diff options
Diffstat (limited to 'node_modules/babel-helper-evaluate-path')
| -rw-r--r-- | node_modules/babel-helper-evaluate-path/LICENSE | 22 | ||||
| -rw-r--r-- | node_modules/babel-helper-evaluate-path/README.md | 35 | ||||
| -rw-r--r-- | node_modules/babel-helper-evaluate-path/lib/index.js | 337 | ||||
| -rw-r--r-- | node_modules/babel-helper-evaluate-path/package.json | 16 |
4 files changed, 0 insertions, 410 deletions
diff --git a/node_modules/babel-helper-evaluate-path/LICENSE b/node_modules/babel-helper-evaluate-path/LICENSE deleted file mode 100644 index f9f0a7f3..00000000 --- a/node_modules/babel-helper-evaluate-path/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-helper-evaluate-path/README.md b/node_modules/babel-helper-evaluate-path/README.md deleted file mode 100644 index 7f32eb10..00000000 --- a/node_modules/babel-helper-evaluate-path/README.md +++ /dev/null @@ -1,35 +0,0 @@ -# babel-helper-evaluate-path - -A wrapper for babel's `path.evaluate` - -Fixes / Features: - -+ Detect usages before initialization / declaration - -```js -function foo() { - console.log(b); // ReferenceError - let b = 1; -} - -function bar() { - console.log(a); // a is void 0 - var a = 5; - console.log(a); // 5 -} -``` - -+ Detect usages in scopes outside of initialization for vars (hoisted) - -```js -function foo() { - if (a) var x = 5; - console.log(x); // cannot determine -} -``` - -## Installation - -```sh -npm install babel-helper-evaluate-path --save-dev -``` diff --git a/node_modules/babel-helper-evaluate-path/lib/index.js b/node_modules/babel-helper-evaluate-path/lib/index.js deleted file mode 100644 index d7fe0a11..00000000 --- a/node_modules/babel-helper-evaluate-path/lib/index.js +++ /dev/null @@ -1,337 +0,0 @@ -"use strict"; - -function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); } - -function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } - -function _iterableToArrayLimit(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } - -function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; } - -module.exports = function evaluate(path, { - tdz = false -} = {}) { - if (!tdz && !path.isReferencedIdentifier()) { - return baseEvaluate(path); - } - - if (path.isReferencedIdentifier()) { - return evaluateIdentifier(path); - } - - const state = { - confident: true - }; // prepare - - path.traverse({ - Scope(scopePath) { - scopePath.skip(); - }, - - ReferencedIdentifier(idPath) { - const binding = idPath.scope.getBinding(idPath.node.name); // don't deopt globals - // let babel take care of it - - if (!binding) return; - const evalResult = evaluateIdentifier(idPath); - - if (!evalResult.confident) { - state.confident = evalResult.confident; - state.deoptPath = evalResult.deoptPath; - } - } - - }); - - if (!state.confident) { - return state; - } - - return baseEvaluate(path); -}; - -function baseEvaluate(path) { - try { - return path.evaluate(); - } catch (e) { - return { - confident: false, - error: e - }; - } -} // Original Source: -// https://github.com/babel/babel/blob/master/packages/babel-traverse/src/path/evaluation.js -// modified for Babel-minify use - - -function evaluateIdentifier(path) { - if (!path.isReferencedIdentifier()) { - throw new Error(`Expected ReferencedIdentifier. Got ${path.type}`); - } - - const node = path.node; - const binding = path.scope.getBinding(node.name); - - if (!binding) { - const name = node.name; - - if (!name) { - return deopt(path); - } - - switch (name) { - case "undefined": - return { - confident: true, - value: undefined - }; - - case "NaN": - return { - confident: true, - value: NaN - }; - - case "Infinity": - return { - confident: true, - value: Infinity - }; - - default: - return deopt(path); - } - } - - if (binding.constantViolations.length > 0) { - return deopt(binding.path); - } // referenced in a different scope - deopt - - - if (shouldDeoptBasedOnScope(binding, path)) { - return deopt(path); - } // let/var/const referenced before init - // or "var" referenced in an outer scope - - - const flowEvalResult = evaluateBasedOnControlFlow(binding, path); - - if (flowEvalResult.confident) { - return flowEvalResult; - } - - if (flowEvalResult.shouldDeopt) { - return deopt(path); - } - - return path.evaluate(); -} // check if referenced in a different fn scope -// we can't determine if this function is called sync or async -// if the binding is in program scope -// all it's references inside a different function should be deopted - - -function shouldDeoptBasedOnScope(binding, refPath) { - if (binding.scope.path.isProgram() && refPath.scope !