编译器何时内联 C++ 代码? [英] When do compilers inline C++ code?

问题描述

在 C++ 中，是否仅在显式声明 inline(或在头文件中定义)时才内联方法，还是允许编译器在他们认为合适的情况下内联方法?

In C++, do methods only get inlined if they are explicitly declared inline (or defined in a header file), or are compilers allowed to inline methods as they see fit?

推荐答案

是的，编译器可以内联代码，即使它没有显式声明为 inline.

Yes, the compiler can inline code even if it's not explicitly declared as inline.

基本上，只要不改变语义，编译器几乎可以对生成的代码做任何想做的事情.该标准不会对生成的代码强制执行任何特殊操作.

Basically, as long as the semantics are not changed, the compiler can virtually do anything it wants to the generated code. The standard does not force anything special on the generated code.

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