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rustc: Don't use DelimToken::None if possible #44745

Merged
merged 1 commit into from
Sep 23, 2017
Merged

rustc: Don't use DelimToken::None if possible #44745

merged 1 commit into from
Sep 23, 2017

Commits on Sep 21, 2017

  1. rustc: Don't use DelimToken::None if possible 

    This commit fixes a regression from rust-lang#44601 where lowering attribute to HIR now
involves expanding interpolated tokens to their actual tokens. In that commit
all interpolated tokens were surrounded with a `DelimToken::None` group of
tokens, but this ended up causing regressions like rust-lang#44730 where the various
attribute parsers in `syntax/attr.rs` weren't ready to cope with
`DelimToken::None`. Instead of fixing the parser in `attr.rs` this commit
instead opts to just avoid the `DelimToken::None` in the first place, ensuring
that the token stream should look the same as it did before where possible.

Closes rust-lang#44730
    @alexcrichton
    alexcrichton committed Sep 21, 2017
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