@1771technologies/lytenyte-pro/dist/expressions/plugins/comparison.js

Blazingly fast headless React data grid with 100s of features.

import { current } from "../parser/parser-context.js";
const COMPARISON_PRECEDENCE = {
    "==": 30,
    "!=": 30,
    "<": 40,
    ">": 40,
    "<=": 40,
    ">=": 40,
};
export const comparisonPlugin = {
    name: "comparison",
    infixPrecedence: (ctx) => {
        const tok = current(ctx);
        if (tok.type === "Operator") {
            return COMPARISON_PRECEDENCE[tok.value];
        }
        return undefined;
    },
    optimize: (node, opt) => {
        if (node.type === "BinaryExpression" && node.operator in COMPARISON_PRECEDENCE) {
            const left = opt(node.left);
            const right = opt(node.right);
            return { ...node, left, right };
        }
        return null;
    },
    evaluate: (node, context, evalFn) => {
        if (node.type === "BinaryExpression") {
            const op = node.operator;
            if (op in COMPARISON_PRECEDENCE) {
                const left = evalFn(node.left, context);
                const right = evalFn(node.right, context);
                switch (op) {
                    case "==":
                        return { value: left === right };
                    case "!=":
                        return { value: left !== right };
                    case "<":
                        return { value: left < right };
                    case ">":
                        return { value: left > right };
                    case "<=":
                        return { value: left <= right };
                    case ">=":
                        return { value: left >= right };
                }
            }
        }
        return null;
    },
};