Add concatenated strings

corpus/expressions.txt

@@ -49,6 +49,25 @@ int main() {
     (compound_statement
       (expression_statement (call_expression (identifier) (string_literal) (identifier))))))
 
+============================================
+String literals
+============================================
+
+int main() {
+  "a";
+  "b" "c" "d";
+}
+
+---
+
+(translation_unit
+  (function_definition
+    (identifier)
+    (function_declarator (identifier))
+    (compound_statement
+      (expression_statement (string_literal))
+      (expression_statement (concatenated_string (string_literal) (string_literal) (string_literal))))))
+
 ============================================
 Character literals
 ============================================

grammar.js

@@ -449,6 +449,7 @@ module.exports = grammar({
       $.identifier,
       $.number_literal,
       $.string_literal,
+      $.concatenated_string,
       $.char_literal,
       $.parenthesized_expression
     ),
@@ -609,6 +610,11 @@ module.exports = grammar({
       '\''
     )),
 
+    concatenated_string: $ => seq(
+      $.string_literal,
+      repeat1($.string_literal)
+    ),
+
     string_literal: $ => token(seq(
       '"',
       repeat(choice(/[^"]/, '\\"')),

src/grammar.json

@@ -1891,6 +1891,10 @@
           "type": "SYMBOL",
           "name": "string_literal"
         },
+        {
+          "type": "SYMBOL",
+          "name": "concatenated_string"
+        },
         {
           "type": "SYMBOL",
           "name": "char_literal"
@@ -3075,6 +3079,22 @@
         ]
       }
     },
+    "concatenated_string": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "string_literal"
+        },
+        {
+          "type": "REPEAT1",
+          "content": {
+            "type": "SYMBOL",
+            "name": "string_literal"
+          }
+        }
+      ]
+    },
     "string_literal": {
       "type": "TOKEN",
       "content": {