diff options
| author | littleblack111 <littleblack11111@gmail.com> | 2023-10-14 15:31:11 +0800 |
|---|---|---|
| committer | littleblack111 <littleblack11111@gmail.com> | 2023-10-14 15:31:11 +0800 |
| commit | aa773172311dcada759dfbaac485f4bc6e00bc21 (patch) | |
| tree | ca6d9a5eff3ab8f689f9acb4f0df791d9486813d /node_modules/@babel/plugin-transform-for-of/lib/no-helper-implementation.js | |
| parent | c5a5384e846f242e901e859fe600d695d8990a9a (diff) | |
added babel
Diffstat (limited to 'node_modules/@babel/plugin-transform-for-of/lib/no-helper-implementation.js')
| -rw-r--r-- | node_modules/@babel/plugin-transform-for-of/lib/no-helper-implementation.js | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/node_modules/@babel/plugin-transform-for-of/lib/no-helper-implementation.js b/node_modules/@babel/plugin-transform-for-of/lib/no-helper-implementation.js new file mode 100644 index 00000000..ca667085 --- /dev/null +++ b/node_modules/@babel/plugin-transform-for-of/lib/no-helper-implementation.js @@ -0,0 +1,153 @@ +"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.push(...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 = _core.template.statement(` + 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 = _core.template.statements(` + 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, state) { + 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 state.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, state) { + 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 state.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 + }; +} + +//# sourceMappingURL=no-helper-implementation.js.map |
