• Andrey (7/11) Oct 10 2020 Hello,
• Basile B. (23/34) Oct 11 2020 You can count the commas in the text representation but this is
• Andrey (3/5) Oct 12 2020 ?

Andrey <saasecondbox yandex.ru> writes:

Hello,

How to count a number of parameters in uninitialized template 
method?

For example:
 struct Test
 {
     void abc(int a, bool status, string text)() {}
 {

The method "Test.abc" has three template paramenters.

I know that "TemplateArgsOf" exists but it is used only for 
INITIALIZED templates...

Basile B. <b2.temp gmx.com> writes:

On Sunday, 11 October 2020 at 06:53:59 UTC, Andrey wrote:
 Hello,

 How to count a number of parameters in uninitialized template 
 method?

 For example:
 struct Test
 {
     void abc(int a, bool status, string text)() {}
 {

 The method "Test.abc" has three template paramenters.

 I know that "TemplateArgsOf" exists but it is used only for 
 INITIALIZED templates...

You can count the commas in the text representation  but this is 
not a good solution. The default value of a 
TemplateValueParameter can lead to wrong results, for example if 
it's an array literal or a string literal.

---
size_t countTP(alias T)()
{
     import std.algorithm : count;
     return T.stringof.count(',') + 1;
}

template T1(A){}
template T2(A,B){}
template T3(A,B,C){}

void main()
{
     pragma(msg, countTP!T1);
     pragma(msg, countTP!T2);
     pragma(msg, countTP!T3);
}
---

probably the countTP function can be enhanced to handle corner 
cases I mentioned.

Andrey <saasecondbox yandex.ru> writes:

And what about:
 void test() {}

and
 void text(alias qqq)() {}

?