Re: take symbol as parameter
On Saturday, 30 December 2017 at 23:30:02 UTC, rjframe wrote:
On Sat, 30 Dec 2017 13:07:49 +, Marc wrote:
how do I take a symbol as parameter?
for example:
template nameof(alias S) {
import std.array : split;
enum nameof = S.stringof.split(".")[$-1];
}
Works fine for say a enum member such nameof!(myEnum.X) but
this:
struct S { int v; }
S s;
writefln(nameof!(s.v)); // should return "v"
return the following error:
Error: template instance nameof!(v) cannot use local 'v' as
parameter
to > non-global template nameof(alias S)
You can use the name of the struct rather than the instance.
writefln(nameof!(S.v));
How do I make it work when the symbol is defiend as following:
class C { int a() { return 0; }}
call to nameof!(C.a)
give compiler error:
Error: need 'this' for 'a' of type 'int()'
template instance foo.nameof!(a) error instantiating
Re: take symbol as parameter
On Sunday, 31 December 2017 at 22:50:12 UTC, Marc wrote: On Saturday, 30 December 2017 at 23:30:02 UTC, rjframe wrote: On Sat, 30 Dec 2017 13:07:49 +, Marc wrote: how do I take a symbol as parameter? for example: [...] Works fine for say a enum member such nameof!(myEnum.X) but this: [...] return the following error: [...] You can use the name of the struct rather than the instance. writefln(nameof!(S.v)); it doesn't work for me: Error: template instance nameof!(v) cannot use local 'v' as parameter to non-global template nameof(alias S) Put it at global scope. Worked fine.
Re: take symbol as parameter
On Saturday, 30 December 2017 at 23:30:02 UTC, rjframe wrote:
On Sat, 30 Dec 2017 13:07:49 +, Marc wrote:
how do I take a symbol as parameter?
for example:
template nameof(alias S) {
import std.array : split;
enum nameof = S.stringof.split(".")[$-1];
}
Works fine for say a enum member such nameof!(myEnum.X) but
this:
struct S { int v; }
S s;
writefln(nameof!(s.v)); // should return "v"
return the following error:
Error: template instance nameof!(v) cannot use local 'v' as
parameter
to > non-global template nameof(alias S)
You can use the name of the struct rather than the instance.
writefln(nameof!(S.v));
it doesn't work for me:
Error: template instance nameof!(v) cannot use local 'v' as
parameter to non-global template nameof(alias S)
Re: take symbol as parameter
On Sat, 30 Dec 2017 13:07:49 +, Marc wrote:
> how do I take a symbol as parameter?
>
> for example:
>
>> template nameof(alias S) {
>> import std.array : split;
>> enum nameof = S.stringof.split(".")[$-1];
>>}
>
> Works fine for say a enum member such nameof!(myEnum.X) but this:
>
>> struct S { int v; }
>> S s;
>> writefln(nameof!(s.v)); // should return "v"
>
> return the following error:
>
>> Error: template instance nameof!(v) cannot use local 'v' as parameter
>> to > non-global template nameof(alias S)
You can use the name of the struct rather than the instance.
writefln(nameof!(S.v));
take symbol as parameter
how do I take a symbol as parameter?
for example:
template nameof(alias S) {
import std.array : split;
enum nameof = S.stringof.split(".")[$-1];
}
Works fine for say a enum member such nameof!(myEnum.X) but this:
struct S { int v; }
S s;
writefln(nameof!(s.v)); // should return "v"
return the following error:
Error: template instance nameof!(v) cannot use local 'v' as
parameter to > non-global template nameof(alias S)
