Wrong highlighting for the first pattern of a `match` when it starts with a pipe

[danielhenrymantilla]

Sublime Text Version

Sublime Text 3.2 (Build 3200) (when tested on Windows)

Rust Enhanced Version

2.19.0 (when tested on Windows)

Operating system

Tested on both Linux Mint and Windows 10

Expected behavior

From the Rust reference, regarding match grammar:

MatchArmPatterns :
   |? Pattern ( | Pattern )*

are valid MatchArmPatterns and should be colored accordingly.

Actual behavior

But the optional first pipe (|) sygil, when used right after the opening brace of the match expression leads to an incorrect syntax highlighting (might be related to closure syntax).

The current work around is to add a comment between the opening brace and the first pattern.

Steps to reproduce

1. fn main ()
   {
       match None { 
           | Some(42) /* <- not highlighted */ => {},
           | Some(x) => {},
           | None => {}
       }
   } 

2. fn main ()
   {
       match None {//
           | Some(42) /* <- good highlighting */ => {},
           | Some(x) => {},
           | None => {}
       }
   } 

References

Maybe #284

[ehuss]

Thanks, I think this is 24 on the list in #284. The issue is that it is being confused with a closure. I think the solution is to add special handling for match blocks.