Language/Statements/Try/syntax_t01.dart

// Copyright (c) 2011, 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.

/// @assertion The try statement supports the definition of exception handling
/// code in a structured way.
/// tryStatement:
///   try block (onPart+ finallyPart? | finallyPart)
/// ;
/// onPart:
///   catchPart block |
///   on type catchPart? block
/// ;
/// catchPart:
///   catch ‘(’ identifier (‘, ’ identifier)? ‘)’
/// ;
/// finallyPart:
///   finally block
/// ;
/// A try statement consists of a block statement, followed by at least one of:
/// 1. A set of on-catch clauses, each of which specifies (either explicitly or
///    implicitly) the type of exception object to be handled, one or two
///    exception parameters and a block statement.
/// 2. A finally clause, which consists of a block statement.
/// @description Checks that various valid variations of the try statement do not
/// cause a compile-time error.
/// @author rodionov


main() {
  try {
    throw "";
  }
  on int catch (ok) {}
  catch (ok) {}
  finally {}

  try {
    throw "";
  }
  on int catch (ok, st) {}
  catch (wtvr) {}
  finally {}

  try {
    throw "";
  }
  on int catch (ok, st) {}
  on String catch (ok, st) {}

  try {
    try {
      throw "";
    } finally {}
  } catch (ok) {}

  try {
    throw 1;
  }
  on int catch (x) {}
  on double catch (x) {}

  try {
    throw 1;
  }
  on int catch (x) {}
  on num catch (x) {}
  on Object catch (x) {}
}