bjoernager/rust
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Recover on invalid operators <> and <=>

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This commit is contained in:
r00ster91 2021-12-06 18:55:58 +01:00
parent 0fb1c371d4
commit f194c9b26a
5 changed files with 57 additions and 1 deletions
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34
compiler/rustc_parse/src/parser/expr.rs
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@ -213,11 +213,11 @@ impl<'a> Parser<'a> {
}
}
// Look for JS' `===` and `!==` and recover
if (op.node == AssocOp::Equal || op.node == AssocOp::NotEqual)
&& self.token.kind == token::Eq
&& self.prev_token.span.hi() == self.token.span.lo()
{
// Look for JS' `===` and `!==` and recover 😇
let sp = op.span.to(self.token.span);
let sugg = match op.node {
AssocOp::Equal => "==",
@ -235,6 +235,38 @@ impl<'a> Parser<'a> {
self.bump();
}
// Look for PHP's `<>` and recover
if op.node == AssocOp::Less
&& self.token.kind == token::Gt
&& self.prev_token.span.hi() == self.token.span.lo()
{
let sp = op.span.to(self.token.span);
self.struct_span_err(sp, "invalid comparison operator `<>`")
.span_suggestion_short(
sp,
"`<>` is not a valid comparison operator, use `!=`",
"!=".to_string(),
Applicability::MachineApplicable,
)
.emit();
self.bump();
}
// Look for C++'s `<=>` and recover
if op.node == AssocOp::LessEqual
&& self.token.kind == token::Gt
&& self.prev_token.span.hi() == self.token.span.lo()
{
let sp = op.span.to(self.token.span);
self.struct_span_err(sp, "invalid comparison operator `<=>`")
.span_label(
sp,
"`<=>` is not a valid comparison operator, use `std::cmp::Ordering`",
)
.emit();
self.bump();
}
let op = op.node;
// Special cases:
if op == AssocOp::As {