Update Rust crate syn to v2.0.109

[oxide-renovate]

This PR contains the following updates:

Package	Type	Update	Change
syn	dependencies	patch	2.0.41 -> 2.0.109

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Release Notes

dtolnay/syn (syn)

v2.0.109

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• Tweaks to improve build speed (#​1927, #​1928, #​1930, #​1932, #​1934, thanks @​dishmaker)

v2.0.108

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• Parse unrecognized or invalid literals as Lit::Verbatim (#​1925)

v2.0.107

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• Improve panic message when constructing a LitInt, LitFloat, or Lit from invalid syntax (#​1917)
• Improve panic message on Punctuated index out of bounds (#​1922)

v2.0.106

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• Replace ~const syntax with [const] conditionally const syntax in trait bounds (#​1896, rust-lang/rust#139858)
• Support conditionally const impl Trait types (#​1897)
• Reject polarity modifier and lifetime binder used in the same trait bound (#​1899, rust-lang/rust#127054)
• Parse const trait bounds with bound lifetimes (#​1902)
• Parse bound lifetimes with lifetime bounds (#​1903)
• Allow type parameters and const parameters in trait bounds and generic closures (#​1904, #​1907, #​1908, #​1909)

v2.0.105

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• Disallow "negative" inherent impls like impl !T {} (#​1881, rust-lang/rust#144386)

v2.0.104

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• Disallow attributes on range expression (#​1872)

v2.0.103

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• Insert parentheses around binary operation with attribute (#​1871)

v2.0.102

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• Fix printing of nested Expr::Index and Expr::Tuple in non-full mode (#​1869)

v2.0.101

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• Improve TypeGenerics::as_turbofish to return longer-lived return value (#​1861)

v2.0.100

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• Add Visit::visit_token_stream, VisitMut::visit_token_stream_mut, Fold::fold_token_stream for processing TokenStream during syntax tree traversals (#​1852)

v2.0.99

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• Documentation improvements

v2.0.98

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• Allow lifetimes in function pointer return values in ParseStream::call and Punctuated parsers (#​1847)

v2.0.97

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• Documentation improvements

v2.0.96

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• Expression precedence fixes (#​1834, #​1836, #​1837, #​1838, #​1839, #​1840)

v2.0.95

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• Fix parenthesization of struct literals in let-chains (#​1832)

v2.0.94

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• Expression precedence fixes (#​1811, #​1812, #​1813, #​1814, #​1815, #​1816, #​1818, #​1819, #​1820, #​1825, #​1826, #​1827, #​1828, #​1829, #​1830)

v2.0.93

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• Fix expression parsing edge cases: x as T <<= y (#​1804), break as T (#​1805), match x { _ if .. => {} } (#​1807)
• Fix expression printing edge cases: || -> T 'a: {} (#​1806), if break x {} (#​1808, #​1810)

v2.0.92

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• Fix parenthesization of jumps inside ranges (#​1798)

v2.0.91

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• Support parsing Vec<Arm> using parse_quote! (#​1796, #​1797)

v2.0.90

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• Fix automatic parenthesization of subexpressions containing outer attributes, such as (#[attr] thing).field (#​1785)
• Fix automatic parenthesization of function calls via a struct field, such as (thing.field)() and thing.0() (#​1786)

v2.0.89

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• Fix "compiler/fallback mismatch 949" panic (dtolnay/proc-macro2#483)

v2.0.88

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• Improve error recovery in parse_str (#​1783)

v2.0.87

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• Add Cursor::any_group (#​1777)
• Add Expr::peek (#​1778)
• Improve syntax support for enum discriminant expressions in non-"full" mode (#​1779)

v2.0.86

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• Support peeking the end of a parse stream (#​1689)
• Allow parse_quote! to produce Vec<Attribute> (#​1775)

v2.0.85

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• Preserve extern static unsafety in ForeignItem::Verbatim (#​1773)

v2.0.84

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• Parse safe and explicitly unsafe extern items (#​1768, rust-lang/rust#123743, rust-lang/rfcs#3484)
• Parse self captures: impl Sized + use<Self> (#​1772)

v2.0.83

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• Documentation improvements

v2.0.82

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• Provide Parse impls for PreciseCapture and CapturedParam (#​1757, #​1758)
• Support parsing unsafe attributes (#​1759)
• Add Fold and VisitMut methods for Vec<Attribute> (#​1762)

v2.0.81

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• Add TypeParamBound::PreciseCapture to represent precise capture syntax impl Trait + use<'a, T> (#​1752, #​1753, #​1754)

