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authorbors[bot] <26634292+bors[bot]@users.noreply.github.com>2021-03-07 00:32:56 +0000
committerGitHub <[email protected]>2021-03-07 00:32:56 +0000
commitf0b7c02f16f717744e7edc79a405db14110393cf (patch)
treec0aaf8373aa42ce3b4037fad2f42efba07680f53 /docs/dev
parent07a54f7ae451451292e3282f1e7defb4391b766f (diff)
parentaea974939064b0f7b83de371a93ee4190c80e544 (diff)
Merge #7892
7892: Fix TokenStream::from_str for input consisting of a single group with delimiter r=edwin0cheng a=kevinmehall TokenStream holds a `tt::Subtree` but assumes its `delimiter` is always `None`. In particular, the iterator implementation iterates over the inner `token_trees` and ignores the `delimiter`. However, `TokenStream::from_str` violated this assumption when the input consists of a single group by producing a Subtree with an outer delimiter, which was ignored as seen by a procedural macro. `tt::Subtree` is just `pub delimiter: Option<Delimiter>, pub token_trees: Vec<TokenTree>`, so a Subtree that is statically guaranteed not to have a delimiter is just `Vec<TokenTree>`. Fixes #7810 Fixes #7875 Co-authored-by: Kevin Mehall <[email protected]>
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