diff options
Diffstat (limited to 'compiler/rustc_parse/src/parser/expr.rs')
| -rw-r--r-- | compiler/rustc_parse/src/parser/expr.rs | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/compiler/rustc_parse/src/parser/expr.rs b/compiler/rustc_parse/src/parser/expr.rs index c9629ea49e0..634e45c8480 100644 --- a/compiler/rustc_parse/src/parser/expr.rs +++ b/compiler/rustc_parse/src/parser/expr.rs @@ -21,8 +21,8 @@ use crate::errors::{ NoFieldsForFnCall, NotAsNegationOperator, NotAsNegationOperatorSub, OuterAttributeNotAllowedOnIfElse, ParenthesesWithStructFields, RequireColonAfterLabeledExpression, ShiftInterpretedAsGeneric, StructLiteralNotAllowedHere, - StructLiteralNotAllowedHereSugg, TildeAsUnaryOperator, UnexpectedTokenAfterLabel, - UnexpectedTokenAfterLabelSugg, WrapExpressionInParentheses, + StructLiteralNotAllowedHereSugg, TildeAsUnaryOperator, UnexpectedIfWithIf, + UnexpectedTokenAfterLabel, UnexpectedTokenAfterLabelSugg, WrapExpressionInParentheses, }; use crate::maybe_recover_from_interpolated_ty_qpath; use core::mem; @@ -2231,6 +2231,7 @@ impl<'a> Parser<'a> { if let Some(block) = recover_block_from_condition(self) { block } else { + self.error_on_extra_if(&cond)?; // Parse block, which will always fail, but we can add a nice note to the error self.parse_block().map_err(|mut err| { err.span_note( @@ -2367,6 +2368,16 @@ impl<'a> Parser<'a> { }); } + fn error_on_extra_if(&mut self, cond: &P<Expr>) -> PResult<'a, ()> { + if let ExprKind::Binary(Spanned { span: binop_span, node: binop}, _, right) = &cond.kind && + let BinOpKind::And = binop && + let ExprKind::If(cond, ..) = &right.kind { + Err(self.sess.create_err(UnexpectedIfWithIf(binop_span.shrink_to_hi().to(cond.span.shrink_to_lo())))) + } else { + Ok(()) + } + } + /// Parses `for <src_pat> in <src_expr> <src_loop_block>` (`for` token already eaten). fn parse_for_expr(&mut self, opt_label: Option<Label>, lo: Span) -> PResult<'a, P<Expr>> { // Record whether we are about to parse `for (`. |