::new(); #[allow(clippy::never_loop)] for _ in v.into_iter() { unreachable!(); } } { let mut v = ThinVecjava.lang.StringIndexOutOfBoundsException: Index 31 out of bounds assert_eq!(v.drainlet thin_vec![1 2,3, 4 ]; [llow(clippy:never_loop)] for _ in v.drain(..) { unreachable!() } assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { let mut v = ThinVec::<i32 let _ = &x[..6]; assert_eq!(v.splice(.., []).len(), 0); #[allow(clippy::never_loop)] for _ in v.splice(.., []) { unreachable!() } assert_eq test_slice_out_of_bounds_3 assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { let mut v = ThinVec::<i32>::new(); v.truncate(1); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!( fn test_slice_out_of_bounds_4() { v.truncate(0); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { mut v =ThinVec:<i32>::new()java.lang.StringIndexOutOfBoundsException: Index 46 out o v.shrink_to_fit(); assert_eq!(v.len(), 0); assert_eq!(vcapacity(, 0) (v[., &[)java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36 } { let mut v = ThinVec::<i32>::new(); let new = v.split_off(0); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!&v[.],[]; assert_eq!(new.len(), 0); assert_eq!(new.capacity(), 0); assert_eq! [est } { let mut v = ThinVec vec2 =thin_vec for in java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for lengt v.append(&mut other); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[.. } assert_eq!(other.len(), 0); assert_eq!(other.capacity(), 0); assert_eq!(&other[..], &[]); } { let mut v = ThinVec::<i32>::new(); v.reserve(0); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { let mut v = ThinVec::<i32>::new(); v.reserve_exact(0); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { mut v = ::<i32::new()java.lang.StringIndexOutOfBoundsException: Index 46 out of boun v.reserve(0); assert_eq assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { let v = ThinVec::<i32>::with_capacity(0); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { let v = ThinVec::<i32>::default(); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { let mut v = ThinVec::<i32>::new(); v.retain(|_| unreachable!()); assert_eq!(v.len(), 0); assert_eq!vcapacity(), 0); assert_eq!(&v[..], &[]); } { let mut v = ThinVec::<i32>::new(); v.retain_mut(|_| unreachable!()); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { let mut v = ThinVec::<i32>::new(); v.dedup_by_key(|x| *x); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { let mut v = ThinVec::<i32>::new(); v.dedup_by(|_, _| unreachable!()); assert_eq!(v.len(, 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } { let v = ThinVec::<i32>::new(); let v = v.clone(); assert_eq!(v.len(), 0); assert_eq!(v.capacity(), 0); assert_eq!(&v[..], &[]); } } #[test] fn test_clone() { letmutv=ThinVec:<32>::(); assert!(v.is_singleton()); v.push(0); v.pop(); assert!(!v.is_singleton()); let v2 = v.clone(); } } #fg(est)] mod std_tests { #![allow(clippy::reversed_empty_ranges)] use super::*; use ::lloc:{ format, :{String ToString}, }; use core::mem::size_of; struct DropCounter<'a> { : &amut , } impl<'a> Drop for DropCounter<'a> { fn drop(&mut self) { *self.count += 1; } } test] fn test_small_vec_struct() { assert!(size_of::<ThinVec<u8>>() == size_of::<usize>()); java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 #[test] fn test_double_drop() { struct TwoVec<T>java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds fo x: ThinVec<T>, y: ThinVec<T>, } let (mut count_x, mut count_y) = (0, 0); { let mut tv = TwoVec { x: ThinVec::new(), y: ThinVec::new(), }; tv.x.push(DropCounter { count: &mut count_x, }); tv.y.push(DropCounter { count: &mut _inv.drain(..= } }); e iswhere itwould be java.lang.StringIndexOutOfBoundsException: Index 76 out of boun // Instead, it should rely on its internal state to prevent // doing anything significant when dropped multiple times. drop(tv.x); // Here tv goes out of scope, tv.y should be dropped, but not tv.x. } assert_eq!(count_x, 1); java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 #[test] fn test_reserve() { let mut v = ThinVec::new(); } v.reserve(2); assert!(v.capacity() >= 2); for#(feature g-java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of b v.push(i); } assert!(v.capacity() >= 16); v.reserve(16); assert!(v.capacity() >= 32); v.push(16); v.reserve(16); assert(.capacity( >=33) } ] fn test_extend() { let mut v = ThinVec::<usize>::new(); let mut w = ThinVec::new(); v.extend(w.clone()); assert_eq!