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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 ICSharpCode.NRefactory.Semantics;
using ICSharpCode.NRefactory.TypeSystem;
namespace ICSharpCode.NRefactory.CSharp.Resolver
{
/// <summary>
/// Allows controlling which nodes are resolved by the resolve visitor.
/// </summary>
/// <seealso cref="ResolveVisitor"/>
public interface IResolveVisitorNavigator
{
/// <summary>
/// Asks the navigator whether to scan, skip, or resolve a node.
/// </summary>
ResolveVisitorNavigationMode Scan(AstNode node);
/// <summary>
/// Notifies the navigator that a node was resolved.
/// </summary>
/// <param name="node">The node that was resolved</param>
/// <param name="result">Resolve result</param>
void Resolved(AstNode node, ResolveResult result);
/// <summary>
/// Notifies the navigator that a conversion was applied.
/// </summary>
/// <param name="expression">The expression that was resolved.</param>
/// <param name="result">The resolve result of the expression.</param>
/// <param name="conversion">The conversion applied to the expressed.</param>
/// <param name="targetType">The target type of the conversion.</param>
void ProcessConversion(Expression expression, ResolveResult result, Conversion conversion, IType targetType);
}
/// <summary>
/// Represents the operation mode of the resolve visitor.
/// </summary>
/// <seealso cref="ResolveVisitor"/>
public enum ResolveVisitorNavigationMode
{
/// <summary>
/// Scan into the children of the current node, without resolving the current node.
/// </summary>
Scan,
/// <summary>
/// Skip the current node - do not scan into it; do not resolve it.
/// </summary>
Skip,
/// <summary>
/// Resolve the current node.
/// Subnodes which are not required for resolving the current node
/// will ask the navigator again whether they should be resolved.
/// </summary>
Resolve
}
sealed class ConstantModeResolveVisitorNavigator : IResolveVisitorNavigator
{
readonly ResolveVisitorNavigationMode mode;
readonly IResolveVisitorNavigator targetForResolveCalls;
public ConstantModeResolveVisitorNavigator(ResolveVisitorNavigationMode mode, IResolveVisitorNavigator targetForResolveCalls)
{
this.mode = mode;
this.targetForResolveCalls = targetForResolveCalls;
}
ResolveVisitorNavigationMode IResolveVisitorNavigator.Scan(AstNode node)
{
return mode;
}
void IResolveVisitorNavigator.Resolved(AstNode node, ResolveResult result)
{
if (targetForResolveCalls != null)
targetForResolveCalls.Resolved(node, result);
}
void IResolveVisitorNavigator.ProcessConversion(Expression expression, ResolveResult result, Conversion conversion, IType targetType)
{
if (targetForResolveCalls != null)
targetForResolveCalls.ProcessConversion(expression, result, conversion, targetType);
}
}
}
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