Fix parsing of inclusive ranges (#214)

I'm not certain that this is correct, so extra eyes would be good

2 files changed, 8 insertions, 4 deletions

diff --git a/crates/ra_syntax/src/grammar/expressions.rs b/crates/ra_syntax/src/grammar/expressions.rs
index a9449c7bf..bca32f707 100644
--- a/crates/ra_syntax/src/grammar/expressions.rs
+++ b/crates/ra_syntax/src/grammar/expressions.rs
@@ -143,7 +143,7 @@ fn current_op(p: &Parser) -> (u8, Op) {
 
     let bp = match p.current() {
         EQ => 1,
-        DOTDOT => 2,
+        DOTDOT | DOTDOTEQ => 2,
         EQEQ | NEQ | L_ANGLE | R_ANGLE => 5,
         PIPE => 6,
         CARET => 7,
@@ -173,7 +173,7 @@ fn expr_bp(p: &mut Parser, r: Restrictions, bp: u8) -> BlockLike {
     };
 
     loop {
-        let is_range = p.current() == DOTDOT;
+        let is_range = p.current() == DOTDOT || p.current() == DOTDOTEQ;
         let (op_bp, op) = current_op(p);
         if op_bp < bp {
             break;
diff --git a/crates/ra_syntax/src/grammar/patterns.rs b/crates/ra_syntax/src/grammar/patterns.rs
index 10fa0e0be..64cdf0b1b 100644
--- a/crates/ra_syntax/src/grammar/patterns.rs
+++ b/crates/ra_syntax/src/grammar/patterns.rs
@@ -14,9 +14,13 @@ pub(super) fn pattern_r(p: &mut Parser, recovery_set: TokenSet) {
     if let Some(lhs) = atom_pat(p, recovery_set) {
         // test range_pat
         // fn main() {
-        //     match 92 { 0 ... 100 => () }
+        //     match 92 {
+        //         0 ... 100 => (),
+        //         101 ..= 200 => (),
+        //         200 .. 301=> (),
+        //     }
         // }
-        if p.at(DOTDOTDOT) {
+        if p.at(DOTDOTDOT) || p.at(DOTDOTEQ) || p.at(DOTDOT) {
             let m = lhs.precede(p);
             p.bump();
             atom_pat(p, recovery_set);