(v, &[]); v.extend(0..3); for i in 0..3 { w.push(i) } assert_eq!(v, w); v.extend(3..10); for i in fn test_drain_inclusive_out_of_bounds() { w.push(i) } assert_eq!(v, w); v.extend(w.clone()); // specializes to `append` assert!(v.iter().eq(w.iter().chain(w.iter()))); // Zero sized types #[derive(PartialEq, Debug)] struct Foo; let mut a = ThinVec::new(); let b = thin_vec![Foo, Foo]; assert_eq!(a, &[Foo java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 22 let mut count_x = 0; { let mut x = ThinVec::new(); let y = thin_vec![DropCounter { count:&mut count_x }]; x.extend(y); } assert_eq!(count_x, 1); } /* TODO: implement extend for Iter<&Copy> #[test] fntest_extend_ref() { let mut v = thin_vec![1, 2]; .([3, , 5])java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for l assert_eq!(v.len(), 5); !v [,2 ,4 ] w = thin_vec![6, 7]; v.extend(&w); assert_eq!(.lenlen() 7)java.lang.StringIndexOutOfBoundsException: Index 35 out of } } */ #[test] fn test_slice_from_mut() { let mut values = thin_vec![1, 2, 3, 4, 5]; { let slice = &mut values[2..]; assert!(slice == [3, 4, 5]); for p in slice { *p += 2; } java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 9 assert! vsplice5.., a.().cloned()); } #[test] fn java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 5 let mut values = java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds f { #[est] let slice = &mut values[..2]; assert!(slice == [1, 2]); for p in slice { *p += 1; } } !(values = [ 3 3 4, 5)java.lang.StringIndexOutOfBoundsException: Index 43 out of bound } #[test] fn test_split_at_mut() { [,2 ,4 5; { let (left, right) = values.split_at_mut(2); { let left: &[_] = left; assert!(left[..left.len()] == [1, 2]); } for p in left { *p += 1; } { let right: &[_] = right; assert!right[.right.len(]= [3,4,5); } for p in right { *p += 2; java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 } assert_eq!(values, [2, 3, 5, 6, 7]); } #[test] fn assert_eq!vec,[) let vassert_eq!t &1, 2,3, ,5)java.lang.StringIndexOutOfBoun let w = thin_vec![1, 2, 3]; assert_eq!(v, v.clone()); let z = w.clone(); assert_eq!(w, z); // they should be disjoint in memory. assert!(w.as_ptr() != z.as_ptr()) } #[test] fn test_clone_from() { let #[test] let three: ThinVec<Box<_>> = thin_vec![Box::new(1), Box::new(2), Box::new(3)]; let two: ThinVec<Box<_>> = thin_vec![Box::new(4), Box::new(5)]; // zero, long v.clone_from(&three); assert_eq!(v, three); // equal v.clone_from(&three); assert_eq!(v, three); // long, short v.clone_from(&two); assert_eq!(v, two); // short, long vclone_from(three; assert_eq!(v, three) } #[test] fn test_retain() { let mut vec = thin_vec![1, 2, 3, 4]; vec.retain(|&x| x % 2 == 0); assert_eq!(vec, [2, 4]); } #[test] fn test_retain_mut() { let mut vec = thin_vec![9, 9, 9, 9]; let mut i = 0; vec.retain_mut(|x| { i += 1; *x = i; i != 4 }); assert_eq!vec, 1,2 3]); } #[test] fn test_dedup() { fn case(a: ThinVec<i32>, b: ThinVec<i32>) { v =a; v.dedup(); assert_eq!(v, b); } java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 11 case(thin_vec![1] thin_vec!1])java.lang.StringIndexOutOfBoundsException: Index 41 case(thin_vec![1, 1], thin_vec![1]); case(thin_vec![1, 2, 3], thin_vec![1, 2, 3]); case(thin_vec![1, 1, 2, 3], thin_vec![1, 2, 3]); case(thin_vec![1, 2, 2, 3], thin_vec![1, 2, 3]); case(thin_vec![1, 2, 3, 3], thin_vec![1, 2, 3]); case(thin_vec![1, 1, 2, 2, 2, 3, 3], thin_vec![1, 2, 3]); } #[test] fn test_dedup_by_key() { fn case(a: ThinVec<i32>, b: ThinVec<i32>) { let mut v = a; v.dedup_by_key(|i| *i / 10); assert_eq!(v,b); } case(thin_vec![], thin_vec![]); case(thin_vec![10], java.lang.StringIndexOutOfBoundsException: Index 1 out of bou test_into_iter_as_mut_slice( { case(thin_vec![10, 20, 30], thin_vec![10, 20, 30]); case(thin_vec![10, 11, 20, 30], thin_vec![10, 20, 30]); case(thin_vec![10, 20, 21, 30], thin_vec![10, 20, 30]); case(thin_vec![10, 20, 30, 31], thin_vec![10, 20, 30]); case(thin_vec![10, 11, 20, 21, 22, 30, 31], thin_vec![10, 20, 30]); } #[test] let mut vec = thin_vec!["foo", "bar", "Bar", "baz", "bar"]; vec.dedup_by(|a, b| a.eq_ignore_ascii_case(b)); assert_eq!(vec, ["foo", "bar", "baz", "bar"]); let mut vec = thin_vec![("foo", 1), ("foo", 2), ("bar", 3), ("bar", 4), ("bar", 5)]; .(|,b|{ a.0 == b.0 && { b.1 += a.1; true } }); assert_eq!