proc-macro2 • 1.0.92A substitute implementation of the compiler's `proc_macro` API to decouple token-based libraries from the procedural macro use case.
semver • 0.9.0Parser and evaluator for Cargo's flavor of Semantic Versioning
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semver • 1.0.24Parser and evaluator for Cargo's flavor of Semantic Versioning
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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 • 1.17.0Typenum 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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vcell • 0.1.3`Cell` with volatile read / write operations
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version_check • 0.9.5Tiny crate to check the version of the installed/running rustc.