aaac7fed
 liuqimichale
add
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/*
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;
};
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