chushihua

node_modules/webpack/lib/ParserHelpers.js

@@ -0,0 +1,85 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+const path = require("path");
+
+const BasicEvaluatedExpression = require("./BasicEvaluatedExpression");
+const ConstDependency = require("./dependencies/ConstDependency");
+const UnsupportedFeatureWarning = require("./UnsupportedFeatureWarning");
+
+const ParserHelpers = exports;
+
+ParserHelpers.addParsedVariableToModule = function(parser, name, expression) {
+	if(!parser.state.current.addVariable) return false;
+	var deps = [];
+	parser.parse(expression, {
+		current: {
+			addDependency: function(dep) {
+				dep.userRequest = name;
+				deps.push(dep);
+			}
+		},
+		module: parser.state.module
+	});
+	parser.state.current.addVariable(name, expression, deps);
+	return true;
+};
+
+ParserHelpers.requireFileAsExpression = function(context, pathToModule) {
+	var moduleJsPath = path.relative(context, pathToModule);
+	if(!/^[A-Z]:/i.test(moduleJsPath)) {
+		moduleJsPath = "./" + moduleJsPath.replace(/\\/g, "/");
+	}
+	return "require(" + JSON.stringify(moduleJsPath) + ")";
+};
+
+ParserHelpers.toConstantDependency = function(value) {
+	return function constDependency(expr) {
+		var dep = new ConstDependency(value, expr.range);
+		dep.loc = expr.loc;
+		this.state.current.addDependency(dep);
+		return true;
+	};
+};
+
+ParserHelpers.evaluateToString = function(value) {
+	return function stringExpression(expr) {
+		return new BasicEvaluatedExpression().setString(value).setRange(expr.range);
+	};
+};
+
+ParserHelpers.evaluateToBoolean = function(value) {
+	return function booleanExpression(expr) {
+		return new BasicEvaluatedExpression().setBoolean(value).setRange(expr.range);
+	};
+};
+
+ParserHelpers.evaluateToIdentifier = function(identifier, truthy) {
+	return function identifierExpression(expr) {
+		let evex = new BasicEvaluatedExpression().setIdentifier(identifier).setRange(expr.range);
+		if(truthy === true) evex = evex.setTruthy();
+		else if(truthy === false) evex = evex.setFalsy();
+		return evex;
+	};
+};
+
+ParserHelpers.expressionIsUnsupported = function(message) {
+	return function unsupportedExpression(expr) {
+		var dep = new ConstDependency("(void 0)", expr.range);
+		dep.loc = expr.loc;
+		this.state.current.addDependency(dep);
+		if(!this.state.module) return;
+		this.state.module.warnings.push(new UnsupportedFeatureWarning(this.state.module, message));
+		return true;
+	};
+};
+
+ParserHelpers.skipTraversal = function skipTraversal() {
+	return true;
+};
+
+ParserHelpers.approve = function approve() {
+	return true;
+};