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Diffstat (limited to 'node_modules/babel-plugin-transform-remove-undefined')
4 files changed, 0 insertions, 352 deletions
diff --git a/node_modules/babel-plugin-transform-remove-undefined/LICENSE b/node_modules/babel-plugin-transform-remove-undefined/LICENSE deleted file mode 100644 index f9f0a7f3..00000000 --- a/node_modules/babel-plugin-transform-remove-undefined/LICENSE +++ /dev/null @@ -1,22 +0,0 @@ -Copyright (c) 2015-2016 Amjad Masad <amjad.masad@gmail.com> - -MIT License - -Permission is hereby granted, free of charge, to any person obtaining -a copy of this software and associated documentation files (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - -The above copyright notice and this permission notice shall be -included in all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND -NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE -LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/node_modules/babel-plugin-transform-remove-undefined/README.md b/node_modules/babel-plugin-transform-remove-undefined/README.md deleted file mode 100644 index 872d740a..00000000 --- a/node_modules/babel-plugin-transform-remove-undefined/README.md +++ /dev/null @@ -1,63 +0,0 @@ -# babel-plugin-transform-remove-undefined - -For variable assignments, this removes rvals that evaluate to `undefined` -(`var`s in functions only). -For functions, this removes return arguments that evaluate to `undefined`. - -## Example - -**In** - -```javascript -let a = void 0; -function foo() { - var b = undefined; - return undefined; -} -``` - -**Out** - -```javascript -let a; -function foo() { - var b; - return; -} -``` - -## Installation - -```sh -npm install babel-plugin-transform-remove-undefined --save-dev -``` - -## Usage - -### Via `.babelrc` (Recommended) - -**.babelrc** - -```json -{ - "plugins": ["babel-plugin-transform-remove-undefined"] -} -``` - -### Via CLI - -```sh -babel --plugins babel-plugin-transform-remove-undefined script.js -``` - -### Via Node API - -```javascript -require("@babel/core").transform("code", { - plugins: ["babel-plugin-transform-remove-undefined"] -}); -``` - -## Options - -+ `tdz` - Detect usages before declaration/initialization in let/const(throws) and var(void 0) diff --git a/node_modules/babel-plugin-transform-remove-undefined/lib/index.js b/node_modules/babel-plugin-transform-remove-undefined/lib/index.js deleted file mode 100644 index 0b09c1d7..00000000 --- a/node_modules/babel-plugin-transform-remove-undefined/lib/index.js +++ /dev/null @@ -1,249 +0,0 @@ -"use strict"; - -const evaluate = require("babel-helper-evaluate-path"); - -function isPureAndUndefined(rval, { - tdz, - scope = { - hasBinding: () => false - } -} = {}) { - if (rval.isIdentifier() && rval.node.name === "undefined") { - // deopt right away if undefined is a local binding - if (scope.hasBinding(rval.node.name, true - /* no globals */ - )) { - return false; - } - - return true; - } - - if (!rval.isPure()) { - return false; - } - - const evaluation = evaluate(rval, { - tdz - }); - return evaluation.confident === true && evaluation.value === undefined; -} - -function getLoopParent(path, scopeParent) { - const parent = path.findParent(p => p.isLoop() || p === scopeParent); // don't traverse higher than the function the var is defined in. - - return parent === scopeParent ? null : parent; -} - -function getFunctionParent(path, scopeParent) { - const parent = path.findParent(p => p.isFunction()); // don't traverse higher than the function the var is defined in. - - return parent === scopeParent ? null : parent; -} - -function getFunctionReferences(path, scopeParent, references = new Set()) { - for (let func = getFunctionParent(path, scopeParent); func; func = getFunctionParent(func, scopeParent)) { - const id = func.node.id; - const binding = id && func.scope.getBinding(id.name); - - if (!binding) { - continue; - } - - binding.referencePaths.forEach(path => { - if (!references.has(path)) { - references.add(path); - getFunctionReferences(path, scopeParent, references); - } - }); - } - - return references; -} - -function hasViolation(declarator, scope, start) { - const binding = scope.getBinding(declarator.node.id.name); - - if (!binding) { - return true; - } - - const scopeParent = declarator.getFunctionParent(); - const violation = binding.constantViolations.some(v => { - // https://github.com/babel/minify/issues/630 - if (!v.node) { - return