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Improve error message for let-in-expr-position

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This commit is contained in:
Manish Goregaokar 2016-01-26 13:53:28 +05:30
parent d829019ff4
commit 065e47eb3b
2 changed files with 4 additions and 3 deletions
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5
src/libsyntax/parse/parser.rs
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@ -2221,8 +2221,9 @@ impl<'a> Parser<'a> {
} else if self.token.is_keyword(keywords::Let) { } else if self.token.is_keyword(keywords::Let) {
// Catch this syntax error here, instead of in `check_strict_keywords`, so // Catch this syntax error here, instead of in `check_strict_keywords`, so
// that we can explicitly mention that let is not to be used as an expression // that we can explicitly mention that let is not to be used as an expression
let msg = "`let` is not an expression, so it cannot be used in this way"; let mut db = self.fatal("expected expression, found statement (`let`)");
return Err(self.fatal(&msg)); db.note("variable declaration using `let` is a statement");
return Err(db);
} else if self.check(&token::ModSep) || } else if self.check(&token::ModSep) ||
self.token.is_ident() && self.token.is_ident() &&
!self.check_keyword(keywords::True) && !self.check_keyword(keywords::True) &&

2
src/test/run-fail-fulldeps/qquote.rs
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@ -10,7 +10,7 @@
// ignore-cross-compile // ignore-cross-compile
// error-pattern:`let` is not an expression, so it cannot be used in this way // error-pattern:expected expression, found statement (`let`)
#![feature(quote, rustc_private)] #![feature(quote, rustc_private)]