Allow surrogates in string literals.

runtime/vm/scanner_test.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 "platform/assert.h"
 #include "vm/os.h"
 #include "vm/scanner.h"
 #include "vm/token.h"
 #include "vm/unit_test.h"
 
@@ skipping 174 matching lines @@
   EXPECT_EQ(' ', litchars[1]);
   EXPECT_EQ('\\', litchars[2]);
   EXPECT_EQ('\n', litchars[4]);
   EXPECT_EQ('\r', litchars[5]);
   EXPECT_EQ('\t', litchars[6]);
   EXPECT_EQ('\'', litchars[8]);
 }
 
 
 static void InvalidStringEscapes() {
-  const GrowableTokenStream& high_start_4 =
-      Scan("\"\\uD800\"");
-  EXPECT_EQ(2, high_start_4.length());
-  CheckKind(high_start_4, 0, Token::kERROR);
-  EXPECT(high_start_4[0].literal->Equals("invalid code point"));
-  CheckKind(high_start_4, 1, Token::kEOS);
-
-  const GrowableTokenStream& high_start_seq =
-      Scan("\"\\u{D800}\"");
-  EXPECT_EQ(2, high_start_seq.length());
-  CheckKind(high_start_seq, 0, Token::kERROR);
-  EXPECT(high_start_seq[0].literal->Equals("invalid code point"));
-  CheckKind(high_start_seq, 1, Token::kEOS);
-
-  const GrowableTokenStream& high_end_4 =
-      Scan("\"\\uDBFF\"");
-  EXPECT_EQ(2, high_end_4.length());
-  CheckKind(high_end_4, 0, Token::kERROR);
-  EXPECT(high_end_4[0].literal->Equals("invalid code point"));
-  CheckKind(high_end_4, 1, Token::kEOS);
-
-  const GrowableTokenStream& high_end_seq =
-      Scan("\"\\u{DBFF}\"");
-  EXPECT_EQ(2, high_end_seq.length());
-  CheckKind(high_end_seq, 0, Token::kERROR);
-  EXPECT(high_end_seq[0].literal->Equals("invalid code point"));
-  CheckKind(high_end_seq, 1, Token::kEOS);
-
-  const GrowableTokenStream& low_start_4 =
-      Scan("\"\\uDC00\"");
-  EXPECT_EQ(2, low_start_4.length());
-  CheckKind(low_start_4, 0, Token::kERROR);
-  EXPECT(low_start_4[0].literal->Equals("invalid code point"));
-  CheckKind(low_start_4, 1, Token::kEOS);
-
-  const GrowableTokenStream& low_start_seq =
-      Scan("\"\\u{DC00}\"");
-  EXPECT_EQ(2, low_start_seq.length());
-  CheckKind(low_start_seq, 0, Token::kERROR);
-  EXPECT(low_start_seq[0].literal->Equals("invalid code point"));
-  CheckKind(low_start_seq, 1, Token::kEOS);
-
-  const GrowableTokenStream& low_end_4 =
-      Scan("\"\\uDFFF\"");
-  EXPECT_EQ(2, low_end_4.length());
-  CheckKind(low_end_4, 0, Token::kERROR);
-  EXPECT(low_end_4[0].literal->Equals("invalid code point"));
-  CheckKind(low_end_4, 1, Token::kEOS);
-
-  const GrowableTokenStream& low_end_seq =
-      Scan("\"\\u{DFFF}\"");
-  EXPECT_EQ(2, low_end_seq.length());
-  CheckKind(low_end_seq, 0, Token::kERROR);
-  EXPECT(low_end_seq[0].literal->Equals("invalid code point"));
-  CheckKind(low_end_seq, 1, Token::kEOS);
-
   const GrowableTokenStream& out_of_range_low =
       Scan("\"\\u{110000}\"");
   EXPECT_EQ(2, out_of_range_low.length());
   CheckKind(out_of_range_low, 0, Token::kERROR);
   EXPECT(out_of_range_low[0].literal->Equals("invalid code point"));
   CheckKind(out_of_range_low, 1, Token::kEOS);
 
   const GrowableTokenStream& out_of_range_high =
       Scan("\"\\u{FFFFFF}\"");
   EXPECT_EQ(2, out_of_range_high.length());
@@ skipping 213 matching lines @@
   RawString();
   MultilineString();
   EmptyString();
   EmptyMultilineString();
   NumberLiteral();
   InvalidText();
   NewlinesTest();
 }
 
 }  // namespace dart