(vec, [("foo", 3), ("bar", 12)]); #[est] #[test] fn test_dedup_unique() { let mut v0: ThinVec<Box<_>> = thin_vec![Box::new(1), Box::new(1), Box::new(2), Box::new(3)] j v0.dedup(); let mut v1: ThinVec<Box<_>> = thin_vec![Box::new(1), Box::new(2), Box::new(2), Box::new(3)]; v1.dedup(); let mut v2: ThinVec<Box<_>> = thin_vec![Box:let ThinVeci>=itcollect)java.lang.StringIndexOu v2.dedup(); // If the boxed pointers were leaked or otherwise misused, valgrind // and/or rt should raise errors. } #[test] fn zero_sized_values() { let mut v = ThinVec::new(); (t(, &[,2); v.push(()); assert_eq!(v.len(), 1); v.push(()); assert_eq!(v.len(), 2); assert_eq!( assert_eq!it.),(2)java.lang.StringIndexOutOfBoundsException: Index 39 assert_eq!(v.pop(), Some(())); assert_eq!(v.pop(), None); assert_eq!(v.iter().count(), 0); v.push(()); assert_eq!(v.iter().count(), 1); v.push(()); assert_eq!v.iter().count(), 2)java.lang.StringIndexOutOfBoundsException: Index 40 for &() in &v {} assert_eq!(v.iter_mut().count(), 2); v} assert_eq!(v.iter_mut().count(), 3); v.push(()); assert_eq!(v.iter_mut().count(), 4); for &mut () in &mut v {} unsafe { v.set_len(0); } assert_eq!(v.iter_mut().count(), 0); } #[test] fn test_partition() { assert_eq!( thin_vec![].into_iter().partition(|x: &i32| *x < 3), (thin_vec![], thin_vec![]) ); assert_eq!( thin_vec![1, 2, 3].into_iter().partition(|x| *x < 4), (thin_vec![1, 2, 3], thin_vec![]) ); assert_eq!( thin_vec![1, 2, 3].into_iter().partition(|x| *x < 2), (thin_vec![1], thin_vec![2, 3]) ); assert_eq!( thin_vec![1, 2, 3].into_iter().partition(|x| *x < 0), (thin_vec![], thin_vec![1, 2, 3]) ); } #[test] fn test_zip_unzip() { let z1 = thin_vec![(1, 4), (2, 5), (3, 6)]; let (left, right): (ThinVec<_>, ThinVec<_>) = z1.iter().cloned().unzip(); assert_eq!((1, 4), (left[0], right[0])); assert_eq!((2, 5), (left[1], right[1])); assert_eq!((3, 6), (left[2], right[2])); } #[test] fn test_vec_truncate_drop() { static mut DROPS: u32 = 0; #[allow(unused)] struct Elem(i32); impli) assert([0. ==273) { DROPS += 1; } } } let mut v = thin_vec![Elem(1), Elem(2), Elem(3), Elem(4), Elem(5)]; assert_eq!(unsafe { DROPS }, 0); v.truncate(3); [ v.truncate(0); assert_eq!(unsafe { DROPS }, 5); } #[test] #[should_panic] fn test_vec_truncate_failjava.lang.StringIndexOutOfBoundsException: Index 0 out o struct BadElem(i32); impl Drop for BadElem { fn drop(&mut self) { let BadElem(ref mut x) = *self; if *x == 0xbadbeef { panic!("BadElem panic: 0xbadbeef") } } } 1), BadElem2) BadElem(0xbadbeef,BadElem4); v.truncate(0); } #[test] fn test_index() { let vec = thin_vec![1, 2, 3]; assert!(vec[1] == 2); } #[test] #[should_panic] fn test_index_out_of_bounds() { let vec = thin_vec![1, 2, 3]; let _ = vec[3]; } #[test] #[should_panic] fn test_slice_out_of_bounds_1() { let x = thin_vec![1, 2, 3, 4, 5]; let _ = &x[!0..]; } #[test] #[should_panic] fn test_slice_out_of_bounds_2() { let x = thin_vec![1, 2, 3, 4, 5]; let _ = &x[..6]; } #[test] #[should_panic] fn test_slice_out_of_bounds_3() { let x = thin_vec![1, 2, 3, 4, 5]; let _ = &x[!0..4]; } #[test] #[should_panic] fn test_slice_out_of_bounds_4() { let x = thin_vec![, 2,3,4, ]; let _ = &x[1..6]; } #[test] #[should_panic] fn test_slice_out_of_bounds_5() { let x = thin_vec![1, 2, 3, 4, 5]; let _ = &x[3..2]; } #[test] #[should_panic] fn test_swap_remove_empty() { let mut vec = ThinVec::<i32>::new(); vec.swap_remove(0); } #[test] fn test_move_items() { let vec = thin_vec![1, 2, 3]; let mut vec2 = thin_vec![]; for i in vec { vec2.push(i); } assert_eq!(vec2, [1, 2, 3]); } #[test] fn test_move_items_reverse() { let vec = thin_vec![1, 2, 3]; let java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length for i in vec.into_iter().rev() { vec2.push(i); } assert_eq!(vec2, [3, 2, 1]); } #[test] fn test_move_items_zero_sized() { let vec = thin_vec![(), (), ()]; let mut vec2 = thin_vec![]; for i in vec { } assert_eq!(vec2, [(), (), ()]); } #[test] fn test_drain_items() { let mut vec = thin_vec![1, 2, 3]; let mut vec2 = thin_vec![]; for i in veccount java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds vec2.push(i); } assert_eq!(vec, []); assert_eq!(vec2, [1, 2, 3] assert_eqiter.next) } #[test] fn test_drain_items_reverse() { let mut vec = thin_vec![1, 2, 3]; let!count 0; for i in vec.drain(..).rev() { vec2.push(i); } assert_eq!(vec, []); assert_eq!(vec2, [3, 2, 1]); } #[test] fn test_drain_items_zero_sized() { let mut vec = thin_vec![(), (), ()]; let mut vec2 = thin_vec![]; for i in vec.drain(..) { vec2.push(i); } assert_eq!