private static IToken Resolve(LexerContext context)
{
if (CommentToken.IsCommentBegin(context))
{
return(ResolveComment(context));
}
else if (NumberToken.IsNumberBegin(context))
{
return(ResolveNumber(context));
}
else if (StringToken.IsStringBegin(context))
{
return(ResolveString(context));
}
else if (SpecialSymbolToken.IsSpecial(context))
{
return(ResolveSpecial(context));
}
else if (IdentifierToken.IsIdentifierBegin(context))
{
return(ResolveIdentifier(context));
}
else
{
throw new SyntaxErrorException();
}
}
private static SpecialSymbolToken ResolveSpecial(LexerContext context)
{
var begin = context.GetIndex();
if (!context.IsLast() && SpecialSymbolToken.IsSpecialPair(context))
{
var pair = context.GetCharPair();
context.IncIndex();
context.IncIndex();
return(new SpecialSymbolToken(pair, begin));
}
else
{
var ch = context.GetCurrentChar();
context.IncIndex();
return(new SpecialSymbolToken(ch, begin));
}
}
