ExprContext.SetVar() no longer requires the explicit specification of the type of number

operand-func.go

@@ -57,7 +57,7 @@ func exportVar(ctx ExprContext, name string, value any) {
 	if name[0] == '@' {
 		name = name[1:]
 	}
-	ctx.SetVar(name, value)
+	ctx.setVar(name, value)
 }
 
 func exportFunc(ctx ExprContext, name string, info ExprFunc) {
@@ -89,9 +89,9 @@ type funcDefFunctor struct {
 func (functor *funcDefFunctor) Invoke(ctx ExprContext, name string, args []any) (result any, err error) {
 	for i, p := range functor.params {
 		if i < len(args) {
-			ctx.SetVar(p, args[i])
+			ctx.setVar(p, args[i])
 		} else {
-			ctx.SetVar(p, nil)
+			ctx.setVar(p, nil)
 		}
 	}
 	result, err = functor.expr.eval(ctx, false)