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Use token::Lit in ast::ExprKind::Lit.

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Instead of `ast::Lit`.

Literal lowering now happens at two different times. Expression literals
are lowered when HIR is crated. Attribute literals are lowered during
parsing.

This commit changes the language very slightly. Some programs that used
to not compile now will compile. This is because some invalid literals
that are removed by `cfg` or attribute macros will no longer trigger
errors. See this comment for more details:
https://github.com/rust-lang/rust/pull/102944#issuecomment-1277476773
This commit is contained in:
Nicholas Nethercote
2022-10-10 13:40:56 +11:00
parent 01760265cb
commit 358a603f11
45 changed files with 701 additions and 581 deletions
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15
compiler/rustc_lint/src/hidden_unicode_codepoints.rs
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@@ -123,23 +123,22 @@ impl EarlyLintPass for HiddenUnicodeCodepoints {
fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &ast::Expr) {
// byte strings are already handled well enough by `EscapeError::NonAsciiCharInByteString`
let (text, span, padding) = match &expr.kind {
ast::ExprKind::Lit(ast::Lit { token_lit, kind, span }) => {
match &expr.kind {
ast::ExprKind::Lit(token_lit) => {
let text = token_lit.symbol;
if !contains_text_flow_control_chars(text.as_str()) {
return;
}
let padding = match kind {
let padding = match token_lit.kind {
// account for `"` or `'`
ast::LitKind::Str(_, ast::StrStyle::Cooked) | ast::LitKind::Char(_) => 1,
ast::token::LitKind::Str | ast::token::LitKind::Char => 1,
// account for `r###"`
ast::LitKind::Str(_, ast::StrStyle::Raw(val)) => *val as u32 + 2,
ast::token::LitKind::StrRaw(n) => n as u32 + 2,
_ => return,
};
(text, span, padding)
self.lint_text_direction_codepoint(cx, text, expr.span, padding, true, "literal");
}
_ => return,
_ => {}
};
self.lint_text_direction_codepoint(cx, text, *span, padding, true, "literal");
}
}