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On incorrect cfg literal/identifier, point at the right span #58961

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merged 2 commits into from
Mar 9, 2019
Merged

On incorrect cfg literal/identifier, point at the right span #58961

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669be1a
On incorrect cfg literal/identifier, point at the right span
estebank Mar 6, 2019
02eb523
Surround found token with `
estebank Mar 6, 2019
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4 changes: 2 additions & 2 deletions src/libsyntax/parse/attr.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -285,8 +285,8 @@ impl<'a> Parser<'a> {
}

let found = self.this_token_to_string();
let msg = format!("expected unsuffixed literal or identifier, found {}", found);
Err(self.diagnostic().struct_span_err(lo, &msg))
let msg = format!("expected unsuffixed literal or identifier, found `{}`", found);
Err(self.diagnostic().struct_span_err(self.span, &msg))
}

/// matches meta_seq = ( COMMASEP(meta_item_inner) )
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2 changes: 1 addition & 1 deletion src/test/ui/conditional-compilation/cfg-attr-syntax-validation.rs
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Expand Up @@ -28,7 +28,7 @@ struct S9;
macro_rules! generate_s10 {
($expr: expr) => {
#[cfg(feature = $expr)]
//~^ ERROR expected unsuffixed literal or identifier, found concat!("nonexistent")
//~^ ERROR expected unsuffixed literal or identifier, found `concat!("nonexistent")`
struct S10;
}
}
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6 changes: 3 additions & 3 deletions src/test/ui/conditional-compilation/cfg-attr-syntax-validation.stderr
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Expand Up @@ -52,11 +52,11 @@ error[E0565]: literal in `cfg` predicate value must be a string
LL | #[cfg(a = b"hi")] //~ ERROR literal in `cfg` predicate value must be a string
| ^^^^^ help: consider removing the prefix: `"hi"`

error: expected unsuffixed literal or identifier, found concat!("nonexistent")
--> $DIR/cfg-attr-syntax-validation.rs:30:15
error: expected unsuffixed literal or identifier, found `concat!("nonexistent")`
--> $DIR/cfg-attr-syntax-validation.rs:30:25
|
LL | #[cfg(feature = $expr)]
| ^^^^^^^
| ^^^^^
...
LL | generate_s10!(concat!("nonexistent"));
| -------------------------------------- in this macro invocation
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