[filesystem] mbstate_t is not a member of std in libs/filesystem/example/mbpath.cpp

[Farid Zaripov <faridz@…>]

From ​this log:

    "g++"  -ftemplate-depth-128 -O0 -fno-inline -Wall -g -m64 -march=nocona -fPIC -nostdinc++ -DBOOST_ALL_NO_LIB=1 -DBOOST_FILESYSTEM_DYN_LINK=1 -DBOOST_SYSTEM_DYN_LINK=1 -D_RWSTDDEBUG  -I".." -I"/var/tmp/stdcxx/4.2.x/gcc/11D/include" -I"/var/tmp/stdcxx/4.2.x/include" -I"/var/tmp/stdcxx/4.2.x/include/ansi" -c -o "/var/tmp/boost/results/boost/bin.v2/libs/filesystem/test/mbpath.test/gcc-4.3.0_stdcxx_422/debug/address-model-64/architecture-x86/instruction-set-nocona/stdlib-stdcxx-4.2.2/mbpath.o" "../libs/filesystem/test/../example/mbpath.cpp"

../libs/filesystem/test/../example/mbpath.cpp:27: error: ???mbstate_t??? is not a member of ???std???
../libs/filesystem/test/../example/mbpath.cpp:27: error: ???mbstate_t??? is not a member of ???std???
../libs/filesystem/test/../example/mbpath.cpp:27: error: template argument 3 is invalid
../libs/filesystem/test/../example/mbpath.cpp:28: error: invalid type in declaration before ???(??? token
../libs/filesystem/test/../example/mbpath.cpp:28: error: ???mbstate_t??? is not a member of ???std???
../libs/filesystem/test/../example/mbpath.cpp:28: error: ???mbstate_t??? is not a member of ???std???
../libs/filesystem/test/../example/mbpath.cpp:28: error: template argument 3 is invalid

The proposed patch:

Index: libs/filesystem/example/mbpath.cpp
===================================================================
--- libs/filesystem/example/mbpath.cpp	(revision 49128)
+++ libs/filesystem/example/mbpath.cpp	(working copy)
@@ -13,6 +13,7 @@
 #   error This compiler or standard library does not support wide-character strings or paths
 # endif
 
+#include <cwchar>
 #include "mbpath.hpp"
 #include <boost/system/system_error.hpp>
 #include <boost/scoped_array.hpp>

[Beman Dawes]

Thanks for the patch! The same problem was also fixed in wide_test.

--Beman