Re: How can I directly reffer literal element itself inside [] slice?
On Monday, 11 January 2021 at 21:01:57 UTC, Paul Backus wrote:
On Monday, 11 January 2021 at 15:45:51 UTC, Marcone wrote:
I can reffer length of literal string using $.
"Hello World"[0..$]
But I want make like it witout use variable name.
"Hello World"[0..?.indexOf("o")]
The exact syntax you want is impossible. The closest you can
get is to use an `enum` constant, which is essentially a named
literal:
enum hello = "Hello World";
writeln(hello[0 .. hello.countUntil("o")]); // "Hell"
I don't want use enum, I want use literal.
Re: How can I directly reffer literal element itself inside [] slice?
On Monday, 11 January 2021 at 15:45:51 UTC, Marcone wrote:
I can reffer length of literal string using $.
"Hello World"[0..$]
But I want make like it witout use variable name.
"Hello World"[0..?.indexOf("o")]
The exact syntax you want is impossible. The closest you can get
is to use an `enum` constant, which is essentially a named
literal:
enum hello = "Hello World";
writeln(hello[0 .. hello.countUntil("o")]); // "Hell"
Re: How can I directly reffer literal element itself inside [] slice?
On Monday, 11 January 2021 at 16:41:03 UTC, oddp wrote:
On 11.01.21 16:45, Marcone via Digitalmars-d-learn wrote:
"Hello World"[0..?.indexOf("o")]
Does until [1] do the trick?
"Hello World".until("o") // => "Hell"
[1] https://dlang.org/library/std/algorithm/searching/until.html
I want more support inside slice []
Re: How can I directly reffer literal element itself inside [] slice?
On 11.01.21 16:45, Marcone via Digitalmars-d-learn wrote:
"Hello World"[0..?.indexOf("o")]
Does until [1] do the trick?
"Hello World".until("o") // => "Hell"
[1] https://dlang.org/library/std/algorithm/searching/until.html
How can I directly reffer literal element itself inside [] slice?
I can reffer length of literal string using $.
"Hello World"[0..$]
But I want make like it witout use variable name.
"Hello World"[0..?.indexOf("o")]
Re: How can I directly reffer literal element itself inside [] slice?
I am using it:
// 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];}
}
