←back to thread

The C23 edition of Modern C

(gustedt.wordpress.com)
397 points bwidlar | 2 comments | 15 Oct 24 16:06 UTC | HN request time: 0s | source
Show context
belter ◴[15 Oct 24 17:30 UTC] No.41850897[source]▶
Important reminder just in the Preface :-)

Takeaway #1: "C and C++ are different: don’t mix them, and don’t mix them up"

replies(6): >>41850960 #>>41851047 #>>41851166 #>>41851693 #>>41853183 #>>41855660 #
pjmlp ◴[15 Oct 24 17:35 UTC] No.41850960[source]▶
Specially relevant to all those folks that insist on "Coding C with a C++ compiler", instead of safer language constructs, and standard library alternatives provided by C++ during the last decades.
replies(3): >>41851031 #>>41851082 #>>41851268 #
com2kid ◴[15 Oct 24 17:48 UTC] No.41851082[source]▶
Perfectly valid to do if you need to interface with a large C code base and you just want to do some simple OO here and there. Especially if you cannot have runtime exceptions and the like.

This is how I managed to sneak C++ into an embedded C codebase. We even created some templates for data structures that supported static allocation at compile time.

replies(2): >>41851140 #>>41852515 #
f1shy ◴[15 Oct 24 17:53 UTC] No.41851140[source]▶
What would be an example of "simple OO here and there" that cannot be done cleanly in plain C?
replies(6): >>41851225 #>>41851244 #>>41851407 #>>41851799 #>>41851998 #>>41854294 #
adamrezich ◴[15 Oct 24 18:02 UTC] No.41851244[source]▶
Namespaces, methods.
replies(1): >>41851261 #
f1shy ◴[15 Oct 24 18:04 UTC] No.41851261[source]▶
Namespaces is not object orientation, is it? Am I missing something? You can place functions (methods) inside of structs in C23, can't you?
replies(3): >>41851286 #>>41851339 #>>41851481 #
adamrezich ◴[15 Oct 24 18:10 UTC] No.41851339{6}[source]▶
Correct, and you did ask specifically for OO things, but I thought I'd list namespaces too as far as “C++ things you might use when writing C-like C++ code”.

Another big one that I always forget C still doesn't support is function overloading.

replies(1): >>41852319 #
1. uecker ◴[15 Oct 24 19:39 UTC] No.41852319{7}[source]▶
Function overloading is a feature that makes code less self-documenting without providing any meaningful value. Operator overloading is more interesting, because you can build you domain language with nice syntax. But I also tend to think that this is not really worth it.
replies(1): >>41853276 #
2. adamrezich ◴[15 Oct 24 21:25 UTC] No.41853276[source]▶
In C++ where you have methods? Sure. It would be nice to have in C, though. But, alas, ABI compatibility.