hexo/node_modules/@babel/plugin-proposal-object-rest.../lib/index.js

465 lines
19 KiB
JavaScript

'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
var helperPluginUtils = require('@babel/helper-plugin-utils');
var syntaxObjectRestSpread = require('@babel/plugin-syntax-object-rest-spread');
var core = require('@babel/core');
var pluginTransformParameters = require('@babel/plugin-transform-parameters');
var helperCompilationTargets = require('@babel/helper-compilation-targets');
var compatData = require('@babel/compat-data/corejs2-built-ins');
function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
var compatData__default = /*#__PURE__*/_interopDefaultLegacy(compatData);
const {
isObjectProperty: isObjectProperty$1,
isArrayPattern,
isObjectPattern,
isAssignmentPattern: isAssignmentPattern$1,
isRestElement,
isIdentifier
} = core.types;
function shouldStoreRHSInTemporaryVariable(node) {
if (isArrayPattern(node)) {
const nonNullElements = node.elements.filter(element => element !== null);
if (nonNullElements.length > 1) return true;else return shouldStoreRHSInTemporaryVariable(nonNullElements[0]);
} else if (isObjectPattern(node)) {
const {
properties
} = node;
if (properties.length > 1) return true;else if (properties.length === 0) return false;else {
const firstProperty = properties[0];
if (isObjectProperty$1(firstProperty)) {
return shouldStoreRHSInTemporaryVariable(firstProperty.value);
} else {
return shouldStoreRHSInTemporaryVariable(firstProperty);
}
}
} else if (isAssignmentPattern$1(node)) {
return shouldStoreRHSInTemporaryVariable(node.left);
} else if (isRestElement(node)) {
if (isIdentifier(node.argument)) return true;
return shouldStoreRHSInTemporaryVariable(node.argument);
} else {
return false;
}
}
const {
isAssignmentPattern,
isObjectProperty
} = core.types;
{
const node = core.types.identifier("a");
const property = core.types.objectProperty(core.types.identifier("key"), node);
const pattern = core.types.objectPattern([property]);
var ZERO_REFS = core.types.isReferenced(node, property, pattern) ? 1 : 0;
}
var index = helperPluginUtils.declare((api, opts) => {
var _api$assumption, _api$assumption2, _api$assumption3, _api$assumption4;
api.assertVersion(7);
const targets = api.targets();
const supportsObjectAssign = !helperCompilationTargets.isRequired("es6.object.assign", targets, {
compatData: compatData__default["default"]
});
const {
useBuiltIns = supportsObjectAssign,
loose = false
} = opts;
if (typeof loose !== "boolean") {
throw new Error(".loose must be a boolean, or undefined");
}
const ignoreFunctionLength = (_api$assumption = api.assumption("ignoreFunctionLength")) != null ? _api$assumption : loose;
const objectRestNoSymbols = (_api$assumption2 = api.assumption("objectRestNoSymbols")) != null ? _api$assumption2 : loose;
const pureGetters = (_api$assumption3 = api.assumption("pureGetters")) != null ? _api$assumption3 : loose;
const setSpreadProperties = (_api$assumption4 = api.assumption("setSpreadProperties")) != null ? _api$assumption4 : loose;
function getExtendsHelper(file) {
return useBuiltIns ? core.types.memberExpression(core.types.identifier("Object"), core.types.identifier("assign")) : file.addHelper("extends");
}
function hasRestElement(path) {
let foundRestElement = false;
visitRestElements(path, restElement => {
foundRestElement = true;
restElement.stop();
});
return foundRestElement;
}
function hasObjectPatternRestElement(path) {
let foundRestElement = false;
visitRestElements(path, restElement => {
if (restElement.parentPath.isObjectPattern()) {
foundRestElement = true;
restElement.stop();
}
});
return foundRestElement;
}
function visitRestElements(path, visitor) {
path.traverse({
Expression(path) {
const {
parent,
key
} = path;
if (isAssignmentPattern(parent) && key === "right" || isObjectProperty(parent) && parent.computed && key === "key") {
path.skip();
}
},
RestElement: visitor
});
}
function hasSpread(node) {
