• Martin Krejcirik (15/15) Jul 21 2013 Is it somehow possible to evaluate a string on template parameters ?
• =?UTF-8?B?QWxpIMOHZWhyZWxp?= (19/32) Jul 21 2013 import std.algorithm;
• Martin Krejcirik (5/13) Jul 21 2013 Thanks, actually findSplit is what I need, but works like a charm. CTFE
• Artur Skawina (10/28) Jul 21 2013 Not enough context; I'm not sure what exactly you want to achieve.

Martin Krejcirik <mk-junk i-line.cz> writes:

Is it somehow possible to evaluate a string on template parameters ?
Something like this:

enum source = "TYPE var;";

template Eval(TYPE)
{
	string Eval()
	{
		return evaluate(source);  <-- replace TYPE with int
	}
}

mixin(Eval!int); <-- int var here


Basically I need a string mixin inserted into the template before the
template parameters are evaluated.


-- 
mk

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

On 07/21/2013 09:26 AM, Martin Krejcirik wrote:
 Is it somehow possible to evaluate a string on template parameters ?
 Something like this:

 enum source = "TYPE var;";

 template Eval(TYPE)
 {
 	string Eval()
 	{
 		return evaluate(source);  <-- replace TYPE with int
 	}
 }

 mixin(Eval!int); <-- int var here


 Basically I need a string mixin inserted into the template before the
 template parameters are evaluated.

import std.algorithm;

enum source = "TYPE var;";

template Eval(TYPE)
{
     string Eval()
     {
         string statement = source;
         auto found = statement.findSkip("TYPE");
         assert(found);

         return TYPE.stringof ~ statement;
     }
}

void main()
{
     mixin(Eval!int);
     static assert(is (typeof(var) == int));
}

Ali

Martin Krejcirik <mk-junk i-line.cz> writes:

On 21.7.2013 19:15, Ali Çehreli wrote:
     string Eval()
     {
         string statement = source;
         auto found = statement.findSkip("TYPE");
         assert(found);
 
         return TYPE.stringof ~ statement;
     }

Thanks, actually findSplit is what I need, but works like a charm. CTFE
rox !


-- 
mk

Artur Skawina <art.08.09 gmail.com> writes:

On 07/21/13 18:26, Martin Krejcirik wrote:
 Is it somehow possible to evaluate a string on template parameters ?
 Something like this:
 
 enum source = "TYPE var;";
 
 template Eval(TYPE)
 {
 	string Eval()
 	{
 		return evaluate(source);  <-- replace TYPE with int
 	}
 }
 
 mixin(Eval!int); <-- int var here
 
 
 Basically I need a string mixin inserted into the template before the
 template parameters are evaluated.

Not enough context; I'm not sure what exactly you want to achieve.

The above can simply be done like this:

   enum source = "TYPE var;";

   mixin template Eval(TYPE) { mixin(source); }

   void main() {
       mixin Eval!int;
       static assert (is(typeof(var) == int));
   }

artur