Variable reference

operand-func.go

@@ -36,10 +36,17 @@ func evalFuncCall(parentCtx exprContext, self *term) (v any, err error) {
 	}
 	if err == nil {
 		if v, err = ctx.Call(name, params); err == nil {
+			// Export variables
 			for _, refName := range ctx.EnumVars(func(name string) bool { return name[0] == '@' }) {
 				refValue, _ := ctx.GetVar(refName)
 				parentCtx.SetVar(refName[1:], refValue)
 			}
+			// Export functions
+			for _, refName := range ctx.EnumFuncs(func(name string) bool { return name[0] == '@' }) {
+				if info := ctx.GetFuncInfo(refName); info != nil {
+					parentCtx.RegisterFunc(refName[1:], info.Functor(), info.MinArgs(), info.MaxArgs())
+				}
+			}
 		}
 	}
 	return