src/Boo.Lang.Compiler/TypeSystem/GlobalNamespace.cs

   1 #region license
   2 // Copyright (c) 2003, 2004, 2005 Rodrigo B. de Oliveira (rbo@acm.org)
   3 // All rights reserved.
   4 //
   5 // Redistribution and use in source and binary forms, with or without modification,
   6 // are permitted provided that the following conditions are met:
   7 //
   8 //     * Redistributions of source code must retain the above copyright notice,
   9 //     this list of conditions and the following disclaimer.
  10 //     * Redistributions in binary form must reproduce the above copyright notice,
  11 //     this list of conditions and the following disclaimer in the documentation
  12 //     and/or other materials provided with the distribution.
  13 //     * Neither the name of Rodrigo B. de Oliveira nor the names of its
  14 //     contributors may be used to endorse or promote products derived from this
  15 //     software without specific prior written permission.
  16 //
  17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  18 // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
  21 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  23 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  24 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27 #endregion
  28
  29
  30 using System.Collections;
  31
  32 namespace Boo.Lang.Compiler.TypeSystem
  33 {
  34         public class GlobalNamespace : SimpleNamespace
  35         {
  36                 INamespace _empty;
  37
  38                 public GlobalNamespace() : this(new Hashtable())
  39                 {
  40                 }
  41
  42                 public GlobalNamespace(IDictionary children) : base(null, children)
  43                 {
  44                         _empty = (INamespace)children[""];
  45                         if (null == _empty)
  46                         {
  47                                 _empty = NullNamespace.Default;
  48                         }
  49                 }
  50
  51                 override public bool Resolve(List targetList, string name, EntityType flags)
  52                 {
  53                         if (!base.Resolve(targetList, name, flags))
  54                         {
  55                                 return _empty.Resolve(targetList, name, flags);
  56                         }
  57                         return true;
  58                 }
  59
  60                 public INamespace GetChild(string name)
  61                 {
  62                         return (INamespace)_children[name];
  63                 }
  64
  65                 public void SetChild(string name, INamespace entity)
  66                 {
  67                         _children[name] = entity;
  68                         if (name == "")
  69                         {
  70                                 _empty = entity;
  71                         }
  72                 }
  73         }
  74 }