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// TypeParameterDeclaration.cs
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// Mike Krüger <mkrueger@novell.com>
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// Copyright (c) 2011 Novell, Inc (http://www.novell.com)
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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namespace MonoDevelop.CSharp.Ast
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/// Represents a type parameter.
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/// Note: mirroring the C# syntax, constraints are not part of the type parameter declaration, but belong
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/// to the parent type or method.
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public class TypeParameterDeclaration : AstNode
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public static readonly Role<CSharpTokenNode> VarianceRole = new Role<CSharpTokenNode>("Variance");
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public override NodeType NodeType {
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get { return NodeType.Unknown; }
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public VarianceModifier Variance {
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return GetChildByRole (Roles.Identifier).Name;
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SetChildByRole(Roles.Identifier, new Identifier(value, AstLocation.Empty));
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public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
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return visitor.VisitTypeParameterDeclaration(this, data);
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/// Represents the variance of a type parameter.
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public enum VarianceModifier : byte
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/// The type parameter is not variant.
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/// The type parameter is covariant (used in output position).
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/// The type parameter is contravariant (used in input position).