Re: [boost] [predef] Using predef-require with OR conditions

On 5/3/2015 9:29 PM, Rene Rivera wrote:

On Sun, May 3, 2015 at 4:55 PM, Edward Diener wrote:

...

In a jamfile I would like to use predef-require in OR situatuations so that if any particular predef-definition is true my unit testing rule occurs, else it does not occur:

import ../libs/predef/check/predef : require : predef-require ;

run some_test.cpp : : : BOOST_COMP_SOME_COMPILER >= n.n.n || other_predef_definiion ;

The typical use case for this is to have a unit test for particular version(s) of a compiler or for all other versions of other compilers.

Is this possible ?

It is possible, and it came up when I first introduced the feature, with some basic De Morgan's application:

run some_test.cpp : : : [ predef-require "BOOST_COMP_SOME_COMPILER < n.n.n" "other_predef_def_negated" ] ;

I do not see how this can work. Let's say I want to run some_test.cpp when either BOOST_COMP_SOME_COMPILER is version n.n.n or above OR when BOOST_COMP_SOME_COMPILER is not being used at all, ie. BOOST_COMP_SOME_COMPILER is equal to 0. How can that be done ?