From a0a347eac941e93165c5b2728010bfbcb6ae9549 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sat, 8 Sep 2018 10:28:53 +0300
Subject: Don't get stuck in macros

---
 crates/libsyntax2/src/grammar/items/mod.rs         |  7 +++-
 .../tests/data/parser/err/0023_mismatched_paren.rs |  5 +++
 .../data/parser/err/0023_mismatched_paren.txt      | 43 ++++++++++++++++++++++
 3 files changed, 54 insertions(+), 1 deletion(-)
 create mode 100644 crates/libsyntax2/tests/data/parser/err/0023_mismatched_paren.rs
 create mode 100644 crates/libsyntax2/tests/data/parser/err/0023_mismatched_paren.txt

(limited to 'crates')

diff --git a/crates/libsyntax2/src/grammar/items/mod.rs b/crates/libsyntax2/src/grammar/items/mod.rs
index 5466146b4..57742ecb9 100644
--- a/crates/libsyntax2/src/grammar/items/mod.rs
+++ b/crates/libsyntax2/src/grammar/items/mod.rs
@@ -355,7 +355,12 @@ pub(super) fn token_tree(p: &mut Parser) {
     while !p.at(EOF) && !p.at(closing_paren_kind) {
         match p.current() {
             L_CURLY | L_PAREN | L_BRACK => token_tree(p),
-            R_CURLY | R_PAREN | R_BRACK => p.err_and_bump("unmatched brace"),
+            R_CURLY => {
+                p.error("unmatched `}`");
+                m.complete(p, TOKEN_TREE);
+                return;
+            }
+            R_PAREN | R_BRACK => p.err_and_bump("unmatched brace"),
             _ => p.bump()
         }
     };
diff --git a/crates/libsyntax2/tests/data/parser/err/0023_mismatched_paren.rs b/crates/libsyntax2/tests/data/parser/err/0023_mismatched_paren.rs
new file mode 100644
index 000000000..0206d563e
--- /dev/null
+++ b/crates/libsyntax2/tests/data/parser/err/0023_mismatched_paren.rs
@@ -0,0 +1,5 @@
+fn main() {
+    foo! (
+        bar, "baz", 1, 2.0
+    } //~ ERROR incorrect close delimiter
+}
diff --git a/crates/libsyntax2/tests/data/parser/err/0023_mismatched_paren.txt b/crates/libsyntax2/tests/data/parser/err/0023_mismatched_paren.txt
new file mode 100644
index 000000000..2df81b12b
--- /dev/null
+++ b/crates/libsyntax2/tests/data/parser/err/0023_mismatched_paren.txt
@@ -0,0 +1,43 @@
+ROOT@[0; 94)
+  FN_DEF@[0; 55)
+    FN_KW@[0; 2)
+    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; 55)
+      L_CURLY@[10; 11)
+      WHITESPACE@[11; 16)
+      MACRO_CALL@[16; 49)
+        PATH@[16; 19)
+          PATH_SEGMENT@[16; 19)
+            NAME_REF@[16; 19)
+              IDENT@[16; 19) "foo"
+        EXCL@[19; 20)
+        WHITESPACE@[20; 21)
+        TOKEN_TREE@[21; 49)
+          L_PAREN@[21; 22)
+          WHITESPACE@[22; 31)
+          IDENT@[31; 34) "bar"
+          COMMA@[34; 35)
+          WHITESPACE@[35; 36)
+          STRING@[36; 41)
+          COMMA@[41; 42)
+          WHITESPACE@[42; 43)
+          INT_NUMBER@[43; 44) "1"
+          COMMA@[44; 45)
+          WHITESPACE@[45; 46)
+          FLOAT_NUMBER@[46; 49) "2.0"
+          err: `unmatched `}``
+      WHITESPACE@[49; 54)
+      R_CURLY@[54; 55)
+  WHITESPACE@[55; 56)
+  COMMENT@[56; 91)
+  WHITESPACE@[91; 92)
+  err: `unmatched `}``
+  ERROR@[92; 93)
+    R_CURLY@[92; 93)
+  WHITESPACE@[93; 94)
-- 
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