Re: [Boost-build] [Boost-commit] svn:boost r86565 - trunk/tools/build/v2/tools

Subject: Re: [Boost-build] [Boost-commit] svn:boost r86565 - trunk/tools/build/v2/tools
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2013-11-06 10:31:44

AMDG

On 11/05/2013 01:33 AM, jurko.gospodnetic_at_[hidden] wrote:
> Author: jurko
> Date: 2013-11-05 04:33:37 EST (Tue, 05 Nov 2013)
> New Revision: 86565
> URL: http://svn.boost.org/trac/boost/changeset/86565
> 
> Log:
> Stylistic change - jam construct like 'if $(var)-is-not-empty' does not actually test whether the $(var) variable is not empty and instead tests whether the variable is defined at all to any value. Specifically, if the variable is defined as an empty string, the test will still pass.
> 

FWIW, empty in this case means empty list, not empty string.
local var = ; # $(var)-is-defined evaluates to false

> Text files modified: 
>    trunk/tools/build/v2/tools/msvc.jam |     4 ++--                                    
>    1 files changed, 2 insertions(+), 2 deletions(-)
> 

In Christ,
Steven Watanabe