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smallB:
Guys, that's the unfortunate header file which either doesn't want to get precompiled (with cb 7452) or gets precompiled (with cb 7500) but gives error. Can someone try to precompile it and see if it works for you? Thanks

--- Code: ---#ifndef PROMOTE_H_INCLUDED
#define PROMOTE_H_INCLUDED
#include <type_traits>
#include <boost/mpl/vector.hpp>
#include <boost/mpl/find.hpp>
#include <boost/mpl/next.hpp>
#include <boost/mpl/deref.hpp>
template<class Int_T,class Int_Y>
struct are_same_size
{
    enum {value = sizeof(Int_T) == sizeof(Int_Y)};
};
template<class Int_T>
struct Is_Char
{
    enum {value = false};
};
template<>
struct Is_Char<char>
{
    enum {value = true};
};
template<>
struct Is_Char<unsigned char>
{
    enum {value = true};
};

template<>
struct Is_Char<signed char>
{
    enum {value = true};
};
template<class Integral>
struct Promote
{
    static_assert(std::is_integral<Integral>::value,"Non integral type is not allowed.");
    typedef typename std::conditional<std::is_signed<Integral>::value,
                                boost::mpl::vector<char,short,int,typename std::conditional<!are_same_size<int,long>::value,long,long long>::type>,
    boost::mpl::vector<unsigned char,unsigned short,unsigned int,typename std::conditional<!are_same_size<unsigned int,unsigned long>::value,long,long long>::type>>::type types;

    typedef typename boost::mpl::find<types,
    typename std::conditional<Is_Char<Integral>::value,
    typename std::conditional<std::is_signed<Integral>::value,char,unsigned char>::type, Integral>::type>::type this_type;
typedef typename boost:: mpl::next<this_type>::type next_type;
    typedef typename boost::mpl::deref<next_type>::type type;

};

#endif // PROMOTE_H_INCLUDED
--- End code ---

smallB:
That is my output path - obj\Debug\Checking_if_operator_plus_works.exe (copied directly from cb) so everything looks ok, yet cannot make it working.

smallB:
This is a link to full log. If you download it you'll see that at the very bottom of this log there is a msg saying that there are 28 errors. Yet NO ERROR IS LISTED ANYWHERE. What is going on?http://www.4shared.com/document/wNF2DXGk/Checking_if_operator_plus_work.html

oBFusCATed:
Cannot open the log.
Please use pastebin style site.

Jenna:
The posted error-message:

--- Quote from: smallB on October 25, 2011, 01:07:38 pm ---That's the full log and yes it does create precompiled header when run from command line:

--- Code: ---Build started on: 25-10-2011 at 12:05.29
 Build ended on: 25-10-2011 at 12:05.37

-------------- Build: Debug in e:\Excersizes\meta\Promote ---------------
 g++ -Wall -fexceptions -g -Wshadow -Winit-self -Wredundant-decls -Wcast-align -Wundef -Wfloat-equal -Winline -Wunreachable-code -Wmissing-declarations -Wmissing-include-dirs -Wswitch-enum -Wswitch-default -Weffc++ -Wmain -pedantic-errors -pedantic -std=c++0x -Wfatal-errors -Wextra -Wall -g -ID:\Libraries\boost_1_47_0\boost_1_47_0 -IE:\Excersizes\meta -Ie:\Excersizes\meta -c E:\Excersizes\meta\Promote.h -o E:\Excersizes\meta\Promote.h.gch
 g++ -Wall -fexceptions -g -Wshadow -Winit-self -Wredundant-decls -Wcast-align -Wundef -Wfloat-equal -Winline -Wunreachable-code -Wmissing-declarations -Wmissing-include-dirs -Wswitch-enum -Wswitch-default -Weffc++ -Wmain -pedantic-errors -pedantic -std=c++0x -Wfatal-errors -Wextra -Wall -g -ID:\Libraries\boost_1_47_0\boost_1_47_0 -Ie:\Excersizes\meta -Ie:\Excersizes\meta -c e:\Excersizes\meta\main.cpp -o obj\Debug\main.o
 mingw32-g++.exe -LC:\boost_1_47_0 -o \\bin\Debug\e\Excersizes\meta\Promote.exe obj\Debug\main.o
c:/mingw32/bin/../lib/gcc/mingw32/4.6.1/../../../../mingw32/bin/ld.exe: cannot open output file \\bin\Debug\e\Excersizes\meta\Promote.exe: No such file or directory
 collect2: ld returned 1 exit status
Process terminated with status 1 (0 minutes, 8 seconds)
1 errors, 0 warnings (0 minutes, 8 seconds)
--- End code ---

--- End quote ---
has nothing to do with the output-path you give here:

--- Quote from: smallB on October 25, 2011, 02:39:16 pm ---That is my output path - obj\Debug\Checking_if_operator_plus_works.exe (copied directly from cb) so everything looks ok, yet cannot make it working.

--- End quote ---
the exe-names are different.

Your filesharing-site does not work on my linux-system (maybe I'm to restricted), so I can not look into your log.
Maybe you told C::B to ignore some compiler output ("Settings -> Compiler and debugger -> Other settings -> Compiler output to be ignored:")

As far as I could see, the precompiled header did not lead to an error-message, but:

C::B does not precompile, gcc/g++ does this.
Try a rebuild (with clean) the whole project.

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