source: trunk/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Resolver/FindReferencedEntities.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
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// 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
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using System;
using ICSharpCode.NRefactory.Semantics;
using ICSharpCode.NRefactory.TypeSystem;

namespace ICSharpCode.NRefactory.CSharp.Resolver
{
  /// <summary>
  /// Find all entities that are referenced in the scanned AST.
  /// </summary>
  public sealed class FindReferencedEntities : IResolveVisitorNavigator
  {
    readonly Action<AstNode, IMember> memberReferenceFound;
    readonly Action<AstNode, IType> typeReferenceFound;
    
    /// <summary>
    /// Creates a new FindReferencedEntities instance that
    /// looks for entity definitions.
    /// The visitor will report type definitions and member definitions (not specialized members).
    /// </summary>
    public FindReferencedEntities(Action<AstNode, IEntity> referenceFound)
    {
      if (referenceFound == null)
        throw new ArgumentNullException("referenceFound");
      this.memberReferenceFound = (node, member) => referenceFound(node, member.MemberDefinition);
      this.typeReferenceFound = (node, type) => {
        var def = type.GetDefinition();
        if (def != null)
          referenceFound(node, def);
      };
    }
    
    /// <summary>
    /// Creates a new FindReferencedEntities instance that
    /// looks for types and members.
    /// The visitor will report parameterized types and potentially specialized members.
    /// </summary>
    public FindReferencedEntities(Action<AstNode, IType> typeReferenceFound, Action<AstNode, IMember> memberReferenceFound)
    {
      if (typeReferenceFound == null)
        throw new ArgumentNullException("typeReferenceFound");
      if (memberReferenceFound == null)
        throw new ArgumentNullException("memberReferenceFound");
      this.typeReferenceFound = typeReferenceFound;
      this.memberReferenceFound = memberReferenceFound;
    }
    
    public ResolveVisitorNavigationMode Scan(AstNode node)
    {
      return ResolveVisitorNavigationMode.Resolve;
    }
    
    public void Resolved(AstNode node, ResolveResult result)
    {
      if (ParenthesizedExpression.ActsAsParenthesizedExpression(node))
        return;
      
      MemberResolveResult mrr = result as MemberResolveResult;
      if (mrr != null) {
        memberReferenceFound(node, mrr.Member);
      }
      TypeResolveResult trr = result as TypeResolveResult;
      if (trr != null) {
        typeReferenceFound(node, trr.Type);
      }
      ForEachResolveResult ferr = result as ForEachResolveResult;
      if (ferr != null) {
        Resolved(node, ferr.GetEnumeratorCall);
        if (ferr.CurrentProperty != null)
          memberReferenceFound(node, ferr.CurrentProperty);
        if (ferr.MoveNextMethod != null)
          memberReferenceFound(node, ferr.MoveNextMethod);
      }
    }
    
    public void ProcessConversion(Expression expression, ResolveResult result, Conversion conversion, IType targetType)
    {
      if (conversion.IsUserDefined || conversion.IsMethodGroupConversion) {
        memberReferenceFound(expression, conversion.Method);
      }
    }
  }
}