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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/arrow-spacing.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/arrow-spacing.js')
-rw-r--r-- | tools/node_modules/eslint/lib/rules/arrow-spacing.js | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/lib/rules/arrow-spacing.js b/tools/node_modules/eslint/lib/rules/arrow-spacing.js new file mode 100644 index 0000000000..37e03907cb --- /dev/null +++ b/tools/node_modules/eslint/lib/rules/arrow-spacing.js @@ -0,0 +1,149 @@ +/** + * @fileoverview Rule to define spacing before/after arrow function's arrow. + * @author Jxck + */ +"use strict"; + +//------------------------------------------------------------------------------ +// Requirements +//------------------------------------------------------------------------------ + +const astUtils = require("../ast-utils"); + +//------------------------------------------------------------------------------ +// Rule Definition +//------------------------------------------------------------------------------ + +module.exports = { + meta: { + docs: { + description: "enforce consistent spacing before and after the arrow in arrow functions", + category: "ECMAScript 6", + recommended: false + }, + + fixable: "whitespace", + + schema: [ + { + type: "object", + properties: { + before: { + type: "boolean" + }, + after: { + type: "boolean" + } + }, + additionalProperties: false + } + ] + }, + + create(context) { + + // merge rules with default + const rule = { before: true, after: true }, + option = context.options[0] || {}; + + rule.before = option.before !== false; + rule.after = option.after !== false; + + const sourceCode = context.getSourceCode(); + + /** + * Get tokens of arrow(`=>`) and before/after arrow. + * @param {ASTNode} node The arrow function node. + * @returns {Object} Tokens of arrow and before/after arrow. + */ + function getTokens(node) { + const arrow = sourceCode.getTokenBefore(node.body, astUtils.isArrowToken); + + return { + before: sourceCode.getTokenBefore(arrow), + arrow, + after: sourceCode.getTokenAfter(arrow) + }; + } + + /** + * Count spaces before/after arrow(`=>`) token. + * @param {Object} tokens Tokens before/after arrow. + * @returns {Object} count of space before/after arrow. + */ + function countSpaces(tokens) { + const before = tokens.arrow.range[0] - tokens.before.range[1]; + const after = tokens.after.range[0] - tokens.arrow.range[1]; + + return { before, after }; + } + + /** + * Determines whether space(s) before after arrow(`=>`) is satisfy rule. + * if before/after value is `true`, there should be space(s). + * if before/after value is `false`, there should be no space. + * @param {ASTNode} node The arrow function node. + * @returns {void} + */ + function spaces(node) { + const tokens = getTokens(node); + const countSpace = countSpaces(tokens); + + if (rule.before) { + + // should be space(s) before arrow + if (countSpace.before === 0) { + context.report({ + node: tokens.before, + message: "Missing space before =>.", + fix(fixer) { + return fixer.insertTextBefore(tokens.arrow, " "); + } + }); + } + } else { + + // should be no space before arrow + if (countSpace.before > 0) { + context.report({ + node: tokens.before, + message: "Unexpected space before =>.", + fix(fixer) { + return fixer.removeRange([tokens.before.range[1], tokens.arrow.range[0]]); + } + }); + } + } + + if (rule.after) { + + // should be space(s) after arrow + if (countSpace.after === 0) { + context.report({ + node: tokens.after, + message: "Missing space after =>.", + fix(fixer) { + return fixer.insertTextAfter(tokens.arrow, " "); + } + }); + } + } else { + + // should be no space after arrow + if (countSpace.after > 0) { + context.report({ + node: tokens.after, + message: "Unexpected space after =>.", + fix(fixer) { + return fixer.removeRange([tokens.arrow.range[1], tokens.after.range[0]]); + } + }); + } + } + } + + return { + ArrowFunctionExpression: spaces + }; + } +}; |