鉴于此代码: #include <cstdlib>
void func(int x)
{
if (x)
abort();
};
g++ -Werror=suggest-attribute=pure抱怨: error: function might be candidate for attribute ‘pure’ if it is known to return n
为什么Visual Studio在值类型上使用is时会发出警告,但在引用类型上不会发生此警告?第1行和第2行提示警告,而第3行和第4行不提示。 if (5 is object)
if (new Point() is object)
if ("12345" is object)
if (new StringBuilder() is object)
我传递一个lambda像这样一个init捕获循环计数器: #include <iostream>
auto sq(int c, int x) { return c * x * x; }
struct S {
template<class Fun>
void for_each(Fun fun) const {
for (auto i = 1; i < 4; +