mcs/class/Microsoft.JScript/Microsoft.JScript/Throw.cs

   1 //
   2 // Throw.cs:
   3 //
   4 // Author: Cesar Octavio Lopez Nataren
   5 //
   6 // (C) 2003, 2004, Cesar Octavio Lopez Nataren, <cesar@ciencias.unam.mx>
   7 //
   8
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System;
  31 using System.Reflection.Emit;
  32
  33 namespace Microsoft.JScript {
  34
  35         public class Throw : AST {
  36
  37                 internal AST expression;
  38
  39                 internal Throw (AST exp, int line_number)
  40                 {
  41                         expression = exp;
  42                         this.line_number = line_number;
  43                 }
  44
  45                 public static Exception JScriptThrow (object value)
  46                 {
  47                         throw new NotImplementedException ();
  48                 }
  49
  50                 public override string ToString ()
  51                 {
  52                         return expression.ToString ();
  53                 }
  54
  55                 internal override bool Resolve (IdentificationTable context)
  56                 {
  57                         return expression.Resolve (context);
  58                 }
  59
  60                 internal override void Emit (EmitContext ec)
  61                 {
  62                         ILGenerator ig = ec.ig;
  63                         expression.Emit (ec);
  64                         ig.Emit (OpCodes.Call, typeof (Throw).GetMethod ("JScriptThrow"));
  65                         ig.Emit (OpCodes.Throw);
  66                 }
  67         }
  68 }