• andre (67/67) Sep 24 2014 Hi,
• =?UTF-8?B?QWxpIMOHZWhyZWxp?= (22/24) Sep 24 2014 Submitted the following bug report:
• =?UTF-8?B?QWxpIMOHZWhyZWxp?= (21/27) Sep 24 2014 1) You need a "this template parameter":
• andre (3/3) Sep 25 2014 Thanks a lot.

"andre" <andre s-e-a-p.de> writes:

Hi,
following code throws an error when I uncomment method 
getPropertyDuplicate.
getPropertyDuplicate is just a copy of getProperty except the 
method name.

Why these errors are thrown?

C:\D\dmd2\windows\bin\..\..\src\phobos\std\traits.d(1257): Error: 
isCallable!(ge
tPropertyDuplicate) is not an expression
source\app.d(25):        while looking for match for 
functionAttributes!(getProp
ertyDuplicate)
C:\D\dmd2\windows\bin\..\..\src\phobos\std\traits.d(1257): Error: 
template insta
nce std.traits.isCallable!(getPropertyDuplicate) error 
instantiating
source\app.d(11):        instantiated from here: 
functionAttributes!(getProperty
Duplicate)
source\app.d(11):        while looking for match for 
functionAttributes!(getProp
ertyDuplicate)

Kind regards
André

template MyTemplate()
{
	import std.traits : isSomeFunction, functionAttributes, 
FunctionAttribute, ReturnType;
	
	string[] getPropertyNames()
	{
		string[] result;
		foreach(m;__traits(allMembers, typeof(this)))
		{
			static if (isSomeFunction!(__traits(getMember, typeof(this), 
m))
			  && functionAttributes!(__traits(getMember, typeof(this), m)) 
& FunctionAttribute.property)
			{
					result ~= m;
			}
		}
		return result;
	}
	
	/*string[] getPropertyDuplicate()
	{
		string[] result;
		foreach(m;__traits(allMembers, typeof(this)))
		{
			static if (isSomeFunction!(__traits(getMember, typeof(this), 
m))
			  && functionAttributes!(__traits(getMember, typeof(this), m)) 
& FunctionAttribute.property)
			{
					result ~= m;
			}
		}
		return result;
	}*/
}

class A {
	mixin MyTemplate;
}

void main() {
	auto a = new A();
}

=?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:

On 09/24/2014 01:11 AM, andre wrote:

              static if (isSomeFunction!(__traits(getMember,
 typeof(this), m))

Submitted the following bug report:

   https://issues.dlang.org/show_bug.cgi?id=13528

import std.traits;

mixin template MyTemplate()
{
     void foo()
     {
         pragma(msg, __traits(getMember, typeof(this), "foo"));
     }
}

class A
{
     mixin MyTemplate;
}

void main()
{
     auto a = new A();
}

Error: Internal Compiler Error: CTFE DotType: this.A
        while evaluating pragma(msg, __traits(getMember, A, "foo"))

Ali

=?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:

On 09/24/2014 01:11 AM, andre wrote:

 template MyTemplate()
 {
      import std.traits : isSomeFunction, functionAttributes,
 FunctionAttribute, ReturnType;

      string[] getPropertyNames()

1) You need a "this template parameter":

     string[] getPropertyNames(this MyType)()

2) Now, replace all typeof(this) expressions with MyType below.

      /*string[] getPropertyDuplicate()

3) Same here:

     string[] getPropertyDuplicate(this MyType)()

And it works! :)

class A {
     mixin MyTemplate;
      property int zzz()
     {
         return 42;
     }
}

void main() {
     auto a = new A();

     import std.string;
     assert(a.getPropertyNames() == [ "zzz" ]);
     assert(a.getPropertyDuplicate() == [ "zzz" ]);
}

Ali

"andre " <Andre s-e-a-p.de > writes:

Thanks a lot.

Kind regards
André