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/** * @fileoverview enforce the location of arrow function bodies * @author Sharmila Jesupaul * @deprecated in ESLint v8.53.0 */ "use strict"; const { isCommentToken, isNotOpeningParenToken } = require("./utils/ast-utils"); //------------------------------------------------------------------------------ // Rule Definition //------------------------------------------------------------------------------ /** @type {import('../shared/types').Rule} */ module.exports = { meta: { deprecated: true, replacedBy: [], type: "layout", docs: { description: "Enforce the location of arrow function bodies", recommended: false, url: "https://eslint.org/docs/latest/rules/implicit-arrow-linebreak" }, fixable: "whitespace", schema: [ { enum: ["beside", "below"] } ], messages: { expected: "Expected a linebreak before this expression.", unexpected: "Expected no linebreak before this expression." } }, create(context) { const sourceCode = context.sourceCode; const option = context.options[0] || "beside"; /** * Validates the location of an arrow function body * @param {ASTNode} node The arrow function body * @returns {void} */ function validateExpression(node) { if (node.body.type === "BlockStatement") { return; } const arrowToken = sourceCode.getTokenBefore(node.body, isNotOpeningParenToken); const firstTokenOfBody = sourceCode.getTokenAfter(arrowToken); if (arrowToken.loc.end.line === firstTokenOfBody.loc.start.line && option === "below") { context.report({ node: firstTokenOfBody, messageId: "expected", fix: fixer => fixer.insertTextBefore(firstTokenOfBody, "\n") }); } else if (arrowToken.loc.end.line !== firstTokenOfBody.loc.start.line && option === "beside") { context.report({ node: firstTokenOfBody, messageId: "unexpected", fix(fixer) { if (sourceCode.getFirstTokenBetween(arrowToken, firstTokenOfBody, { includeComments: true, filter: isCommentToken })) { return null; } return fixer.replaceTextRange([arrowToken.range[1], firstTokenOfBody.range[0]], " "); } }); } } //---------------------------------------------------------------------- // Public //---------------------------------------------------------------------- return { ArrowFunctionExpression: node => validateExpression(node) }; } };