0xFFFFFFFF wrote:
On Wednesday, 21 February 2018 at 09:21:58 UTC, 0xFFFFFFFF wrote:
What is the equivalent of C++17 std::string_view (an object that can
refer to a constant contiguous sequence of char-like objects with the
first element of the sequence at position zero) in D?
PS: I'm getting back to D after years (since DMD 1 days). A lot changes
since v1.0.
Wow! Thanks guys.
Those are handy, but I specifically want to do something like:
```
string_view sv = "some string";
```
So I can query it's size, make it point to sth else, use it in callbacks
etc. Of course I'm aware of scoping etc...
I'm NOT doing any dynamic allocations, I just want a situation where a
string allocation string would be a little bit expensive.
and that is exactly what slices are for! ;-)
you are probably better to use `const(char)[]`, tho. like this:
// don't store `s`, as it's contents may change after exiting of
`myfunc`
// (this is what `const` implies here)
void myfunc (const(char)[] s) { ... }
...
string s = "test string";
myfunc(s); // yep, this works
s = s[2..4]; // this doesn't allocate
myfunc(s);
myfunc(s[3..6]); // or this, it doesn't allocate
myfunc("abc"); // or this, doesn't allocate
you got the idea.
