package cn.iocoder.yudao.module.qcreport.engine.rule;
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import java.util.List;
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/**
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* 规则语法树节点。
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* <p>
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* 与前端 {@code engine/rule-engine.ts} 的 RuleNode 联合类型一一对应：
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* 递归下降解析成这棵树后自己求值，全程不碰 eval / 脚本引擎——
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* 规则文本来自用户，一旦能被当作代码执行就是注入口子。
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*/
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public sealed interface RuleNode {
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/** 字面量：数字（Double）/ 字符串 / 布尔 / null */
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record Literal(Object value) implements RuleNode {
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}
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/** 上下文路径取值，如 item.actualValue */
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record Path(String path) implements RuleNode {
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}
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/** 白名单函数调用 */
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record Call(String name, List<RuleNode> args) implements RuleNode {
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}
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/** 一元运算：- 或 ! */
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record Unary(String operator, RuleNode operand) implements RuleNode {
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}
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/** 二元运算：AND / OR / = / != / > / >= / < / <= / + / - / * / / */
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record Binary(String operator, RuleNode left, RuleNode right) implements RuleNode {
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}
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/** value BETWEEN lower AND upper */
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record Between(RuleNode value, RuleNode lower, RuleNode upper, boolean negated) implements RuleNode {
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}
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/** value IN (items) / value NOT IN (items) */
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record In(RuleNode value, List<RuleNode> items, boolean negated) implements RuleNode {
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}
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}
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