for (const prop of node.properties) {
if (core.types.isSpreadElement(prop)) {
return true;
}
}
return false;
}
function extractNormalizedKeys(node) {
const props = node.properties;
const keys = [];
let allLiteral = true;
let hasTemplateLiteral = false;
for (const prop of props) {
if (core.types.isIdentifier(prop.key) && !prop.computed) {
keys.push(core.types.stringLiteral(prop.key.name));
} else if (core.types.isTemplateLiteral(prop.key)) {
keys.push(core.types.cloneNode(prop.key));
hasTemplateLiteral = true;
} else if (core.types.isLiteral(prop.key)) {
keys.push(core.types.stringLiteral(String(
prop.key.value)));
} else {
keys.push(core.types.cloneNode(prop.key));
allLiteral = false;
}
}
return {
keys,
allLiteral,
hasTemplateLiteral
};
}
function replaceImpureComputedKeys(properties, scope) {
const impureComputedPropertyDeclarators = [];
for (const propPath of properties) {
const key = propPath.get("key");
if (propPath.node.computed && !key.isPure()) {
const name = scope.generateUidBasedOnNode(key.node);
const declarator = core.types.variableDeclarator(core.types.identifier(name), key.node);
impureComputedPropertyDeclarators.push(declarator);
key.replaceWith(core.types.identifier(name));
}
}
return impureComputedPropertyDeclarators;
}
function removeUnusedExcludedKeys(path) {
const bindings = path.getOuterBindingIdentifierPaths();
Object.keys(bindings).forEach(bindingName => {
const bindingParentPath = bindings[bindingName].parentPath;
if (path.scope.getBinding(bindingName).references > ZERO_REFS || !bindingParentPath.isObjectProperty()) {
return;
}
bindingParentPath.remove();
});
}
function createObjectRest(path, file, objRef) {
const props = path.get("properties");
const last = props[props.length - 1];
core.types.assertRestElement(last.node);
const restElement = core.types.cloneNode(last.node);
last.remove();
const impureComputedPropertyDeclarators = replaceImpureComputedKeys(path.get("properties"), path.scope);
const {
keys,
allLiteral,
hasTemplateLiteral
} = extractNormalizedKeys(path.node);
if (keys.length === 0) {
return [impureComputedPropertyDeclarators, restElement.argument, core.types.callExpression(getExtendsHelper(file), [core.types.objectExpression([]), core.types.sequenceExpression([core.types.callExpression(file.addHelper("objectDestructuringEmpty"), [core.types.cloneNode(objRef)]), core.types.cloneNode(objRef)])])];
}
let keyExpression;
if (!allLiteral) {
keyExpression = core.types.callExpression(core.types.memberExpression(core.types.arrayExpression(keys), core.types.identifier("map")), [file.addHelper("toPropertyKey")]);
} else {
keyExpression = core.types.arrayExpression(keys);
if (!hasTemplateLiteral && !core.types.isProgram(path.scope.block)) {
const program = path.findParent(path => path.isProgram());
const id = path.scope.generateUidIdentifier("excluded");
program.scope.push({
id,
init: keyExpression,
kind: "const"
});
keyExpression = core.types.cloneNode(id);
}
}
return [impureComputedPropertyDeclarators, restElement.argument, core.types.callExpression(file.addHelper(`objectWithoutProperties${objectRestNoSymbols ? "Loose" : ""}`), [core.types.cloneNode(objRef), keyExpression])];
}
function replaceRestElement(parentPath, paramPath, container) {
if (paramPath.isAssignmentPattern()) {
replaceRestElement(parentPath, paramPath.get("left"), container);
return;
}
if (paramPath.isArrayPattern() && hasRestElement(paramPath)) {
const elements = paramPath.get("elements");
for (let i = 0; i < elements.length; i++) {
replaceRestElement(parentPath, elements[i], container);
}
}
if (paramPath.isObjectPattern() && hasRestElement(paramPath)) {
const uid = parentPath.scope.generateUidIdentifier("ref");
const declar = core.types.variableDeclaration("let", [core.types.variableDeclarator(paramPath.node, uid)]);
if (container) {
container.push(declar);
} else {
parentPath.ensureBlock();
parentPath.get("body").unshiftContainer("body", declar);
}