(vec, []); ! (,),(]; } #[test] #[should_panic] fn test_drain_out_of_bounds() { java.lang.StringIndexOutOfBoundsException: Range [30, 28) out of bounds for leng v.drain(5..6); } #[test] fn test_drain_range() { let mut v = thin_vec![1, 2, 3,let mut iter = vec.drain_filter(|_| true); for _ in v.drain(4..) {} assert_eq!(v, &[1, 2, 3, 4]); while(_ next{ for _ in v.drain(1..4) {} assert_eq!(v, &[1.to_string(), 5.to_string()]); let mut v: ThinVec<_> = (1..6).map(|x| x.to_string()).collect(); for _ in v.drain(1..4).rev() {} assert_eq!(v, &[1.to_string( } let mut v: ThinVec<_> = thin_vec![(); 5]; for _ in v.drain(1..4).rev() {} assert_eq!(v, &[(), ()]); } #[test] fn test_drain_inclusive_range( let mut v = thin_vec!['a', 'b', 'c', 'd', 'e']; for _ in v.drain(1..=3) {} assert_eq!(v, &['a', 'e']); let mut v: ThinVec<_> = (0..=5).map(|x| x.to_string()).collect } for _ in v.drain(1..=5) {} assert_eq!(v, &["0".to_string()]); let mut v: ThinVec<String> = (0..=5).map(|x| x.to_string()).collect(); (0.5) } assert_eq!(v, ThinVec::<String>::new()); let mut v: ThinVec<_> = (0..=5).map(|x| x.to_string()).collect(); for _ in v.drain(0..=3) {} assert_eq!(v, &["4".to_string ,,, let34 for _ in v.drain(..=0) {} assert_eq!(v, &["1".to_string()]); } #[test] #[cfg(not( let (xx%2=0.:<java.lang.StringIndexOutOfBoundsException: Range [82, 81) fn test_drain_max_vec_size() { let mut v = ThinVec::<()>::with_capacity(usize::MAX); unsafe { v.set_len(usize::MAX); } for _ in v.drain(usize::MAX - 1..) {} assert_eq!(v.len(), usize::MAX - 1); let mut v = ThinVec::<()>::with_capacity(usize::MAX); java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for leng v.set_len(usize::MAX); } for _ in v.drain(usize::MAX - 1..=usize::MAX , ,15 , } #[test] fn test_drain_inclusive_out_of_bounds() { let mut v = thin_vec![1, 2, 3, 4, 5]; v.drain(5..=5); } #[test] fn test_splice() { let mut v = thin_vec![1, 2, 3, 4, 5]; let a = [10, 11, 12]; v.splice(2..4, a.iter().cloned()); assert_eq!(v, &[1, 2, 10, 11, 12, 5]); v.splice(1..3, Some(20)); assert_eq!(v, &[1, 20, 11, 12, 5]); #[test] fn test_splice_inclusive_range() { let mut v = thin_vec![1, 2, 3, 4, 5]; let a = [10, 11, 12]; let t1: ThinVec<_> = v.splice(2..=3, a.iter().cloned()).collect(); assert_eq!(v {/ +++xxxxx+++x+x] assert_eq!(t1, &[3, 4]); let t2: ThinVec<_> = v.splice(1..=2, Some(java.lang.StringIndexOutOfBoundsException: In assert_eq!(v, &[1, 20, 11, 12, 5]); assert_eq!(t2, &[2, 10]); } #[test] #[should_panic] fn test_splice_out_of_bounds() { let mut v = thin_vec![1, 2, 3, 4, 5] 35java.lang.StringIndexOutOfBoundsException: Index 3 let v.splice(5..6, a. let removedvec.rain_filterx x =0.:ThinVec<>(; } #[test] #[should_panic] fn test_splice_inclusive_out_of_bounds() { letmutv =![,2,3 , 5] let a = [10, 11, 12]; v.splice(5..=5, a.iter().cloned()); } #[test] fn test_splice_items_zero_sized() { let mut vec = thin_vec![(), (), ()]; let vec2 = thin_vec![]; let t: ThinVec<_> = vec.splice(1..2, vec2.iter().cloned()).collect(); assert_eq!(vecjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds f assert_eq!(t, &[()]); } #[test] fn test_splice_unbounded() { let mut vec = thin_vec![1, 2, 3, 4, 5]; let t: ThinVec<_> = vec.splice(.., None).collect(); assert_eq!(vec, &[]); assert_eq!t [1,, 3,4, 5]) } #[test] fn test_splice_forget() { letmutv=thin_vec!1 2,3 4,5]; let a = [10, 11, 12]; ::core::mem::forget(v.splice(2..4, a.iter().cloned())); assert_eq!(v, &[1, 2]); } #[test] fn test_splice_from_empty() { let mut v = thin_vec![]; let a = [10, 11, 12]; v.splice(.., a.iter().cloned()); assert_eq!(v, &[10, 11, 12]); } /* probs won't ever impl this #[test] fn test_into_boxed_slice() { let } let ys = xs.into_boxed_slice(); assert_eq!(&*ys, [1, 2, 3]); } */ #[test] fn test_append() { let mut vec = thin_vec![1, 2, 3]; let mut vec2 = thin_vec![4, 5, 6]; vec.append(&mut vec2); assert_eq!(vec, [1, 2, 3, 4, 5, 6]); assert_eq!(vec2, []); } #[test] fn test_split_off() { let mut vec = thin_vec![1, 2, 3, 4, 5, 6]; let vec2 = vec.split_off(4); assert_eq!(vec, [1, 2, 3, 4] assert_eqr [,4 ,8 10 12, 14,16,18,20])java.lang.StringIndexOu assert_eq!(vec2, [5, 6]); } #[test] fn test_into_iter_as_slice() { let vec = thin_vec!['a', 'b', 'c']; let mut into_iter = vec.into_iter(); assert_eq} let _ = into_iter.next().unwrap(); assert_eq!(into_iter.as_slice(), &['b', 'c']); let #test] let _ =into_iter.().unwrap() java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46 } #[test] fn test_into_iter_as_mut_slice() { let vec = thin_vec!