mcs/mcs/tree.cs

   1 //
   2 // tree.cs: keeps a tree representation of the generated code
   3 //
   4 // Author: Miguel de Icaza (miguel@gnu.org)
   5 //
   6 // Licensed under the terms of the GNU GPL
   7 //
   8 // (C) 2001 Ximian, Inc (http://www.ximian.com)
   9 //
  10 //
  11
  12 using System;
  13 using System.Collections;
  14 using System.Reflection;
  15 using System.Reflection.Emit;
  16 using System.IO;
  17
  18 namespace Mono.CSharp
  19 {
  20
  21         public interface ITreeDump {
  22                 int  Dump (Tree tree, StreamWriter output);
  23                 void ParseOptions (string options);
  24         }
  25
  26         // <summary>
  27         //
  28         //   We store here all the toplevel types that we have parsed,
  29         //   this is the root of all information we have parsed.
  30         //
  31         // </summary>
  32
  33         public class Tree {
  34                 TypeContainer root_types;
  35
  36                 // <summary>
  37                 //  Keeps track of namespaces defined in the source code
  38                 // </summary>
  39                 Hashtable namespaces;
  40
  41                 // <summary>
  42                 //   Keeps track of all the types definied (classes, structs, ifaces, enums)
  43                 // </summary>
  44                 Hashtable decls;
  45
  46                 public Tree ()
  47                 {
  48                         root_types = new TypeContainer (null, null, "", new Location (-1));
  49
  50                         decls = new Hashtable ();
  51                         namespaces = new Hashtable ();
  52                 }
  53
  54                 DoubleHash decl_ns_name = new DoubleHash ();
  55
  56                 public void RecordDecl (string name, DeclSpace ds)
  57                 {
  58                         if (decls.Contains (name)){
  59                                 Report.Error (
  60                                         101, ds.Location,
  61                                         "There is already a definition for `" + name + "'");
  62                                 DeclSpace other = (DeclSpace) decls [name];
  63                                 Report.Error (0,
  64                                         other.Location, "(Location of symbol related to previous error)");
  65                                 return;
  66                         }
  67
  68                         ds.RecordDecl ();
  69
  70                         int p = name.LastIndexOf ('.');
  71                         if (p == -1)
  72                                 decl_ns_name.Insert ("", name, ds);
  73                         else {
  74                                 decl_ns_name.Insert (name.Substring (0, p), name.Substring (p+1), ds);
  75                         }
  76
  77                         decls.Add (name, ds);
  78                 }
  79
  80                 public DeclSpace LookupByNamespace (string ns, string name)
  81                 {
  82                         object res;
  83
  84                         decl_ns_name.Lookup (ns, name, out res);
  85                         return (DeclSpace) res;
  86                 }
  87
  88                 public NamespaceEntry RecordNamespace (NamespaceEntry parent, SourceFile file, string name, Location loc)
  89                 {
  90                         NamespaceEntry ns = new NamespaceEntry (parent, file, name, loc);
  91
  92                         if (namespaces.Contains (file)){
  93                                 Hashtable ns_ns = (Hashtable) namespaces [file];
  94
  95                                 if (ns_ns.Contains (ns.FullName))
  96                                         return (NamespaceEntry) ns_ns [ns.FullName];
  97                                 ns_ns.Add (ns.FullName, ns);
  98                         } else {
  99                                 Hashtable new_table = new Hashtable ();
 100                                 namespaces [file] = new_table;
 101
 102                                 new_table.Add (ns.FullName, ns);
 103                         }
 104
 105                         return ns;
 106                 }
 107
 108                 //
 109                 // FIXME: Why are we using Types?
 110                 //
 111                 public TypeContainer Types {
 112                         get {
 113                                 return root_types;
 114                         }
 115                 }
 116
 117                 public Hashtable Decls {
 118                         get {
 119                                 return decls;
 120                         }
 121                 }
 122
 123                 public Hashtable Namespaces {
 124                         get {
 125                                 return namespaces;
 126                         }
 127                 }
 128         }
 129 }