From 21e8c6c4ca6e026e13e4c341b52b904358c2da5e Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Tue, 12 Jun 2018 23:57:08 -0400
Subject: [PATCH] add class declaration to the parser

---
 src/parser/parser.l  |  2 ++
 src/parser/parser.yc | 23 +++++++++++++++++++++++
 tests/t006.cxl       | 10 ++++++++++
 tests/t006.x         |  0
 4 files changed, 35 insertions(+)
 create mode 100644 tests/t006.cxl
 create mode 100644 tests/t006.x

diff --git a/src/parser/parser.l b/src/parser/parser.l
index 7060c96..faee203 100644
--- a/src/parser/parser.l
+++ b/src/parser/parser.l
@@ -131,6 +131,8 @@ asm                 return ASM;
 __asm__             return ASM;
 __extension__       return EXTENSION;
 
+class               return CLASS;
+
 L?'[^\\]'           return CHAR_CONST;
 L?'\\.'             return CHAR_CONST;
 L?'\\x[0-9A-Fa-f]{2}'   return CHAR_CONST;
diff --git a/src/parser/parser.yc b/src/parser/parser.yc
index 94c228b..85b5e6a 100644
--- a/src/parser/parser.yc
+++ b/src/parser/parser.yc
@@ -117,6 +117,8 @@ int yylex(YYSTYPE *, YYLTYPE *);
 %token ASM;
 %token EXTENSION;
 
+%token CLASS;
+
 %start translation_unit
 
 %%
@@ -591,6 +593,7 @@ type_specifier
     | UNSIGNED { $$ = $1; }
     | struct_or_union_specifier { $$ = $1; }
     | enum_specifier { $$ = $1; }
+    | class_specifier { $$ = $1; }
     | TYPE_NAME { $$ = $1; }
     ;
 
@@ -743,6 +746,26 @@ enumerator
     }
     ;
 
+class_specifier
+    : CLASS IDENTIFIER LCURLY RCURLY {
+        $$ = new Node(NODE_TYPE_LIST);
+    }
+    | CLASS IDENTIFIER LCURLY external_declaration_list RCURLY {
+        $$ = new Node(NODE_TYPE_LIST);
+    }
+    ;
+
+external_declaration_list
+    : external_declaration {
+        $$ = new Node(NODE_TYPE_LIST);
+        $$->list->push_back($1);
+    }
+    | external_declaration_list external_declaration {
+        $$ = $1;
+        $$->list->push_back($2);
+    }
+    ;
+
 type_qualifier
     : CONST { $$ = $1; }
     | VOLATILE { $$ = $1; }
diff --git a/tests/t006.cxl b/tests/t006.cxl
new file mode 100644
index 0000000..1057893
--- /dev/null
+++ b/tests/t006.cxl
@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+class Foo
+{
+};
+
+int main(int argc, char * argv[])
+{
+    return 0;
+}
diff --git a/tests/t006.x b/tests/t006.x
new file mode 100644
index 0000000..e69de29