66 lines
2.1 KiB
JavaScript
66 lines
2.1 KiB
JavaScript
/**
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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("../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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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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},
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schema: []
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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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// Get the whole line and cut it off at the start of the comment
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const startLine = String(sourceCode.lines[node.loc.start.line - 1]);
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const endLine = String(sourceCode.lines[node.loc.end.line - 1]);
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const preamble = startLine.slice(0, node.loc.start.column).trim();
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// Also check after the comment
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const postamble = endLine.slice(node.loc.end.column).trim();
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// Check that this comment isn't an ESLint directive
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const isDirective = astUtils.isDirectiveComment(node);
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// Should be empty if there was only whitespace around the comment
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if (!isDirective && (preamble || postamble)) {
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context.report({ node, message: "Unexpected comment inline with code." });
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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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