constexpr

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C++中constexpr与模板元编程的基础、常见问题、易错点及其规避策略

目录constexpr：编译时常量表达式基本概念常见问题与易错点1. 误解constexpr函数的限制2. 忽略constexpr变量初始化时机实战示例模板元编程基本概念常见问题与易错点1. 模板递归过深2. 难以理解和维护实战示例：计算平[详细]

2024-08-14 12:33 分类：开发
Function returning constexpr does not compile

Why doesn\'t this compile: Could there be a problem with a string as a return type? constexpr开发者_开发问答 std::string fnc()[详细]

2023-04-13 00:55 分类：问答
static constexpr method implementation causes gcc bug?

Here is a piece of code: class Class { static constexpr int getBug(); }; constexpr int Class::getBug() { return 0;[详细]

2023-04-11 12:51 分类：问答
Doesn't std::piecewise_construct cause a ODR violation?

std::piecewise_construct, defined in <utility>, has internal linkage since it is declared constexpr. I wonder if use of std::piecewise_construct in a header can violate ODR. For example:[详细]

2023-04-10 11:59 分类：问答
"surprising" constant initialization because of definition order

When reading the slides about constexpr the introduction is about \"surprisingly dynamic initialization with consts\". The example is[详细]

2023-04-09 18:20 分类：问答
C++11: std::max(a,b) in static_assert()?

I noticed, that in [24.4.7] of the last C++-Std Doc N3291 max ist not constexpr: template<class T> const T& max(const T& a, const T& b);[详细]

2023-03-29 09:02 分类：问答
constexpr question, why do these two different programs run in such a different amount of time with g++?

I\'m using gcc 4.6.1 and am getting some interesting behavior involving calling a constexpr function. This program runs just fine and straight away prints out 12200160415121876738.[详细]

2023-03-28 17:29 分类：问答
Function call constant propagation in C++

I couldn\'t find the answer through searching, so next step is asking. Say I have some code like this:[详细]

2023-03-25 15:42 分类：问答
constexpr with operator|=

I tried to write a function, which returns an integer with only the highest bit of the input set, using a C++0x constexpr.[详细]

2023-03-22 16:22 分类：问答
C++0x error with constexpr and returning template function

I tried to find a solution for the problem of the question C++ template non-type parameter type deduction, which does not involve a template parameter to call f, but implicitly chooses the correct typ[详细]

2023-03-20 23:51 分类：问答