I have a C++11 header and source file to call from swift (of course i'm including the header in the bridging header). I've set the build settings for C++ to:
"C++ Language Dialect" -> "C++11 [-std=c++11]"
"C++ Standard Library" -> "libc++ (LLVM standard C++ library with C++11 support)"
It still can't find some #include (file not found):
#include <map>
#include <memory>
#include <set>
#include <string>
#include <vector>
#include <utility>
#include <cassert>
#include <iostream>
#include <algorithm>
#include <utility>
As mentioned in one of the comments, you can use a wrapper. In fact, the wrapper doesn't even have to be in Objective-C. It can actually be a C++ wrapper, but the functions intended to be called from Swift should have C linkage. See http://www.swiftprogrammer.info/swift_call_cpp.html for a tutorial.
Related
Right now I'm quite extensively using the C++-Api for LLVM IR. I'm using CLion as my IDE and im building and linking the project via a Makefile.
The includes look like the following
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Type.h"
The problem now is that I don't have any syntax highlighting for the things coming from the llvm headers. How do I enable that.
I'm trying to build my project, which uses things like __cpuid and __cpuidex, so I need intrin.h. When I try to include it and build my project, I get two errors. They are:
`tagMENUBARINFO::fUnused`: type of bit field too small for number of bits
in winuser.h, and in minwindef.h I get the error
`BOOL`: redefinition; different basic types
My includes:
#include <Windows.h>
#include <string>
#include <vector>
#include <sstream>
#include <map>
#include <algorithm>
#include <intrin.h>
I need all of these includes, so removing some isn't really an option.
I'm using Visual Studio 2019 as my compiler, my Windows SDK Version is 10.0, and the C++ language standard is ISO C++14 Standard.
I was trying to compile an old code, and received the following error:
error G1A4676F8: no member named '__find_end' in namespace 'std'
I searched online and found it is defined in stl_algo.h, which I couldn't find in my Windows system. Also, the documentations were of libstdc++4 and earlier.
The code compiles fine on https://godbolt.org/ with all MSVC versions.
The include statements are:
#include <string>
#include <algorithm>
#include <iterator>
#include <ostream>
#include <iomanip>
#include <stdexcept>
The compiler shows an alternative as find_end defined in algorithm but I am not sure if __find_end has the same functionality as find_end.
So, my question is, is __find_end deprecated?
If not, where can I find it's declaration in Windows?
If yes, what are my alternatives? Is find_end a perfect substitute for __find_end?
As per CPP Doc, std::greater is defined in <functional> header but my C++ program using std::greater is compiling with TDM-GCC-64 5.1.0 and running with only the following includes :
#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <unordered_map>
It could be because <algorithm> automatically includes <functional> but since this is not mentioned in the doc, I was wondering is there a way to know this before hand ?
Just to close the topic, the conclusion is that this is implementation dependent and all the necessary headers should be included for portability.
I can litterally not find which library/header this function is in, I've looked at so many examples of people using this function, but there are no results...
These are all the stuff I've included:
#include "Console.h"
#include "Direct3D9.h"
#include <string>
#include <cerrno>
#include <cstdlib>
#include <iostream>
#include <algorithm>
#include <math.h>
#include <cmath>
#include <stdio.h>
#include <stdlib.h>
But still strtof comes up as "Error namespace "std" has no member "strtof""
What I'm trying to do:
flValue = std::strtof( vszArgs.at( 1 ).c_str( ), NULL );
pConVar->Set( flValue );
Visual Studio 2012 does not implement strtof.
Link to MSDN bug report which includes a suggested workaround.
You can find it in cstdlib when using C++11. The information can easily be found here : http://www.cplusplus.com/reference/cstdlib/strtof/?kw=strtof
My guess is that you aren't compiling using c++11.
1) Include stdlib.h
#include <stdlib.h> /* strtof */
from http://www.cplusplus.com/reference/cstdlib/strtof/
If that still doesn't work...
2) Make sure your compiler is C++11 or newer
It's new as of C++11 so if you have an older compiler it won't work.
If that still doesn't work...
3) Your compiler may just not support it
Visual C++ 2012 does not have full support for the C++11 standard. See the Visual Studio bug "Missing strtof, strtold, strtoll, strtoull functions from stdlib.h".
We don't yet have those functions in the CRT. We will consider adding them to a future version of Visual C++.