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author | Michaël Zasso <targos@protonmail.com> | 2017-12-22 16:53:42 +0100 |
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committer | Michaël Zasso <targos@protonmail.com> | 2018-01-11 09:48:05 +0100 |
commit | 3dc30632755713179f345f4af024bd904c6162d0 (patch) | |
tree | f28c4f6dd6dfc5992edf301449d1a371d229755b /tools/node_modules/eslint/lib/rules/no-undefined.js | |
parent | a2c7085dd4a8e60d1a47572aca8bb6fcb7a32f88 (diff) | |
download | android-node-v8-3dc30632755713179f345f4af024bd904c6162d0.tar.gz android-node-v8-3dc30632755713179f345f4af024bd904c6162d0.tar.bz2 android-node-v8-3dc30632755713179f345f4af024bd904c6162d0.zip |
tools: move eslint from tools to tools/node_modules
This is required because we need to add the babel-eslint dependency
and it has to be able to resolve "eslint".
babel-eslint is required to support future ES features such as async
iterators and import.meta.
Refs: https://github.com/nodejs/node/pull/17755
PR-URL: https://github.com/nodejs/node/pull/17820
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Diffstat (limited to 'tools/node_modules/eslint/lib/rules/no-undefined.js')
-rw-r--r-- | tools/node_modules/eslint/lib/rules/no-undefined.js | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/lib/rules/no-undefined.js b/tools/node_modules/eslint/lib/rules/no-undefined.js new file mode 100644 index 0000000000..7e9f96b921 --- /dev/null +++ b/tools/node_modules/eslint/lib/rules/no-undefined.js @@ -0,0 +1,77 @@ +/** + * @fileoverview Rule to flag references to the undefined variable. + * @author Michael Ficarra + */ +"use strict"; + +//------------------------------------------------------------------------------ +// Rule Definition +//------------------------------------------------------------------------------ + +module.exports = { + meta: { + docs: { + description: "disallow the use of `undefined` as an identifier", + category: "Variables", + recommended: false + }, + + schema: [] + }, + + create(context) { + + /** + * Report an invalid "undefined" identifier node. + * @param {ASTNode} node The node to report. + * @returns {void} + */ + function report(node) { + context.report({ + node, + message: "Unexpected use of undefined." + }); + } + + /** + * Checks the given scope for references to `undefined` and reports + * all references found. + * @param {eslint-scope.Scope} scope The scope to check. + * @returns {void} + */ + function checkScope(scope) { + const undefinedVar = scope.set.get("undefined"); + + if (!undefinedVar) { + return; + } + + const references = undefinedVar.references; + + const defs = undefinedVar.defs; + + // Report non-initializing references (those are covered in defs below) + references + .filter(ref => !ref.init) + .forEach(ref => report(ref.identifier)); + + defs.forEach(def => report(def.name)); + } + + return { + "Program:exit"() { + const globalScope = context.getScope(); + + const stack = [globalScope]; + + while (stack.length) { + const scope = stack.pop(); + + stack.push.apply(stack, scope.childScopes); + checkScope(scope); + } + } + }; + + } +}; |