src/Boo.Lang/Runtime/GetFieldEmitter.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.Reflection;
  31 using System.Reflection.Emit;
  32 using System.Runtime.CompilerServices;
  33
  34 namespace Boo.Lang.Runtime
  35 {
  36         internal class GetFieldEmitter : DispatcherEmitter
  37         {
  38                 protected readonly FieldInfo _field;
  39
  40                 public GetFieldEmitter(FieldInfo field) : base(field.DeclaringType, field.Name)
  41                 {
  42                         _field = field;
  43                 }
  44
  45                 protected override void EmitMethodBody()
  46                 {
  47                         if (_field.IsStatic)
  48                         {
  49                                 // make sure type is initialized before
  50                                 // accessing any static fields
  51                                 RuntimeHelpers.RunClassConstructor(_field.DeclaringType.TypeHandle);
  52                                 _il.Emit(OpCodes.Ldsfld, _field);
  53                         }
  54                         else
  55                         {
  56                                 EmitLoadTargetObject(_field.DeclaringType);
  57                                 _il.Emit(OpCodes.Ldfld, _field);
  58                         }
  59
  60                         EmitReturn(_field.FieldType);
  61                 }
  62         }
  63 }