cerxes/babel
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This commit is contained in:
Brian Ng
2017-06-27 12:15:00 -05:00
parent 93cc22dae1
commit e4b35f680d
307 changed files with 6742 additions and 4080 deletions
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35
packages/babel-plugin-transform-optional-chaining/src/index.js
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@@ -1,13 +1,17 @@
import syntaxOptionalChaining from "babel-plugin-syntax-optional-chaining";
export default function ({ types: t }) {
export default function({ types: t }) {
function optional(path, replacementPath, loose = false) {
const { scope } = path;
const optionals = [];
const nil = scope.buildUndefinedNode();
let objectPath = path;
while (objectPath.isMemberExpression() || objectPath.isCallExpression() || objectPath.isNewExpression()) {
while (
objectPath.isMemberExpression() ||
objectPath.isCallExpression() ||
objectPath.isNewExpression()
) {
const { node } = objectPath;
if (node.optional) {
optionals.push(node);
@@ -25,7 +29,8 @@ export default function ({ types: t }) {
node.optional = false;
const isCall = t.isCallExpression(node);
const replaceKey = isCall || t.isNewExpression(node) ? "callee" : "object";
const replaceKey =
isCall || t.isNewExpression(node) ? "callee" : "object";
const chain = node[replaceKey];
let ref;
@@ -67,18 +72,20 @@ export default function ({ types: t }) {
}
}
replacementPath.replaceWith(t.conditionalExpression(
t.binaryExpression("==", check, t.nullLiteral()),
nil,
replacementPath.node
));
replacementPath.replaceWith(
t.conditionalExpression(
t.binaryExpression("==", check, t.nullLiteral()),
nil,
replacementPath.node,
),
);
replacementPath = replacementPath.get("alternate");
}
}
function findReplacementPath(path) {
return path.find((path) => {
return path.find(path => {
const { parentPath } = path;
if (path.key == "left" && parentPath.isAssignmentExpression()) {
@@ -87,13 +94,19 @@ export default function ({ types: t }) {
if (path.key == "object" && parentPath.isMemberExpression()) {
return false;
}
if (path.key == "callee" && (parentPath.isCallExpression() || parentPath.isNewExpression())) {
if (
path.key == "callee" &&
(parentPath.isCallExpression() || parentPath.isNewExpression())
) {
return false;
}
if (path.key == "argument" && parentPath.isUpdateExpression()) {
return false;
}
if (path.key == "argument" && parentPath.isUnaryExpression({ operator: "delete" })) {
if (
path.key == "argument" &&
parentPath.isUnaryExpression({ operator: "delete" })
) {
return false;
}