mirror of https://github.com/webpack/webpack.git
86 lines
2.4 KiB
JavaScript
86 lines
2.4 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 path = require("path");
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const BasicEvaluatedExpression = require("./BasicEvaluatedExpression");
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const ConstDependency = require("./dependencies/ConstDependency");
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const UnsupportedFeatureWarning = require("./UnsupportedFeatureWarning");
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const ParserHelpers = exports;
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ParserHelpers.addParsedVariableToModule = (parser, name, expression) => {
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if(!parser.state.current.addVariable) return false;
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var deps = [];
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parser.parse(expression, {
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current: {
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addDependency: dep => {
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dep.userRequest = name;
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deps.push(dep);
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}
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},
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module: parser.state.module
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});
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parser.state.current.addVariable(name, expression, deps);
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return true;
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};
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ParserHelpers.requireFileAsExpression = (context, pathToModule) => {
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var moduleJsPath = path.relative(context, pathToModule);
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if(!/^[A-Z]:/i.test(moduleJsPath)) {
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moduleJsPath = "./" + moduleJsPath.replace(/\\/g, "/");
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}
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return "require(" + JSON.stringify(moduleJsPath) + ")";
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};
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ParserHelpers.toConstantDependency = value => {
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return function constDependency(expr) {
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var dep = new ConstDependency(value, expr.range);
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dep.loc = expr.loc;
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this.state.current.addDependency(dep);
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return true;
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};
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};
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ParserHelpers.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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ParserHelpers.evaluateToBoolean = value => {
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return function booleanExpression(expr) {
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return new BasicEvaluatedExpression().setBoolean(value).setRange(expr.range);
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};
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};
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ParserHelpers.evaluateToIdentifier = (identifier, truthy) => {
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return function identifierExpression(expr) {
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let evex = new BasicEvaluatedExpression().setIdentifier(identifier).setRange(expr.range);
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if(truthy === true) evex = evex.setTruthy();
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else if(truthy === false) evex = evex.setFalsy();
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return evex;
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};
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};
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ParserHelpers.expressionIsUnsupported = (message) => {
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return function unsupportedExpression(expr) {
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var dep = new ConstDependency("(void 0)", expr.range);
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dep.loc = expr.loc;
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this.state.current.addDependency(dep);
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if(!this.state.module) return;
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this.state.module.warnings.push(new UnsupportedFeatureWarning(this.state.module, message));
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return true;
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};
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};
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ParserHelpers.skipTraversal = function skipTraversal() {
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return true;
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};
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ParserHelpers.approve = function approve() {
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return true;
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};
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