mcs/mbas/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.MonoBASIC
  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, 0));
  49
  50                         decls = new Hashtable ();
  51                         namespaces = new Hashtable ();
  52                 }
  53
  54                 public void RecordDecl (string name, DeclSpace ds)
  55                 {
  56                         if (decls.Contains (name)){
  57                                 Report.Error (
  58                                         30179, ds.Location,
  59                                         "There is already a definition for `" + name + "'");
  60                                 DeclSpace other = (DeclSpace) decls [name];
  61                                 Report.Error (0,
  62                                         other.Location, "(Location of symbol related to previous error)");
  63                                 return;
  64                         }
  65                         decls.Add (name, ds);
  66                 }
  67
  68                 public Namespace RecordNamespace (Namespace parent, string file, string name)
  69                 {
  70                         Namespace ns = new Namespace (parent, name);
  71
  72                         if (namespaces.Contains (file)){
  73                                 Hashtable ns_ns = (Hashtable) namespaces [file];
  74
  75                                 if (ns_ns.Contains (ns.Name))
  76                                         return (Namespace) ns_ns [ns.Name];
  77                                 ns_ns.Add (ns.Name, ns);
  78                         } else {
  79                                 Hashtable new_table = new Hashtable ();
  80                                 namespaces [file] = new_table;
  81
  82                                 new_table.Add (ns.Name, ns);
  83                         }
  84
  85                         return ns;
  86                 }
  87
  88                 //
  89                 // FIXME: Why are we using Types?
  90                 //
  91                 public TypeContainer Types {
  92                         get {
  93                                 return root_types;
  94                         }
  95                 }
  96
  97                 public Hashtable Decls {
  98                         get {
  99                                 return decls;
 100                         }
 101                 }
 102
 103                 public Hashtable Namespaces {
 104                         get {
 105                                 return namespaces;
 106                         }
 107                 }
 108         }
 109 }