Yutaro Ohno 0e42298674 parser: provide better errors on closures with braces missing ... We currently provide wrong suggestions and unhelpful errors on closure bodies with braces missing. For example, given the following code: ``` fn main() { let _x = Box::new(|x|x+1;); } ``` the current output is like this: ``` error: expected expression, found `)` --> ./main.rs:2:30 | 2 | let _x = Box::new(|x|x+1;); | ^ expected expression error: closure bodies that contain statements must be surrounded by braces --> ./main.rs:2:25 | 2 | let _x = Box::new(|x|x+1;); | ^ 3 | } | ^ | ... help: try adding braces | 2 ~ let _x = Box::new(|x| {x+1;); 3 ~ }} ... error: expected `;`, found `}` --> ./main.rs:2:32 | 2 | let _x = Box::new(|x|x+1;); | ^ help: add `;` here 3 | } | - unexpected token error: aborting due to 3 previous errors ``` This commit allows outputting correct suggestions and errors. The above code would output like this: ``` error: closure bodies that contain statements must be surrounded by braces --> ./main.rs:2:25 | 2 | let _x = Box::new(|x|x+1;); | ^ ^ | note: statement found outside of a block --> ./main.rs:2:29 | 2 | let _x = Box::new(|x|x+1;); | ---^ this `;` turns the preceding closure into a statement | | | this expression is a statement because of the trailing semicolon note: the closure body may be incorrectly delimited --> ./main.rs:2:23 | 2 | let _x = Box::new(|x|x+1;); | ^^^^^^ - ...but likely you meant the closure to end here | | | this is the parsed closure... help: try adding braces | 2 | let _x = Box::new(|x| {x+1;}); | + + error: aborting due to previous error ```		2023-02-23 19:05:13 +09:00
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compound-assignment
if
malformed_closure
if-bot.rs