On Sunday, 9 January 2022 at 20:58:05 UTC, forkit wrote:
Do not understand why one line is not considered @safe, but the
other is.
//----
module test;
import std;
@safe void main()
{
immutable string[] strings = ["one", "one", "two"];
immutable(string)*[] pointers = null;
foreach(size_t i, ref str; strings)
{
if(str == "one")
{
//pointers ~= &str; // not allowed in @safe ??
pointers ~= &strings[i]; // for @safe, I have to
revert to using an index into strings.
}
i++;
}
}
//-----
Try the @trusted and in/out:
```d
auto pro(in immutable string[] strings,
out immutable(string)*[] pointers) @trusted {
foreach(i, ref str; strings)
{
if(str == "one")
{
//pointers ~= &strings[i]/* ok
pointers ~= &str;//*/
}
/* unnecessary:
i++;//*/
}
}
@safe void main()
{
immutable string[] strings = ["one", "one", "two"];
immutable(string)*[] pointers = null;
strings.pro(pointers);
assert(pointers[0] ==
&strings[0]); // ok
assert(pointers[1] ==
&strings[1]); // ok
}
```
