bitflags • 1.3.2A macro to generate structures which behave like bitflags.
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cfg-if • 1.0.1A macro to ergonomically define an item depending on a large number of #[cfg]
parameters. Structured like an if-else chain, the first matching branch is the
item that gets emitted.
proc-macro2 • 1.0.95A substitute implementation of the compiler's `proc_macro` API to decouple token-based libraries from the procedural macro use case.
regex • 1.7.3An implementation of regular expressions for Rust. This implementation uses
finite automata and guarantees linear time matching on all inputs.
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rustc_version • 0.4.1A library for querying the version of a installed rustc compiler
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scopeguard • 1.2.0A RAII scope guard that will run a given closure when it goes out of scope,
even if the code between panics (assuming unwinding panic).
Defines the macros `defer!`, `defer_on_unwind!`, `defer_on_success!` as
shorthands for guards with one of the implemented strategies.
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semver • 1.0.26Parser and evaluator for Cargo's flavor of Semantic Versioning
stable_deref_trait • 1.2.0An unsafe marker trait for types like Box and Rc that dereference to a stable address even when moved, and hence can be used with libraries such as owning_ref and rental.
typenum • 1.18.0Typenum is a Rust library for type-level numbers evaluated at
compile time. It currently supports bits, unsigned integers, and signed
integers. It also provides a type-level array of type-level numbers, but its
implementation is incomplete.
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version_check • 0.9.5Tiny crate to check the version of the installed/running rustc.