From b454eb5a600779a9ab6f7bea251772bdd98b81b9 Mon Sep 17 00:00:00 2001
From: Edwin Cheng <edwin0cheng@gmail.com>
Date: Tue, 30 Apr 2019 23:22:48 +0800
Subject: Add macro pat parsing

---
 crates/ra_parser/src/grammar/patterns.rs           | 11 ++++++-
 .../tests/data/parser/inline/ok/0129_marco_pat.rs  |  3 ++
 .../tests/data/parser/inline/ok/0129_marco_pat.txt | 36 ++++++++++++++++++++++
 3 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100644 crates/ra_syntax/tests/data/parser/inline/ok/0129_marco_pat.rs
 create mode 100644 crates/ra_syntax/tests/data/parser/inline/ok/0129_marco_pat.txt

diff --git a/crates/ra_parser/src/grammar/patterns.rs b/crates/ra_parser/src/grammar/patterns.rs
index 03fa9b71e..12dd22bde 100644
--- a/crates/ra_parser/src/grammar/patterns.rs
+++ b/crates/ra_parser/src/grammar/patterns.rs
@@ -40,6 +40,15 @@ pub(super) fn pattern_r(p: &mut Parser, recovery_set: TokenSet) {
             atom_pat(p, recovery_set);
             m.complete(p, RANGE_PAT);
         }
+        // test marco_pat
+        // fn main() {
+        //     let m!(x) = 0;
+        // }
+        else if lhs.kind() == PATH_PAT && p.at(EXCL) {
+            let m = lhs.precede(p);
+            items::macro_call_after_excl(p);
+            m.complete(p, MACRO_CALL);
+        }
     }
 }
 
@@ -51,7 +60,7 @@ fn atom_pat(p: &mut Parser, recovery_set: TokenSet) -> Option<CompletedMarker> {
     let la1 = p.nth(1);
     if la0 == REF_KW
         || la0 == MUT_KW
-        || (la0 == IDENT && !(la1 == COLONCOLON || la1 == L_PAREN || la1 == L_CURLY))
+        || (la0 == IDENT && !(la1 == COLONCOLON || la1 == L_PAREN || la1 == L_CURLY || la1 == EXCL))
     {
         return Some(bind_pat(p, true));
     }
diff --git a/crates/ra_syntax/tests/data/parser/inline/ok/0129_marco_pat.rs b/crates/ra_syntax/tests/data/parser/inline/ok/0129_marco_pat.rs
new file mode 100644
index 000000000..811181d9b
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/inline/ok/0129_marco_pat.rs
@@ -0,0 +1,3 @@
+fn main() {
+    let m!(x) = 0;
+}
diff --git a/crates/ra_syntax/tests/data/parser/inline/ok/0129_marco_pat.txt b/crates/ra_syntax/tests/data/parser/inline/ok/0129_marco_pat.txt
new file mode 100644
index 000000000..50b4ab2e7
--- /dev/null
+++ b/crates/ra_syntax/tests/data/parser/inline/ok/0129_marco_pat.txt
@@ -0,0 +1,36 @@
+SOURCE_FILE@[0; 33)
+  FN_DEF@[0; 32)
+    FN_KW@[0; 2) "fn"
+    WHITESPACE@[2; 3) " "
+    NAME@[3; 7)
+      IDENT@[3; 7) "main"
+    PARAM_LIST@[7; 9)
+      L_PAREN@[7; 8) "("
+      R_PAREN@[8; 9) ")"
+    WHITESPACE@[9; 10) " "
+    BLOCK@[10; 32)
+      L_CURLY@[10; 11) "{"
+      WHITESPACE@[11; 16) "\n    "
+      LET_STMT@[16; 30)
+        LET_KW@[16; 19) "let"
+        WHITESPACE@[19; 20) " "
+        MACRO_CALL@[20; 25)
+          PATH_PAT@[20; 21)
+            PATH@[20; 21)
+              PATH_SEGMENT@[20; 21)
+                NAME_REF@[20; 21)
+                  IDENT@[20; 21) "m"
+          EXCL@[21; 22) "!"
+          TOKEN_TREE@[22; 25)
+            L_PAREN@[22; 23) "("
+            IDENT@[23; 24) "x"
+            R_PAREN@[24; 25) ")"
+        WHITESPACE@[25; 26) " "
+        EQ@[26; 27) "="
+        WHITESPACE@[27; 28) " "
+        LITERAL@[28; 29)
+          INT_NUMBER@[28; 29) "0"
+        SEMI@[29; 30) ";"
+      WHITESPACE@[30; 31) "\n"
+      R_CURLY@[31; 32) "}"
+  WHITESPACE@[32; 33) "\n"
-- 
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