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Add underscore expressions for destructuring assignments

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Co-authored-by: varkor <github@varkor.com>
This commit is contained in:
Fabian Zaiser 2020-11-11 13:15:15 +00:00
parent a38f8fb674
commit 8cf3564310
27 changed files with 243 additions and 45 deletions
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3
compiler/rustc_parse/src/parser/expr.rs
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@ -1089,6 +1089,9 @@ impl<'a> Parser<'a> {
self.parse_yield_expr(attrs)
} else if self.eat_keyword(kw::Let) {
self.parse_let_expr(attrs)
} else if self.eat_keyword(kw::Underscore) {
self.sess.gated_spans.gate(sym::destructuring_assignment, self.prev_token.span);
Ok(self.mk_expr(self.prev_token.span, ExprKind::Underscore, attrs))
} else if !self.unclosed_delims.is_empty() && self.check(&token::Semi) {
// Don't complain about bare semicolons after unclosed braces
// recovery in order to keep the error count down. Fixing the