Update Rust crate proc-macro2 to v1.0.103

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
proc-macro2	dependencies	patch	1.0.19 -> 1.0.103

---

Release Notes

dtolnay/proc-macro2 (proc-macro2)

v1.0.103

Compare Source

• Add semver-exempt Literal methods str_value, cstr_value, byte_str_value (#​525)

v1.0.102

Compare Source

• Fix interaction of Display impls for TokenStream and Ident with formatting specifiers for padding, alignment, width (#​523, #​524)

v1.0.101

Compare Source

• Optimize Span location accessors (#​519)

v1.0.100

Compare Source

• Stabilize Span methods on Rust 1.88+: start, end, line, column, file, local_file (#​517, #​518)

v1.0.99

Compare Source

• Prevent Span's unstable API becoming unavailable from a future new compiler lint (#​515)

v1.0.98

Compare Source

• Disallow prefixed identifier as name of lifetime: 'prefix#lifetime (#​514, rust-lang/rust#126452)

v1.0.97

Compare Source

• Allow build-script cleanup failure with NFSv3 output directory to be non-fatal (#​505, #​512, thanks @​davvid)

v1.0.96

Compare Source

• Simplify how rustdoc flags are decided during docs.rs builds (#​511)

v1.0.95

Compare Source

• Update semver-exempt API under RUSTFLAGS=--cfg=procmacro2_semver_exempt to that of nightly-2025-04-16 (#​497)

v1.0.94

Compare Source

• Documentation improvements

v1.0.93

Compare Source

• Optimize TokenStream's Drop (#​489, #​490, thanks @​WalkerKnapp)

v1.0.92

Compare Source

• Improve compiler/fallback mismatch panic message (#​487)

v1.0.91

Compare Source

• Fix panic "compiler/fallback mismatch 949" when using TokenStream::from_str from inside a proc macro to parse a string containing doc comment (#​484)

v1.0.90

Compare Source

• Improve error recovery in TokenStream's and Literal's FromStr implementations to work around rust-lang/rust#58736 such that rustc does not poison compilation on codepaths that should be recoverable errors (#​477, #​478, #​479, #​480, #​481, #​482)

v1.0.89

Compare Source

• Ensure OUT_DIR is left with deterministic contents after build script execution (#​474)

v1.0.88

Compare Source

• Return accurate line and column from Span::start and Span::end inside proc macros on nightly (#​472)

v1.0.87

Compare Source

• Check valid punctuation character in Punct::new (#​470)

v1.0.86

Compare Source

• Documentation improvements

v1.0.85

Compare Source

• Mark some tests as only for 64-bit targets (#​463)

v1.0.84

Compare Source

• Documentation improvements (#​455, thanks @​CensoredUsername)

v1.0.83

Compare Source

• Optimize the representation of Ident (#​462)

v1.0.82

Compare Source

• Resolve unexpected_cfgs warning (#​456)

v1.0.81

Compare Source

• Documentation improvements

v1.0.80

Compare Source

• Add Literal::byte_character constructor (#​449)
• Add Literal::c_string constructor #​450)

v1.0.79

Compare Source

• Clean up dead code

v1.0.78

Compare Source

• Expose Span::byte_range (#​442)

v1.0.77

Compare Source

• Add a function to reset thread-local span data (#​438, thanks @​buchgr)

v1.0.76

Compare Source

• Work around dead_code warning false positive (#​435)

v1.0.75

Compare Source

• Improve error messages related to proc_macro::LexError (#​434)

v1.0.74

Compare Source

• Work around improperly cached build script result by sccache (#​432)

v1.0.73

Compare Source

• Documentation improvements

v1.0.72

Compare Source

• Improve build script to be robust to proc_macro::Span unstable API changes

v1.0.71

Compare Source

• Turn on deny(unsafe_op_in_unsafe_fn) lint

v1.0.70

Compare Source

• Add #[track_caller] on Ident::new so that panics on invalid input are attributed to the caller (#​423)

v1.0.69

Compare Source

• Fix Span::source_text() bug causing panics or incorrect source text (#​410)

v1.0.68

Compare Source

• Fix panic in Span::source_text() when source contains multibyte characters (#​408)

v1.0.67

Compare Source

• Special handling for the (/*ERROR*/) placeholder that rustc uses for macros that fail to expand (#​405)

v1.0.66

Compare Source

• Raise required compiler from Rust 1.31 to 1.56

v1.0.65

Compare Source

• Documentation improvements

v1.0.64

Compare Source

• Fix parsing of bare \r in between tokens (#​399)

v1.0.63

Compare Source

• Parse c"…" c-string literals (tracking issue: rust-lang/rust#105723)

v1.0.62

Compare Source

yanked

v1.0.61

Compare Source

• Stricter parsing of whitespace in cooked string literals and between tokens (#​392, #​393)

v1.0.60

Compare Source

• Eliminate uses of unstable proc_macro::Span::before/after (#​391)

v1.0.59

Compare Source

• Enable proc_macro support on wasm targets (#​388)

