9b75a43881
Update `expr` matcher for Edition 2024 and add `expr_2021` nonterminal
This commit adds a new nonterminal `expr_2021` in macro patterns, and `expr_fragment_specifier_2024` feature flag.
This change also updates `expr` so that on Edition 2024 it will also match `const { ... }` blocks, while `expr_2021` preserves the current behavior of `expr`, matching expressions without `const` blocks.
Joint work with `@vincenzopalazzo.`
Issue #123742
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| .. | ||
| lexer | ||
| parser | ||
| errors.rs | ||
| lib.rs | ||
| validate_attr.rs | ||