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digitalmars.D - So what about better C?

reply Rel <relmail rambler.ru> writes:
* Have you already used it? What for?
* Is there any known big projects in it?
* What D libraries can be used with it?
* What ways of coding is considered ideomatic in better C?
* Can better C be used without C's runtime (for example for OS 
kernels or other bare metal projects)?
Jun 14
parent Dennis <dkorpel gmail.com> writes:
On Sunday, 14 June 2020 at 19:50:47 UTC, Rel wrote:
 * Have you already used it? What for?
Yes. - making my D libraries smaller in binary size - running D code on a Nintendo 64 emulator - WebAssembly (https://github.com/dkorpel/tictac)
 * Is there any known big projects in it?
The Digital Mars C/D compilers (dmd and dmc) where converted from C to D a few years ago with help of betterC. In terms of lines of code those are the biggest public projects that used betterC I think.
 * What D libraries can be used with it?
mir is a pretty notable one that has betterC compatibility, e.g.: https://github.com/libmir/mir-optim bindbc bindings have betterC right in the name: https://github.com/BindBC For more, see: https://code.dlang.org/search?q=betterC
 * What ways of coding is considered ideomatic in better C?
Writing new betterC code is not 'idiomatic'. The official use case is merely to convert C to D while sticking as close to the original source as possible, and maybe refactor it afterwards to idiomatic 'full D' if you like. In any case, you can do these things while keeping things betterC: - change pointers + length to slices - change memset, memcpy, strcmp to slice syntax - replace for() with foreach() - change pointer parameters to ref / out - replace goto with scope guards or inner functions - make code safe and pure (you get nothrow and nogc for free from C codebases)
 * Can better C be used without C's runtime (for example for OS 
 kernels or other bare metal projects)?
Yes, though the compiler might sometimes emit a call to certain C runtime functions such as `memcpy`, `memset`, `memcmp`, or `assert` for assertions with -betterC. If you get a link error, provide an implementation for it or remove the code that generates those calls.
Jun 14