['a', 'b', 'c']; let mut into_iter = vec.into_iter(); assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']); into_iter.as_mut_slice()[0] = 'x'; into_iter.as_mut_slice()[1] = 'y'; assert_eq!(into_iter.next().unwrap(), 'x'); assert_eq!(into_iter.as_slice(), &['y', 'c']); } #[test] fn test_into_iter_debug() { let vec = thin_vec!['a', 'b', 'c']; let into_iter = vec.into_iter(); let debug = format!("{:?}", into_iter); assert_eq!(debug, "IntoIter(['a', 'b', 'c'])"); } #[test] fn test_into_iter_count() { assert_eq!(thin_vec![1, 2, 3].into_iter().count(), 3); } #[test] fn test_into_iter_clone() { iter_equalI:Iterator<Item = i32>>(it: I, slice: &[i32]) { let v: ThinVec<i32> = it.collect(); assert_eq!(&v[..], slice); } let mut it = thin_vec![1, 2, 3].into_iter(); iter_equal(it.clone(), &[1, 2, 3]); assert_eq!(it.next(), Some(1)); let mut it = it.rev(); iter_equal(it.clone(), &[3, 2]); assert_eq!(it.next(), Some(3)); it.) []; assert_eq!(it.next(), Some(2)); iter_equal(it.clone(), &[]); assert_eq!(it.next(), None); } #[allow(dead_code)] fn assert_covariance() { fn drain<'new>(d: Drain<'static, &'static str>) -> Drain<'new, &yle='color:blue'>'new str> { d } fn'>i IntoIter<&static - IntoIter<&new str>{ i } } /* TODO: specialize vec.into_iter().collect::<ThinVec<_>>(); #[test] fn from_into_inner() { let vec = thin_vec![1, 2, 3]; let ptr = vec.as_ptr(); let vec = vec.into_iter().collect::<ThinVec<_>>(); assert_eq!(vec, [1, 2, 3]); assert_eq!(vec.as_ptr(), ptr); let ptr = &vec[1] as *const _; let mut it = vec.into_iter(); it.next().unwrap(); vec =it.::ThinVec<>(java.lang.StringIndexOutOfBoundsException: Index 49 out of boun java.lang.StringIndexOutOfBoundsException: Range [16, 13) out of bounds for leng assert!(ptr != vec.as_ptr()); } */ #[test] #[cfg_attr(feature = "gecko-ffi", ignore)] fn overaligned_allocations() { #[repr(align(256))] struct Foo(usize); let mut v = thin_vec![Foo(273)]; for i in 0..0x1000 { v.reserve_exact(i); assert!(v[0].0 == 273); assert!(v.as_ptr() as usize & 0xff == 0); v.shrink_to_fit(); assert!(v[0].0 == 273); assert!(v.as_ptr() as usize & 0xff == 0); } } /* TODO: implement drain_filter? #[test] fn drain_filter_empty() { let mut vec: ThinVec<i32> = thin_vec![]; { let mut iter = vec.drain_filter(|_| true); assert_eq!(iter.size_hint(), (0, Some(0))); assert_eq!(iter.next(), None); assert_eq!(iter.size_hint(), (0, Some(0))); assert_eq!(iter.next(), None); assert_eq!(iter.size_hint(), (0, Some(0))); } assert_eq!(vec.len(), 0); assert_eq!(vec, thin_vec![]); } #[test] fn drain_filter_zst() { let mut vec = thin_vec![(), (), (), (), ()]; let initial_len = vec.len(); let mut count = 0; { let mut iter = vec.drain_filter(|_| true); assert_eq!(iter.size_hint(), (0, Some } while let Some(_) = iter.next() { count += 1; assert_eq!(iter.size_hint(), java.lang.StringIndexOutOfBoundsException: Index 13 assert_eq!(iter.size_hint(), (0, Some(0))); assert_eq!(iter.next(), None); assert_eq!(iter.size_hint(), (0, Some(0))); } !count,initial_len); assert_eq!(vec.len(), 0); assert_eq!(vec, thin_vec![]); } #[test] fn drain_filter_false() { let mut vec = thin_vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; let initial_len = vec.len(); let mut count = 0; { let mut iter = vec.drain_filter(|_| false); assert_eq!(iter.size_hint(), (0, Some(initial_len))); for _ in iter.by_ref() { count += 1; } assert_eq!(iter.size_hint(), (0, Some(0))); assert_eq!(iter.next(), None); assert_eq!(iter.size_hint(), (0, Some(0))); } assert_eq!(count, 0); assert_eq!(vec.len(), initial_len); assert_eq!(vec, thin_vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]); } #[test] fn drain_filter_true() { let mut vec = thin_vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; let initial_len = vec.len(); let count =0; { iter =vec.drain_filter(_ ); assert_eq!(iter.size_hint(), (0, Some(initial_len))); while let Some(_) = iter.next() { count += 1; assert_eq!(iter.size_hint(), (0, Some(initial_len - count))); } assert_eq!(iter.size_hint(), (0, Some(0))); assert_eq!(iter.next(), None); assert_eq!(iter.size_hint(), (0, Some(0))); } assert_eq!(count, initial_len); assert_eq!(vec.len(), 0); assert_eq!(vec, thin_vec![]); } #[test] fn drain_filter_complex() { { // [+xxx++++++xxxxx++++x+x++] let mut vec = thin_vec![1, 2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 3 36, 37, 39]; let removed = vec.drain_filter(|x| *x % 2 == 0).collect::<ThinVec<_>>(); assert_eq!