Being reading a lot about betterC, but still have some questions

[H. S. Teoh]

On Tue, Jul 09, 2024 at 08:03:15PM +0000, kiboshimo via Digitalmars-d-learn wrote:
> On Tuesday, 9 July 2024 at 14:42:01 UTC, monkyyy wrote:
> > On Tuesday, 9 July 2024 at 07:54:12 UTC, kiboshimo wrote:
[...]
> > > Really liked the idea of doing it with betterC to start my systems
> > > programming journey
> > 
> > Theres nothing even slightly pleasant or easy about d's wasm
> > "support"; I wrote my own cos, sqrt functions, you get *nothing*
> > from phoboes
> 
> Writing my own math functions is outside of my range, I still have
> hopes of this not being so hard. So you get another opportunity to
> crush it.
[...]

What are you planning to run your wasm on?  If in the browser, you could
just use the browser's JS math functions.  The performance won't be
stellar (the wasm-JS boundary is SLOW), but it'd work and you wouldn't
have to write your own math functions.  This is what I use in my own
D/wasm project.  (It'd probably still beat any hand-written WASM
reimplementation of math functions that you write.  Remember, wasm is
interpreted, so it won't beat the browser's built-in native math
functions, which in all likelihood use the CPU's hardware math
instructions.)

If you're planning to run your wasm in a native environment, you could
probably just use the C API to interface with the host system's C
library functions.

Don't reinvent the square wheel unless you're planning to ride it on an
inverted catenary road. :-P

//

On a larger note, if you're planning to write something small that runs
in a browser, you might be interested to check out:

	https://github.com/Ace17/dscripten

This is the D equivalent of emscripten. While it's nowhere near the
maturity of emscripten itself, it may be Good Enough(tm) for your use.
Rather than wrangling with the WASM/JS API (it's still early stage,
there are a LOT of bumps currently still in the road), just let LLVM
convert your D code straight into JS and run it as JS in the browser.
Then you can leverage all the existing JS APIs your browser already
supports, instead of having to reinvent yet another square wheel.


T

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