source: trunk/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Resolver/CompositeResolveVisitorNavigator.cs

// 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
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// DEALINGS IN THE SOFTWARE.

using System;
using ICSharpCode.NRefactory.Semantics;
using ICSharpCode.NRefactory.TypeSystem;

namespace ICSharpCode.NRefactory.CSharp.Resolver
{
  public sealed class CompositeResolveVisitorNavigator : IResolveVisitorNavigator
  {
    IResolveVisitorNavigator[] navigators;
    
    public CompositeResolveVisitorNavigator(params IResolveVisitorNavigator[] navigators)
    {
      if (navigators == null)
        throw new ArgumentNullException("navigators");
      this.navigators = navigators;
      foreach (var n in navigators) {
        if (n == null)
          throw new ArgumentException("Array must not contain nulls.");
      }
    }
    
    public ResolveVisitorNavigationMode Scan(AstNode node)
    {
      bool needsScan = false;
      foreach (var navigator in navigators) {
        ResolveVisitorNavigationMode mode = navigator.Scan(node);
        if (mode == ResolveVisitorNavigationMode.Resolve)
          return mode; // resolve has highest priority
        else if (mode == ResolveVisitorNavigationMode.Scan)
          needsScan = true;
      }
      return needsScan ? ResolveVisitorNavigationMode.Scan : ResolveVisitorNavigationMode.Skip;
    }
    
    public void Resolved(AstNode node, ResolveResult result)
    {
      foreach (var navigator in navigators) {
        navigator.Resolved(node, result);
      }
    }
    
    public void ProcessConversion(Expression expression, ResolveResult result, Conversion conversion, IType targetType)
    {
      foreach (var navigator in navigators) {
        navigator.ProcessConversion(expression, result, conversion, targetType);
      }
    }
  }
}