Hello,
Phoenix is an outstanding component, I have no doubt about that.
However I have had some mixed results for my use case using V2 and now
switching to V3.
I'm writing a (header only/template) library which uses Boost.Phoenix
internally.
By nature this library (a mock object library) often ends up in
precompiled headers because it's convenient to have it de facto included
for whole (unit test) applications.
By default Microsoft Visual Studio allocates a certain amount of memory
for compiling a precompiled header, and if it actually needs more then
it fails to compile.
For instance with only :
#include
Here is the error message with vc80 :
...boost/fusion/container/vector/vector10.hpp(52) : error C3859:
virtual memory range for PCH exceeded; please recompile with a command
line option of '-Zm160' or greater
...boost/fusion/container/vector/vector10.hpp(52) : fatal error
C1076: compiler limit : internal heap limit reached; use /Zm to specify
a higher limit
The location of the error is irrelevant, the value suggested by the
compiler is what matters. Here it suggests to add /Zm160 to the command
line.
This is pretty huge, the default is actually /Zm100, and I'd say "big"
Boost libraries are around 50.
/Zm100 now means 75MB since vc90 instead of 50MB for vc80, which helps a
bit, but still...
Here is a quick survey I did with vc80, using a /Zm1 to trigger an error
every time.
The number on the right is the required /Zm value for including only the
file on the left.
boost/phoenix/phoenix.hpp 160
"equivalent of content of boost/phoenix/phoenix.hpp for Phoenix 2" 107
boost/phoenix/core/nothing.hpp 61
boost/spirit/home/phoenix/core/nothing.hpp 52
boost/phoenix/statement/throw.hpp 62
boost/spirit/home/phoenix/statement/throw.hpp 54
boost/phoenix/bind.hpp 43
boost/spirit/home/phoenix/bind.hpp 56
boost/bind.hpp 17
boost/lambda/bind.hpp 27
boost/lambda/lambda.hpp 30
boost/function.hpp 36
boost/function_types/function_type.hpp 31
boost/test/auto_unit_test.hpp 41
boost/concept_check.hpp 16
boost/type_traits/remove_reference.hpp 12
boost/proto/proto.hpp 55
boost/proto/domain.hpp 20
Note that an empty pch requires /Zm11
Now extracting only the includes from Phoenix to other Boost libraries
using :
grep -rh "include
