[英]C++ program compiling without functional header
As per CPP Doc , std::greater
is defined in <functional>
header but my C++ program using std::greater
is compiling with TDM-GCC-64 5.1.0 and running with only the following includes : 根据CPP Doc ,
std::greater
在<functional>
标头中定义,但我使用std::greater
C ++程序正在使用TDM-GCC-64 5.1.0进行编译,并且只运行以下包括:
#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <unordered_map>
It could be because <algorithm>
automatically includes <functional>
but since this is not mentioned in the doc, I was wondering is there a way to know this before hand ? 这可能是因为
<algorithm>
自动包含<functional>
但是因为文档中没有提到,我想知道有没有办法知道这个呢?
只是为了结束该主题,结论是这是依赖于实现的,并且应该包括所有必要的头部以便于移植。
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