http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57775
Bug ID: 57775 Summary: default argument for template parameter error for friend definition in template Product: gcc Version: 4.7.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: cooloud at gmail dot com MinGW4.7.2 cannot not parse a very simple code like following, source code: template <class T=void> struct X { friend void f(){ struct Y{}; // line 6 } }; command and result: C:\Users\HJ>g++ -v -Wall -Wextra -c tmp.cpp Using built-in specs. COLLECT_GCC=g++ Target: mingw32 Configured with: ../gcc-4.7.2/configure --enable-languages=c,c++,ada,fortran,obj c,obj-c++ --disable-sjlj-exceptions --with-dwarf2 --enable-shared --enable-libgo mp --disable-win32-registry --enable-libstdcxx-debug --disable-build-poststage1- with-cxx --enable-version-specific-runtime-libs --build=mingw32 --prefix=/mingw Thread model: win32 gcc version 4.7.2 (GCC) COLLECT_GCC_OPTIONS='-v' '-Wall' '-Wextra' '-c' '-shared-libgcc' '-mtune=i386' ' -march=i386' c:/mingw/bin/../libexec/gcc/mingw32/4.7.2/cc1plus.exe -quiet -v -iprefix c:\min gw\bin\../lib/gcc/mingw32/4.7.2/ tmp.cpp -quiet -dumpbase tmp.cpp -mtune=i386 -m arch=i386 -auxbase tmp -Wall -Wextra -version -o C:\Users\HJ\AppData\Local\Temp\ cc3msAXa.s GNU C++ (GCC) version 4.7.2 (mingw32) compiled by GNU C version 4.7.2, GMP version 5.0.1, MPFR version 2.4.1, MPC version 0.8.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 ignoring nonexistent directory "c:\mingw\bin\../lib/gcc/mingw32/4.7.2/../../../. ./mingw32/include" ignoring duplicate directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.7.2/inclu de/c++" ignoring duplicate directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.7.2/inclu de/c++/mingw32" ignoring duplicate directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.7.2/inclu de/c++/backward" ignoring duplicate directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.7.2/inclu de" ignoring duplicate directory "/mingw/lib/gcc/mingw32/4.7.2/../../../../include" ignoring duplicate directory "c:/mingw/lib/gcc/../../include" ignoring duplicate directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.7.2/inclu de-fixed" ignoring nonexistent directory "c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.7.2/../ ../../../mingw32/include" ignoring duplicate directory "/mingw/include" #include "..." search starts here: #include <...> search starts here: c:\mingw\bin\../lib/gcc/mingw32/4.7.2/include/c++ c:\mingw\bin\../lib/gcc/mingw32/4.7.2/include/c++/mingw32 c:\mingw\bin\../lib/gcc/mingw32/4.7.2/include/c++/backward c:\mingw\bin\../lib/gcc/mingw32/4.7.2/include c:\mingw\bin\../lib/gcc/mingw32/4.7.2/../../../../include c:\mingw\bin\../lib/gcc/mingw32/4.7.2/include-fixed End of search list. GNU C++ (GCC) version 4.7.2 (mingw32) compiled by GNU C version 4.7.2, GMP version 5.0.1, MPFR version 2.4.1, MPC version 0.8.1 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: fdc0bc7c97f61ac24bf8edb5646b3bc3 tmp.cpp: In function 'void f()': tmp.cpp:6:11: error: default argument for template parameter for class enclosing 'f()::Y::Y'