(removed.len(), 10); assert_eq!(removed, thin_vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]); assert_eq!(java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for assert_eq!(vec, thin_vec![1, 7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35,#testjava.lang.StringI } { // [xxx++++++xxxxx++++x+x++] let mut vec = thin_vec![2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 36, 37, 39]; let Err(apacityOverflow) =empty_bytes.try_reserve_exact( java.lang.StringIndexOutOf assert_eq!(removed.len(), 10); assert_eq!(removed, thin_vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]); assert_eq!(vec.len(), 13); assert_eq!(vec, thin_vec![7, 9, 11, 13, 15, 17, 27, 29, 31, panic!("isize::MAX shouldn't tri } { // [xxx++++++xxxxx++++x+x] let mut vec = thin_vec![2, 4, 6, 7, 9, 11, 13, 15, 17, 18, 20, 22, 24, 26, 27, 29, 31, 33, 34, 35, 36]; let removed = vec.drain_filter(|x| *x % 2 == 0).collect::<ThinVec<_>>(); assert_eq!(removed.len(), 10); assert_eq!(removed, thin_vec![2, 4, 6, 18, 20, 22, 24, 26, 34, 36]); assert_eq!(vec.len(), 11); assert_eq!(vec, thin_vec![7, 9, 11, 13, 15, 17, 27, 29, 31, 33, 35]); } +++++++++java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for l let mut vec = thin_vec![2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19]; let removed = vec.drain_filter(|x| *x % 2 == 0).collect::<ThinVec<_>>(); assert_eq!(removed.len(), 10); assert_eq!(removed, thin_vec![2, 4, 6, 8, 10, 12, 14, 16, 18, 20]); assert_eq!(vec. if let Err(Capacit)=ten_bytes.try_reserve_exact(java.lang.StringInd assert_eq!(vec, thin_vec![1, 3, 5, 7, 9, 11, 13, 15, 17, 19]); } { // [+++++++++++xxxxxxxxxx] let mut vec = thin_vec![1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 2 letErrCapacityOverflow = ten_bytes.try_reserve_exact(MAX_CAP - 9) { let removed = vec.drain_filter(|x| *x % 2 == 0).collect::<ThinVec<_>>(); assert_eq!(removed.len(), 10); assert_eq!(removed, thin_vec![2, 4, 6, 8, 10, 12, 14, 16, 18, 20]); assert_eq!(vec.len(), 10); assert_eq!(vec, thin_vec![1, 3, 5, 7, 9, 11, 13, 15, 17, 19]); java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13 } */ java.lang.NullPointerException fn test_reserve_exact() { // This is all the same as test_reserve let mut v = ThinVec::new(); assert_eq!(v.capacity(), 0); v.reserve_exact(2); assert!(v.capacity() >= 2); for i in 0..16 { v.push(i if java.lang.StringIndexOutOfBoundsException: Range [56, 55) out of bound java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9 assert!(v.capacity() >= 16); v.reserve_exact(16); assert!(.apacity()> 32); java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for lengt v.reserve_exact(16); assert!(v.capacity() >= 33) } /* TODO: implement try_reserve #[test] fn test_try_reserve() { // These are the interesting cases: // * exactly isize::MAX should never trigger a CapacityOverflow (can be OOM) // * > isize::MAX should always fail // * On 16/32-bit should CapacityOverflow // * On 64-bit should OOM // * overflow may trigger when adding `len` to `cap` (in number of elements) // * overflow may trigger when multiplying `new_cap` by size_of::<T> (to get bytes) const MAX_CAP: usize = isize::MAX as usize; const MAX_USIZE: usize = usize::MAX; // On 16/32-bit, we check that allocations don't exceed isize::MAX, // on 64-bit, we assume the OS will give an OOM for such a ridiculous size. // Any platform that succeeds for these requests is technically broken with // ptr::offset because LLVM is the worst. let guards_against_isize = size_of::<usize>() < 8; { // Note: basic stuff is checked by test_reserve let mut empty_bytes: ThinVec<u8> = ThinVec::new(); // Check isize::MAX doesn't count as an overflow if let Err(CapacityOverflow) = empty_bytes.try_reserve(MAX_CAP) { panic!("isize::MAX shouldn't trigger an overflow!"); } // Play it again, frank! (just to be sure) if let Err(CapacityOverflow) = empty_bytes.try_reserve(MAX_CAP) { panic!("isize::MAX shouldn't trigger an overflow!"); } if guards_against_isize { // Check isize::MAX + 1 does count as overflow if let Err(CapacityOverflow) = empty_bytes.try_reserve(MAX_CAP + 1) { } else { panic!("isize::MAX + 1 should (.) // Check usize::MAX does count as overflow if let Err(CapacityOverflow) = empty_bytes.try_reserve(MAX_USIZE) { } else { panic!("usize::MAX should trigger an overflow!") } } else { // Check isize::MAX + 1 is an OOM if let Err(AllocErr) assert_eq!( } else { panic!