2.0.55

• Restore compatibility with rustc 1.56 through 1.59 (#1603)

2.0.54

• Fix dead code warning in generated code when using custom_keyword! with syn's "printing" feature disabled (#1602)

2.0.53

• Implement Copy, Clone, and ToTokens for syn::parse::Nothing (#1597)

2.0.52

• Add an expression parser that uses match-arm's boundary rules (#1593)

2.0.51

• Resolve non_local_definitions warnings in generated code under rustc 1.78-nightly

2.0.50

• Fix unused_imports warnings when compiled by rustc 1.78

2.0.49

• Improve error location when parsing from an empty string literal using LitStr::parse (#1590)

2.0.48

• Improve error message on unexpected token after else (#1578)

2.0.47

• Improve error messages related to proc_macro::LexError (#1575)

2.0.46

• Update proc-macro2 to fix caching issue when using a rustc-wrapper such as sccache