Add ability for Function to generate source

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 5429 matching lines @@
     } else {
       tmp = cls.UserVisibleName();
     }
   }
   tmp = String::Concat(tmp, Symbols::Dot());
   const String& suffix = String::Handle(UserVisibleName());
   return String::Concat(tmp, suffix);
 }
 
 
+RawString* Function::GetSource() {
+  const Script& func_script = Script::Handle(script());
+  // Without the + 1 the final "}" is not included.
+  return func_script.GetSnippet(token_pos(), end_token_pos() + 1);
+}
+
+
 // Construct fingerprint from token stream. The token stream contains also
 // arguments.
 int32_t Function::SourceFingerprint() const {
   uint32_t result = String::Handle(Signature()).Hash();
   TokenStream::Iterator tokens_iterator(TokenStream::Handle(
       Script::Handle(script()).tokens()), token_pos());
   Object& obj = Object::Handle();
   String& literal = String::Handle();
   while (tokens_iterator.CurrentPosition() < end_token_pos()) {
     uint32_t val = 0;
@@ skipping 1501 matching lines @@
   if (line_start_idx >= 0) {
     return String::SubString(src,
                              line_start_idx,
                              last_char_idx - line_start_idx + 1);
   } else {
     return Symbols::Empty().raw();
   }
 }
 
 
+RawString* Script::GetSnippet(intptr_t from_token_pos,
+                              intptr_t to_token_pos) const {
+  intptr_t from_line, from_column;
+  intptr_t to_line, to_column;
+  GetTokenLocation(from_token_pos, &from_line, &from_column);
+  GetTokenLocation(to_token_pos, &to_line, &to_column);
+  return GetSnippet(from_line, from_column, to_line, to_column);
+}
+
+
 RawString* Script::GetSnippet(intptr_t from_line,
                               intptr_t from_column,
                               intptr_t to_line,
                               intptr_t to_column) const {
   const String& src = String::Handle(Source());
   intptr_t length = src.Length();
   intptr_t line = 1 + line_offset();
   intptr_t column = 1;
   intptr_t lookahead = 0;
   intptr_t snippet_start = -1;
@@ skipping 8783 matching lines @@
   return "_MirrorReference";
 }
 
 
 void MirrorReference::PrintToJSONStream(JSONStream* stream, bool ref) const {
   JSONObject jsobj(stream);
 }
 
 
 }  // namespace dart