Added mixins for classes.

src/scripting/zscript/zcc_parser.h

@@ -135,6 +135,8 @@ enum EZCCTreeNodeType
 	AST_StaticArrayStatement,
 	AST_Property,
 	AST_FlagDef,
+	AST_MixinDef,
+	AST_MixinStmt,
 
 	NUM_AST_NODE_TYPES
 };
@@ -168,6 +170,13 @@ enum EZCCBuiltinType
 	ZCC_NUM_BUILT_IN_TYPES
 };
 
+enum EZCCMixinType
+{
+	ZCC_Mixin_Class,
+
+	ZCC_NUM_MIXIN_TYPES
+};
+
 enum EZCCExprType
 {
 #define xx(a,z)	PEX_##a,
@@ -241,6 +250,13 @@ struct ZCC_Class : ZCC_Struct
 	PClass *CType() { return static_cast<PClassType *>(Type)->Descriptor; }
 };
 
+struct ZCC_MixinDef : ZCC_NamedNode
+{
+	ZCC_TreeNode *Body;
+
+	EZCCMixinType MixinType;
+};
+
 struct ZCC_Enum : ZCC_NamedNode
 {
 	EZCCBuiltinType EnumType;
@@ -568,6 +584,11 @@ struct ZCC_FlagStmt : ZCC_Statement
 	bool set;
 };
 
+struct ZCC_MixinStmt : ZCC_Statement
+{
+	ENamedName MixinName;
+};
+
 FString ZCC_PrintAST(ZCC_TreeNode *root);