bjoernager/rust
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Add ErrorGuaranteed to ast::LitKind::Err, token::LitKind::Err.

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This mostly works well, and eliminates a couple of delayed bugs.

One annoying thing is that we should really also add an
`ErrorGuaranteed` to `proc_macro::bridge::LitKind::Err`. But that's
difficult because `proc_macro` doesn't have access to `ErrorGuaranteed`,
so we have to fake it.
This commit is contained in:
Nicholas Nethercote 2024-02-14 20:12:05 +11:00
parent 332c57723a
commit 25ed6e43b0
26 changed files with 85 additions and 64 deletions
Download patch file Download diff file Expand all files Collapse all files

22
compiler/rustc_parse/src/lexer/mod.rs
View file

@ -481,8 +481,8 @@ impl<'sess, 'src> StringReader<'sess, 'src> {
let mut kind = token::Integer;
if empty_int {
let span = self.mk_sp(start, end);
self.dcx().emit_err(errors::NoDigitsLiteral { span });
kind = token::Err;
let guar = self.dcx().emit_err(errors::NoDigitsLiteral { span });
kind = token::Err(guar);
} else if matches!(base, Base::Binary | Base::Octal) {
let base = base as u32;
let s = self.str_from_to(start + BytePos(2), end);
@ -492,8 +492,9 @@ impl<'sess, 'src> StringReader<'sess, 'src> {
start + BytePos::from_usize(2 + idx + c.len_utf8()),
);
if c != '_' && c.to_digit(base).is_none() {
self.dcx().emit_err(errors::InvalidDigitLiteral { span, base });
kind = token::Err;
let guar =
self.dcx().emit_err(errors::InvalidDigitLiteral { span, base });
kind = token::Err(guar);
}
}
}
@ -711,7 +712,7 @@ impl<'sess, 'src> StringReader<'sess, 'src> {
let hi = lo + BytePos(end - start);
let span = self.mk_sp(lo, hi);
let is_fatal = err.is_fatal();
if let Some(_guar) = emit_unescape_error(
if let Some(guar) = emit_unescape_error(
self.dcx(),
lit_content,
span_with_quotes,
@ -721,18 +722,19 @@ impl<'sess, 'src> StringReader<'sess, 'src> {
err,
) {
assert!(is_fatal);
kind = token::Err;
kind = token::Err(guar);
}
}
});
// We normally exclude the quotes for the symbol, but for errors we
// include it because it results in clearer error messages.
if kind != token::Err {
(kind, Symbol::intern(lit_content))
let sym = if !matches!(kind, token::Err(_)) {
Symbol::intern(lit_content)
} else {
(token::Err, self.symbol_from_to(start, end))
}
self.symbol_from_to(start, end)
};
(kind, sym)
}
fn cook_unicode(

4
compiler/rustc_parse/src/parser/expr.rs
View file

@ -2140,12 +2140,12 @@ impl<'a> Parser<'a> {
Err(err) => {
let span = token.uninterpolated_span();
self.bump();
report_lit_error(self.sess, err, lit, span);
let guar = report_lit_error(self.sess, err, lit, span);
// Pack possible quotes and prefixes from the original literal into
// the error literal's symbol so they can be pretty-printed faithfully.
let suffixless_lit = token::Lit::new(lit.kind, lit.symbol, None);
let symbol = Symbol::intern(&suffixless_lit.to_string());
let lit = token::Lit::new(token::Err, symbol, lit.suffix);
let lit = token::Lit::new(token::Err(guar), symbol, lit.suffix);
Some(
MetaItemLit::from_token_lit(lit, span)
.unwrap_or_else(|_| unreachable!()),

2
compiler/rustc_parse/src/parser/mod.rs
View file

@ -1459,7 +1459,7 @@ impl<'a> Parser<'a> {
match self.parse_str_lit() {
Ok(str_lit) => Some(str_lit),
Err(Some(lit)) => match lit.kind {
ast::LitKind::Err => None,
ast::LitKind::Err(_) => None,
_ => {
self.dcx().emit_err(NonStringAbiLiteral { span: lit.span });
None

4
compiler/rustc_parse/src/validate_attr.rs
View file

@ -70,11 +70,11 @@ pub fn parse_meta<'a>(sess: &'a ParseSess, attr: &Attribute) -> PResult<'a, Meta
}
}
Err(err) => {
report_lit_error(sess, err, token_lit, expr.span);
let guar = report_lit_error(sess, err, token_lit, expr.span);
let lit = ast::MetaItemLit {
symbol: token_lit.symbol,
suffix: token_lit.suffix,
kind: ast::LitKind::Err,
kind: ast::LitKind::Err(guar),
span: expr.span,
};
MetaItemKind::NameValue(lit)