chore(deps): bump syn from 1.0.108 to 2.0.13 #17096

dependabot · 2023-04-10T18:55:37Z

Bumps syn from 1.0.108 to 2.0.13.

Release notes

2.0.13

Improve spans of Expr::Field parsed from a float Literal (#1433, #1436)

2.0.12

Refer to compile_error! by absolute path in token stream produced by syn::Error::to_compile_error (#1431, thanks @smoelius)

2.0.11

Improve error message on empty parens inside parse_nested_meta (#1428)

2.0.10

Fix visibility being parsed incorrectly on macro invocations inside of a trait

2.0.9

Disallow type items in an extern block, trait, or module from being marked default

2.0.8

Treat try keyword as 2015-edition identifier in definition of try macro (#1422)

2.0.7

Fix parsing of mut self inside of Type::BareFn

2.0.6

Improve error message on missing ';' between statements (#1419)

Keep non-brace macro invocations in trailing expr position as Expr::Macro (#1420)

2.0.5

Expose ExprMacro data structure even when features="full" is not used (#1417)

2.0.4

Improve error reporting when parsing identifiers and paths (#1415, #1416)

2.0.3

Expose ExprGroup data structure even when features="full" is not used (#1412)

2.0.2

Documentation improvements

2.0.1

Add methods on syn::Meta for reporting error on an incorrect kind of attribute (#1409)

2.0.0

This release contains a batch of syntax tree improvements to incorporate ongoing Rust language development from the past 3.5 years since syn 1.

It never seems like an ideal time to finalize a syntax tree design, considering the frankly alarming number of syntax-disrupting language features currently in flight: keyword generics, restrictions, capabilities and contexts, conditional constness, new varieties of literals, dyn revamp such as explicitly dyn-safe traits and dyn-star, expression syntax in various phases of being added or being torn out (const blocks, try blocks, raw references), auto traits and negative impls, generalizations to higher rank trait bounds, async closures and static async trait methods, postfix keywords, pattern types, return type notation, unsafe attributes, …

The plan continues to be the same as laid out originally in the 1.0.0 release announcement:

Be aware that the underlying Rust language will continue to evolve. Syn is able to accommodate most kinds of Rust grammar changes via the nonexhaustive enums and Verbatim variants in the syntax tree, but we will plan to put out new major versions on a 12 to 24 month cadence to incorporate ongoing language changes as needed.

If anything, the takeaway from the 3.5 year longevity of syn 1 is that this period was tamer from a language development perspective than anticipated, but that is unlikely to last and I think around 24 months is still the correct cadence to expect between releases going forward.

... (truncated)

Commits

ac5f15d Release 2.0.13
856c5dd Pull in proc-macro2 1.0.55's Literal span fixes
9aae2b4 Merge pull request #1436 from dtolnay/floatsubspan
b0861b9 Ignore range_plus_one pedantic clippy lint
3b7c555 Improve spans of Expr::Field parsed from a float Literal
b80c69a Link to issues tracking unimplemented syntax
80d4248 Improve stderr filtering to handle compiletest's "revisions" mechanism
c001c26 Pass only .rs file paths to for_each_rust_file closure
f7b4ef3 Share repo walkdir logic between the 2 repo walk tests
ced12d4 Update "rust" repo benchmark to parse compiler and standard library only
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bits-bot · 2023-04-10T18:55:41Z

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neuronull · 2023-04-11T22:17:31Z

The only reason we include syn was as a secondary dependency from using darling.

darling v0.14.3 contains changes to use syn internally as a re export, thus not requiring us to explicitly include it.

We are using the Meta and Lit structs from syn within maybe_float_or_int()

The latest version of darling is still using syn 1.0.x (pre the 2.0 breaking changes that affect us).

I think this PR when merged and included in a release, would unblock us from being able to use the latest of darling , and not depend on syn directly anymore:

TedDriggs/darling#226

dependabot · 2023-04-13T19:08:57Z