internal static FunctionToken ReadFunction(TokenCollection stream, bool hasBracket)
{
if (stream.NextIsEndOfStream)
{
throw new HspLogicalLineException("関数：読み込み中にスタックが空になった");
}
FunctionPrimitive token = stream.GetNextToken() as FunctionPrimitive;
if (token == null)
{
throw new HspLogicalLineException("関数：関数プリミティブ以外からスタート");
}
//行末なら強制的に終了
if (stream.NextIsEndOfLine)
{
return(new FunctionToken(token));
}
//ゴーストラベル処理
if (token.HasGhostLabel && (stream.NextToken.CodeType == HspCodeType.Label))
{
stream.GetNextToken();
if (stream.NextIsEndOfLine)
{
return(new FunctionToken(token));
}
}
//次が'('なら引数読み込み
if (stream.NextIsBracketStart)
{
return(new FunctionToken(token, ReadArgument(stream)));
}
//どちらでもないなら、hasBracketで分岐
//hasBracket =falseなら強制的に引数ありに。
if (hasBracket)
{
return(new FunctionToken(token));
}
else
{
return(new FunctionToken(token, ReadArgument(stream)));
}
}
internal FunctionToken(FunctionPrimitive token, ArgumentToken theArg)
{
primitive = token;
arg = theArg;
}
internal FunctionToken(FunctionPrimitive token)
{
primitive = token;
}