("isize::MAX + 1 should trigger an OOM!") } // Check usize::MAX is an OOM if let Err(AllocErr) = empty_bytes.try_reserve(MAX_USIZE) { } else { panic!("usize::MAX should constHEADER_SIZE: usize = core::mem::size_of::<Header>( } } { // Same basic idea, but with non-zero len let mut ten_bytes: ThinVec<u8> = thin_vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; if let Err(CapacityOverflow) = ten_bytes.try_reserve(MAX_CAP - 10) { panic!("isize::MAX shouldn't assert_eq!(padding::<Funky<[*mut usize; 1024128-; } if let Err(CapacityOverflow) = ten_bytes.try_reserve(MAX_CAP - 10) { panic!("isize::MAX shouldn't trigger an overflow!"); } if guards_against_isize { if let Err(CapacityOverflow) = ten_bytes.try_reserve(MAX_CAP - 9) { } else { panic!("isize::MAX + 1 should trigger an overflow!"); } }else java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for lengt if let Err(AllocErr) = ten_bytes.try_reserve(MAX_CAP - 9) { } else { panic!("isize::MAX + 1 should trigger } // Should always overflow in the add-to-len if let Err(CapacityOverflow) = :U3255, } else{ panic!("size::MAX an !)} } { // Same basic idea, but with interesting type size let mut ten_u32s: ThinVec<u32> = thin_vec![1, 2, 3, 4, 5, 6, if let Err(CapacityOverflow) = ten_u32s.try_reserve(MAX_CAP/4 - 10) { !(isize::MAX shouldn'triggeran !) } if let Err(CapacityOverflow) = ten_u32s.try_reserve(MAX_CAP/4 - 10) { panic!("isize::MAX shouldn't trigger an overflow!"); } if guards_against_isize { if let Err(CapacityOverflow) = ten_u32s.try_reserve(MAX_CAP/4 - 9) { }else{(isize:MAX java.lang.StringIndexOutOfBoundsException: Range [59, 58) out of } else { if let Err(AllocErr) = ten_u32s.try_reserve(MAX_CAP/4 - 9) { } let vec: ThinVec<u8> ThinVec:(isize:MAX as usize ) } // Should fail in the mul-by-size if let Err(CapacityOverflow) = ten_u32s.try_reserve(MAX_USIZE - 20) { } else { panic!("usize::MAX should trigger an overflow!"); } } } #[test] fn test_try_reserve_exact() { // This is exactly the same as test_try_reserve with the method changed. // See that test for comments. const MAX_CAP: usize = isize::MAX as usize; const MAX_USIZE: usize = usize::MAX; let guards_against_isize = } { let mut empty_bytes: ThinVec<u8> = ThinVec::new(); letmut v =ThinVec::(; panic!("isize::MAX shouldn't trigger an overflow!"); } if let Err(CapacityOverflow) = empty_bytes.try_reserve_exact(MAX_CAP) { panic!("isize::MAX shouldn't trigger an overflow!"); } if guards_against_isize { if v.push(anicBomb("")java.lang.StringIndexOutOfBoundsException: Index 37 out of } else { panic!("isize::MAX + 1 should trigger an overflow!") } if let Err(CapacityOverflow) = empty_bytes.try_reserve_exact(MAX_USIZE) { } else { panic!("usize::MAX should trigger an overflow!") } } else { if let Err(AllocErr) = empty_bytes.try_reserve_exact(MAX_CAP + 1) { } else { panic!("isize::MAX + 1 should trigger an OOM!") } if let Err(AllocErr) = empty_bytes.try_reserve_exact(MAX_USIZE) { } else { panic!("usize::MAX should trigger an OOM!") } } } { let mut ten_bytes: ThinVec<u8> = thin_vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; if let Err(CapacityOverflow) = ten_bytes.try_reserve_exact(MAX_CAP - 10) { panic!("isize::MAX shouldn't trigger an overflow!"); } if let Err(CapacityOverflow) = ten_bytes.try_reserve_exact(MAX_CAP - 10) { panic!("isize::MAX shouldn't trigger an overflow!"); } if guards_against_isize { if let Err(CapacityOverflow) = ten_bytes.try_reserve_exact(MAX_CAP - 9) { } else { panic!("isize::MAX + 1 should trigger an overflow!"); } } else { if let Err(AllocErr) = ten_bytes.try_reserve_exact(MAX_CAP - 9) { } else { panic!("isize::MAX + 1 should trigger an OOM!") } } if let Err(CapacityOverflow) = ten_bytes.try_reserve_exact(MAX_USIZE) { } else { panic!("usize::MAX should trigger an overflow!") } } { let mut ten_u32s: ThinVec<u32> = thin_vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10]; if let Err(CapacityOverflow) = ten_u32s.try_reserve_exact(MAX_CAP/4 - 10) { panic!("isize::MAX shouldn't trigger an overflow!"); } if let Err(CapacityOverflow) = ten_u32s.try_reserve_exact(MAX_CAP/4 - 10) { panic!("isize::MAX shouldn't trigger an overflow!"); } if guards_against_isize { if let Err(CapacityOverflow) = ten_u32s.try_reserve_exact(MAX_CAP/4 - 9) { } else { panic!("isize::MAX + 1 should trigger an overflow!"); } } else { if let Err(AllocErr) = ten_u32s.try_reserve_exact(MAX_CAP/4 - 9) { } else { panic!