You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.9 KiB
65 lines
1.9 KiB
4 weeks ago
|
/*
|
||
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
||
|
|
Author Tobias Koppers @sokra
|
||
|
|
*/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
/** @typedef {import("estree").ArrowFunctionExpression} ArrowFunctionExpression */
|
||
|
|
/** @typedef {import("estree").Expression} Expression */
|
||
|
|
/** @typedef {import("estree").FunctionExpression} FunctionExpression */
|
||
|
|
/** @typedef {import("estree").SpreadElement} SpreadElement */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param {Expression | SpreadElement} expr expressions
|
||
|
|
* @returns {{fn: FunctionExpression | ArrowFunctionExpression, expressions: (Expression | SpreadElement)[], needThis: boolean | undefined } | undefined} function expression with additional information
|
||
|
|
*/
|
||
|
|
module.exports = 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]],
|
||
|
|
needThis: undefined
|
||
|
|
};
|
||
|
|
}
|
||
|
|
// (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
|
||
|
|
};
|
||
|
|
}
|
||
|
|
};
|