public static string ExpectIdentifier(this ParserContext context, string unexpectedErrorMessageFormat, bool allowPrecedingWhiteSpace, SourceLocation?errorLocation)
{
using (context.StartTemporaryBuffer()) {
if (allowPrecedingWhiteSpace)
{
context.AcceptWhiteSpace(includeNewLines: true);
}
if (!ParserHelpers.IsIdentifierStart(context.CurrentCharacter))
{
if (context.EndOfFile)
{
context.OnError(errorLocation ?? context.CurrentLocation, unexpectedErrorMessageFormat, RazorResources.ErrorComponent_EndOfFile);
}
else if (Char.IsWhiteSpace(context.CurrentCharacter))
{
context.OnError(errorLocation ?? context.CurrentLocation, unexpectedErrorMessageFormat, RazorResources.ErrorComponent_Whitespace);
}
else
{
context.OnError(errorLocation ?? context.CurrentLocation,
unexpectedErrorMessageFormat,
String.Format(CultureInfo.CurrentCulture,
RazorResources.ErrorComponent_Character,
context.CurrentCharacter));
}
return(null);
}
else
{
context.AcceptTemporaryBuffer();
}
}
return(context.AcceptIdentifier());
}
public static bool Accept(this ParserContext context, string expected, bool caseSensitive, out SourceLocation?errorLocation, out char?errorChar)
{
errorLocation = null;
errorChar = null;
using (context.StartTemporaryBuffer()) {
for (int i = 0; i < expected.Length; i++)
{
if (CharsEqual(expected[i], context.CurrentCharacter, caseSensitive))
{
context.AcceptCurrent();
}
else
{
errorLocation = context.CurrentLocation;
errorChar = context.CurrentCharacter;
context.RejectTemporaryBuffer();
return(false);
}
}
context.AcceptTemporaryBuffer();
}
return(true);
}