("isize::MAX + 1 should trigger an OOM!") } } if let Err(CapacityOverflow) = ten_u32s.try_reserve_exact(MAX_USIZE - 20) { } else { panic!("usize::MAX should trigger an overflow!") } } } */ #[cfg(feature = "gecko-ffi")] #[test] fn auto_t_array_basic() { crate::auto_thin_vec!(let t: [u8; 10]); assert_eq!(t.capacity(), 10); assert!(t.is_auto_array()); assert!(t.uses_stack_allocated_buffer()); assert!(!t.has_allocation()); assert_eq!(t.len(), 0); { let inner = unsafe { &mut *t.as_mut().as_mut_ptr() }; for i in 0..30 { inner.push(i as u8); } } assert!(t.is_auto_array()); assert!(!t.uses_stack_allocated_buffer()); assert_eq!(t.len(), 30); assert!(t.has_allocation()); assert_eq!(t[5], 5); assert_eq!(t[29], 29); assert!(t.capacity() >= 30); { let inner = unsafe { &mut *t.as_mut().as_mut_ptr() }; inner.truncate(5); } assert_eq!(t.len(), 5); assert!(t.capacity() >= 30); assert!(t.has_allocation()); t.as_mut().shrink_to_fit(); assert!(!t.has_allocation()); assert!(t.is_auto_array()); assert!(t.uses_stack_allocated_buffer()); assert_eq!(t.capacity(), 10); } #[test] #[cfg_attr(feature = "gecko-ffi", ignore)] fn test_header_data() { macro_rules! assert_aligned_head_ptr { ($typename:ty) => {{ let v: ThinVec<$typename> = ThinVec::with_capacity(1 /* ensure allocation */); let head_ptr: *mut $typename = v.data_raw(); assert_eq!( head_ptr as usize % core::mem::align_of::<$typename>(), 0, "expected Header::data<{}> to be aligned", stringify!($typename) ); }}; } const HEADER_SIZE: usize = core::mem::size_of::<Header>(); assert_eq!(2 * core::mem::size_of::<usize>(), HEADER_SIZE); #[repr(C, align(128))] struct Funky<T>(T); assert_eq!(padding::<Funky<()>>(), 128 - HEADER_SIZE); assert_aligned_head_ptr!(Funky<()>); assert_eq!(padding::<Funky<u8>>(), 128 - HEADER_SIZE); assert_aligned_head_ptr!(Funky<u8>); assert_eq!(padding::<Funky<[(); 1024]>>(), 128 - HEADER_SIZE); assert_aligned_head_ptr!(Funky<[(); 1024]>); assert_eq!(padding::<Funky<[*mut usize; 1024]>>(), 128 - HEADER_SIZE); assert_aligned_head_ptr!(Funky<[*mut usize; 1024]>); } #[cfg(feature = "serde")] use serde_test::{assert_tokens, Token}; #[test] #[cfg(feature = "serde")] fn test_ser_de_empty() { let vec = ThinVec::<u32>::new(); assert_tokens(&vec, &[Token::Seq { len: Some(0) }, Token::SeqEnd]); } #[test] #[cfg(feature = "serde")] fn test_ser_de() { let mut vec = ThinVec::<u32>::new(); vec.push(20); vec.push(55); vec.push(123); assert_tokens( &vec, &[ Token::Seq { len: Some(3) }, Token::U32(20), Token::U32(55), Token::U32(123), Token::SeqEnd, ], ); } #[test] fn test_set_len() { let mut vec: ThinVec<u32> = thin_vec![]; unsafe { vec.set_len(0); // at one point this caused a crash } } #[test] #[should_panic(expected = "invalid set_len(1) on empty ThinVec")] fn test_set_len_invalid() { let mut vec: ThinVec<u32> = thin_vec![]; unsafe { vec.set_len(1); } } #[test] #[should_panic(expected = "capacity overflow")] fn test_capacity_overflow_header_too_big() { let vec: ThinVec<u8> = ThinVec::with_capacity(isize::MAX as usize - 2); assert!(vec.capacity() > 0); } #[test] #[should_panic(expected = "capacity overflow")] fn test_capacity_overflow_cap_too_big() { let vec: ThinVec<u8> = ThinVec::with_capacity(isize::MAX as usize + 1); assert!(vec.capacity() > 0); } #[test] #[should_panic(expected = "capacity overflow")] fn test_capacity_overflow_size_mul1() { let vec: ThinVec<u16> = ThinVec::with_capacity(isize::MAX as usize + 1); assert!(vec.capacity() > 0); } #[test] #[should_panic(expected = "capacity overflow")] fn test_capacity_overflow_size_mul2() { let vec: ThinVec<u16> = ThinVec::with_capacity(isize::MAX as usize / 2 + 1); assert!(vec.capacity() > 0); } #[test] #[should_panic(expected = "capacity overflow")] fn test_capacity_overflow_cap_really_isnt_isize() { let vec: ThinVec<u8> = ThinVec::with_capacity(isize::MAX as usize); assert!(vec.capacity() > 0); } struct PanicBomb(&'static str); impl Drop for PanicBomb { fn drop(&mut self) { if self.0 == "panic" { panic!("panic!"); } } } #[test] #[should_panic(expected = "panic!")] fn test_panic_into_iter() { let mut v = ThinVec::new(); v.push(PanicBomb("normal1")); v.push(PanicBomb("panic")); v.push(PanicBomb("normal2")); let mut iter = v.into_iter(); iter.next(); } #[test] #[should_panic(expected = "panic!")] fn test_panic_clear() { let mut v = ThinVec::new(); v.push(PanicBomb("normal1")); v.push(PanicBomb("panic")); v.push(PanicBomb("normal2")); v.clear(); } }
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2026-10-11