source: branches/CodeEditor/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory-5.5.0/TypeSystem/Implementation/DefaultParameter.cs @ 11700

// 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 System.Collections.Generic;
using System.Text;

namespace ICSharpCode.NRefactory.TypeSystem.Implementation
{
  /// <summary>
  /// Default implementation of <see cref="IParameter"/>.
  /// </summary>
  public sealed class DefaultParameter : IParameter
  {
    readonly IType type;
    readonly string name;
    readonly DomRegion region;
    readonly IList<IAttribute> attributes;
    readonly bool isRef, isOut, isParams, isOptional;
    readonly object defaultValue;
    readonly IParameterizedMember owner;
    
    public DefaultParameter(IType type, string name)
    {
      if (type == null)
        throw new ArgumentNullException("type");
      if (name == null)
        throw new ArgumentNullException("name");
      this.type = type;
      this.name = name;
    }
    
    public DefaultParameter(IType type, string name, IParameterizedMember owner = null, DomRegion region = default(DomRegion), IList<IAttribute> attributes = null,
                            bool isRef = false, bool isOut = false, bool isParams = false, bool isOptional = false, object defaultValue = null)
    {
      if (type == null)
        throw new ArgumentNullException("type");
      if (name == null)
        throw new ArgumentNullException("name");
      this.type = type;
      this.name = name;
      this.owner = owner;
      this.region = region;
      this.attributes = attributes;
      this.isRef = isRef;
      this.isOut = isOut;
      this.isParams = isParams;
      this.isOptional = isOptional;
      this.defaultValue = defaultValue;
    }
    
    SymbolKind ISymbol.SymbolKind {
      get { return SymbolKind.Parameter; }
    }
    
    public IParameterizedMember Owner {
      get { return owner; }
    }
    
    public IList<IAttribute> Attributes {
      get { return attributes; }
    }
    
    public bool IsRef {
      get { return isRef; }
    }
    
    public bool IsOut {
      get { return isOut; }
    }
    
    public bool IsParams {
      get { return isParams; }
    }
    
    public bool IsOptional {
      get { return isOptional; }
    }
    
    public string Name {
      get { return name; }
    }
    
    public DomRegion Region {
      get { return region; }
    }
    
    public IType Type {
      get { return type; }
    }
    
    bool IVariable.IsConst {
      get { return false; }
    }
    
    public object ConstantValue {
      get { return defaultValue; }
    }
    
    public override string ToString()
    {
      return ToString(this);
    }
    
    public static string ToString(IParameter parameter)
    {
      StringBuilder b = new StringBuilder();
      if (parameter.IsRef)
        b.Append("ref ");
      if (parameter.IsOut)
        b.Append("out ");
      if (parameter.IsParams)
        b.Append("params ");
      b.Append(parameter.Name);
      b.Append(':');
      b.Append(parameter.Type.ReflectionName);
      if (parameter.IsOptional) {
        b.Append(" = ");
        if (parameter.ConstantValue != null)
          b.Append(parameter.ConstantValue.ToString());
        else
          b.Append("null");
      }
      return b.ToString();
    }

    public ISymbolReference ToReference()
    {
      if (owner == null)
        return new ParameterReference(type.ToTypeReference(), name, region, isRef, isOut, isParams, isOptional, defaultValue);
      return new OwnedParameterReference(owner.ToReference(), owner.Parameters.IndexOf(this));
    }
  }
  
  sealed class OwnedParameterReference : ISymbolReference
  {
    readonly IMemberReference memberReference;
    readonly int index;
    
    public OwnedParameterReference(IMemberReference member, int index)
    {
      if (member == null)
        throw new ArgumentNullException("member");
      this.memberReference = member;
      this.index = index;
    }
    
    public ISymbol Resolve(ITypeResolveContext context)
    {
      IParameterizedMember member = memberReference.Resolve(context) as IParameterizedMember;
      if (member != null && index >= 0 && index < member.Parameters.Count)
        return member.Parameters[index];
      else
        return null;
    }
  }
  
  public sealed class ParameterReference : ISymbolReference
  {
    readonly ITypeReference type;
    readonly string name;
    readonly DomRegion region;
    readonly bool isRef, isOut, isParams, isOptional;
    readonly object defaultValue;
    
    public ParameterReference(ITypeReference type, string name, DomRegion region, bool isRef, bool isOut, bool isParams, bool isOptional, object defaultValue)
    {
      if (type == null)
        throw new ArgumentNullException("type");
      if (name == null)
        throw new ArgumentNullException("name");
      this.type = type;
      this.name = name;
      this.region = region;
      this.isRef = isRef;
      this.isOut = isOut;
      this.isParams = isParams;
      this.isOptional = isOptional;
      this.defaultValue = defaultValue;
    }

    public ISymbol Resolve(ITypeResolveContext context)
    {
      return new DefaultParameter(type.Resolve(context), name, region: region, isRef: isRef, isOut: isOut, isParams: isParams, isOptional: isOptional, defaultValue: defaultValue);
    }
  }
}