/// <summary>
///
/// </summary>
/// <param name="stream"></param>
/// <returns></returns>
/// <remarks>
///
/// See http://www.dmtf.org/sites/default/files/standards/documents/DSP0221_3.0.0a.pdf
///
/// A.17.3 String values
///
/// Unless explicitly specified via ABNF rule WS, no whitespace is allowed between the elements of the rules
/// in this ABNF section.
///
/// stringValue = DOUBLEQUOTE *stringChar DOUBLEQUOTE
/// *( *WS DOUBLEQUOTE *stringChar DOUBLEQUOTE )
/// stringChar = stringUCSchar / stringEscapeSequence
///
/// </remarks>
private static StringLiteralToken ReadStringLiteralToken(ILexerStream stream)
{
// BUGBUG - no support for *( *WS DOUBLEQUOTE *stringChar DOUBLEQUOTE )
// BUGBUG - incomplete escape sequences
// BUGBUG - no support for UCS characters
var sourceChars = new List <SourceChar>();
// read the first character
sourceChars.Add(stream.ReadChar('"'));
// read the remaining characters
var parser = new StringLiteralParser();
while (!stream.Eof)
{
var peek = stream.Peek();
if (StringValidator.IsDoubleQuote(peek.Value) && !parser.IsEscaped)
{
parser.ConsumeEos();
break;
}
else
{
sourceChars.Add(peek);
parser.ConsumeChar(stream.Read());
}
}
// read the last character
sourceChars.Add(stream.ReadChar('"'));
// process any escape sequences in the string
var unescaped = parser.OutputString.ToString();
// return the result
var extent = new SourceExtent(sourceChars);
return(new StringLiteralToken(extent, unescaped));
}
public static void IsDoubleQuoteTest(char value, bool expectedResult)
{
var result = StringValidator.IsDoubleQuote(value);
Assert.AreEqual(expectedResult, result);
}
