Recent questions tagged C++

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c++ - Why is CMake designed so that it removes runtime path when installing

I built my shared library(I use a lib calculating the fibonacci number for example) myself and want to use it in ... ...) into CMakeLists.txt ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - C++11 rvalue reference calling copy constructor too

I've been testing some C++11 features from some some. I came across r-value references and move constructors ... called 1024287 times. Any clue? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - What is the actual purpose of std::type_info::name()?

Today a colleague of mine came and asked me the question as mentioned in the title. He's currently trying ... which bloat executable (GCC) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Convert first letter in string to uppercase

I have a string: "apple". How can I convert only the first character to uppercase and get a new string in ... string is a multibyte character ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - why do i need to use piecewise_construct in map::emplace for single arg constructors of noncopyable objects?

The following code will not compile on gcc 4.8.2. The problem is that this code will attempt to copy construct an ... like a charm return 0; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - 'inet_pton': identifier not found

I'm trying to include the following code in my program but the error ('inet_pton': identifier not found) will ... missed some headers or lib. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - std::unique_ptr with derived class

I have a question about the c++11 pointers. Specifically, how do you turn a unique pointer for the base ... , any advice would be appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - loop condition evaluation

Just a quick question. I have a loop that looks like this: for (int i = 0; i < dim * dim; i++) Is the ... 0; i < dimSquare; i++) Thanks -Faken See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Overload resolution and arrays: which function should be called?

Consider the following program: #include <cstddef> #include <cstdio> void f(char const*&&) { std::puts("char const* ... the latest C++0x draft? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Cannot use .begin() or .end() on an array

The error reads: request for member 'begin', 'end' in 'arr' which is non class type int[5], unable to deduce ... ; mypointer++; } return 0; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Meaningful stack traces for address sanitizer in GCC

I just tried compiling with GCC and the -fsanitize=address flag. When I run my program, the address sanitizer finds ... : fe ==32415== ABORTING See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Function template with an operator

In C++, can you have a templated operator on a class? Like so: class MyClass { public: template<class T> T ... this method of use a non-starter? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to pass an std::string to glShaderSource?

I have the following code: glShaderSource(shader, 1, (const char **)data.c_str(), NULL); But it makes ... but obviously it makes no difference. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How do you iterate backwards through an STL list?

I'm writing some cross-platform code between Windows and Mac. If list::end() "returns an iterator that addresses ... implemented in a for loop? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - What are differences between std, tr1 and boost (as namespaces and/or libraries)?

I initially thought they're all the same, but it turned out to be wrong. So can anyone briefly explain the differences ... C++ ( C++0x ). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Is extern "C" only required on the function declaration?

I wrote a C++ function that I need to call from a C program. To make it callable from C, I specified ... which is technically the "right" way. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - What could go wrong if copy-list-initialization allowed explicit constructors?

In the C++ standard, §13.3.1.7 [over.match.list], the following is stated: In copy-list-initialization, if an ... go wrong? What am I missing? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Determining if an unordered vector<T> has all unique elements

Profiling my cpu-bound code has suggested I that spend a long time checking to see if a container contains ... out a bit more efficiency? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Assignment operator with reference members

Is this a valid way to create an assignment operator with members that are references? #include <new> struct A ... missed. Did I miss anything? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to use CMAKE_EXPORT_COMPILE_COMMANDS?

I've been trying to use clang-modernize with CMAKE_EXPORT_COMPILE_COMMANDS as recommended in the help of this tool ... than Visual Studio. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - C++11: std::thread pooled?

In C++03 I used pthread with a self-built thread pool that always kept a couple of threads running (since ... up to the standard library? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Type condition in template

Is it possible to build only some part of the code given the type of the template in C++ ? It would be something ... ; printType(1); return 0; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Visual Studio 2013 error MS8020 Build tools v140 cannot be found

I had previously been using VS2013 express without issue, but suddenly it began crashing whenever I tried edit ... Platform.targets 64 5 Bevan See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to build a full path string (safely) from separate strings?

Does C++ have any equivalent to python's function os.path.join? Basically, I'm looking for something that ... avoid that in the future. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Which header should I include for `size_t`?

According to cppreference.com size_t is defined in several headers, namely <cstddef> <cstdio> <cstring> <ctime> And, ... Does it matter at all? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Unable to install LLVM toolchain for Eclipse CDT

Im trying to get Clang working again on Eclipse and therefore I've tried to install the LLVM toolchain over the ... working on Eclipse Mars ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Is it ever not safe to throw an exception in a constructor?

I know that it's not safe to throw exceptions from destructors, but is it ever unsafe to throw exceptions from ... leak, would that be correct? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to identify top-level X11 windows using xlib?

I'm trying to get a list of all top level desktop windows in an X11 session. Basically, I want to get a ... could point be to a better resource? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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