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rOACCT/node_modules/@babel/plugin-transform-for-of/lib/no-helper-implementation.js
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no-helper-implementation.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = transformWithoutHelper;
var _core = require("@babel/core");
function transformWithoutHelper(loose, path, state) {
const pushComputedProps = loose ? pushComputedPropsLoose : pushComputedPropsSpec;
const {
node
} = path;
const build = pushComputedProps(path, state);
const declar = build.declar;
const loop = build.loop;
const block = loop.body;
path.ensureBlock();
if (declar) {
block.body.push(declar);
}
block.body = block.body.concat(node.body.body);
_core.types.inherits(loop, node);
_core.types.inherits(loop.body, node.body);
if (build.replaceParent) {
path.parentPath.replaceWithMultiple(build.node);
path.remove();
} else {
path.replaceWithMultiple(build.node);
}
}
const buildForOfLoose = (0, _core.template)(`
for (var LOOP_OBJECT = OBJECT,
IS_ARRAY = Array.isArray(LOOP_OBJECT),
INDEX = 0,
LOOP_OBJECT = IS_ARRAY ? LOOP_OBJECT : LOOP_OBJECT[Symbol.iterator]();;) {
INTERMEDIATE;
if (IS_ARRAY) {
if (INDEX >= LOOP_OBJECT.length) break;
ID = LOOP_OBJECT[INDEX++];
} else {
INDEX = LOOP_OBJECT.next();
if (INDEX.done) break;
ID = INDEX.value;
}
}
`);
const buildForOf = (0, _core.template)(`
var ITERATOR_COMPLETION = true;
var ITERATOR_HAD_ERROR_KEY = false;
var ITERATOR_ERROR_KEY = undefined;
try {
for (
var ITERATOR_KEY = OBJECT[Symbol.iterator](), STEP_KEY;
!(ITERATOR_COMPLETION = (STEP_KEY = ITERATOR_KEY.next()).done);
ITERATOR_COMPLETION = true
) {}
} catch (err) {
ITERATOR_HAD_ERROR_KEY = true;
ITERATOR_ERROR_KEY = err;
} finally {
try {
if (!ITERATOR_COMPLETION && ITERATOR_KEY.return != null) {
ITERATOR_KEY.return();
}
} finally {
if (ITERATOR_HAD_ERROR_KEY) {
throw ITERATOR_ERROR_KEY;
}
}
}
`);
function pushComputedPropsLoose(path, file) {
const {
node,
scope,
parent
} = path;
const {
left
} = node;
let declar, id, intermediate;
if (_core.types.isIdentifier(left) || _core.types.isPattern(left) || _core.types.isMemberExpression(left)) {
id = left;
intermediate = null;
} else if (_core.types.isVariableDeclaration(left)) {
id = scope.generateUidIdentifier("ref");
declar = _core.types.variableDeclaration(left.kind, [_core.types.variableDeclarator(left.declarations[0].id, _core.types.identifier(id.name))]);
intermediate = _core.types.variableDeclaration("var", [_core.types.variableDeclarator(_core.types.identifier(id.name))]);
} else {
throw file.buildCodeFrameError(left, `Unknown node type ${left.type} in ForStatement`);
}
const iteratorKey = scope.generateUidIdentifier("iterator");
const isArrayKey = scope.generateUidIdentifier("isArray");
const loop = buildForOfLoose({
LOOP_OBJECT: iteratorKey,
IS_ARRAY: isArrayKey,
OBJECT: node.right,
INDEX: scope.generateUidIdentifier("i"),
ID: id,
INTERMEDIATE: intermediate
});
const isLabeledParent = _core.types.isLabeledStatement(parent);
let labeled;
if (isLabeledParent) {
labeled = _core.types.labeledStatement(parent.label, loop);
}
return {
replaceParent: isLabeledParent,
declar: declar,
node: labeled || loop,
loop: loop
};
}
function pushComputedPropsSpec(path, file) {
const {
node,
scope,
parent
} = path;
const left = node.left;
let declar;
const stepKey = scope.generateUid("step");
const stepValue = _core.types.memberExpression(_core.types.identifier(stepKey), _core.types.identifier("value"));
if (_core.types.isIdentifier(left) || _core.types.isPattern(left) || _core.types.isMemberExpression(left)) {
declar = _core.types.expressionStatement(_core.types.assignmentExpression("=", left, stepValue));
} else if (_core.types.isVariableDeclaration(left)) {
declar = _core.types.variableDeclaration(left.kind, [_core.types.variableDeclarator(left.declarations[0].id, stepValue)]);
} else {
throw file.buildCodeFrameError(left, `Unknown node type ${left.type} in ForStatement`);
}
const template = buildForOf({
ITERATOR_HAD_ERROR_KEY: scope.generateUidIdentifier("didIteratorError"),
ITERATOR_COMPLETION: scope.generateUidIdentifier("iteratorNormalCompletion"),
ITERATOR_ERROR_KEY: scope.generateUidIdentifier("iteratorError"),
ITERATOR_KEY: scope.generateUidIdentifier("iterator"),
STEP_KEY: _core.types.identifier(stepKey),
OBJECT: node.right
});
const isLabeledParent = _core.types.isLabeledStatement(parent);
const tryBody = template[3].block.body;
const loop = tryBody[0];
if (isLabeledParent) {
tryBody[0] = _core.types.labeledStatement(parent.label, loop);
}
return {
replaceParent: isLabeledParent,
declar: declar,
loop: loop,
node: template
};
}
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