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Where do “pure virtual function call” crashes come from?
....c:89
#2 0x00007ffff7ad78f7 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#3 0x00007ffff7adda46 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4 0x00007ffff7adda81 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#5 0x00007ffff7ade84f in __cxa_pure_virtual (...
Why is super.super.method(); not allowed in Java?
...bout objects, not functions. If you want task oriented programming, choose C++ or something else. If your object doesn't fit in it's super class, then you need to add it to the "grandparent class", create a new class, or find another super it does fit into.
Personally, I have found this limitation...
static linking only some libraries
...2 -Wl,-Bdynamic -ld1 -ld2
you can also use: -static-libgcc -static-libstdc++ flags for gcc libraries
keep in mind that if libs1.so and libs1.a both exists, the linker will pick libs1.so if it's before -Wl,-Bstatic or after -Wl,-Bdynamic. Don't forget to pass -L/libs1-library-location/ before call...
Can I call memcpy() and memmove() with “number of bytes” set to zero?
...nst unsigned char *src = _src;
while(len-- > 0)
*dst++ = *src++;
return _dst;
}
you should not even have any performance penality other than the function call; if the compiler supports intrinsics/inlining for such functions, the additional check may even make the code a micro-li...
How do I call Objective-C code from Swift?
...
I wrote a simple Xcode 6 project that shows how to mix C++, Objective-C and Swift code:
https://github.com/romitagl/shared/tree/master/C-ObjC-Swift/Performance_Console
In particular, the example calls an Objective-C and a C++ function from the Swift.
The key is to create a sha...
How to split strings across multiple lines in CMake?
... resulting options are passed to the compiler in quotes
/usr/lib64/ccache/c++ -DGTEST_CREATE_SHARED_LIBRARY=1 -Dgtest_EXPORTS -I../ThirdParty/googletest/googletest/include -I../ThirdParty/googletest/googletest -std=c++11 -fno-rtti -fno-exceptions -fPIC -std=c++11 -fno-rtti -fno-exceptions -Wall...
Lua简明教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...el.handsome = false
haoel.name=nil
上面看上去像C/C++中的结构体，但是name,age, handsome, website都是key。你还可以像下面这样写义Table：
1
t = {[20]=100, ['name']="ChenHao", [3.14]="PI"}
这样就更像Key Val...
Programmatically Determine a Duration of a Locked Workstation?
... the Lock State for a given session.
I found my answer here but it was in C++ so i translated as much as i can to C# to get the Lock State.
So here goes:
static class SessionInfo {
private const Int32 FALSE = 0;
private static readonly IntPtr WTS_CURRENT_SERVER = IntPtr.Zero;
privat...
How do I match any character across multiple lines in a regular expression?
...nds [\d\D] / [\w\W] / [\s\S] (demo): s.match(/([\s\S]*)<FooBar>/)[1]
c++ (std::regex) Use [\s\S] or the JS workarounds (demo): regex rex(R"(([\s\S]*)<FooBar>)");
vba vbscript - Use the same approach as in JavaScript, ([\s\S]*)<Foobar>. (NOTE: The MultiLine property of the
RegExp o...
std::shared_ptr of this
...
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