/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.Dynamic.Utils;
#if !FEATURE_CORE_DLR
namespace Microsoft.Scripting.Ast {
#else
namespace System.Linq.Expressions {
#endif
///
/// Used to denote the target of a .
///
public sealed class LabelTarget {
private readonly Type _type;
private readonly string _name;
internal LabelTarget(Type type, string name) {
_type = type;
_name = name;
}
///
/// Gets the name of the label.
///
/// The label's name is provided for information purposes only.
public string Name {
get { return _name; }
}
///
/// The type of value that is passed when jumping to the label
/// (or System.Void if no value should be passed).
///
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1721:PropertyNamesShouldNotMatchGetMethods")]
public Type Type {
get { return _type; }
}
///
/// Returns a that represents the current .
///
/// A that represents the current .
public override string ToString() {
return String.IsNullOrEmpty(this.Name) ? "UnamedLabel" : this.Name;
}
}
public partial class Expression {
///
/// Creates a representing a label with void type and no name.
///
/// The new .
public static LabelTarget Label() {
return Label(typeof(void), null);
}
///
/// Creates a representing a label with void type and the given name.
///
/// The name of the label.
/// The new .
public static LabelTarget Label(string name) {
return Label(typeof(void), name);
}
///
/// Creates a representing a label with the given type.
///
/// The type of value that is passed when jumping to the label.
/// The new .
public static LabelTarget Label(Type type) {
return Label(type, null);
}
///
/// Creates a representing a label with the given type and name.
///
/// The type of value that is passed when jumping to the label.
/// The name of the label.
/// The new .
public static LabelTarget Label(Type type, string name) {
ContractUtils.RequiresNotNull(type, "type");
TypeUtils.ValidateType(type);
return new LabelTarget(type, name);
}
}
}