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sdk/lib/_internal/compiler/implementation/string_validator.dart

Index: sdk/lib/_internal/compiler/implementation/string_validator.dart
diff --git a/sdk/lib/_internal/compiler/implementation/string_validator.dart b/sdk/lib/_internal/compiler/implementation/string_validator.dart
index b3d234580b7f686ed328430056d6fa9d541e9f94..98ad8fab7730b0e841683b383f80d8401eb2e72f 100644
--- a/sdk/lib/_internal/compiler/implementation/string_validator.dart
+++ b/sdk/lib/_internal/compiler/implementation/string_validator.dart
@@ -81,6 +81,18 @@ class StringValidator {
     return StringQuoting.getQuoting(quoteChar, raw, quoteLength);
   }
 
+  /**
+   * Return the string [string] witout its [initial] first and [terminal] last
+   * characters. This is intended to be used to remove quotes from string
+   * literals (including an initial 'r' for raw strings).
+   */
+  String copyWithoutQuotes(String string, int initial, int terminal) {
+    assert(0 <= initial);
+    assert(0 <= terminal);
+    assert(initial + terminal <= string.length);
+    return string.substring(initial, string.length - terminal);
+  }
+
   void stringParseError(String message, Token token, int offset) {
     listener.cancel("$message @ $offset", token : token);
   }