/// <returns>
/// type of
/// <see cref="Tup.Cobar4Net.Parser.Ast.Expression.Primary.Wildcard" />
/// is possible. never null
/// </returns>
/// <exception cref="System.SqlSyntaxErrorException">
/// if identifier dose not matched
/// </exception>
protected internal virtual Identifier Identifier()
{
if (lexer.Token() == MySqlToken.None)
{
lexer.NextToken();
}
Identifier id;
switch (lexer.Token())
{
case MySqlToken.OpAsterisk:
{
lexer.NextToken();
var wc = new Wildcard(null);
wc.SetCacheEvalRst(cacheEvalRst);
return(wc);
}
case MySqlToken.Identifier:
{
id = new Identifier(null, lexer.GetStringValue(), lexer.GetStringValueUppercase());
id.SetCacheEvalRst(cacheEvalRst);
lexer.NextToken();
break;
}
default:
{
throw Err("expect id or * after '.'");
}
}
for (; lexer.Token() == MySqlToken.PuncDot;)
{
switch (lexer.NextToken())
{
case MySqlToken.OpAsterisk:
{
lexer.NextToken();
var wc_1 = new Wildcard(id);
wc_1.SetCacheEvalRst(cacheEvalRst);
return(wc_1);
}
case MySqlToken.Identifier:
{
id = new Identifier(id, lexer.GetStringValue(), lexer.GetStringValueUppercase());
id.SetCacheEvalRst(cacheEvalRst);
lexer.NextToken();
break;
}
default:
{
throw Err("expect id or * after '.'");
}
}
}
return(id);
}