1 files changed, 29 insertions, 15 deletions

diff --git a/dat.h b/dat.h
index 052270f..7937e86 100644
--- a/dat.h
+++ b/dat.h
@@ -7,10 +7,29 @@ enum
 	TQUAT,
 };
 
-typedef struct Var Var;
-typedef struct Symbol Symbol;
+enum
+{
+	NODENUM,
+	NODESYM,
+};
+
 typedef struct Const Const;
 typedef struct Builtin Builtin;
+typedef struct Var Var;
+typedef struct Symbol Symbol;
+typedef struct Node Node;
+
+struct Const
+{
+	char *name;
+	double val;
+};
+
+struct Builtin
+{
+	char *name;
+	double (*fn)();
+};
 
 struct Var
 {
@@ -27,21 +46,16 @@ struct Symbol
 	char *name;
 	int type;
 	union {
-		Var var;
-		double val;		/* constant value */
-		double (*fn)(double);
-	} u;
+		Var var;		/* ID */
+		double dconst;		/* CONST */
+		double (*fn)(double);	/* BLTIN */
+	};
 	Symbol *next;
 };
 
-struct Const
+struct Node
 {
-	char *name;
-	double val;
-};
-
-struct Builtin
-{
-	char *name;
-	double (*fn)();
+	int type;
+	double num;	/* NODENUM */
+	Symbol *sym;	/* NODESYM */
 };