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/analysis_rule/analysis_rule.dart';
import 'package:analyzer/analysis_rule/rule_context.dart';
import 'package:analyzer/analysis_rule/rule_visitor_registry.dart';
import 'package:analyzer/dart/ast/ast.dart';
import 'package:analyzer/dart/ast/visitor.dart';
import 'package:analyzer/error/error.dart';

import '../analyzer.dart';
import '../diagnostic.dart' as diag;
import 'control_flow_in_finally.dart';

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

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

  @override
  DiagnosticCode get diagnosticCode => diag.throwInFinally;

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

class _Visitor(@override final AnalysisRule rule)
    extends SimpleAstVisitor<void>
    with ControlFlowInFinallyBlockReporter {
  @override
  void visitThrowExpression(ThrowExpression node) {
    reportIfFinallyAncestorExists(node, kind: 'throw');
  }
}