internal static SExpression Create(Lexer.Token head)
{
return(new SExpression
{
IsCall = false,
Head = head,
Tail = Array.Empty <SExpression>()
});
}
internal static SExpression Create(Lexer.Token head, IReadOnlyList <SExpression> tail)
{
return(new SExpression
{
IsCall = true,
Head = head,
Tail = tail
});
}