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digitalmars.D.learn - faking a C logging macro

reply Tydr Schnubbis <fake address.dude> writes:
Can I get something like this in D, using mixins or whatever?

#define log(s) logprintf(__FILE__ ": " __FUNCTION__ ": %s", s)
Apr 20 2006
parent reply BCS <BCS_member pathlink.com> writes:
Tydr Schnubbis wrote:

 Can I get something like this in D, using mixins or whatever?
 
 #define log(s) logprintf(__FILE__ ": " __FUNCTION__ ": %s", s)



sed "/log\(/logprintf(__FILE__ `: ` __FUNCTION__ `: %s`, /" in.d -o out.d

???

No but seriously folks, I have wanted something like this a few times myself. 
Particularly, some way to get the __FILE__, etc. set of constants of the line 
where a template is instanced. Something like the following would be great.



template log(
   char[] s,
   char[] fi = __FILE__,
   int li = __LINE__,
   char[] fn = __FUNCTION__)  // const defaults come from called location
{
	const char[] log = ...
}


main.d
int i;
void main()
{
	pragma(msg, log!("this is broken!!!");
}



compile time output:
main.d:4 this is broken!!!
Apr 20 2006
parent clayasaurus <clayasaurus gmail.com> writes:
According to the D change log   version .116 this was included.
"Added __FILE__, __LINE__, __DATE__, __TIME__, __TIMESTAMP__."

Maybe ask Walter to add __FUNCTION__ ?

You might want to check out build's preprocessor stuff as well. 
http://www.dsource.org/forums/viewtopic.php?t=624


BCS wrote:

 Tydr Schnubbis wrote:

 Can I get something like this in D, using mixins or whatever?

 #define log(s) logprintf(__FILE__ ": " __FUNCTION__ ": %s", s)


 
 
 sed "/log\(/logprintf(__FILE__ `: ` __FUNCTION__ `: %s`, /" in.d -o out.d
 
 ???
 
 No but seriously folks, I have wanted something like this a few times 
 myself. Particularly, some way to get the __FILE__, etc. set of 
 constants of the line where a template is instanced. Something like the 
 following would be great.
 
 
 
 template log(
   char[] s,
   char[] fi = __FILE__,
   int li = __LINE__,
   char[] fn = __FUNCTION__)  // const defaults come from called location
 {
     const char[] log = ...
 }
 
 
 main.d
 int i;
 void main()
 {
     pragma(msg, log!("this is broken!!!");
 }
 
 
 
 compile time output:
 main.d:4 this is broken!!!
Apr 20 2006