| // Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'package:analyzer/dart/ast/ast.dart'; |
| import 'package:analyzer/dart/ast/visitor.dart'; |
| |
| import '../analyzer.dart'; |
| |
| const _desc = r"Don't declare multiple variables on a single line."; |
| |
| const _details = r''' |
| |
| **DON'T** declare multiple variables on a single line. |
| |
| **BAD:** |
| ```dart |
| String? foo, bar, baz; |
| ``` |
| |
| **GOOD:** |
| ```dart |
| String? foo; |
| String? bar; |
| String? baz; |
| ``` |
| |
| '''; |
| |
| class AvoidMultipleDeclarationsPerLine extends LintRule |
| implements NodeLintRule { |
| AvoidMultipleDeclarationsPerLine() |
| : super( |
| name: 'avoid_multiple_declarations_per_line', |
| description: _desc, |
| details: _details, |
| group: Group.style); |
| |
| @override |
| void registerNodeProcessors( |
| NodeLintRegistry registry, LinterContext context) { |
| var visitor = _Visitor(this); |
| registry.addVariableDeclarationList(this, visitor); |
| } |
| } |
| |
| class _Visitor extends SimpleAstVisitor { |
| final LintRule rule; |
| |
| _Visitor(this.rule); |
| |
| @override |
| void visitVariableDeclarationList(VariableDeclarationList node) { |
| var variables = node.variables; |
| |
| if (variables.length > 1) { |
| var secondVariable = variables[1]; |
| rule.reportLint(secondVariable.name); |
| } |
| } |
| } |