Remove legacy syntax support for library import

runtime/vm/scanner.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/scanner.h"
 
 #include "platform/assert.h"
 #include "vm/flags.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
@@ skipping 394 matching lines @@
 }
 
 
 void Scanner::SkipLine() {
   while (c0_ != '\n' && c0_ != '\0') {
     ReadChar();
   }
 }
 
 
-void Scanner::ScanLibraryTag() {
+void Scanner::ScanScriptTag() {
   ReadChar();
   if (c0_ == '!') {
     Recognize(Token::kSCRIPTTAG);
     // The script tag extends to the end of the line. Just treat this
     // similar to a line comment.
     SkipLine();
     return;
-  }
-  if (!IsLetter(c0_)) {
-    ErrorMsg("Unrecognized library tag");
+  } else {
+    ErrorMsg("unexpected character: '#'");
     SkipLine();
     return;
   }
-  const String& ident = String::Handle(ConsumeIdentChars(false));
-  if (ident.Equals(Symbols::Library())) {
-    current_token_.kind = Token::kLEGACY_LIBRARY;
-    return;
-  }
-  if (ident.Equals(Symbols::Import())) {
-    current_token_.kind = Token::kLEGACY_IMPORT;
-    return;
-  }
-  if (ident.Equals(Symbols::Source())) {
-    current_token_.kind = Token::kLEGACY_SOURCE;
-    return;
-  }
-  ErrorMsg("Unrecognized library token");
-  SkipLine();
 }
 
 
 void Scanner::ScanLiteralString(bool is_raw) {
   ASSERT(!IsScanningString());
   ASSERT(c0_ == '"' || c0_ == '\'');
 
   // Entering string scanning mode.
   BeginStringLiteral(c0_);
   string_is_multiline_ = (LookaheadChar(1) == c0_) &&
@@ skipping 409 matching lines @@
           ScanIdent();
         }
         break;
 
       case '"':
       case '\'':
         ScanLiteralString(false);
         break;
 
       case '#':
-        ScanLibraryTag();
+        ScanScriptTag();
         break;
 
       default:
         if (IsIdentStartChar(c0_)) {
           ScanIdent();
         } else if (IsDecimalDigit(c0_)) {
           ScanNumber(false);
         } else {
           char msg[128];
           char utf8_char[5];
@@ skipping 99 matching lines @@
               "%c%#"Px"", kPrivateKeySeparator, key_value);
   const String& result = String::Handle(String::New(private_key, Heap::kOld));
   return result.raw();
 }
 
 
 void Scanner::InitOnce() {
 }
 
 }  // namespace dart