Re: container vs standard array
On Tuesday, 19 September 2023 at 20:20:17 UTC, Nick Treleaven wrote: On Tuesday, 19 September 2023 at 19:57:34 UTC, Nick Treleaven wrote: This is because a single array can be passed to a typesafe variadic parameter rather than elements of that array type. And then immutable(char) doesn't convert to string. I think a non-variadic overload could be added to make it work as expected. https://github.com/dlang/phobos/pull/8818 Thank you very much.
Re: container vs standard array
On Tuesday, 19 September 2023 at 19:57:34 UTC, Nick Treleaven wrote: This is because a single array can be passed to a typesafe variadic parameter rather than elements of that array type. And then immutable(char) doesn't convert to string. I think a non-variadic overload could be added to make it work as expected. https://github.com/dlang/phobos/pull/8818
Re: container vs standard array
On Tuesday, 19 September 2023 at 06:35:01 UTC, JG wrote:
On Tuesday, 19 September 2023 at 00:34:01 UTC, vino wrote:
//auto a = Array!string("Aname"); // throws error
auto b = Array!char("Bname");// works
auto c = Array!string("Aname", "Bname"); // works
...
Looks to me like when it receives a single range it expects the
elements of that range to match the type.
Yes, the first overload fails to match because U is inferred as
immutable(char) rather than string:
this(U)(U[] values...)
if (isImplicitlyConvertible!(U, T))
This is because a single array can be passed to a typesafe
variadic parameter rather than elements of that array type. And
then immutable(char) doesn't convert to string.
I think a non-variadic overload could be added to make it work as
expected.
Re: container vs standard array
On Tuesday, 19 September 2023 at 00:34:01 UTC, vino wrote:
Hi All,
I am trying to understand as to why the below code is throwing
error
Code
```
import std.stdio: writeln;
import std.container.array;
void main () {
//auto a = Array!string("Aname"); // throws error
auto b = Array!char("Bname");// works
auto c = Array!string("Aname", "Bname"); // works
//writeln(a);
writeln("Container Array :", b);
writeln("Container Array :", c);
writeln();
string[] d = ["Dname"]; // works
string[] e = ["Dname", "Ename"]; // works
writeln("Standard Array :", d);
writeln("Standard Array :", e);
}
```
From,
Vino
Looks to me like when it receives a single range it expects the
elements of that range to match the type. If I am correct in the
first one if you replace the "Aname" by ["Aname"] it should work
container vs standard array
Hi All,
I am trying to understand as to why the below code is throwing
error
Code
```
import std.stdio: writeln;
import std.container.array;
void main () {
//auto a = Array!string("Aname"); // throws error
auto b = Array!char("Bname");// works
auto c = Array!string("Aname", "Bname"); // works
//writeln(a);
writeln("Container Array :", b);
writeln("Container Array :", c);
writeln();
string[] d = ["Dname"]; // works
string[] e = ["Dname", "Ename"]; // works
writeln("Standard Array :", d);
writeln("Standard Array :", e);
}
```
From,
Vino
