145 lines
4.9 KiB
JavaScript
145 lines
4.9 KiB
JavaScript
"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.default = convertFunctionParams;
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var _core = require("@babel/core");
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var _shadowUtils = require("./shadow-utils.js");
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const buildDefaultParam = _core.template.statement(`
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let VARIABLE_NAME =
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arguments.length > ARGUMENT_KEY && arguments[ARGUMENT_KEY] !== undefined ?
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arguments[ARGUMENT_KEY]
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:
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DEFAULT_VALUE;
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`);
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const buildLooseDefaultParam = _core.template.statement(`
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if (ASSIGNMENT_IDENTIFIER === UNDEFINED) {
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ASSIGNMENT_IDENTIFIER = DEFAULT_VALUE;
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}
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`);
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const buildLooseDestructuredDefaultParam = _core.template.statement(`
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let ASSIGNMENT_IDENTIFIER = PARAMETER_NAME === UNDEFINED ? DEFAULT_VALUE : PARAMETER_NAME ;
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`);
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const buildSafeArgumentsAccess = _core.template.statement(`
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let $0 = arguments.length > $1 ? arguments[$1] : undefined;
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`);
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function convertFunctionParams(path, ignoreFunctionLength, shouldTransformParam, replaceRestElement) {
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const params = path.get("params");
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const isSimpleParameterList = params.every(param => param.isIdentifier());
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if (isSimpleParameterList) return false;
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const {
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node,
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scope
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} = path;
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const body = [];
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const shadowedParams = new Set();
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for (const param of params) {
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(0, _shadowUtils.collectShadowedParamsNames)(param, scope, shadowedParams);
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}
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const state = {
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needsOuterBinding: false,
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scope
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};
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if (shadowedParams.size === 0) {
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for (const param of params) {
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if (!param.isIdentifier()) param.traverse(_shadowUtils.iifeVisitor, state);
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if (state.needsOuterBinding) break;
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}
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}
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let firstOptionalIndex = null;
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for (let i = 0; i < params.length; i++) {
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const param = params[i];
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if (shouldTransformParam && !shouldTransformParam(i)) {
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continue;
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}
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const transformedRestNodes = [];
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if (replaceRestElement) {
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replaceRestElement(path, param, transformedRestNodes);
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}
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const paramIsAssignmentPattern = param.isAssignmentPattern();
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if (paramIsAssignmentPattern && (ignoreFunctionLength || _core.types.isMethod(node, {
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kind: "set"
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}))) {
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const left = param.get("left");
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const right = param.get("right");
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const undefinedNode = scope.buildUndefinedNode();
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if (left.isIdentifier()) {
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body.push(buildLooseDefaultParam({
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ASSIGNMENT_IDENTIFIER: _core.types.cloneNode(left.node),
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DEFAULT_VALUE: right.node,
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UNDEFINED: undefinedNode
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}));
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param.replaceWith(left.node);
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} else if (left.isObjectPattern() || left.isArrayPattern()) {
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const paramName = scope.generateUidIdentifier();
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body.push(buildLooseDestructuredDefaultParam({
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ASSIGNMENT_IDENTIFIER: left.node,
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DEFAULT_VALUE: right.node,
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PARAMETER_NAME: _core.types.cloneNode(paramName),
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UNDEFINED: undefinedNode
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}));
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param.replaceWith(paramName);
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}
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} else if (paramIsAssignmentPattern) {
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if (firstOptionalIndex === null) firstOptionalIndex = i;
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const left = param.get("left");
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const right = param.get("right");
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const defNode = buildDefaultParam({
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VARIABLE_NAME: left.node,
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DEFAULT_VALUE: right.node,
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ARGUMENT_KEY: _core.types.numericLiteral(i)
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});
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body.push(defNode);
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} else if (firstOptionalIndex !== null) {
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const defNode = buildSafeArgumentsAccess([param.node, _core.types.numericLiteral(i)]);
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body.push(defNode);
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} else if (param.isObjectPattern() || param.isArrayPattern()) {
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const uid = path.scope.generateUidIdentifier("ref");
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uid.typeAnnotation = param.node.typeAnnotation;
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const defNode = _core.types.variableDeclaration("let", [_core.types.variableDeclarator(param.node, uid)]);
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body.push(defNode);
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param.replaceWith(_core.types.cloneNode(uid));
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}
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if (transformedRestNodes) {
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for (const transformedNode of transformedRestNodes) {
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body.push(transformedNode);
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}
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}
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}
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if (firstOptionalIndex !== null) {
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node.params = node.params.slice(0, firstOptionalIndex);
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}
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path.ensureBlock();
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const path2 = path;
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const {
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async,
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generator
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} = node;
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if (generator || state.needsOuterBinding || shadowedParams.size > 0) {
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body.push((0, _shadowUtils.buildScopeIIFE)(shadowedParams, path2.node.body));
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path.set("body", _core.types.blockStatement(body));
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const bodyPath = path2.get("body.body");
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const arrowPath = bodyPath[bodyPath.length - 1].get("argument.callee");
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arrowPath.arrowFunctionToExpression();
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arrowPath.node.generator = generator;
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arrowPath.node.async = async;
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node.generator = false;
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node.async = false;
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if (async && !generator) {
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path2.node.body = _core.template.statement.ast`{
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try {
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${path2.node.body.body}
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} catch (e) {
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return Promise.reject(e);
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}
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}`;
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}
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} else {
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path2.get("body").unshiftContainer("body", body);
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}
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return true;
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}
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//# sourceMappingURL=params.js.map
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