diff options
Diffstat (limited to 'compiler/rustc_parse/src')
| -rw-r--r-- | compiler/rustc_parse/src/lexer/mod.rs | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/compiler/rustc_parse/src/lexer/mod.rs b/compiler/rustc_parse/src/lexer/mod.rs index f5eba5056ea..f50e8a8db01 100644 --- a/compiler/rustc_parse/src/lexer/mod.rs +++ b/compiler/rustc_parse/src/lexer/mod.rs @@ -1,9 +1,11 @@ -use rustc_ast::ast::AttrStyle; +use rustc_ast::ast::{self, AttrStyle}; use rustc_ast::token::{self, CommentKind, Token, TokenKind}; use rustc_ast::tokenstream::{Spacing, TokenStream}; use rustc_errors::{error_code, Applicability, DiagnosticBuilder, FatalError, PResult}; use rustc_lexer::unescape::{self, Mode}; use rustc_lexer::{Base, DocStyle, RawStrError}; +use rustc_session::lint::builtin::RESERVED_PREFIX; +use rustc_session::lint::BuiltinLintDiagnostics; use rustc_session::parse::ParseSess; use rustc_span::edition::Edition; use rustc_span::symbol::{sym, Symbol}; @@ -498,17 +500,24 @@ impl<'a> StringReader<'a> { FatalError.raise() } + // See RFC 3101. fn report_reserved_prefix(&self, start: BytePos) { - // See RFC 3101. + let prefix_span = self.mk_sp(start, self.pos); + let msg = format!("prefix `{}` is unknown", self.str_from_to(start, self.pos)); + if self.sess.edition < Edition::Edition2021 { + self.sess.buffer_lint_with_diagnostic( + &RESERVED_PREFIX, + prefix_span, + ast::CRATE_NODE_ID, + &msg, + BuiltinLintDiagnostics::ReservedPrefix(prefix_span), + ); return; } - let mut err = self.sess.span_diagnostic.struct_span_err( - self.mk_sp(start, self.pos), - &format!("prefix `{}` is unknown", self.str_from_to(start, self.pos)), - ); - err.span_label(self.mk_sp(start, self.pos), "unknown prefix"); + let mut err = self.sess.span_diagnostic.struct_span_err(prefix_span, &msg); + err.span_label(prefix_span, "unknown prefix"); err.span_suggestion_verbose( self.mk_sp(self.pos, self.pos), "consider inserting whitespace here", |