false; - } // return 'true' if we cannot guarantee the violation references - // the initialized identifier after - - - const violationStart = v.node.start; - - if (violationStart === undefined || violationStart < start) { - return true; - } - - const references = getFunctionReferences(v, scopeParent); - var _iteratorNormalCompletion = true; - var _didIteratorError = false; - var _iteratorError = undefined; - - try { - for (var _iterator = references[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) { - const ref = _step.value; - - if (ref.node.start === undefined || ref.node.start < start) { - return true; - } - } - } catch (err) { - _didIteratorError = true; - _iteratorError = err; - } finally { - try { - if (!_iteratorNormalCompletion && _iterator.return != null) { - _iterator.return(); - } - } finally { - if (_didIteratorError) { - throw _iteratorError; - } - } - } - - for (let loop = getLoopParent(declarator, scopeParent); loop; loop = getLoopParent(loop, scopeParent)) { - if (loop.node.end === undefined || loop.node.end > violationStart) { - return true; - } - } - }); - return violation; -} - -module.exports = function () { - return { - name: "transform-remove-undefined", - visitor: { - SequenceExpression(path, { - opts: { - tdz - } = {} - }) { - const expressions = path.get("expressions"); - - for (let i = 0; i < expressions.length; i++) { - const expr = expressions[i]; - if (!isPureAndUndefined(expr, { - tdz, - scope: path.scope - })) continue; // last value - - if (i === expressions.length - 1) { - if (path.parentPath.isExpressionStatement()) { - expr.remove(); - } - } else { - expr.remove(); - } - } - }, - - ReturnStatement(path, { - opts: { - tdz - } = {} - }) { - if (path.node.argument !== null) { - if (isPureAndUndefined(path.get("argument"), { - tdz, - scope: path.scope - })) { - path.node.argument = null; - } - } - }, - - VariableDeclaration(path, { - opts: { - tdz - } = {} - }) { - switch (path.node.kind) { - case "const": - break; - - case "let": - var _iteratorNormalCompletion2 = true; - var _didIteratorError2 = false; - var _iteratorError2 = undefined; - - try { - for (var _iterator2 = path.get("declarations")[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) { - const declarator = _step2.value; - - if (isPureAndUndefined(declarator.get("init"), { - tdz - })) { - declarator.node.init = null; - } - } - } catch (err) { - _didIteratorError2 = true; - _iteratorError2 = err; - } finally { - try { - if (!_iteratorNormalCompletion2 && _iterator2.return != null) { - _iterator2.return(); - } - } finally { - if (_didIteratorError2) { - throw _iteratorError2; - } - } - } - - break; - - case "var": - const start = path.node.start; - - if (start === undefined) { - // This is common for plugin-generated nodes - break; - } - - const scope = path.scope; - var _iteratorNormalCompletion3 = true; - var _didIteratorError3 = false; - var _iteratorError3 = undefined; - - try { - for (var _iterator3 = path.get("declarations")[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) { - const declarator = _step3.value; - - if (isPureAndUndefined(declarator.get("init")) && !hasViolation(declarator, scope, start)) { - declarator.node.init = null; - } - } - } catch (err) { - _didIteratorError3 = true; - _iteratorError3 = err; - } finally { - try { - if (!_iteratorNormalCompletion3 && _iterator3.return != null) { - _iterator3.return(); - } - } finally { - if (_didIteratorError3) { - throw _iteratorError3; - } - } - } - - break; - } - } - - } - }; -};
\ No newline at end of file diff --git a/node_modules/babel-plugin-transform-remove-undefined/package.json b/node_modules/babel-plugin-transform-remove-undefined/package.json deleted file mode 100644 index 81de8122..00000000 --- a/node_modules/babel-plugin-transform-remove-undefined/package.json +++ /dev/null @@ -1,18 +0,0 @@ -{ - "name": "babel-plugin-transform-remove-undefined", - "version": "0.5.0", - "description": "This removes rvals that are equivalent to undefined wherever possible", - "keywords": [ - "babel-plugin" - ], - "homepage": "https://github.com/babel/minify#readme", - "bugs": "https://github.com/babel/minify/issues", - "license": "MIT", - "author": "shinew", - "main": "lib/index.js", - "repository": "https://github.com/babel/minify/tree/master/packages/babel-plugin-transform-remove-undefined", - "dependencies": { - "babel-helper-evaluate-path": "^0.5.0" - }, - "gitHead": "4de390008da4a486b37819109d2021a0957ad405" -} |