== binding.scope) { - return true; - } - - return false; -} - -function evaluateBasedOnControlFlow(binding, refPath) { - if (binding.kind === "var") { - // early-exit - const declaration = binding.path.parentPath; - - if (declaration.parentPath) { - /** - * Handle when binding is created inside a parent block and - * the corresponding parent is removed by other plugins - * if (false) { var a } -> var a - */ - if (declaration.parentPath.removed) { - return { - confident: true, - value: void 0 - }; - } - - if (declaration.parentPath.isIfStatement() || declaration.parentPath.isLoop() || declaration.parentPath.isSwitchCase()) { - return { - shouldDeopt: true - }; - } - } - - const fnParent = (binding.path.scope.getFunctionParent() || binding.path.scope.getProgramParent()).path; - let blockParentPath = binding.path.scope.getBlockParent().path; - let blockParent = blockParentPath.node; - - if (blockParentPath === fnParent && !fnParent.isProgram()) { - blockParent = blockParent.body; - } // detect Usage Outside Init Scope - - - const blockBody = blockParent.body; - - if (Array.isArray(blockBody) && !blockBody.some(stmt => isAncestor(stmt, refPath))) { - return { - shouldDeopt: true - }; - } // Detect usage before init - - - const stmts = fnParent.isProgram() ? fnParent.node.body : fnParent.node.body.body; - const compareResult = compareBindingAndReference({ - binding, - refPath, - stmts - }); - - if (compareResult.reference && compareResult.binding) { - if (compareResult.reference.scope === "current" && compareResult.reference.idx < compareResult.binding.idx) { - return { - confident: true, - value: void 0 - }; - } - } - } else if (binding.kind === "let" || binding.kind === "const") { - // binding.path is the declarator - const declarator = binding.path; - const declaration = declarator.parentPath; - - if (declaration.parentPath && (declaration.parentPath.isIfStatement() || declaration.parentPath.isLoop() || declaration.parentPath.isSwitchCase())) { - return { - shouldDeopt: true - }; - } - - const scopePath = declarator.scope.path; - let scopeNode = scopePath.node; - - if (scopePath.isFunction() || scopePath.isCatchClause()) { - scopeNode = scopeNode.body; - } // Detect Usage before Init - - - let stmts = scopeNode.body; - - if (!Array.isArray(stmts)) { - stmts = [stmts]; - } - - const compareResult = compareBindingAndReference({ - binding, - refPath, - stmts - }); - - if (compareResult.reference && compareResult.binding) { - if (compareResult.reference.scope === "current" && compareResult.reference.idx < compareResult.binding.idx) { - throw new Error(`ReferenceError: Used ${refPath.node.name}: ` + `${binding.kind} binding before declaration`); - } - - if (compareResult.reference.scope === "other") { - return { - shouldDeopt: true - }; - } - } - } - - return { - confident: false, - shouldDeopt: false - }; -} - -function compareBindingAndReference({ - binding, - refPath, - stmts -}) { - const state = { - binding: null, - reference: null - }; - var _iteratorNormalCompletion = true; - var _didIteratorError = false; - var _iteratorError = undefined; - - try { - for (var _iterator = stmts.entries()[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) { - const _step$value = _slicedToArray(_step.value, 2), - idx = _step$value[0], - stmt = _step$value[1]; - - if (isAncestor(stmt, binding.path)) { - state.binding = { - idx - }; - } - - var _iteratorNormalCompletion2 = true; - var _didIteratorError2 = false; - var _iteratorError2 = undefined; - - try { - for (var _iterator2 = binding.referencePaths[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) { - const ref = _step2.value; - - if (ref === refPath && isAncestor(stmt, ref)) { - state.reference = { - idx, - scope: binding.path.scope === ref.scope ? "current" : "other" - }; - break; - } - } - } catch (err) { - _didIteratorError2 = true; - _iteratorError2 = err; - } finally { - try { - if (!_iteratorNormalCompletion2 && _iterator2.return != null) { - _iterator2.return(); - } - } finally { - if (_didIteratorError2) { - throw _iteratorError2; - } - } - } - } - } catch (err) { - _didIteratorError = true; - _iteratorError = err; - } finally { - try { - if (!_iteratorNormalCompletion && _iterator.return != null) { - _iterator.return(); - } - } finally { - if (_didIteratorError) { - throw _iteratorError; - } - } - } - - return state; -} - -function deopt(deoptPath) { - return { - confident: false, - deoptPath - }; -} -/** - * is nodeParent an ancestor of path - */ - - -function isAncestor(nodeParent, path) { - return !!path.findParent(parent => parent.node === nodeParent); -}
\ No newline at end of file diff --git a/node_modules/babel-helper-evaluate-path/package.json b/node_modules/babel-helper-evaluate-path/package.json deleted file mode 100644 index 9805298e..00000000 --- a/node_modules/babel-helper-evaluate-path/package.json +++ /dev/null @@ -1,16 +0,0 @@ -{ - "name": "babel-helper-evaluate-path", - "version": "0.5.0", - "description": "path.evaluate wrapped in a try catch", - "keywords": [ - "babel-minify", - "babel-plugin" - ], - "homepage": "https://github.com/babel/minify#readme", - "bugs": "https://github.com/babel/minify/issues", - "license": "MIT", - "author": "boopathi", - "main": "lib/index.js", - "repository": "https://github.com/babel/minify/tree/master/packages/babel-helper-evaluate-path", - "gitHead": "4de390008da4a486b37819109d2021a0957ad405" -} |