expr/operand-list.go

// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
// All rights reserved.

// operand-list.go
package expr

// -------- list term
func newListTermA(args ...*term) *term {
	return newListTerm(args)
}

func newListTerm(args []*term) *term {
	return &term{
		tk:       *NewValueToken(0, 0, SymList, "[]", args),
		parent:   nil,
		children: nil,
		position: posLeaf,
		priority: priValue,
		evalFunc: evalList,
	}
}

// -------- list func
func evalList(ctx ExprContext, self *term) (v any, err error) {
	list, _ := self.value().([]*term)
	items := make([]any, len(list))
	for i, tree := range list {
		var param any
		if param, err = tree.compute(ctx); err != nil {
			break
		}
		items[i] = param
	}
	if err == nil {
		v = items
	}
	return
}

// // -------- list term
// func newListTerm(args []*term) *term {
// 	return &term{
// 		tk:       *NewToken(0, 0, SymList, "[]"),
// 		parent:   nil,
// 		children: args,
// 		position: posLeaf,
// 		priority: priValue,
// 		evalFunc: evalList,
// 	}
// }

// // -------- list func
// func evalList(ctx ExprContext, self *term) (v any, err error) {
// 	items := make([]any, len(self.children))
// 	for i, tree := range self.children {
// 		var param any
// 		if param, err = tree.compute(ctx); err != nil {
// 			break
// 		}
// 		items[i] = param
// 	}
// 	if err == nil {
// 		v = items
// 	}
// 	return
// }