2a09d1a4
 liuqimichale
添加宜春 天水 宣化
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
module.exports = function(expr) {
// <FunctionExpression>
if(expr.type === "FunctionExpression" || expr.type === "ArrowFunctionExpression") {
return {
fn: expr,
expressions: [],
needThis: false
};
}
// <FunctionExpression>.bind(<Expression>)
if(expr.type === "CallExpression" &&
expr.callee.type === "MemberExpression" &&
expr.callee.object.type === "FunctionExpression" &&
expr.callee.property.type === "Identifier" &&
expr.callee.property.name === "bind" &&
expr.arguments.length === 1) {
return {
fn: expr.callee.object,
expressions: [expr.arguments[0]]
};
}
// (function(_this) {return <FunctionExpression>})(this) (Coffeescript)
if(expr.type === "CallExpression" &&
expr.callee.type === "FunctionExpression" &&
expr.callee.body.type === "BlockStatement" &&
expr.arguments.length === 1 &&
expr.arguments[0].type === "ThisExpression" &&
expr.callee.body.body &&
expr.callee.body.body.length === 1 &&
expr.callee.body.body[0].type === "ReturnStatement" &&
expr.callee.body.body[0].argument &&
expr.callee.body.body[0].argument.type === "FunctionExpression") {
return {
fn: expr.callee.body.body[0].argument,
expressions: [],
needThis: true
};
}
};
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