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// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using ICSharpCode.NRefactory.Semantics;
using ICSharpCode.NRefactory.TypeSystem;
namespace ICSharpCode.NRefactory.CSharp.Resolver
{
/// <summary>
/// Represents the result of an await expression.
/// </summary>
public class AwaitResolveResult : ResolveResult
{
/// <summary>
/// The method representing the GetAwaiter() call. Can be an <see cref="InvocationResolveResult"/> or a <see cref="DynamicInvocationResolveResult"/>.
/// </summary>
public readonly ResolveResult GetAwaiterInvocation;
/// <summary>
/// Awaiter type. Will not be null (but can be UnknownType).
/// </summary>
public readonly IType AwaiterType;
/// <summary>
/// Property representing the IsCompleted property on the awaiter type. Can be null if the awaiter type or the property was not found, or when awaiting a dynamic expression.
/// </summary>
public readonly IProperty IsCompletedProperty;
/// <summary>
/// Method representing the OnCompleted method on the awaiter type. Can be null if the awaiter type or the method was not found, or when awaiting a dynamic expression.
/// This can also refer to an UnsafeOnCompleted method, if the awaiter type implements <c>System.Runtime.CompilerServices.ICriticalNotifyCompletion</c>.
/// </summary>
public readonly IMethod OnCompletedMethod;
/// <summary>
/// Method representing the GetResult method on the awaiter type. Can be null if the awaiter type or the method was not found, or when awaiting a dynamic expression.
/// </summary>
public readonly IMethod GetResultMethod;
public AwaitResolveResult(IType resultType, ResolveResult getAwaiterInvocation, IType awaiterType, IProperty isCompletedProperty, IMethod onCompletedMethod, IMethod getResultMethod)
: base(resultType)
{
if (awaiterType == null)
throw new ArgumentNullException("awaiterType");
if (getAwaiterInvocation == null)
throw new ArgumentNullException("getAwaiterInvocation");
this.GetAwaiterInvocation = getAwaiterInvocation;
this.AwaiterType = awaiterType;
this.IsCompletedProperty = isCompletedProperty;
this.OnCompletedMethod = onCompletedMethod;
this.GetResultMethod = getResultMethod;
}
public override bool IsError {
get { return this.GetAwaiterInvocation.IsError || (AwaiterType.Kind != TypeKind.Dynamic && (this.IsCompletedProperty == null || this.OnCompletedMethod == null || this.GetResultMethod == null)); }
}
public override IEnumerable<ResolveResult> GetChildResults() {
return new[] { GetAwaiterInvocation };
}
}
}
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