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No reserved_prefix suggestion in proc macro call_site.

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Mara Bos 2021-06-14 20:38:57 +00:00 committed by lrh2000
parent c7f7c2efe0
commit 7490305e13
1 changed files with 13 additions and 11 deletions
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24
compiler/rustc_parse/src/lexer/mod.rs
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@ -8,7 +8,7 @@ use rustc_session::lint::builtin::RESERVED_PREFIX;
use rustc_session::lint::BuiltinLintDiagnostics;
use rustc_session::parse::ParseSess;
use rustc_span::symbol::{sym, Symbol};
use rustc_span::{BytePos, Pos, Span};
use rustc_span::{edition::Edition, BytePos, Pos, Span};
use tracing::debug;
@ -507,20 +507,22 @@ impl<'a> StringReader<'a> {
let prefix_span = self.mk_sp(start, self.pos);
let msg = format!("prefix `{}` is unknown", self.str_from_to(start, self.pos));
if prefix_span.rust_2021() {
let expn_data = prefix_span.ctxt().outer_expn_data();
if expn_data.edition >= Edition::Edition2021 {
// In Rust 2021, this is a hard error.
self.sess
.span_diagnostic
.struct_span_err(prefix_span, &msg)
.span_label(prefix_span, "unknown prefix")
.span_suggestion_verbose(
self.mk_sp(self.pos, self.pos),
let mut err = self.sess.span_diagnostic.struct_span_err(prefix_span, &msg);
err.span_label(prefix_span, "unknown prefix");
if expn_data.is_root() {
err.span_suggestion_verbose(
prefix_span.shrink_to_hi(),
"consider inserting whitespace here",
" ".into(),
Applicability::MachineApplicable,
)
.note("prefixed identifiers and literals are reserved since Rust 2021")
.emit();
);
}
err.note("prefixed identifiers and literals are reserved since Rust 2021");
err.emit();
} else {
// Before Rust 2021, only emit a lint for migration.
self.sess.buffer_lint_with_diagnostic(