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lexer: do not display char confusingly in error message

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Current code leads to messages like "... use a \xHH escape: \u{e4}"
which is confusing.

The printed span already points to the offending character, which
should be enough to identify the non-ASCII problem.

Fixes: #29088
This commit is contained in:
Georg Brandl
2016-05-02 07:44:21 +02:00
parent 855fb61922
commit 9e2300015b
1 changed files with 4 additions and 5 deletions
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9
src/libsyntax/parse/lexer/mod.rs
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@@ -931,11 +931,10 @@ impl<'a> StringReader<'a> {
_ => { _ => {
if ascii_only && first_source_char > '\x7F' { if ascii_only && first_source_char > '\x7F' {
let last_pos = self.last_pos; let last_pos = self.last_pos;
self.err_span_char(start, self.err_span_(start,
last_pos, last_pos,
"byte constant must be ASCII. Use a \\xHH escape for a \ "byte constant must be ASCII. Use a \\xHH escape for a \
non-ASCII byte", non-ASCII byte");
first_source_char);
return false; return false;
} }
} }