Update Rust crate syn to v1.0.109 #30

Parse closures with explicit empty lifetime parameter list for<> || -> T {…} (#1212, https://github.com/rust-lang/rust/issues/97362)
Parse dyn* provisional syntax (#1213, https://github.com/rust-lang/rust/issues/91611)
Parse attributes on the "rest" pattern of a struct in pattern position, Struct { #[attr] .. } (#1214)
Parse static async and static async move closures (#1215, https://github.com/rust-lang/rust/issues/62290)

`v1.0.99`

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Add categories and keywords to crates.io metadata

`v1.0.98`

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Format example code with rustfmt

`v1.0.97`

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Update examples

`v1.0.96`

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Add a punct_mut() method on syn::punctuated::Pair to return Option<&mut P> (#1183)

`v1.0.95`

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

`v1.0.94`

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Resolve some unused_macro_rules warnings

`v1.0.93`

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Fix compile error when Some means something unusual in the expression namespace of the scope where custom_keyword is invoked (#1171, thanks @zakarumych)

`v1.0.92`

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Make compatible with Miri's tag-raw-pointers mode (#1166, thanks @saethlin)

`v1.0.91`

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impl ToTokens for RangeLimits
impl Parse for ExprAwait
impl Parse for GenericMethodArgument
impl Parse for MethodTurbofish

`v1.0.90`

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Update recommended exhaustive matching idiom to use non_exhaustive_omitted_patterns lint:

match expr {
    Expr::Array(e) => {…}
    Expr::Assign(e) => {…}
    ...
    Expr::Yield(e) => {…}

    #[cfg_attr(test, deny(non_exhaustive_omitted_patterns))]
    _ => {/* some sane fallback */}
}

`v1.0.89`

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Remove support for inner attributes on non-block expressions (#1146, https://github.com/rust-lang/rust/pull/83312)
Fix panic on comma after mut self in a bare fn type (#1148)

`v1.0.88`

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Parse .. pattern in pattern of let (#1136)
Parse for<…> lifetime introducer on closures (#1135)
Reject postfix operators after cast (#1117)
Implement extra-traits for Nothing (#1144)

`v1.0.87`

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Parse trait bounds containing associated constant constraint (#1138)
Change syntax of where-clauses on generic associated types (#1071, https://github.com/rust-lang/rust/issues/89122)

`v1.0.86`

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Add support for parsing if- and while-let-chains (RFC 2497)

`v1.0.85`

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Add token() method to each variant of syn::Lit to expose the underlying token representation with original formatting

`v1.0.84`

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Add parse_quote_spanned! macro which is a combination parse_quote! + quote_spanned!

`v1.0.83`

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Fix panic parsing trait impl with qself in trait type: impl <Thing<>>::Trait for Type {} (#1109)
Preserve attributes on let-else stmt: #[attr] let pat = val else { return } (#1110)

`v1.0.82`

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Support parenthesized generic argument syntax with :: disambiguator: Fn::() -> ! (#1096)

`v1.0.81`

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Support arbitrary precision negative literal tokens on rustc 1.56+ (#1087, #1088)

`v1.0.80`

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Parse unstable ~const syntax in where-clauses (#1083, tracking issue https://github.com/rust-lang/rust/issues/67792)

`v1.0.79`

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Support trailing + in dyn Trait syntax, including bare (non-dyn) pre-2018 trait object syntax (#1075, #1077, #1078, #1079, #1080, #1081)

`v1.0.78`

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Parse trailing + in the bounds of impl Trait type (#1073)

`v1.0.77`

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Match Rust 1.57+'s parsing of dot and question mark after a curly braced macro invocation (#1068)

`v1.0.76`

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Parse unstable let–else syntax (#1050, #1057)
Parse qualified braced variant expressions and patterns: <E>::V {..} (#1058, #1059)
Fix precedence of outer attributes in front of an assignment expression in statement position (#1060)

`v1.0.75`

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Improve spans on a method without body inside an impl block
Documentation improvements (#922, thanks @Tamschi)

`v1.0.74`

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Reject for<'a> dyn Trait<'a> syntax; the correct representation is dyn for<'a> Trait<'a> (#1042)

`v1.0.73`

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Add From<Ident>, From<Index>, From<usize> for Member (#1038, thanks @m-ou-se)

`v1.0.72`

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Parse const generics which use value of a previous const generic parameter as a default value (#1027)

`v1.0.71`

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Fix panic deserializing an ItemImpl with a non-path in trait position (#1023)
Parse visibility on impl blocks (#1024)
Fix parsing a type parameter default on the first generic parameter of an impl block (#1025, thanks @taiki-e)

`v1.0.70`

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Fix precedence of closure body vs ExprRange rhs: || .. .method() (#1019)
Parse inner attributes inside of structs and enums (#1022)

`v1.0.69`

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Improve Parse impls of ExprBox, ExprUnary, ExprLet, ExprClosure, ExprReference, ExprBreak, ExprContinue, ExprReturn, ExprYield to respect precedence for parsing a subexpression beginning with the respective keyword/punctuation (#1007, #1008, #1009, #1010, #1011, #1012, #1013, #1014, #1015)

`v1.0.68`

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Preserve span of LexError on conversion to syn::Error (#1006)

`v1.0.67`

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Accept outer attributes in the Parse impl of ExprBlock (#1004)

