mcs/ilasm/codegen/GenericParameters.cs

   1 //
   2 // Mono.ILASM.GenericParameters
   3 //
   4 // Author(s):
   5 //  Ankit Jain  <jankit@novell.com>
   6 //
   7 // Copyright 2006 Novell, Inc (http://www.novell.com)
   8 //
   9
  10 using System;
  11 using System.Collections;
  12 using System.Text;
  13
  14 namespace Mono.ILASM {
  15
  16         public class GenericParameter : ICustomAttrTarget {
  17                 string id;
  18                 int num;
  19                 PEAPI.GenericParamAttributes attr;
  20                 ArrayList constraintsList;
  21                 ArrayList customattrList;
  22
  23                 public GenericParameter (string id)
  24                         : this (id, 0, null)
  25                 {
  26                 }
  27
  28                 public GenericParameter (string id, PEAPI.GenericParamAttributes attr, ArrayList constraints)
  29                 {
  30                         this.id = id;
  31                         this.attr = attr;
  32                         num = -1;
  33                         constraintsList = null;
  34                         customattrList = null;
  35
  36                         if (constraints != null)
  37                                 foreach (BaseTypeRef typeref in constraints)
  38                                         AddConstraint (typeref);
  39                 }
  40
  41                 public string Id {
  42                         get { return id; }
  43                 }
  44
  45                 public int Num {
  46                         get { return num; }
  47                         set { num = value; }
  48                 }
  49
  50                 public void AddConstraint (BaseTypeRef constraint)
  51                 {
  52                         if (constraint == null)
  53                                 throw new InternalErrorException ();
  54
  55                         if (constraintsList == null)
  56                                 constraintsList = new ArrayList ();
  57
  58                         constraintsList.Add (constraint);
  59                 }
  60
  61                 public override string ToString ()
  62                 {
  63                         return Id;
  64                 }
  65
  66                 public void AddCustomAttribute (CustomAttr customattr)
  67                 {
  68                         if (customattrList == null)
  69                                 customattrList = new ArrayList ();
  70
  71                         customattrList.Add (customattr);
  72                 }
  73
  74                 public void Resolve (CodeGen code_gen, PEAPI.MethodDef methoddef)
  75                 {
  76                         PEAPI.GenericParameter gp = methoddef.AddGenericParameter ((short) num, id, attr);
  77                         Resolve (code_gen, gp);
  78                 }
  79
  80                 public void Resolve (CodeGen code_gen, PEAPI.ClassDef classdef)
  81                 {
  82                         PEAPI.GenericParameter gp = classdef.AddGenericParameter ((short) num, id, attr);
  83                         Resolve (code_gen, gp);
  84                 }
  85
  86                 private void Resolve (CodeGen code_gen, PEAPI.GenericParameter gp)
  87                 {
  88                         ResolveConstraints (code_gen, gp);
  89                         if (customattrList == null)
  90                                 return;
  91
  92                         foreach (CustomAttr customattr in customattrList)
  93                                 customattr.AddTo (code_gen, gp);
  94                 }
  95
  96                 public void ResolveConstraints (GenericParameters type_gen_params, GenericParameters method_gen_params)
  97                 {
  98                         if (constraintsList == null)
  99                                 return;
 100
 101                         foreach (BaseTypeRef constraint in constraintsList) {
 102                                 BaseGenericTypeRef gtr = constraint as BaseGenericTypeRef;
 103                                 if (gtr != null)
 104                                         gtr.Resolve (type_gen_params, method_gen_params);
 105                         }
 106                 }
 107
 108                 private void ResolveConstraints (CodeGen code_gen, PEAPI.GenericParameter gp)
 109                 {
 110                         if (constraintsList == null)
 111                                 return;
 112
 113                         foreach (BaseTypeRef constraint in constraintsList) {
 114                                 constraint.Resolve (code_gen);
 115                                 gp.AddConstraint (constraint.PeapiType);
 116                         }
 117                 }
 118
 119         }
 120
 121         public class GenericParameters {
 122                 ArrayList param_list;
 123                 string param_str;
 124
 125                 public GenericParameters ()
 126                 {
 127                         param_list = null;
 128                         param_str = null;
 129                 }
 130
 131                 public int Count {
 132                         get { return (param_list == null ? 0 : param_list.Count); }
 133                 }
 134
 135                 public GenericParameter this [int index] {
 136                         get { return (param_list != null ? (GenericParameter) param_list [index] : null); }
 137                         set { Add (value); }
 138                 }
 139
 140                 public void Add (GenericParameter gen_param)
 141                 {
 142                         if (gen_param == null)
 143                                 throw new InternalErrorException ();
 144
 145                         if (param_list == null)
 146                                 param_list = new ArrayList ();
 147                         gen_param.Num = param_list.Count;
 148                         param_list.Add (gen_param);
 149                         param_str = null;
 150                 }
 151
 152                 public GenericParameter GetGenericParam (string id)
 153                 {
 154                         if (param_list == null)
 155                                 Report.Error ("Invalid type parameter '" + id + "'");
 156
 157                         foreach (GenericParameter param in param_list)
 158                                 if (param.Id == id)
 159                                         return param;
 160                         return null;
 161                 }
 162
 163                 public int GetGenericParamNum (string id)
 164                 {
 165                         GenericParameter param = GetGenericParam (id);
 166                         if (param != null)
 167                                 return param.Num;
 168
 169                         return -1;
 170                 }
 171
 172                 public void Resolve (CodeGen code_gen, PEAPI.ClassDef classdef)
 173                 {
 174                         foreach (GenericParameter param in param_list)
 175                                 param.Resolve (code_gen, classdef);
 176                 }
 177
 178                 public void Resolve (CodeGen code_gen, PEAPI.MethodDef methoddef)
 179                 {
 180                         foreach (GenericParameter param in param_list)
 181                                 param.Resolve (code_gen, methoddef);
 182                 }
 183
 184                 public void ResolveConstraints (GenericParameters type_gen_params, GenericParameters method_gen_params)
 185                 {
 186                         foreach (GenericParameter param in param_list)
 187                                 param.ResolveConstraints (type_gen_params, method_gen_params);
 188                         param_str = null;
 189                 }
 190
 191                 private void MakeString ()
 192                 {
 193                         //Build full_name (foo < , >)
 194                         StringBuilder sb = new StringBuilder ();
 195                         sb.Append ("<");
 196                         foreach (GenericParameter param in param_list)
 197                                 sb.AppendFormat ("{0}, ", param);
 198                         //Remove the extra ', ' at the end
 199                         sb.Length -= 2;
 200                         sb.Append (">");
 201                         param_str = sb.ToString ();
 202                 }
 203
 204                 public override string ToString ()
 205                 {
 206                         if (param_str == null)
 207                                 MakeString ();
 208                         return param_str;
 209                 }
 210         }
 211
 212 }