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lines changed Original file line number Diff line number Diff line change @@ -742,6 +742,16 @@ impl<'a> StringReader<'a> {
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valid
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}
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}
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+ 'u' => {
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+ self . err_span_ (
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+ escaped_pos,
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+ self . last_pos ,
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+ "`\\ u` in string literals start unicode escape sequences; \
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+ for example, use `\\ u{30a2}` to specify codepoint U+30A2, \
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+ or did you mean `\\ \\ u`?"
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+ ) ;
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+ false
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+ }
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'\n' if delim == '"' => {
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self . consume_whitespace ( ) ;
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true
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+ // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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+ // file at the top-level directory of this distribution and at
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+ // http://rust-lang.org/COPYRIGHT.
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+ //
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+ // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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+ // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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+ // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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+ // option. This file may not be copied, modified, or distributed
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+ // except according to those terms.
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+
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+ // Test that a covariant struct permits the lifetime of a reference to
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+ // be shortened.
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+
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+ fn main ( ) { "\u123" ; }
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+ //~^ error: `\u` in string literals start unicode escape sequences; for example, use `\u{30a2}`
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