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node_modules/webpack/lib/javascript/JavascriptParserHelpers.js

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