src/Boo.Lang.Compiler/Pipelines/Parse.cs

   1 #region license
   2 // Copyright (c) 2004, 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 namespace Boo.Lang.Compiler.Pipelines
  30 {
  31         using System;
  32         using System.IO;
  33         using System.Reflection;
  34
  35         public class Parse : CompilerPipeline
  36         {
  37                 static Type _defaultParserStepType;
  38
  39                 public static ICompilerStep NewParserStep()
  40                 {
  41                         if (null == _defaultParserStepType)
  42                         {
  43                                 _defaultParserStepType = FindParserAssembly().GetType("Boo.Lang.Parser.BooParsingStep", true);
  44                         }
  45                         return (ICompilerStep)Activator.CreateInstance(_defaultParserStepType);
  46                 }
  47
  48                 static Assembly FindParserAssembly()
  49                 {
  50                         Assembly thisAssembly = typeof(Parse).Assembly;
  51                         string thisLocation = thisAssembly.Location;
  52                         string parserLocation = thisLocation.Substring(0, thisLocation.Length-"Boo.Lang.Compiler.dll".Length) + "Boo.Lang.Parser.dll";
  53                         return File.Exists(parserLocation)
  54                                 ? Assembly.LoadFrom(parserLocation)
  55                                 : Assembly.Load(thisAssembly.FullName.Replace("Boo.Lang.Compiler", "Boo.Lang.Parser"));
  56                 }
  57
  58                 public Parse()
  59                 {
  60                         Add(NewParserStep());
  61                 }
  62         }
  63 }