鑑於此代碼: #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
爲什麼Visual Studio在值類型上使用is時會發出警告,但在引用類型上不會發生此警告?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)
我傳遞一個lambda像這樣一個init捕獲循環計數器: #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; +