MonoRail/Castle.MonoRail.Views.Brail/Macros/CodeBuilderHelper.cs

   1 // Copyright 2004-2007 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.MonoRail.Views.Brail
  16 {
  17     using System.IO;
  18     using Boo.Lang.Compiler.Ast;
  19     using Boo.Lang.Compiler.TypeSystem;
  20
  21     public class CodeBuilderHelper
  22     {
  23         public static Expression CreateCallableFromMacroBody(BooCodeBuilder builder, MacroStatement macro)
  24         {
  25             // create closure for macro's body or null
  26             Expression macroBody = new NullLiteralExpression();
  27             if (macro.Block.Statements.Count > 0)
  28             {
  29                 BlockExpression callableExpr = new BlockExpression();
  30                 callableExpr.Body = macro.Block;
  31                 callableExpr.Parameters.Add(
  32                     new ParameterDeclaration("OutputStream",
  33                     builder.CreateTypeReference(typeof(TextWriter))));
  34
  35                 macroBody = callableExpr;
  36             }
  37             return macroBody;
  38         }
  39     }
  40 }