estree-toolkit/dist/is.js

Traverser, scope tracker, and more tools for working with ESTree AST

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.is = void 0;
const definitions_1 = require("./definitions");
const aliases_1 = require("./aliases");
const helpers_1 = require("./helpers");
const matches = (object, toMatch) => {
    for (const key in toMatch) {
        const value = toMatch[key];
        if (typeof value == 'function') {
            if (!value(object[key], object))
                return false;
        }
        else if (value !== object[key]) {
            return false;
        }
    }
    return true;
};
exports.is = {};
for (const nodeType in definitions_1.definitions) {
    exports.is[(0, helpers_1.toCamelCase)(nodeType)] = (nodeOrNodePath, toMatch) => {
        if (nodeOrNodePath == null)
            return false;
        // We shouldn't believe in micro-benchmarks but it seems that
        // checking for a property is faster than `instanceof` calls
        // for `NodePath`
        const node = nodeOrNodePath.ctx != null
            ? nodeOrNodePath.node
            : nodeOrNodePath;
        return (node != null && node.type === nodeType &&
            (toMatch != null ? matches(node, toMatch) : true));
    };
}
for (const aliasName in aliases_1.aliases) {
    exports.is[(0, helpers_1.toCamelCase)(aliasName)] = (nodeOrNodePath, toMatch) => {
        if (nodeOrNodePath == null)
            return false;
        const node = nodeOrNodePath.ctx != null
            ? nodeOrNodePath.node
            : nodeOrNodePath;
        return (node != null && (node.type in aliases_1.aliases[aliasName]) &&
            (toMatch != null ? matches(node, toMatch) : true));
    };
}