0.4.30

• Implement Clone for TokenStream's IntoIter (#177, thanks @ivanbakel)

0.4.29

• Support compiling with RUSTFLAGS='-Z allow-features=' on a nightly compiler (#176, thanks @Nemo157)

0.4.28

• Avoid needlessly escaping ' inside a string literal or " inside a character literal (#60)
• Add impls of Copy, Clone, Debug, PartialEq, Eq for proc_macro2::LineColumn

0.4.27

• Add Cargo cfg "span-locations" to expose Span::start and Span::end accessors that give the line and column location of a Span (#166)

  Be aware that this involves storing more information than before inside of Spans which increases their size -- leading to possibly slower performance of any code involving proc-macro2 types (but only when the cfg is enabled).

0.4.26

• Update documentation to 2018 edition
• Rename span.unstable() method to span.unwrap(); this method is usable from a stable compiler but panics if called from outside of a procedural macro

0.4.25

• Disable stable shim when building with procmacro2_semver_exempt on a nightly compiler (#158)

0.4.24

• Remove semver exempt type proc_macro2::FileName in favor of PathBuf (rust-lang/rust@e5e29d1)
• Remove Send and Sync impls of semver exempt type SourceFile (#141)
• Support building semver exempt APIs on stable channel (#152)

0.4.23

• Work around compilation failures in docs.rs when proc-macro2 is used as a dependency (#147)

0.4.22

• Attempt to work around documentation not appearing on docs.rs (#145)

0.4.21

• Add support for constructing 128 bit Literal integers (#144)