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index.js
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Wed, Sep 11, 14:54
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index.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = wrapFunction;
var _helperFunctionName = _interopRequireDefault(require("@babel/helper-function-name"));
var _template = _interopRequireDefault(require("@babel/template"));
var t = _interopRequireWildcard(require("@babel/types"));
function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const buildAnonymousExpressionWrapper = _template.default.expression(`
(function () {
var REF = FUNCTION;
return function NAME(PARAMS) {
return REF.apply(this, arguments);
};
})()
`);
const buildNamedExpressionWrapper = _template.default.expression(`
(function () {
var REF = FUNCTION;
function NAME(PARAMS) {
return REF.apply(this, arguments);
}
return NAME;
})()
`);
const buildDeclarationWrapper = (0, _template.default)(`
function NAME(PARAMS) { return REF.apply(this, arguments); }
function REF() {
REF = FUNCTION;
return REF.apply(this, arguments);
}
`);
function classOrObjectMethod(path, callId) {
const node = path.node;
const body = node.body;
const container = t.functionExpression(null, [], t.blockStatement(body.body), true);
body.body = [t.returnStatement(t.callExpression(t.callExpression(callId, [container]), []))];
node.async = false;
node.generator = false;
path.get("body.body.0.argument.callee.arguments.0").unwrapFunctionEnvironment();
}
function plainFunction(path, callId) {
const node = path.node;
const isDeclaration = path.isFunctionDeclaration();
const functionId = node.id;
const wrapper = isDeclaration ? buildDeclarationWrapper : functionId ? buildNamedExpressionWrapper : buildAnonymousExpressionWrapper;
if (path.isArrowFunctionExpression()) {
path.arrowFunctionToExpression();
}
node.id = null;
if (isDeclaration) {
node.type = "FunctionExpression";
}
const built = t.callExpression(callId, [node]);
const container = wrapper({
NAME: functionId || null,
REF: path.scope.generateUidIdentifier(functionId ? functionId.name : "ref"),
FUNCTION: built,
PARAMS: node.params.reduce((acc, param) => {
acc.done = acc.done || t.isAssignmentPattern(param) || t.isRestElement(param);
if (!acc.done) {
acc.params.push(path.scope.generateUidIdentifier("x"));
}
return acc;
}, {
params: [],
done: false
}).params
});
if (isDeclaration) {
path.replaceWith(container[0]);
path.insertAfter(container[1]);
} else {
const retFunction = container.callee.body.body[1].argument;
if (!functionId) {
(0, _helperFunctionName.default)({
node: retFunction,
parent: path.parent,
scope: path.scope
});
}
if (!retFunction || retFunction.id || node.params.length) {
path.replaceWith(container);
} else {
path.replaceWith(built);
}
}
}
function wrapFunction(path, callId) {
if (path.isMethod()) {
classOrObjectMethod(path, callId);
} else {
plainFunction(path, callId);
}
}
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