• Marcone (4/4) Nov 28 2020 void a(T1, T2)(T1 b, T2 c){
• =?UTF-8?Q?Ali_=c3=87ehreli?= (15/19) Nov 28 2020 Since it's optional, T2 must have a default type. I made it 'int' below.
• Marcone (2/21) Nov 28 2020 Thank you! work fine!
• Marcone (21/21) Dec 02 2020 Now my slice works fine.

Marcone <marcone email.com> writes:

void a(T1, T2)(T1 b, T2 c){
	// I need parameter "c" optional, but only (String or int). How 
can I make it without overload function?
}

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 11/28/20 6:40 PM, Marcone wrote:
 void a(T1, T2)(T1 b, T2 c){
  =C2=A0=C2=A0=C2=A0=C2=A0// I need parameter "c" optional, but only (St=

ring or int). How can=20
 I make it without overload function?
 }

Since it's optional, T2 must have a default type. I made it 'int' below.

void a(T1, T2 =3D int)(T1 b, T2 c =3D T2.init)
if (is (T2 =3D=3D string) ||
     is (T2 =3D=3D int))
{
   // ...
}

void main() {
   a(1.5);
   a(2.5, "hello");
   a(3.5, 42);
   static assert(!__traits(compiles, a(4.5, 5.5)));
}

Marcone <marcone email.com> writes:

On Sunday, 29 November 2020 at 02:55:02 UTC, Ali Çehreli wrote:
 On 11/28/20 6:40 PM, Marcone wrote:
 void a(T1, T2)(T1 b, T2 c){
      // I need parameter "c" optional, but only (String or 
 int). How can I make it without overload function?
 }

 Since it's optional, T2 must have a default type. I made it 
 'int' below.

 void a(T1, T2 = int)(T1 b, T2 c = T2.init)
 if (is (T2 == string) ||
     is (T2 == int))
 {
   // ...
 }

 void main() {
   a(1.5);
   a(2.5, "hello");
   a(3.5, 42);
   static assert(!__traits(compiles, a(4.5, 5.5)));
 }

Thank you! work fine!

Marcone <marcone email.com> writes:

Now my slice works fine.


// Tipo Nulo.
class None {}

// Função slice()
auto slice(T1, T2, T3 = None)(T1 conteudo, T2 inicio, T3 fim = 
T3.init) {
	int start, end, startlen;
	static if (is(T2 == int)) {inicio = inicio < 0 ? conteudo.length 
+ inicio : inicio;}
	static if (is(T3 == int)) {fim = fim <= 0 ? conteudo.length + 
fim : fim;}
	static if (is(T2 == int)) {start = inicio;} else static if 
(is(T2 == string)){start = conteudo.countUntil(inicio);}
	static if (is(T2 == string)) {static if (is(T1 == 
string)){startlen = start + inicio.length + 1;} else {startlen = 
start + 1;}}
	static if (is(T3 == int)) {end = fim;} else static if (is(T3 == 
string)){end = startlen + conteudo[startlen..$].countUntil(fim);}
	static if (is(T3 == None)) {return conteudo[start];} else 
{return conteudo[start..end];}
}