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| author | Mazdak Farrokhzad <twingoow@gmail.com> | 2019-06-23 01:41:09 +0200 |
|---|---|---|
| committer | Mazdak Farrokhzad <twingoow@gmail.com> | 2019-06-23 01:41:09 +0200 |
| commit | c75f7ecaee508c568c0bc01c102965ce8b2246ef (patch) | |
| tree | c59e8fbe99bed1ddf64306ad4c09f32ddfc7daca | |
| parent | 7abb2350df361effc0f2f4bad938c42547fbb8ed (diff) | |
| download | rust-c75f7ecaee508c568c0bc01c102965ce8b2246ef.tar.gz rust-c75f7ecaee508c568c0bc01c102965ce8b2246ef.zip | |
let_chains: note re. back-compat wrt. expr beginning.
| -rw-r--r-- | src/libsyntax/ext/tt/macro_parser.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/libsyntax/ext/tt/macro_parser.rs b/src/libsyntax/ext/tt/macro_parser.rs index 0db6bd59afc..92ce3779a3c 100644 --- a/src/libsyntax/ext/tt/macro_parser.rs +++ b/src/libsyntax/ext/tt/macro_parser.rs @@ -825,7 +825,9 @@ fn may_begin_with(token: &Token, name: Name) -> bool { } match name { - sym::expr => token.can_begin_expr() && !token.is_keyword(kw::Let), + sym::expr => token.can_begin_expr() + // This exception is here for backwards compatibility. + && !token.is_keyword(kw::Let), sym::ty => token.can_begin_type(), sym::ident => get_macro_name(token).is_some(), sym::literal => token.can_begin_literal_or_bool(), |