paramPath.replaceWith(core.types.cloneNode(uid));
}
}
return {
name: "proposal-object-rest-spread",
inherits: syntaxObjectRestSpread.default,
visitor: {
Function(path) {
const params = path.get("params");
const paramsWithRestElement = new Set();
const idsInRestParams = new Set();
for (let i = 0; i < params.length; ++i) {
const param = params[i];
if (hasRestElement(param)) {
paramsWithRestElement.add(i);
for (const name of Object.keys(param.getBindingIdentifiers())) {
idsInRestParams.add(name);
}
}
}
let idInRest = false;
const IdentifierHandler = function (path, functionScope) {
const name = path.node.name;
if (path.scope.getBinding(name) === functionScope.getBinding(name) && idsInRestParams.has(name)) {
idInRest = true;
path.stop();
}
};
let i;
for (i = 0; i < params.length && !idInRest; ++i) {
const param = params[i];
if (!paramsWithRestElement.has(i)) {
if (param.isReferencedIdentifier() || param.isBindingIdentifier()) {
IdentifierHandler(param, path.scope);
} else {
param.traverse({
"Scope|TypeAnnotation|TSTypeAnnotation": path => path.skip(),
"ReferencedIdentifier|BindingIdentifier": IdentifierHandler
}, path.scope);
}
}
}
if (!idInRest) {
for (let i = 0; i < params.length; ++i) {
const param = params[i];
if (paramsWithRestElement.has(i)) {
replaceRestElement(path, param);
}
}
} else {
const shouldTransformParam = idx => idx >= i - 1 || paramsWithRestElement.has(idx);
pluginTransformParameters.convertFunctionParams(path, ignoreFunctionLength, shouldTransformParam, replaceRestElement);
}
},
VariableDeclarator(path, file) {
if (!path.get("id").isObjectPattern()) {
return;
}
let insertionPath = path;
const originalPath = path;
visitRestElements(path.get("id"), path => {
if (!path.parentPath.isObjectPattern()) {
return;
}
if (
shouldStoreRHSInTemporaryVariable(originalPath.node.id) && !core.types.isIdentifier(originalPath.node.init)) {
const initRef = path.scope.generateUidIdentifierBasedOnNode(originalPath.node.init, "ref");
originalPath.insertBefore(core.types.variableDeclarator(initRef, originalPath.node.init));
originalPath.replaceWith(core.types.variableDeclarator(originalPath.node.id, core.types.cloneNode(initRef)));
return;
}
let ref = originalPath.node.init;
const refPropertyPath = [];
let kind;
path.findParent(path => {
if (path.isObjectProperty()) {
refPropertyPath.unshift(path);
} else if (path.isVariableDeclarator()) {
kind = path.parentPath.node.kind;
return true;
}
});
const impureObjRefComputedDeclarators = replaceImpureComputedKeys(refPropertyPath, path.scope);
refPropertyPath.forEach(prop => {
const {
node
} = prop;
ref = core.types.memberExpression(ref, core.types.cloneNode(node.key), node.computed || core.types.isLiteral(node.key));
});
const objectPatternPath = path.findParent(path => path.isObjectPattern());
const [impureComputedPropertyDeclarators, argument, callExpression] = createObjectRest(objectPatternPath, file, ref);
if (pureGetters) {
removeUnusedExcludedKeys(objectPatternPath);
}
core.types.assertIdentifier(argument);
insertionPath.insertBefore(impureComputedPropertyDeclarators);
insertionPath.insertBefore(impureObjRefComputedDeclarators);
insertionPath = insertionPath.insertAfter(core.types.variableDeclarator(argument, callExpression))[0];
path.scope.registerBinding(kind, insertionPath);
if (objectPatternPath.node.properties.length === 0) {
objectPatternPath.findParent(path => path.isObjectProperty() || path.isVariableDeclarator()).remove();
}
});
},
ExportNamedDeclaration(path) {
const declaration = path.get("declaration");
if (!declaration.isVariableDeclaration()) return;
const hasRest = declaration.get("declarations").some(path => hasObjectPatternRestElement(path.get("id")));
if (!hasRest) return;
const specifiers = [];
for (const name of Object.keys(path.getOuterBindingIdentifiers(true))) {
specifiers.push(core.types.exportSpecifier(core.types.identifier(name), core.types.identifier(name)));
}
path.replaceWith(declaration.node);
