rust/tests/ui/macros/vec-macro-in-pattern.stderr

error: expected pattern, found `#`
  --> $DIR/vec-macro-in-pattern.rs:7:14
   |
LL |         Some(vec![43]) => {}
   |              ^^^^^^^^
   |              |
   |              expected pattern
   |              in this macro invocation
   |              this macro call doesn't expand to a pattern
   |
   = note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 1 previous error
Remove `__rust_force_expr`. This was added (with a different name) to improve an error message. It is no longer needed -- removing it changes the error message, but overall I think the new message is no worse: - the mention of `#` in the first line is a little worse, - but the extra context makes it very clear what the problem is, perhaps even clearer than the old message, - and the removal of the note about the `expr` fragment (an internal detail of `__rust_force_expr`) is an improvement. Overall I think the error is quite clear and still far better than the old message that prompted #61933, which didn't even mention patterns. The motivation for this is #124141, which will cause pasted metavariables to be tokenized and reparsed instead of the AST node being cached. This change in behaviour occasionally has a non-zero perf cost, and `__rust_force_expr` causes the tokenize/reparse step to occur twice. Removing `__rust_force_expr` greatly reduces the extra overhead for the `deep-vector` benchmark. 2024-06-23 06:12:39 +00:00			error: expected pattern, found `#`
Force vec! to expressions only 2021-01-16 15:32:51 +00:00			`--> $DIR/vec-macro-in-pattern.rs:7:14`
			`\|`
			`LL \| Some(vec![43]) => {}`
			`\| ^^^^^^^^`
Remove `__rust_force_expr`. This was added (with a different name) to improve an error message. It is no longer needed -- removing it changes the error message, but overall I think the new message is no worse: - the mention of `#` in the first line is a little worse, - but the extra context makes it very clear what the problem is, perhaps even clearer than the old message, - and the removal of the note about the `expr` fragment (an internal detail of `__rust_force_expr`) is an improvement. Overall I think the error is quite clear and still far better than the old message that prompted #61933, which didn't even mention patterns. The motivation for this is #124141, which will cause pasted metavariables to be tokenized and reparsed instead of the AST node being cached. This change in behaviour occasionally has a non-zero perf cost, and `__rust_force_expr` causes the tokenize/reparse step to occur twice. Removing `__rust_force_expr` greatly reduces the extra overhead for the `deep-vector` benchmark. 2024-06-23 06:12:39 +00:00			`\| \|`
			`\| expected pattern`
			`\| in this macro invocation`
			`\| this macro call doesn't expand to a pattern`
Force vec! to expressions only 2021-01-16 15:32:51 +00:00			`\|`
Show macro name in 'this error originates in macro' message When there are multiple macros in use, it can be difficult to tell which one was responsible for producing an error. 2021-02-13 19:52:25 +00:00			= note: this error originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
Force vec! to expressions only 2021-01-16 15:32:51 +00:00
Show number in error message even for one error Co-authored-by: Adrian <adrian.iosdev@gmail.com> 2023-11-21 15:44:16 +00:00			`error: aborting due to 1 previous error`
Force vec! to expressions only 2021-01-16 15:32:51 +00:00