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D - preprocessor __FILE__ and __LINE__

From: http://www.digitalmars.com/d/pretod.html


	8.  	 Assert function file and line number information:

 The C Preprocessor Way
        #define assert(e)       ((e) || _assert(__LINE__, __FILE__))


My understanding is that in D there is no equivelant of __FILE__ or __LINE__
because assert has somthing like that built in.

I am acustomed to using __FILE__ and __LINE__ in C to define a "log"
macro that looks a bit like:

#define log(severiry, message, ...) _log_real (__FILE__, __LINE__, severity,


This lets me see where a log message comes from.

I also have somthing like:

#define my_assert(expr) (void){ if (!expr) _handle_assert(#expr, __FILE__,
__LINE__) }

.. then in _handle_assert I dump some state info and the assert mesasge into
a file (and sometimes email it back to base from a customer site).

I am impressed by D's attention to addressing quality issues
(DBC, unit testing etc) but feel that the ability to have custom
error handling and logging infrastructure with line file:line
information is essential to ensuring quality.

Will D provide some mechanism for building a customised assert in future?

Sam
Apr 19 2004