bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Handle Spans for byte and raw strings and add more detail

Browse source
This commit is contained in:
Esteban Küber 2021-01-23 12:48:31 -08:00
parent b81f5811f9
commit 3b5d018ebb
35 changed files with 279 additions and 184 deletions
Download patch file Download diff file Expand all files Collapse all files

30
compiler/rustc_parse/src/lexer/mod.rs
View file

@ -14,7 +14,7 @@ mod tokentrees;
mod unescape_error_reporting;
mod unicode_chars;
use unescape_error_reporting::{emit_unescape_error, push_escaped_char};
use unescape_error_reporting::{emit_unescape_error, escaped_char};
#[derive(Clone, Debug)]
pub struct UnmatchedBrace {
@ -122,11 +122,9 @@ impl<'a> StringReader<'a> {
m: &str,
c: char,
) -> DiagnosticBuilder<'a> {
let mut m = m.to_string();
m.push_str(": ");
push_escaped_char(&mut m, c);
self.sess.span_diagnostic.struct_span_fatal(self.mk_sp(from_pos, to_pos), &m[..])
self.sess
.span_diagnostic
.struct_span_fatal(self.mk_sp(from_pos, to_pos), &format!("{}: {}", m, escaped_char(c)))
}
/// Turns simple `rustc_lexer::TokenKind` enum into a rich
@ -421,7 +419,7 @@ impl<'a> StringReader<'a> {
let content_start = start + BytePos(prefix_len);
let content_end = suffix_start - BytePos(postfix_len);
let id = self.symbol_from_to(content_start, content_end);
self.validate_literal_escape(mode, content_start, content_end);
self.validate_literal_escape(mode, content_start, content_end, prefix_len, postfix_len);
(lit_kind, id)
}
@ -525,17 +523,29 @@ impl<'a> StringReader<'a> {
.raise();
}
fn validate_literal_escape(&self, mode: Mode, content_start: BytePos, content_end: BytePos) {
fn validate_literal_escape(
&self,
mode: Mode,
content_start: BytePos,
content_end: BytePos,
prefix_len: u32,
postfix_len: u32,
) {
let lit_content = self.str_from_to(content_start, content_end);
unescape::unescape_literal(lit_content, mode, &mut |range, result| {
// Here we only check for errors. The actual unescaping is done later.
if let Err(err) = result {
let span_with_quotes =
self.mk_sp(content_start - BytePos(1), content_end + BytePos(1));
let span_with_quotes = self
.mk_sp(content_start - BytePos(prefix_len), content_end + BytePos(postfix_len));
let (start, end) = (range.start as u32, range.end as u32);
let lo = content_start + BytePos(start);
let hi = lo + BytePos(end - start);
let span = self.mk_sp(lo, hi);
emit_unescape_error(
&self.sess.span_diagnostic,
lit_content,
span_with_quotes,
span,
mode,
range,
err,