`v1.0.66`

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Parse equality constraints on generic associated types (#979)
Parse default value exprs in const generic declarations (#980)
Fix infinite loop parsing malformed type ascription expression in non-full mode (#978)
Improve Parse impls of ExprArray, ExprAsync, ExprBlock, ExprMacro, ExprParen, ExprRepeat, ExprStruct, ExprTryBlock, ExprUnsafe to succeed parsing even in the presence of trailing binary operators (#991, #992, #993, #994, #995, #996, #997, #998, #999)

`v1.0.65`

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Parse visibility on macro_rules (#981, tracking issue rust-lang/rust#78855)
Parse leading vert in or-patterns (#982, matching the Rust grammar change in rust-lang/rust#81869)
Parse static with omitted type (#983)
Parse placeholder type in type parameter position (#984)

`v1.0.64`

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Avoid clippy::expl_impl_clone_on_copy pedantic lint in downstream custom token types (#976)

`v1.0.63`

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Fix parsing associated types with empty trait bound list after colon (#974)

`v1.0.62`

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Republish to work around docs.rs bug https://github.com/rust-lang/docs.rs/issues/1300

`v1.0.61`

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Improve assertion failures on invalid use of Punctuated API (#970, thanks @osa1)
Add Lifetime::span and Lifetime::set_span accessors (#971)

`v1.0.60`

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Provide an idiom for testing exhaustiveness of pattern matches on Expr, Type, Pat, Item, ForeignItem, TraitItem, and ImplItem (#694)
```
match expr {
    Expr::Array(e) => {...}
    Expr::Assign(e) => {...}
    ...
    Expr::Yield(e) => {...}

    #[cfg(test)]
    Expr::__TestExhaustive(_) => unimplemented!(),
    #[cfg(not(test))]
    _ => { /* some sane fallback */ }
}
```
The above is the only supported idiom for exhaustive matching of those enum. Do not write anything differently as it is not supported.

The conditional compilation on match-arms lets us fail your tests but not break your library when adding a variant. You will be notified by a test failure when a variant is added, so that you can add code to handle it, but your library will continue to compile and work for downstream users in the interim.

`v1.0.59`

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Parse empty supertrait lists consistently with rustc (#952)
Fix loss of span information on comma tokens inside of Type::Tuple during parse (#959)

`v1.0.58`

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Allow literals to parse as a const generic path argument even without "full" feature enabled (#951)
```
pub struct Struct {
    array: Array<10>,  // used to require `features = "full"`
}
```

`v1.0.57`

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Make Punctuated::new available as a const fn (#949)

`v1.0.56`

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Add Error::into_compile_error

`v1.0.55`

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Preserve None-delimited group around macro metavariable when parsing T<$ty> (#944, #945)

`v1.0.54`

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Fix parsing of impl items with macro metavariable in the trait path: impl $trait for Type {...} (#942)

`v1.0.53`

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Parse impl !Trait {...} syntax (#936)

`v1.0.52`

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Parse unsafe extern block syntax (#918)
Parse unsafe mod syntax (#919)
Parse const {...} block syntax (#921)
Parse destructuring assignment syntax (#933)

`v1.0.51`

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Allow parsing signatures in which const generic params appear in front of lifetime params (#920)

`v1.0.50`

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Apply doc(cfg(...)) on feature gated APIs for docs.rs-rendered documentation (#925)

`v1.0.48`

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Rebuild for https://astexplorer.net

`v1.0.47`

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Documentation improvements

`v1.0.46`

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Fix parsing structured attributes that contain nested absolute paths, such as #[derive(::serde::Serialize)] (#909)

`v1.0.45`

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Provide more detailed error messages when parsing specific literal kind (#908)

`v1.0.44`

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Fix some parsing of patterns inside of None-delimited groups (#907)

`v1.0.43`

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Add Parse impl for syn::Signature

`v1.0.42`

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Fix several bugs involving unusual suffixes on integer and floating point literal tokens (#898, #899, #900)

`v1.0.41`

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Fix panic on printing an incomplete (having fewer path segments than originally parsed with) qualified path (ExprPath, PatPath, TypePath containing QSelf) (#891, thanks @taiki-e)
Fix panic triggered by syntactically invalid overflowing negative float literal after . in a field access position, e.g. let _ = obj.-0.9E999999 (#895, thanks @sameer)
Enable using parse_macro_input! with a Parser function rather than type having a Parse impl (#896, thanks @sbrocket)

`v1.0.40`

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Fix panic on parsing float literals having both an exponent and a suffix beginning with 'e' or 'E', such as 9e99e999 (#893)

`v1.0.39`

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Improve compile time by pre-expanding derives (#885)
Parse const generic parameters in any order relative to type parameters (#886)

`v1.0.38`

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Accept traits with parenthesized path arguments in impls (#880, thanks @alecmocatta)

`v1.0.37`

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Handle shebang in a way that matches rustc 1.46+ (#876, https://github.com/rust-lang/rust/pull/71487, https://github.com/rust-lang/rust/pull/73596)
```
#!//am/i/a/comment

fn main() {} // ^ shebang
```
```
#!//am/i/a/comment

[allow(dead_code)] // ^ not a shebang
fn main() {}
```
Accept tuple.0. 0 as a tuple indexing expression (#877)

`v1.0.36`

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Add Lit::span, Lit::set_span (#874)

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Update Rust crate syn to v1.0.109

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Update Rust crate syn to v1.0.109 #30

Update Rust crate syn to v1.0.109 #30

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