90 lines
2.7 KiB
JavaScript
90 lines
2.7 KiB
JavaScript
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/**
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* @fileoverview Enforces or disallows inline comments.
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* @author Greg Cochard
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*/
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"use strict";
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const astUtils = require("./utils/ast-utils");
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = {
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meta: {
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type: "suggestion",
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docs: {
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description: "disallow inline comments after code",
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category: "Stylistic Issues",
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recommended: false,
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url: "https://eslint.org/docs/rules/no-inline-comments"
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},
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schema: [],
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messages: {
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unexpectedInlineComment: "Unexpected comment inline with code."
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}
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},
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create(context) {
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const sourceCode = context.getSourceCode();
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/**
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* Will check that comments are not on lines starting with or ending with code
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* @param {ASTNode} node The comment node to check
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* @private
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* @returns {void}
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*/
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function testCodeAroundComment(node) {
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const startLine = String(sourceCode.lines[node.loc.start.line - 1]),
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endLine = String(sourceCode.lines[node.loc.end.line - 1]),
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preamble = startLine.slice(0, node.loc.start.column).trim(),
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postamble = endLine.slice(node.loc.end.column).trim(),
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isPreambleEmpty = !preamble,
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isPostambleEmpty = !postamble;
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// Nothing on both sides
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if (isPreambleEmpty && isPostambleEmpty) {
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return;
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}
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// JSX Exception
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if (
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(isPreambleEmpty || preamble === "{") &&
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(isPostambleEmpty || postamble === "}")
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) {
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const enclosingNode = sourceCode.getNodeByRangeIndex(node.range[0]);
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if (enclosingNode && enclosingNode.type === "JSXEmptyExpression") {
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return;
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}
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}
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// Don't report ESLint directive comments
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if (astUtils.isDirectiveComment(node)) {
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return;
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}
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context.report({
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node,
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messageId: "unexpectedInlineComment"
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});
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}
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//--------------------------------------------------------------------------
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// Public
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//--------------------------------------------------------------------------
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return {
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Program() {
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const comments = sourceCode.getAllComments();
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comments.filter(token => token.type !== "Shebang").forEach(testCodeAroundComment);
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}
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};
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}
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};
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