/*!
Provides a regex matcher that composes several other regex matchers
automatically .
This module is home to a meta [ ` Regex ` ] , which provides a convenient high
level API for executing regular expressions in linear time .
# Comparison with the ` regex ` crate
A meta ` Regex ` is the implementation used directly by the ` regex ` crate .
Indeed , the ` regex ` crate API is essentially just a light wrapper over a meta
` Regex ` . This means that if you need the full flexibility offered by this
API , then you should be able to switch to using this API directly without
any changes in match semantics or syntax . However , there are some API level
differences :
* The ` regex ` crate API returns match objects that include references to the
haystack itself , which in turn makes it easy to access the matching strings
without having to slice the haystack yourself . In contrast , a meta ` Regex `
returns match objects that only have offsets in them .
* At time of writing , a meta ` Regex ` doesn ' t have some of the convenience
routines that the ` regex ` crate has , such as replacements . Note though that
[ ` Captures : : interpolate_string ` ] ( crate : : util : : captures : : Captures : : interpolate_string )
will handle the replacement string interpolation for you .
* A meta ` Regex ` supports the [ ` Input ` ] ( crate : : Input ) abstraction , which
provides a way to configure a search in more ways than is supported by the
` regex ` crate . For example , [ ` Input : : anchored ` ] ( crate : : Input : : anchored ) can
be used to run an anchored search , regardless of whether the pattern is itself
anchored with a ` ^ ` .
* A meta ` Regex ` supports multi - pattern searching everywhere .
Indeed , every [ ` Match ` ] ( crate : : Match ) returned by the search APIs
include a [ ` PatternID ` ] ( crate : : PatternID ) indicating which pattern
matched . In the single pattern case , all matches correspond to
[ ` PatternID : : ZERO ` ] ( crate : : PatternID : : ZERO ) . In contrast , the ` regex ` crate
has distinct ` Regex ` and a ` RegexSet ` APIs . The former only supports a single
pattern , while the latter supports multiple patterns but cannot report the
offsets of a match .
* A meta ` Regex ` provides the explicit capability of bypassing its internal
memory pool for automatically acquiring mutable scratch space required by its
internal regex engines . Namely , a [ ` Cache ` ] can be explicitly provided to lower
level routines such as [ ` Regex : : search_with ` ] .
*/
pub use self ::{
error::BuildError,
regex::{
Builder, Cache, CapturesMatches, Config, FindMatches, Regex, Split,
SplitN,
},
};
mod error;
#[ cfg(any(feature = "dfa-build" , feature = "hybrid" ))]
mod limited;
mod literal;
mod regex;
mod reverse_inner;
#[ cfg(any(feature = "dfa-build" , feature = "hybrid" ))]
mod stopat;
mod strategy;
mod wrappers;
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