mirror of https://github.com/webpack/webpack.git
109 lines
3.2 KiB
JavaScript
109 lines
3.2 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const UnsupportedFeatureWarning = require("../UnsupportedFeatureWarning");
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const ConstDependency = require("../dependencies/ConstDependency");
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const BasicEvaluatedExpression = require("./BasicEvaluatedExpression");
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/** @typedef {import("estree").Expression} ExpressionNode */
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/** @typedef {import("./JavascriptParser")} JavascriptParser */
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/**
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* @param {JavascriptParser} parser the parser
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* @param {string} value the const value
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* @param {string[]=} runtimeRequirements runtime requirements
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* @returns {function(ExpressionNode): true} plugin function
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*/
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exports.toConstantDependency = (parser, value, runtimeRequirements) => {
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return function constDependency(expr) {
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const dep = new ConstDependency(value, expr.range, runtimeRequirements);
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dep.loc = expr.loc;
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parser.state.module.addPresentationalDependency(dep);
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return true;
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};
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};
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/**
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* @param {string} value the string value
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* @returns {function(ExpressionNode): BasicEvaluatedExpression} plugin function
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*/
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exports.evaluateToString = value => {
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return function stringExpression(expr) {
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return new BasicEvaluatedExpression().setString(value).setRange(expr.range);
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};
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};
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/**
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* @param {number} value the number value
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* @returns {function(ExpressionNode): BasicEvaluatedExpression} plugin function
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*/
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exports.evaluateToNumber = value => {
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return function stringExpression(expr) {
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return new BasicEvaluatedExpression().setNumber(value).setRange(expr.range);
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};
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};
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/**
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* @param {boolean} value the boolean value
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* @returns {function(ExpressionNode): BasicEvaluatedExpression} plugin function
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*/
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exports.evaluateToBoolean = value => {
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return function booleanExpression(expr) {
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return new BasicEvaluatedExpression()
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.setBoolean(value)
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.setRange(expr.range);
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};
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};
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/**
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* @param {string} identifier identifier
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* @param {string} rootInfo rootInfo
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* @param {function(): string[]} getMembers getMembers
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* @param {boolean|null=} truthy is truthy, null if nullish
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* @returns {function(ExpressionNode): BasicEvaluatedExpression} callback
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*/
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exports.evaluateToIdentifier = (identifier, rootInfo, getMembers, truthy) => {
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return function identifierExpression(expr) {
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let evaluatedExpression = new BasicEvaluatedExpression()
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.setIdentifier(identifier, rootInfo, getMembers)
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.setSideEffects(false)
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.setRange(expr.range);
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switch (truthy) {
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case true:
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evaluatedExpression.setTruthy();
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evaluatedExpression.setNullish(false);
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break;
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case null:
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evaluatedExpression.setFalsy();
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evaluatedExpression.setNullish(true);
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break;
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case false:
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evaluatedExpression.setFalsy();
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break;
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}
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return evaluatedExpression;
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};
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};
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exports.expressionIsUnsupported = (parser, message) => {
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return function unsupportedExpression(expr) {
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const dep = new ConstDependency("(void 0)", expr.range, null);
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dep.loc = expr.loc;
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parser.state.module.addPresentationalDependency(dep);
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if (!parser.state.module) return;
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parser.state.module.addWarning(
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new UnsupportedFeatureWarning(message, expr.loc)
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);
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return true;
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};
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};
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exports.skipTraversal = () => true;
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exports.approve = () => true;
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