wrote dsl for ast boiler plate generation

runtime/interpreter.go

@@ -36,7 +36,7 @@ func (i *Interpreter) VisitBinaryExpr(b *ast.BinaryExpr) any {
 	areStrings := leftType == LoxTypeString &&
 		rightType == LoxTypeString
 
-	switch b.Operator.Type {
+	switch b.Op.Type {
 	case lexer.TokenTypeMinus:
 		if !areNumbers {
 			// todo: error here
@@ -119,7 +119,7 @@ func (i *Interpreter) VisitLiteralExpr(g *ast.LiteralExpr) any {
 func (i *Interpreter) VisitUnaryExpr(g *ast.UnaryExpr) any {
 	right := i.Evaluate(g.Right)
 
-	switch g.Operator.Type {
+	switch g.Op.Type {
 	case lexer.TokenTypeMinus:
 		if right.Type() != LoxTypeNumber {
 			// todo: error here

runtime/loxtype_string.go

@@ -0,0 +1,27 @@
+// Code generated by "stringer -type LoxType -trimprefix LoxType"; DO NOT EDIT.
+
+package runtime
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[LoxTypeString-0]
+	_ = x[LoxTypeNumber-1]
+	_ = x[LoxTypeBoolean-2]
+	_ = x[LoxTypeNil-3]
+	_ = x[LoxTypeUndefined-4]
+}
+
+const _LoxType_name = "StringNumberBooleanNilUndefined"
+
+var _LoxType_index = [...]uint8{0, 6, 12, 19, 22, 31}
+
+func (i LoxType) String() string {
+	if i < 0 || i >= LoxType(len(_LoxType_index)-1) {
+		return "LoxType(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _LoxType_name[_LoxType_index[i]:_LoxType_index[i+1]]
+}