source: tags/3.3.11/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Resolver/NodeListResolveVisitorNavigator.cs @ 15261

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// 
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// 
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using System;
using System.Collections.Generic;
using ICSharpCode.NRefactory.Semantics;
using ICSharpCode.NRefactory.TypeSystem;

namespace ICSharpCode.NRefactory.CSharp.Resolver
{
  /// <summary>
  /// <see cref="IResolveVisitorNavigator"/> implementation that resolves a list of nodes.
  /// We will skip all nodes which are not the target nodes or ancestors of the target nodes.
  /// </summary>
  public class NodeListResolveVisitorNavigator : IResolveVisitorNavigator
  {
    readonly Dictionary<AstNode, ResolveVisitorNavigationMode> dict = new Dictionary<AstNode, ResolveVisitorNavigationMode>();
    
    /// <summary>
    /// Creates a new NodeListResolveVisitorNavigator that resolves the specified nodes.
    /// </summary>
    public NodeListResolveVisitorNavigator(params AstNode[] nodes)
      : this((IEnumerable<AstNode>)nodes)
    {
    }
    
    /// <summary>
    /// Creates a new NodeListResolveVisitorNavigator that resolves the specified nodes.
    /// </summary>
    public NodeListResolveVisitorNavigator(IEnumerable<AstNode> nodes, bool scanOnly = false)
    {
      if (nodes == null)
        throw new ArgumentNullException("nodes");
      foreach (var node in nodes) {
        dict[node] = scanOnly ? ResolveVisitorNavigationMode.Scan : ResolveVisitorNavigationMode.Resolve;
        for (var ancestor = node.Parent; ancestor != null && !dict.ContainsKey(ancestor); ancestor = ancestor.Parent) {
          dict.Add(ancestor, ResolveVisitorNavigationMode.Scan);
        }
      }
    }
    
    /// <inheritdoc/>
    public virtual ResolveVisitorNavigationMode Scan(AstNode node)
    {
      ResolveVisitorNavigationMode mode;
      if (dict.TryGetValue(node, out mode)) {
        return mode;
      } else {
        return ResolveVisitorNavigationMode.Skip;
      }
    }
    
    public virtual void Resolved(AstNode node, ResolveResult result)
    {
    }
    
    public virtual void ProcessConversion(Expression expression, ResolveResult result, Conversion conversion, IType targetType)
    {
    }
  }
}