• Igor Shirkalin (18/18) May 27 2017 Hi,
• Stanislav Blinov (8/26) May 27 2017 No, you'd have to at least write
• Igor Shirkalin (2/11) May 27 2017 Thank you!

Igor Shirkalin <mathsoft inbox.ru> writes:

Hi,

I try to make a class template with single template argument 
defaulted to some type.
Is it possible to use the name of class without specification of 
template argumet (no '!' operator)?

Example:

class ClassName(T=double) {
     this(T value) { /// do some stuff here
     }
     /// some other stuff..
}


void main() {
     a = ClassName(1.2); /// error:  cannot deduce function from 
argument types !()(int)
     a = ClassName!double(1.2); /// OK
}

It seems the compiler treats 'ClassName' as function, but it is 
obvious that it should treat it as 'ClassName!double'.

Stanislav Blinov <stanislav.blinov gmail.com> writes:

On Saturday, 27 May 2017 at 19:23:59 UTC, Igor Shirkalin wrote:
 Hi,

 I try to make a class template with single template argument 
 defaulted to some type.
 Is it possible to use the name of class without specification 
 of template argumet (no '!' operator)?

 Example:

 class ClassName(T=double) {
     this(T value) { /// do some stuff here
     }
     /// some other stuff..
 }


 void main() {
     a = ClassName(1.2); /// error:  cannot deduce function from 
 argument types !()(int)
     a = ClassName!double(1.2); /// OK
 }

 It seems the compiler treats 'ClassName' as function, but it is 
 obvious that it should treat it as 'ClassName!double'.

No, you'd have to at least write

auto a = new ClassName!()(1.2);

Or you could define a make function:

auto makeClassName(T = double)(T value) {
     return new ClassName!T(value);
}

auto a = makeClassName(1.2);

Igor Shirkalin <mathsoft inbox.ru> writes:

On Saturday, 27 May 2017 at 19:30:40 UTC, Stanislav Blinov wrote:
 On Saturday, 27 May 2017 at 19:23:59 UTC, Igor Shirkalin wrote:
 [...]

 No, you'd have to at least write

 auto a = new ClassName!()(1.2);

 Or you could define a make function:

 auto makeClassName(T = double)(T value) {
     return new ClassName!T(value);
 }

 auto a = makeClassName(1.2);

Thank you!