• Marc (4/13) Dec 30 2017 Works fine for say a enum member such nameof!(myEnum.X) but this:
• rjframe (3/22) Dec 30 2017 You can use the name of the struct rather than the instance.
• Marc (2/28) Dec 31 2017
• Marc (2/26) Dec 31 2017 Put it at global scope. Worked fine.
• Marc (4/31) Dec 31 2017 call to nameof!(C.a)

Marc <jckj33 gmail.com> writes:

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)

rjframe <dlang ryanjframe.com> writes:

On Sat, 30 Dec 2017 13:07:49 +0000, 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));

Marc <jckj33 gmail.com> writes:

On Saturday, 30 December 2017 at 23:30:02 UTC, rjframe wrote:
 On Sat, 30 Dec 2017 13:07:49 +0000, 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)

Marc <jckj33 gmail.com> writes:

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 +0000, 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.

Marc <jckj33 gmail.com> writes:

On Saturday, 30 December 2017 at 23:30:02 UTC, rjframe wrote:
 On Sat, 30 Dec 2017 13:07:49 +0000, 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