v2.0.80

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• Add Expr::RawAddr (#​1743)
• Reject precise captures and ~const in inappropriate syntax positions (#​1747)
• Reject trait bound containing only precise capture (#​1748)

v2.0.79

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• Fix infinite loop on parsing chained ranges (#​1741)
• Fix panic in parsing use items containing absolute paths (#​1742)

v2.0.78

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• Fix infinite loop on chained comparison (#​1739)

v2.0.77

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• Support parsing Expr::Tuple in non-"full" mode (#​1727)

v2.0.76

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• Enforce that tail call become keyword is followed by an expression (#​1725)

v2.0.75

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• Automatically fill in missing turbofish when printing ExprPath and other paths in expression position (#​1722)

v2.0.74

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• Fix "temporary is dropped and runs the destructor for type `impl Iterator`" regression affecting certain use of Generics iterator methods (#​1719)

v2.0.73

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• Support parsing unnamed C varargs within function pointer types (#​1711)
• Improve synthesized error message on unexpected tokens at the end of the expected contents of a delimited group (#​1713)
• Support parsing unstable tail call syntax (#​1714, rust-lang/rust#112788)
• Add Fields::members iterator (#​1716, thanks @​Fancyflame)

v2.0.72

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• Parse use<'a, T> precise capturing bounds (#​1707, thanks @​compiler-errors)

v2.0.71

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• Do not require mutable borrow in Punctuated::get() (#​1706, thanks @​lemunozm)

v2.0.70

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• Improve parenthesization of closures, jumps, ranges, chained comparisons, and let (#​1694, #​1695, #​1698, #​1699, #​1700)

v2.0.69

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• Correctly parenthesize labeled loops inside a break value (#​1692)
• Add Punctuated::get and get_mut (#​1693)

v2.0.68

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• Improve panic location when parse_quote! parses invalid syntax (#​1690, thanks @​stepancheg)
• More efficient peek implementation for Group and Lifetime (#​1687)

v2.0.67

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• Produce more accurate error message locations for errors located at the end of a nested group (#​1679, #​1680)
• Support peeking LitCStr in ParseStream::peek (#​1682)

v2.0.66

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• Allow braced structs when parsing ExprLet (#​1671)

v2.0.65

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• Optimize the implementation of Fold to compile faster (#​1666, #​1667, #​1668)

v2.0.64

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• Support using ParseBuffer across catch_unwind (#​1646)
• Validate that the expression in a let-else ends in brace as required by rustc (#​1648, #​1649)
• Legalize invalid const generic arguments by wrapping in braces (#​1654, #​1655)
• Fix some expression precedence edge cases involving break and return in loop headers (#​1656)
• Always print closure bodies with a brace when the closure has an explicit return type (#​1658)
• Automatically insert necessary parentheses in ToTokens for Expr when required by expression precedence (#​1659)
• Support struct literal syntax in match guard expressions (#​1662)

v2.0.63

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• Parse and print long if-else-if chains without reliance on deep recursion to avoid overflowing stack (#​1644, #​1645)

v2.0.62

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• Reject invalid unparenthesized range and comparison operator expressions (#​1642, #​1643)

v2.0.61

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• Check for legal binding name in the ident of Pat::Ident (#​1627)
• Resolve unexpected_cfgs warning (#​1635)

v2.0.60

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• Improve how None-delimited groups are counted by peek (#​1625)

v2.0.59

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• Parse c"…" and cr"…" C-string literal syntax as Lit::CStr (#​1502)

v2.0.58

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• Support $ in custom_punctuation! macro (#​1611)

v2.0.57

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• Eliminate dependency on quote when built with default-features disabled and the "proc-macro" feature enabled (#​1608, thanks @​BD103)

v2.0.56

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• Apply RUSTC_WORKSPACE_WRAPPER when deciding whether to run nightly-only tests (#​1605)

v2.0.55

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

v2.0.54

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

v2.0.53

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

v2.0.52

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

v2.0.51

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

v2.0.50

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• Fix unused_imports warnings when compiled by rustc 1.78

v2.0.49

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

v2.0.48

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

v2.0.47

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

v2.0.46

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

v2.0.45

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• Parse unsupported expressions in enum discriminants of DeriveInput as Expr::Verbatim in non-"full" mode, instead of error (#​1513)
• Support parsing PatType with parse_quote! (#​1573)

v2.0.44

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• Documentation improvements

v2.0.43

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• Insert trailing comma if not already present when printing a 1-tuple in pattern position (#​1553)

v2.0.42

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• Documentation improvements

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