*** empty log message ***

ase/awk/tree.h

@@ -0,0 +1,32 @@
+
+enum TokenType
+{
+	IF, END, ID, NUM, READ, WrITE, UNTIL, ....
+}
+
+
+enum NodeKind { statement, expression };
+enum StatKind { if, repeat, assign, read, write };
+enum ExpKind  { op, const, id };
+enum ExpType  {  void, integer, boolean };
+
+struct treenode
+{
+	treenode* child[3]; // 
+	treenode* sibling; // <---- next statement...
+
+	int lineno;
+	NodeKind node_kind;	
+	union {
+		statkind s;
+		expkind e;
+	} kind;
+	union {
+		TokenType Op;
+		int val;
+		char* name;
+	} attr;
+
+
+	exptype type; <- for type checking...
+};