setup parser structure

compiler.h

@@ -160,6 +160,66 @@ struct compile_process
     FILE *ofile;
 };
 
+enum
+{
+    NODE_TYPE_EXPRESSION,
+    NODE_TYPE_EXPRESSION_PARENTHESIS,
+    NODE_TYPE_NUMBER,
+    NODE_TYPE_IDENTIFIER,
+    NODE_TYPE_STRING,
+    NODE_TYPE_VARIABLE,
+    NODE_TYPE_VARIABLE_LIST,
+    NODE_TYPE_FUNCTION,
+    NODE_TYPE_BODY,
+    NODE_TYPE_STATEMENT_RETURN,
+    NODE_TYPE_STATEMENT_IF,
+    NODE_TYPE_STATEMENT_ELSE,
+    NODE_TYPE_STATEMENT_WHILE,
+    NODE_TYPE_STATEMENT_DO_WHILE,
+    NODE_TYPE_STATEMENT_FOR,
+    NODE_TYPE_STATEMENT_BREAK,
+    NODE_TYPE_STATEMENT_CONTINUE,
+    NODE_TYPE_STATEMENT_SWITCH,
+    NODE_TYPE_STATEMENT_CASE,
+    NODE_TYPE_STATEMENT_DEFAULT,
+    NODE_TYPE_STATEMENT_GOTO,
+
+    NODE_TYPE_UNARY,
+    NODE_TYPE_TENARY,
+    NODE_TYPE_LABEL,
+    NODE_TYPE_STRUCT,
+    NODE_TYPE_UNION,
+    NODE_TYPE_BRACKET,
+    NODE_TYPE_CAST,
+    NODE_TYPE_BLANK
+};
+
+struct node
+{
+    int type;
+    int flags;
+
+    struct pos;
+
+    struct node_binded
+    {
+        // Pointer to body node
+        struct node *owner;
+
+        // Pointer to function this node is in
+        struct node *function;
+    } binded;
+
+    union
+    {
+        char cval;
+        const char *sval;
+        unsigned int inum;
+        unsigned long lnum;
+        unsigned long long llnum;
+    };
+};
+
 int compile_file(const char *filename, const char *out_filename, int flags);
 struct compile_process *compile_process_create(const char *filename, const char *filename_out, int flags);