adapted to the new GetFuncInfo() specification

operand-func.go

@@ -11,9 +11,7 @@ import (
 // -------- function call term
 func newFuncCallTerm(tk *Token, args []*term) *term {
 	return &term{
-		tk: *tk,
-		// class:    classVar,
-		// kind:     kindUnknown,
+		tk:       *tk,
 		parent:   nil,
 		children: args,
 		position: posLeaf,
@@ -44,7 +42,7 @@ func evalFuncCall(parentCtx ExprContext, self *term) (v any, err error) {
 			}
 			// Export functions
 			for _, refName := range ctx.EnumFuncs(func(name string) bool { return exportAll || name[0] == '@' }) {
-				if info := ctx.GetFuncInfo(refName); info != nil {
+				if info, _ := ctx.GetFuncInfo(refName); info != nil {
 					exportFunc(parentCtx, refName, info)
 				}
 			}

operand-var.go

@@ -25,8 +25,7 @@ func evalVar(ctx ExprContext, self *term) (v any, err error) {
 	var exists bool
 	name := self.source()
 	if v, exists = ctx.GetVar(name); !exists {
-		info := ctx.GetFuncInfo(name)
-		if info != nil {
+		if info, exists := ctx.GetFuncInfo(name); exists {
 			v = info.Functor()
 		} else {
 			err = fmt.Errorf("undefined variable or function %q", name)

simple-func-store.go

@@ -50,8 +50,8 @@ func (ctx *SimpleFuncStore) Clone() ExprContext {
 	}
 }
 
-func (ctx *SimpleFuncStore) GetFuncInfo(name string) (info ExprFunc) {
-	info, _ = ctx.funcStore[name]
+func (ctx *SimpleFuncStore) GetFuncInfo(name string) (info ExprFunc, exists bool) {
+	info, exists = ctx.funcStore[name]
 	return
 }
 

simple-var-store.go

@@ -54,7 +54,7 @@ func (ctx *SimpleVarStore) EnumVars(acceptor func(name string) (accept bool)) (v
 	return
 }
 
-func (ctx *SimpleVarStore) GetFuncInfo(name string) (f ExprFunc) {
+func (ctx *SimpleVarStore) GetFuncInfo(name string) (f ExprFunc, exists bool) {
 	return
 }