diff options
Diffstat (limited to 'tools/node_modules/eslint/lib/rules/no-extra-semi.js')
-rw-r--r-- | tools/node_modules/eslint/lib/rules/no-extra-semi.js | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/lib/rules/no-extra-semi.js b/tools/node_modules/eslint/lib/rules/no-extra-semi.js new file mode 100644 index 0000000000..acd312b32b --- /dev/null +++ b/tools/node_modules/eslint/lib/rules/no-extra-semi.js @@ -0,0 +1,120 @@ +/** + * @fileoverview Rule to flag use of unnecessary semicolons + * @author Nicholas C. Zakas + */ + +"use strict"; + +//------------------------------------------------------------------------------ +// Requirements +//------------------------------------------------------------------------------ + +const FixTracker = require("../util/fix-tracker"); +const astUtils = require("../ast-utils"); + +//------------------------------------------------------------------------------ +// Rule Definition +//------------------------------------------------------------------------------ + +module.exports = { + meta: { + docs: { + description: "disallow unnecessary semicolons", + category: "Possible Errors", + recommended: true + }, + + fixable: "code", + schema: [] + }, + + create(context) { + const sourceCode = context.getSourceCode(); + + /** + * Reports an unnecessary semicolon error. + * @param {Node|Token} nodeOrToken - A node or a token to be reported. + * @returns {void} + */ + function report(nodeOrToken) { + context.report({ + node: nodeOrToken, + message: "Unnecessary semicolon.", + fix(fixer) { + + /* + * Expand the replacement range to include the surrounding + * tokens to avoid conflicting with semi. + * https://github.com/eslint/eslint/issues/7928 + */ + return new FixTracker(fixer, context.getSourceCode()) + .retainSurroundingTokens(nodeOrToken) + .remove(nodeOrToken); + } + }); + } + + /** + * Checks for a part of a class body. + * This checks tokens from a specified token to a next MethodDefinition or the end of class body. + * + * @param {Token} firstToken - The first token to check. + * @returns {void} + */ + function checkForPartOfClassBody(firstToken) { + for (let token = firstToken; + token.type === "Punctuator" && !astUtils.isClosingBraceToken(token); + token = sourceCode.getTokenAfter(token) + ) { + if (astUtils.isSemicolonToken(token)) { + report(token); + } + } + } + + return { + + /** + * Reports this empty statement, except if the parent node is a loop. + * @param {Node} node - A EmptyStatement node to be reported. + * @returns {void} + */ + EmptyStatement(node) { + const parent = node.parent, + allowedParentTypes = [ + "ForStatement", + "ForInStatement", + "ForOfStatement", + "WhileStatement", + "DoWhileStatement", + "IfStatement", + "LabeledStatement", + "WithStatement" + ]; + + if (allowedParentTypes.indexOf(parent.type) === -1) { + report(node); + } + }, + + /** + * Checks tokens from the head of this class body to the first MethodDefinition or the end of this class body. + * @param {Node} node - A ClassBody node to check. + * @returns {void} + */ + ClassBody(node) { + checkForPartOfClassBody(sourceCode.getFirstToken(node, 1)); // 0 is `{`. + }, + + /** + * Checks tokens from this MethodDefinition to the next MethodDefinition or the end of this class body. + * @param {Node} node - A MethodDefinition node of the start point. + * @returns {void} + */ + MethodDefinition(node) { + checkForPartOfClassBody(sourceCode.getTokenAfter(node)); + } + }; + + } +}; |