path.insertAfter(core.types.exportNamedDeclaration(null, specifiers));
},
CatchClause(path) {
const paramPath = path.get("param");
replaceRestElement(path, paramPath);
},
AssignmentExpression(path, file) {
const leftPath = path.get("left");
if (leftPath.isObjectPattern() && hasRestElement(leftPath)) {
const nodes = [];
const refName = path.scope.generateUidBasedOnNode(path.node.right, "ref");
nodes.push(core.types.variableDeclaration("var", [core.types.variableDeclarator(core.types.identifier(refName), path.node.right)]));
const [impureComputedPropertyDeclarators, argument, callExpression] = createObjectRest(leftPath, file, core.types.identifier(refName));
if (impureComputedPropertyDeclarators.length > 0) {
nodes.push(core.types.variableDeclaration("var", impureComputedPropertyDeclarators));
}
const nodeWithoutSpread = core.types.cloneNode(path.node);
nodeWithoutSpread.right = core.types.identifier(refName);
nodes.push(core.types.expressionStatement(nodeWithoutSpread));
nodes.push(core.types.expressionStatement(core.types.assignmentExpression("=", argument, callExpression)));
nodes.push(core.types.expressionStatement(core.types.identifier(refName)));
path.replaceWithMultiple(nodes);
}
},
ForXStatement(path) {
const {
node,
scope
} = path;
const leftPath = path.get("left");
const left = node.left;
if (!hasObjectPatternRestElement(leftPath)) {
return;
}
if (!core.types.isVariableDeclaration(left)) {
const temp = scope.generateUidIdentifier("ref");
node.left = core.types.variableDeclaration("var", [core.types.variableDeclarator(temp)]);
path.ensureBlock();
const body = path.node.body;
if (body.body.length === 0 && path.isCompletionRecord()) {
body.body.unshift(core.types.expressionStatement(scope.buildUndefinedNode()));
}
body.body.unshift(core.types.expressionStatement(core.types.assignmentExpression("=", left, core.types.cloneNode(temp))));
} else {
const pattern = left.declarations[0].id;
const key = scope.generateUidIdentifier("ref");
node.left = core.types.variableDeclaration(left.kind, [core.types.variableDeclarator(key, null)]);
path.ensureBlock();
const body = node.body;
body.body.unshift(core.types.variableDeclaration(node.left.kind, [core.types.variableDeclarator(pattern, core.types.cloneNode(key))]));
}
},
ArrayPattern(path) {
const objectPatterns = [];
visitRestElements(path, path => {
if (!path.parentPath.isObjectPattern()) {
return;
}
const objectPattern = path.parentPath;
const uid = path.scope.generateUidIdentifier("ref");
objectPatterns.push(core.types.variableDeclarator(objectPattern.node, uid));
objectPattern.replaceWith(core.types.cloneNode(uid));
path.skip();
});
if (objectPatterns.length > 0) {
const statementPath = path.getStatementParent();
const statementNode = statementPath.node;
const kind = statementNode.type === "VariableDeclaration" ? statementNode.kind : "var";
statementPath.insertAfter(core.types.variableDeclaration(kind, objectPatterns));
}
},
ObjectExpression(path, file) {
if (!hasSpread(path.node)) return;
let helper;
if (setSpreadProperties) {
helper = getExtendsHelper(file);
} else {
try {
helper = file.addHelper("objectSpread2");
} catch (_unused) {
this.file.declarations["objectSpread2"] = null;
helper = file.addHelper("objectSpread");
}
}
let exp = null;
let props = [];
function make() {
const hadProps = props.length > 0;
const obj = core.types.objectExpression(props);
props = [];
if (!exp) {
exp = core.types.callExpression(helper, [obj]);
return;
}
if (pureGetters) {
if (hadProps) {
exp.arguments.push(obj);
}
return;
}
exp = core.types.callExpression(core.types.cloneNode(helper), [exp,
...(hadProps ? [core.types.objectExpression([]), obj] : [])]);
}
for (const prop of path.node.properties) {
if (core.types.isSpreadElement(prop)) {
make();
exp.arguments.push(prop.argument);
} else {
props.push(prop);
}
}
if (props.length) make();
path.replaceWith(exp);
}
}
};
});
exports["default"] = index;
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