public static IParsingResultExtended Parse(ParsingContext context)
{
IParsingResultExtended simple = SimpleOperatorName.Parse(context);
if (simple != null)
{
return(simple);
}
RewindState rewind = context.RewindState;
if (context.Parser.VerifyString("cv"))
{
IParsingResultExtended type = Type.Parse(context);
if (type == null)
{
context.Rewind(rewind);
return(null);
}
return(new Cast(type));
}
if (context.Parser.VerifyString("li"))
{
IParsingResultExtended name = SourceName.Parse(context);
if (name == null)
{
context.Rewind(rewind);
return(null);
}
return(new Literal(name));
}
if (context.Parser.VerifyString("v"))
{
if (!char.IsDigit(context.Parser.Peek))
{
context.Rewind(rewind);
return(null);
}
int arity = context.Parser.Peek - '0';
context.Parser.Position++;
IParsingResultExtended name = SourceName.Parse(context);
if (name == null)
{
context.Rewind(rewind);
return(null);
}
return(new VendorExtension(arity, name));
}
return(null);
}
public static bool StartsWith(ParsingContext context)
{
char peek = context.Parser.Peek;
return(peek == 'c' || peek == 'l' || peek == 'v' || SimpleOperatorName.StartsWith(context));
}
