175 lines
4.3 KiB
Plaintext
175 lines
4.3 KiB
Plaintext
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*
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* @format
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*/
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/**
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* This transform strips all Flow types.
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*
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* It is expected that all transforms create valid ESTree AST output. If
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* the transform requires outputting Babel specific AST nodes then it
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* should live in `ConvertESTreeToBabel.js`
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*/
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.transformProgram = transformProgram;
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var _SimpleTransform = require("../transform/SimpleTransform");
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const nodeWith = _SimpleTransform.SimpleTransform.nodeWith;
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function transformProgram(program, _options) {
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return _SimpleTransform.SimpleTransform.transformProgram(program, {
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transform(node) {
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switch (node.type) {
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case 'AsExpression':
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case 'AsConstExpression':
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case 'TypeCastExpression':
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{
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return node.expression;
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}
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case 'CallExpression':
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case 'NewExpression':
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{
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if (node.typeArguments != null) {
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return nodeWith(node, {
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typeArguments: null
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});
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}
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return node;
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}
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case 'ObjectPattern':
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case 'ArrayPattern':
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case 'Identifier':
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{
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if (node.typeAnnotation != null) {
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return nodeWith(node, {
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typeAnnotation: null
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});
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}
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return node;
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}
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case 'DeclareClass':
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case 'DeclareFunction':
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case 'DeclareInterface':
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case 'DeclareModule':
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case 'DeclareModuleExports':
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case 'DeclareNamespace':
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case 'DeclareOpaqueType':
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case 'DeclareTypeAlias':
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case 'DeclareVariable':
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case 'InterfaceDeclaration':
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case 'OpaqueType':
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case 'TypeAlias':
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{
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return null;
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}
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case 'FunctionDeclaration':
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case 'ArrowFunctionExpression':
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case 'FunctionExpression':
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{
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const newParams = [];
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for (let i = 0; i < node.params.length; i++) {
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if (i === 0 && node.params[0].type === 'Identifier' && node.params[0].name === 'this') {
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continue;
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}
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let param = node.params[i];
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if (param.type === 'AssignmentPattern') {
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param = param.left;
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}
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if (param.optional === true) {
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param = nodeWith(param, {
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optional: false
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});
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}
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newParams.push(param);
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}
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return nodeWith(node, {
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params: newParams,
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returnType: null,
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typeParameters: null,
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predicate: null
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});
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}
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case 'ClassDeclaration':
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case 'ClassExpression':
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{
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return nodeWith(node, {
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typeParameters: null,
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superTypeParameters: null,
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implements: [],
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decorators: []
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});
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}
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case 'PropertyDefinition':
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{
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return nodeWith(node, {
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typeAnnotation: null,
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variance: null,
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declare: false,
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optional: false
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});
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}
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case 'ImportDeclaration':
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{
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if (node.importKind === 'type' || node.importKind === 'typeof') {
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return null;
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}
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const nonTypeSpecifiers = node.specifiers.filter(s => s.type !== 'ImportSpecifier' || s.importKind !== 'type' && s.importKind !== 'typeof');
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if (nonTypeSpecifiers.length === 0) {
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return null;
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}
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if (nonTypeSpecifiers.length === node.specifiers.length) {
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return node;
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}
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return nodeWith(node, {
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specifiers: nonTypeSpecifiers
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});
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}
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case 'ExportAllDeclaration':
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case 'ExportNamedDeclaration':
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{
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if (node.exportKind === 'type') {
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return null;
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}
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return node;
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}
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default:
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{
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return node;
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}
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}
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}
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});
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} |