v1.0.58

Compare Source

• Make rustc version detection more robust by compiling against modernest stable features (#​384)

v1.0.57

Compare Source

• Disable nightly-only start()/end() implementation on Span while the upstream API is iterated on (#​383, rust-lang/rust#111571)

v1.0.56

Compare Source

• Circumvent clippy::octal_escapes lint inside generated string and byte-string literals (#​363, #​380)
• Provide RefUnwindSafe impls for compilers older than 1.58 (#​382)

v1.0.55

Compare Source

• Set a meaningful Span for literals produced via the FromStr impl of Literal (#​378)
• Implement Literal::subspan in non-macro contexts when "span-locations" feature is enabled (#​379)

v1.0.54

Compare Source

• Performance improvement to "span-locations" feature (#​373)
• Fix unbounded memory usage when calling proc-macro2's parser from a fuzzer (#​374)

v1.0.53

Compare Source

• Add support for Rust 1.66's source_text() method (#​350)

v1.0.52

Compare Source

• Add Group::delim_span (#​366)

v1.0.51

Compare Source

• Implement rustc's limit on the number of # used for delimiting a raw string literal: 255 (#​364)

v1.0.50

Compare Source

• Implement Hash for proc_macro2::LineColumn (#​362)

v1.0.49

Compare Source

• Opt out of -Zrustdoc-scrape-examples on docs.rs for now

v1.0.48

Compare Source

• Documentation improvements

v1.0.47

Compare Source

• Fix integer overflow when nesting depth of nested comments exceeds 4 billion (#​357)

v1.0.46

Compare Source

• Make proc_macro2::TokenStream's FromStr impl consistent with proc_macro::TokenStream's on strings that begin with a byte order mark \u{feff} (#​353)

v1.0.45

Compare Source

• Fix panic on parsing disallowed raw identifiers such as r#self (#​351)

v1.0.44

Compare Source

• Expose span.before() and span.after() to access an empty Span located immediately before or after the input span (#​348, upstream tracking issue: rust-lang/rust#87552)

v1.0.43

Compare Source

• Add keywords to crates.io metadata

v1.0.42

Compare Source

• Improve parsing performance in non-macro mode (#​335)
• Expose a size_hint() for TokenStream's iterator (#​334)

v1.0.41

Compare Source

• Produce an accurate .size_hint() from TokenStream's iterator (#​334)

v1.0.40

Compare Source

• Stabilize Ident::new_raw constructor (#​331, thanks @​mystor)

v1.0.39

Compare Source

• Replace unicode-xid with unicode-ident crate: https://github.com/dtolnay/unicode-ident

v1.0.38

Compare Source

• Reduce allocations done by Literal::byte_string constructor (#​328)

v1.0.37

Compare Source

• Rely on unicode-xid to optimize ASCII properly (#​325)

v1.0.36

Compare Source

• Improve performance of creating literal tokens through quote! macro

v1.0.35

Compare Source

• Try to diagnose "cannot find type SourceFile" errors better (#​311)

v1.0.34

Compare Source

• Work around doc build failure due to docs.rs flags change (#​310)

v1.0.33

Compare Source

• Enable Group::span_open/span_close on Rust 1.55+ to reflect their stabilization in rustc (#​305, rust-lang/rust#86136)

v1.0.32

Compare Source

• Support negative int and float literals in FromStr (rust-lang/rust#87262, #​301)

v1.0.31

Compare Source

• Update Cargo metadata to new repository location

v1.0.30

Compare Source

• Use proc_macro::is_available on Rust 1.57+ to support projects built with panic=abort or cg_clif (#​300, thanks @​bjorn3)

v1.0.29

Compare Source

• Pick up stable implementation of proc_macro's impl FromStr for Literal (#​287)

v1.0.28

Compare Source

• Recognized Cargo's new CARGO_ENCODED_RUSTFLAGS environment variable (#​294, rust-lang/cargo#9601)

v1.0.27

Compare Source

• impl FromStr for Literal (#​286, rust-lang/rust#84717)

v1.0.26

Compare Source

• Add impl LexError { pub fn span(&self) -> Span } (#​283)

v1.0.25

Compare Source

• Documentation improvements (#​278, #​279)

v1.0.24

Compare Source

• Implement Error and Display for proc_macro2::LexError, matching the libproc_macro impls which exists in Rust 1.44+ (#​240)

v1.0.23

Compare Source

• Fix several bugs involving lexing of unicode escapes and carriage returns in string literals (#​256, #​257, #​258, #​259, #​260)

v1.0.22

Compare Source

• Fix several bugs involving lexing of integer and float tokens with unusual suffixes (#​252, #​253, #​254, #​255)

v1.0.21

Compare Source

• Match libproc_macro's UnwindSafe and RefUnwindSafe impls (#​250)

v1.0.20

Compare Source

• Match libproc_macro's rendering of whitespace in groups (#​246, #​247, thanks @​Koxiaet)

---

Configuration

📅 Schedule: Branch creation - "after 9am on Saturday" in timezone Asia/Tokyo, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.