Is it possible to inline such a function, as I would do in C using macro or using inline keyword? No. Before reaching this specific instruction, Python interpreters don’t even know if there’s such a function, much less what it does. As noted in comments, PyPy will inline automatically (the above still holds – it … Read more
I guess you’re missing something, here. static function? Declaring a function static will make it “hidden” in its compilation unit. A name having namespace scope (3.3.6) has internal linkage if it is the name of — a variable, function or function template that is explicitly declared static; 3.5/3 – C++14 (n3797) When a name has … Read more
Performance As has been suggested in previous answers, use of the inline keyword can make code faster by inlining function calls, often at the expense of increased executables. “Inlining function calls” just means substituting the call to the target function with the actual code of the function, after filling in the arguments accordingly. However, modern … Read more
First you have to understand the C99 inline model – perhaps there is something wrong with your headers. There are two kind of definitions for inline functions with external (non-static) linkage External definition This definition of a function can only appear once in the whole program, in a designated TU. It provides an exported function … Read more
It means one thing and one thing only: that the compiler will elide multiple definitions of the function. A function normally cannot be defined multiple times (i.e. if you place a non-inline function definition into a header and then #include it into multiple compilation units you will receive a linker error). Marking the function definition … Read more
It worth pointing out that the inline keyword is actually just a hint to the compiler. The compiler may ignore the inline and simply generate code for the function someplace. The main drawback to inline functions is that it can increase the size of your executable (depending on the number of instantiations). This can be … Read more
I wasn’t sure about your claim: Smaller functions are automatically “inlined” by optimizer irrespective of inline is mentioned or not… It’s quite clear that the user doesn’t have any control over function “inlining” with the use of keyword inline. I’ve heard that compilers are free to ignore your inline request, but I didn’t think they … Read more
A function definition with static inline defines an inline function with internal linkage. Such function works “as expected” from the “usual” properties of these qualifiers: static gives it internal linkage and inline makes it inline. So, this function is “local” to a translation unit and inline in it. A function definition with just inline defines … Read more
in K&R C or C89, inline was not part of the language. Many compilers implemented it as an extension, but there were no defined semantics regarding how it worked. GCC was among the first to implement inlining, and introduced the inline, static inline, and extern inline constructs; most pre-C99 compiler generally follow its lead. GNU89: … Read more
Advantages By inlining your code where it is needed, your program will spend less time in the function call and return parts. It is supposed to make your code go faster, even as it goes larger (see below). Inlining trivial accessors could be an example of effective inlining. By marking it as inline, you can … Read more