rust/tests/ui/consts/issue-90878-2.rs

 #![l=|x|[b;x ]] //~ ERROR attribute value must be a literal
//~^ ERROR cannot find attribute `l` in this scope

// notice the space at the start,
// we can't attach any attributes to this file because it needs to be at the start

// this example has been slightly modified (adding ]] at the end), so that it actually works here
// it still produces the same issue though

fn main() {}
Improve an error involving attribute values. Attribute values must be literals. The error you get when that doesn't hold is pretty bad, e.g.: ``` unexpected expression: 1 + 1 ``` You also get the same error if the attribute value is a literal, but an invalid literal, e.g.: ``` unexpected expression: "foo"suffix ``` This commit does two things. - Changes the error message to "attribute value must be a literal", which gives a better idea of what the problem is and how to fix it. It also no longer prints the invalid expression, because the carets below highlight it anyway. - Separates the "not a literal" case from the "invalid literal" case. Which means invalid literals now get the specific error at the literal level, rather than at the attribute level. 2023-12-11 22:55:50 +00:00			`#![l=\|x\|[b;x ]] //~ ERROR attribute value must be a literal`
Fix `non-constant value` ICE (#90878) This also fixes the same suggestion, which was kind of broken, because it just searched for the last occurence of `const` to replace with a `let`. This works great in some cases, but when there is no const and a leading space to the file, it doesn't work and panic with overflow because it thought that it had found a const. I also changed the suggestion to only trigger if the `const` and the non-constant value are on the same line, because if they aren't, the suggestion is very likely to be wrong. Also don't trigger the suggestion if the found `const` is on line 0, because that triggers the ICE. 2021-11-15 19:40:29 +00:00			//~^ ERROR cannot find attribute `l` in this scope

			`// notice the space at the start,`
			`// we can't attach any attributes to this file because it needs to be at the start`

			`// this example has been slightly modified (adding ]] at the end), so that it actually works here`
			`// it still produces the same issue though`

			`fn main() {}`