Protect against function-looking structs (Fixes #513)

lib/cmock_header_parser.rb

@@ -253,7 +253,7 @@ class CMockHeaderParser
     # enums, unions, structs, and typedefs can all contain things (e.g. function pointers) that parse like function prototypes, so yank them
     # forward declared structs are removed before struct definitions so they don't mess up real thing later. we leave structs keywords in function prototypes
     source.gsub!(/^[\w\s]*struct[^;{}()]+;/m, '') # remove forward declared structs
-    source.gsub!(/^[\w\s]*(enum|union|struct|typedef)[\w\s]*\{[^}]+\}[\w\s*,]*;/m, '') # remove struct, union, and enum definitions and typedefs with braces
+    source.gsub!(/^[\w\s]*(enum|union|struct|typedef)[\w\s()]*\{[^}]+\}[\w\s*,]*;/m, '') # remove struct, union, and enum definitions and typedefs with braces
     # remove problem keywords
     source.gsub!(/(\W)(?:register|auto|restrict)(\W)/, '\1\2')
     source.gsub!(/(\W)(?:static)(\W)/, '\1\2') unless cpp

test/system/test_compilation/parsing.h

@@ -111,3 +111,8 @@ inline int stuff(int num)
     }
     return reg;
 }
+
+/* it seems like CMock didn't love a func-looking struct before a func */
+#define FOO_TYPE(a) foo_##a
+struct FOO_TYPE(bar) { int baz; };
+char b(void);