Merge #366

366: parse minus before number literal pattern r=matklad a=csmoe

r?@matklad

![unknown](https://user-images.githubusercontent.com/35686186/50547871-d5449e00-0c7d-11e9-9ff5-1031e78019de.png)


Co-authored-by: csmoe <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/crates/ra_syntax/src/grammar/patterns.rs b/crates/ra_syntax/src/grammar/patterns.rs
index 64cdf0b1b..692ffbb8c 100644
--- a/crates/ra_syntax/src/grammar/patterns.rs
+++ b/crates/ra_syntax/src/grammar/patterns.rs
@@ -48,11 +48,16 @@ fn atom_pat(p: &mut Parser, recovery_set: TokenSet) -> Option<CompletedMarker> {
     // test literal_pattern
     // fn main() {
     //     match () {
+    //         -1 => (),
     //         92 => (),
     //         'c' => (),
     //         "hello" => (),
     //     }
     // }
+    if p.at(MINUS) && (p.nth(1) == INT_NUMBER || p.nth(1) == FLOAT_NUMBER) {
+        p.bump();
+    }
+
     if let Some(m) = expressions::literal(p) {
         return Some(m);
     }