bjoernager/rust
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Give a helpful error for the mistake ..==

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This commit is contained in:
Aris Merchant 2021-06-25 19:46:41 -07:00 • committed by inquisitivecrystal
parent 72568552fd
commit fd406a8865
2 changed files with 42 additions and 7 deletions
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10
compiler/rustc_parse/src/parser/expr.rs
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@ -431,7 +431,8 @@ impl<'a> Parser<'a> {
let span = self.mk_expr_sp(&lhs, lhs.span, rhs_span);
let limits =
if op == AssocOp::DotDot { RangeLimits::HalfOpen } else { RangeLimits::Closed };
Ok(self.mk_expr(span, self.mk_range(Some(lhs), rhs, limits), AttrVec::new()))
let range = self.mk_range(Some(lhs), rhs, limits);
Ok(self.mk_expr(span, range, AttrVec::new()))
}
fn is_at_start_of_range_notation_rhs(&self) -> bool {
@ -479,7 +480,8 @@ impl<'a> Parser<'a> {
} else {
(lo, None)
};
Ok(this.mk_expr(span, this.mk_range(None, opt_end, limits), attrs.into()))
let range = this.mk_range(None, opt_end, limits);
Ok(this.mk_expr(span, range, attrs.into()))
})
}
@ -2517,13 +2519,13 @@ impl<'a> Parser<'a> {
}
fn mk_range(
&self,
&mut self,
start: Option<P<Expr>>,
end: Option<P<Expr>>,
limits: RangeLimits,
) -> ExprKind {
if end.is_none() && limits == RangeLimits::Closed {
self.error_inclusive_range_with_no_end(self.prev_token.span);
self.inclusive_range_with_incorrect_end(self.prev_token.span);
ExprKind::Err
} else {
ExprKind::Range(start, end, limits)