Recent questions tagged c++11

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c++11 - Is it possible to write an agile Pimpl in c++?

I've been playing with the Pimpl idiom and reaping all sorts of benefits from it. The only thing I haven't ... would be as few as possible? 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++11 - C++ std::tuple order of destruction

Is there a rule which states in which order the members of an std::tuple are destroyed? For example if Function1 ... the instance of ClassA? } 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++11 - c++ : convert vector to tuple

How can I convert std::vector to std::tuple ? I have class T { }; int cnt = 3; vector<T*> tv; for ... I need to convert this vector to a tuple. 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++11 - How to enable C++0x features in Visual studio? [Initializer Lists support]

I had some code that I developed on Ubuntu and now I am trying to compile it on Windows 7 (MS VS 2010). ... property set to "v100." Thank you. 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++11 - What exactly is an R-Value in C++?

Could someone explain, or point me to some sort of explanation, of what R-Value is? I'm not really sure what it is, ... << " Done." << endl; } 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++11 - Idiomatic Way to declare C++ Immutable Classes

So I have some pretty extensive functional code where the main data type is immutable structs/classes. The way I ... is there a better 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++11 - What is the difference between an empty and a null std::shared_ptr in C++?

The cplusplus.com shared_ptr page calls out a distinction between an empty std::shared_ptr and a null shared_ptr. The ... the C++11 version? 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++11 - C++ memory model and race conditions on char arrays

Basically I have trouble understanding this: (from Bjarne FAQ) However, most modern processors cannot read or ... byte padding between elements? 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++11 - variadic template parameter pack expanding for function calls

I am looking for something like that: template< typename T> void func(T t) { } template< typename... Parms ... list could never work. Any ideas? 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++11 - How to implement timeout for function in c++

I have got function f; I want to throw exception 1s after start f. I can't modify f(). It it possible ... (TimeoutException& e) { //timeout } See Question&Answers more detail:os...

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

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I need a filesystem library for use with a C++11-capable compiler or a C++14-capable one - so it can ... library versions differ quite a bit. 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++11 - Does the C++ standard specify anything on the representation of floating point numbers?

For types T for which std::is_floating_point<T>::value is true, does the C++ standard specify anything on ... can it be completely arbitrary? 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++11 - Comparing 3 modern c++ ways to convert integral values to strings

I was trying to pick a standard way to convert integrals to strings, so I went on and did a small performance ... idea to play with that too. 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++11 - C++ local variable destruction order

Is there a defined order in which local variables are deallocated in C++ (11) ? To be more concise: In which ... the order undefined in C++11? 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++11 - C++ view types: pass by const& or by value?

This came up in a code review discussion recently, but without a satisfactory conclusion. The types in question ... target architectures, etc. 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++11 - C++ metafunction to determine whether a type is callable

Is it possible to write a C++(0x) metafunction that determines whether a type is callable? By callable type I ... I would like to implement. 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++11 - How can I use C++ 11 features in Clang?

How can I use the latest C++ 11 features in Clang? What (sub)set of features is supported? 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++11 - how to avoid static member function when using gsl with c++

I would like to use GSL within a c++ class without declaring member functions as static. The reason for ... everything logical within the class. 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++11 - C++ how to generate all the permutations of function overloads?

Lets say I have classes Date and classes Year, Month and Day. struct Date { Date(Year year, Month month, ... changes not the logic itself. 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++11 - What is the difference between std::atoi() and std::stoi?

What is the difference between atoi and stoi? I know, std::string my_string = "123456789"; In order to convert that ... . Which is safer to use? 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++11 - Parallel Loops in C++

I wonder if there is a light, straight forward way to have loops such as for and range based-for loops ... nice if it worked cross-platform. 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++11 - Refactoring with C++ 11

Given the new toolset provided by c++ lots of programmers, aiming at code simplification, expressiveness, ... and simpler and elegant. 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++11 - Why is value taking setter member functions not recommended in Herb Sutter's CppCon 2014 talk (Back to Basics: Modern C++ Style)?

In Herb Sutter's CppCon 2014 talk Back to Basics: Modern C++ Style he refers on slide 28 (a web copy of ... been writing bad code by being lazy? 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++11 - In C++, is it still bad practice to return a vector from a function?

Short version: It's common to return large objects-such as vectors/arrays-in many programming languages. Is this style ... Not anymore, I hope? 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++11 - cygwin g++ std::stoi "error: ‘stoi’ is not a member of ‘std

I have: -cygwin 1.7.25 on windows 7/32bit -g++ --version --> g++ (GCC) 4.8.2 -libstdc++.a --> ... not find a solution. What's the issue here? 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++11 - What is the meaning of auto when using C++ trailing return type?

Instead of usual void foo (void ) { cout << "Meaning of life: " << 42 << endl; } C++11 allows is an ... is the meaning of auto in this example? 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++11 - What are unevaluated contexts in C++?

One example that frequently comes to mind is : sizeof expression, where it doesn't evaluates the expression but ... , then what are they? 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++11 - What exactly is a 'side-effect' in C++?

Is it a standard term which is well defined, or just a term coined by developers to explain a concept (.. ... objects to function in C++ See Question&Answers more detail:os...

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

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