mcs/class/Microsoft.JScript/Microsoft.JScript/ArrayLiteral.cs

   1 //
   2 // ArrayLiteral.cs:
   3 //
   4 // Author:
   5 //      Cesar Octavio Lopez Nataren
   6 //
   7 // (C) 2003, Cesar Octavio Lopez Nataren, <cesar@ciencias.unam.mx>
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32 using System.Collections;
  33 using System.Reflection;
  34 using System.Reflection.Emit;
  35
  36 namespace Microsoft.JScript {
  37
  38         public class ArrayLiteral : AST {
  39
  40                 internal ASTList elems;
  41                 int skip_count;
  42
  43                 public ArrayLiteral (Context context, ASTList elems, int skip_count)
  44                 {
  45                         this.elems = elems;
  46                         this.skip_count = skip_count;
  47                 }
  48
  49                 internal ArrayLiteral (AST parent)
  50                 {
  51                         this.parent = parent;
  52                         elems = new ASTList ();
  53                 }
  54
  55                 internal override bool Resolve (IdentificationTable context)
  56                 {
  57                          bool r = true;
  58                          foreach (AST ast in elems.elems)
  59                                  if (ast != null)
  60                                          r &= ast.Resolve (context);
  61                         return r;
  62                 }
  63
  64                 internal override void Emit (EmitContext ec)
  65                 {
  66                         int i = 0;
  67                         ILGenerator ig = ec.ig;
  68                         ArrayList exps = elems.elems;
  69                         FieldInfo missing = null;
  70                         if (skip_count != 0)
  71                                 missing = typeof (Missing).GetField ("Value");
  72                         ig.Emit (OpCodes.Ldc_I4, elems.Size);
  73                         ig.Emit (OpCodes.Newarr, typeof (object));
  74                         foreach (AST ast in exps) {
  75                                 ig.Emit (OpCodes.Dup);
  76                                 ig.Emit (OpCodes.Ldc_I4, i);
  77                                 if (ast != null)
  78                                         ast.Emit (ec);
  79                                 else
  80                                         ig.Emit (OpCodes.Ldsfld, missing);
  81                                 ig.Emit (OpCodes.Stelem_Ref);
  82                                 i++;
  83                         }
  84                         ig.Emit (OpCodes.Call, typeof (Globals).GetMethod ("ConstructArrayLiteral"));
  85                 }
  86         }
  87 }