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Rollup merge of #124099 - voidc:disallow-ambiguous-expr-attrs, r=davidtwco

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Disallow ambiguous attributes on expressions

This implements the suggestion in [#15701](https://github.com/rust-lang/rust/issues/15701#issuecomment-2033124217) to disallow ambiguous outer attributes on expressions. This should resolve one of the concerns blocking the stabilization of `stmt_expr_attributes`.
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Matthias Krüger 2024-04-23 12:10:26 +02:00 • committed by GitHub
commit 57dad1d75e
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15 changed files with 141 additions and 49 deletions
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compiler/rustc_parse/messages.ftl
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@ -624,6 +624,8 @@ parse_or_pattern_not_allowed_in_let_binding = top-level or-patterns are not allo
parse_out_of_range_hex_escape = out of range hex escape
.label = must be a character in the range [\x00-\x7f]
parse_outer_attr_ambiguous = ambiguous outer attributes
parse_outer_attr_explanation = outer attributes, like `#[test]`, annotate the item following them
parse_outer_attribute_not_allowed_on_if_else = outer attributes are not allowed on `if` and `else` branches