• Charles Hixson (13/13) Jun 18 2013 Would:
• Justin Whear (6/19) Jun 20 2013 A debug block works just like any other version(...) block: if the
• Justin Whear (3/24) Jun 20 2013 Ah my bad, I didn't realize you were asking about the function containin...
• bearophile (6/10) Jun 20 2013 At a low optimization level probably dmd keeps the call to the

Charles Hixson <charleshixsn earthlink.net> writes:

Would:
void    test(string s = "default message")
{ debug
   {
       .........
   } // debug
} // test

be optimized away in code that was compiled with debug turned off?

I've documented my code that this is a noop unless debug is true, but 
I'm not really sure that's correct, or whether there would be a function 
call

-- 
Charles Hixson

Justin Whear <justin economicmodeling.com> writes:

On Tue, 18 Jun 2013 12:39:31 -0700, Charles Hixson wrote:

 Would:
 void    test(string s = "default message")
 { debug
    {
        .........
    } // debug
 } // test
 
 be optimized away in code that was compiled with debug turned off?
 
 I've documented my code that this is a noop unless debug is true, but
 I'm not really sure that's correct, or whether there would be a function
 call

A debug block works just like any other version(...) block: if the 
version is not set, the compiler ignores the block completely.  The 
contents of the block are parsed (must be syntactically valid) but no 
semantic analysis or code-gen is performed on it, so unless the version 
is set, it's as if the contents of the block never existed.

Justin Whear <justin economicmodeling.com> writes:

On Thu, 20 Jun 2013 22:56:08 +0000, Justin Whear wrote:

 On Tue, 18 Jun 2013 12:39:31 -0700, Charles Hixson wrote:
 
 Would:
 void    test(string s = "default message")
 { debug
    {
        .........
    } // debug
 } // test
 
 be optimized away in code that was compiled with debug turned off?
 
 I've documented my code that this is a noop unless debug is true, but
 I'm not really sure that's correct, or whether there would be a
 function call

 
 A debug block works just like any other version(...) block: if the
 version is not set, the compiler ignores the block completely.  The
 contents of the block are parsed (must be syntactically valid) but no
 semantic analysis or code-gen is performed on it, so unless the version
 is set, it's as if the contents of the block never existed.

Ah my bad, I didn't realize you were asking about the function containing 
the block.

"bearophile" <bearophileHUGS lycos.com> writes:

Charles Hixson:

 I've documented my code that this is a noop unless debug is 
 true, but
 I'm not really sure that's correct, or whether there would be a 
 function call

At a low optimization level probably dmd keeps the call to the 
empty function. At a high optimization level the call probably is 
optimized away.

Bye,
bearophile