在头文件中包含大量Vector

Question

So I have a massive vector that I load line by line from a file in C++ using an std::ifstream object. This works, but I was thinking, hey why don't I write the vector to a .cpp file like below and just #include it as a header:

std::vector<std::vector<std::string>> vectorOfGates2 = { {
"Q_OR04 g359(.A0 (i2), .A1 (i1), .A2 (i0), .A3 (i3), .Z (ptm_replace_0));",
},
{
"Q_OR04 g357(.A0 (i2), .A1 (i1), .A2 (ptm_replace_0), .A3 (i3), .Z (ptm_replace_1));",
"Q_INV g358(.A (i0), .Z (ptm_replace_0));",
},
{
"Q_OR04 g357(.A0 (i2), .A1 (i0), .A2 (ptm_replace_0), .A3 (i3), .Z (ptm_replace_1));",
"Q_INV g358(.A (i1), .Z (ptm_replace_0));",
}};

When I do this with a small vector and #include the file it works (vectorOfGates is in a file called vector.cpp that I just include). However GCC gives me a segmentation violation error if I try it with a big vector (it takes like three minutes of trying to build to cause this error:

 22%] Building CXX object CMakeFiles/framework_roman_src_rtl.dir/MappingSingleton.cpp.o
/grid/common/pkgs/gcc/v6.3.0p2/bin/g++  -DBUILD_TO_RUN_WITH_XCELIUM -DET6=ET6 -DLINUX2 -D_GLIBCXX_USE_CXX11_ABI=0 -I/grid/cva/p4_02/hisham/gcc/ua/Framework/Roman/src/x86-lx2-64 -I/grid/cva/p4_02/hisham/gcc/ua/Framework/Roman/src -I/grid/cva/p4_02/hisham/gcc/ap/include -I/grid/cva/p4_02/hisham/gcc/ua/Framework/include -I/grid/cva/p4_02/hisham/gcc/ua/include -I/grid/cva/p4_02/hisham/gcc/sys/avs/xlm/19.03/s1/include -I/grid/cva/p4_02/hisham/gcc/sys/include/x86-lx2-64  -std=c++14 -g   -pthread -g -Wall -Werror -std=gnu++14 -o CMakeFiles/framework_roman_src_rtl.dir/MappingSingleton.cpp.o -c /grid/cva/p4_02/hisham/gcc/ua/Framework/Roman/src/MappingSingleton.cpp
g++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
gmake[2]: *** [CMakeFiles/framework_roman_src_rtl.dir/MappingSingleton.cpp.o] Error 4
gmake[2]: Leaving directory `/grid/cva/p4_02/hisham/gcc/ua/Framework/Roman/src/cmake-build-debug'
gmake[1]: *** [CMakeFiles/framework_roman_src_rtl.dir/all] Error 2
gmake[1]: Leaving directory `/grid/cva/p4_02/hisham/gcc/ua/Framework/Roman/src/cmake-build-debug'
gmake: *** [all] Error 2

What am I doing wrong? The same size vector loads if I try doing it using a ifstream line by line, so I don't wknow what's different here. Thanks.

Answer 1

One possibility is to declare you array in a way that only uses static data, with no constructors needing to be called. Then the entire thing will be compile time data. Something like

const char *vectorOfGates2[][MAX_SIZE] = {
    { "string1" },
    { "string2", "string3" },
    // ...
};

Where MAX_SIZE is a constant that holds the maximum number of entries for any particular row of the vector.

If necessary, this can be converted to a std::vector<std::vector<std::string>> (or std::vector<std::vector<const char *>> ) upon program startup, depending on how you need to use it. But leaving it as the static array would use the least amount of memory, as no dynamic memory would need to be allocated.