initial commit taken from gitlab.lrz.de

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privatereese
2018-08-24 18:09:42 +02:00
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commit fc05486403
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# @babel/helper-member-expression-to-functions
> Helper function to replace certain member expressions with function calls
See our website [@babel/helper-member-expression-to-functions](https://babeljs.io/docs/en/next/babel-helper-member-expression-to-functions.html) for more information.
## Install
Using npm:
```sh
npm install --save-dev @babel/helper-member-expression-to-functions
```
or using yarn:
```sh
yarn add @babel/helper-member-expression-to-functions --dev
```

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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = memberExpressionToFunctions;
function t() {
const data = _interopRequireWildcard(require("@babel/types"));
t = function () {
return data;
};
return data;
}
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
class AssignmentMemoiser {
constructor() {
this._map = new WeakMap();
}
has(key) {
return this._map.has(key);
}
get(key) {
if (!this.has(key)) return;
const record = this._map.get(key);
const {
value
} = record;
record.count--;
if (record.count === 0) {
return t().assignmentExpression("=", value, key);
}
return value;
}
set(key, value, count) {
return this._map.set(key, {
count,
value
});
}
}
const handle = {
memoise() {},
handle(member) {
const {
node,
parent,
parentPath
} = member;
if (parentPath.isUpdateExpression({
argument: node
})) {
const {
operator,
prefix
} = parent;
this.memoise(member, 2);
const value = t().binaryExpression(operator[0], t().unaryExpression("+", this.get(member)), t().numericLiteral(1));
if (prefix) {
parentPath.replaceWith(this.set(member, value));
} else {
const {
scope
} = member;
const ref = scope.generateUidIdentifierBasedOnNode(node);
scope.push({
id: ref
});
value.left = t().assignmentExpression("=", t().cloneNode(ref), value.left);
parentPath.replaceWith(t().sequenceExpression([this.set(member, value), t().cloneNode(ref)]));
}
return;
}
if (parentPath.isAssignmentExpression({
left: node
})) {
const {
operator,
right
} = parent;
let value = right;
if (operator !== "=") {
this.memoise(member, 2);
value = t().binaryExpression(operator.slice(0, -1), this.get(member), value);
}
parentPath.replaceWith(this.set(member, value));
return;
}
if (parentPath.isCallExpression({
callee: node
})) {
const {
arguments: args
} = parent;
parentPath.replaceWith(this.call(member, args));
return;
}
member.replaceWith(this.get(member));
}
};
function memberExpressionToFunctions(path, visitor, state) {
path.traverse(visitor, Object.assign({}, handle, state, {
memoiser: new AssignmentMemoiser()
}));
}

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"author": {
"email": "justin@ridgewell.name",
"name": "Justin Ridgewell"
},
"dependencies": {
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},
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"directories": {},
"dist": {
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"unpackedSize": 3888
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"license": "MIT",
"main": "lib/index.js",
"maintainers": [
{
"name": "danez",
"email": "daniel@tschinder.de"
},
{
"name": "existentialism",
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},
{
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{
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"name": "@babel/helper-member-expression-to-functions",
"optionalDependencies": {},
"readme": "ERROR: No README data found!",
"repository": {
"type": "git",
"url": "https://github.com/babel/babel/tree/master/packages/babel-helper-member-expression-to-functions"
},
"version": "7.0.0-beta.54"
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