class and kind types removed

term.go

@@ -8,27 +8,6 @@ import (
 	"strings"
 )
 
-type termKind uint16
-
-const (
-	kindUnknown termKind = iota
-	kindBool
-	kindInteger
-	kindFloat
-	kindString
-	kindIdentifier
-)
-
-type termClass uint16
-
-const (
-	classNull termClass = iota
-	classConst
-	classVar
-	classFunc
-	classOperator
-)
-
 type termPriority uint32
 
 const (
@@ -60,23 +39,11 @@ const (
 
 type evalFuncType func(ctx ExprContext, self *term) (v any, err error)
 
-// type iterm interface {
-// 	getClass() termClass
-// 	getKind() termKind
-// 	compute(ctx exprContext) (v any, err error)
-// 	// isOperator() bool
-// 	// isOperand() bool
-// 	source() string
-// 	setParent(parentNode term)
-// }
-
 type term struct {
 	tk       Token
-	class    termClass
-	kind     termKind
 	parent   *term
 	children []*term
-	position termPosition // operator position: infix, prefix, suffix
+	position termPosition // operator position: leaf, infix, prefix, postfix, multifix
 	priority termPriority // operator priority: higher value means higher priority
 	evalFunc evalFuncType
 }
@@ -169,7 +136,7 @@ func (self *term) value() any {
 
 func (self *term) compute(ctx ExprContext) (v any, err error) {
 	if self.evalFunc == nil {
-		err = self.tk.Errorf("undefined eval-func for %v term type", self.kind)
+		err = self.tk.Errorf("undefined eval-func for %q term", self.source())
 	} else {
 		v, err = self.evalFunc(ctx, self)
 	}