pkg/linter/lib/src/rules/throw_in_finally.dart

// Copyright (c) 2016, 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';
import '../linter_lint_codes.dart';
import '../rules/control_flow_in_finally.dart';

const _desc = r'Avoid `throw` in `finally` block.';

class ThrowInFinally extends LintRule {
  ThrowInFinally()
      : super(
          name: LintNames.throw_in_finally,
          description: _desc,
        );

  @override
  LintCode get lintCode => LinterLintCode.throw_in_finally;

  @override
  void registerNodeProcessors(
      NodeLintRegistry registry, LinterContext context) {
    var visitor = _Visitor(this);
    registry.addThrowExpression(this, visitor);
  }
}

class _Visitor extends SimpleAstVisitor<void>
    with ControlFlowInFinallyBlockReporter {
  @override
  final LintRule rule;

  _Visitor(this.rule);

  @override
  void visitThrowExpression(ThrowExpression node) {
    reportIfFinallyAncestorExists(node, kind: 'throw');
  }
}