<d_bot>
<atlx> Hi, everything was working fine im my project until LLVM now released v14. Now I tried to build my project: `dune build` but I was getting "LLVM not found error," so anyways I update with `opam update && opam upgrade` and now it says LLVM package installation failed
<d_bot>
<atlx> Any ideas?
<d_bot>
<atlx> $ llvm-config --version # Verify active LLVM version.
<d_bot>
<Tom> Hi, I have the following use case for parallel programming in OCaml for which I have no previous experience. I have two functions computing the same thing but using a different method. I would like to run them both in parallel (truly parallel, not concurrently), wait for the first that finishes, and return the result. Could this be achieved easily using some of the existing libraries?
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<yilin>
\test
<yilin>
Oops. @geoff unfortunately I wanted to use the output of a program as an argument; using the generated file works fine. I'm doing the slightly hacky approach of writing the output to the file and then using `${file:read}` which is working but a bit odd.
<d_bot>
<cheeze> hello, how do i inspect the type of `( <- )`. in the ocaml toplevel, i can do things like `( * )` and then it will give me `- : int -> int -> int = <fun>`. but when i do `( <- )`, it's a syntax error
<d_bot>
<leviroth> I don't think `( <- )` is a function
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<d_bot>
<cheeze> is it just a keyword
<d_bot>
<cheeze> like `|`
<d_bot>
<leviroth> Yeah
<d_bot>
<cheeze> the reason why i asked is because
<d_bot>
<cheeze> my vscode actually shows this when i hover over the arrow
<d_bot>
<cheeze> wait, wouldn't indexing only be `int array -> int -> int`
<sim642>
Although <- is also for mutable record fields
<d_bot>
<NULL> You can't override the default value of `( .()<- )` so you can't access it as an operator name
<sim642>
^ the index and assign are combined
<d_bot>
<cheeze> ohhh i see, that whole thing is the operator
<d_bot>
<NULL> But you can define (and inspect) `( .%()<- )` (where `%` can be replaced by a lot of things)
<d_bot>
<cheeze> i see, thank you
<d_bot>
<NULL> (and `( .%() )` for the indexing operator)
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<d_bot>
<cheeze> what are some examples where % is replaced?
<d_bot>
<cheeze> what do i replace it with?
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<d_bot>
<NULL> % is already a valid example, but any string fitting the grammar nonterminal `dot-ext` in the page I linked will work
<sim642>
The indexops page gives the exact characters that you can use for a custom indexing operator
<sim642>
They aren't used very much though
<d_bot>
<cheeze> oh i got it, thank you
<sim642>
AFAIK the owl library is the most prominent user of custom indexing operators
<d_bot>
<cheeze> oke, i will check it out after i finish with this book
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<d_bot>
<cheeze> is it not allowed to have records and data types together like so?
<d_bot>
<cheeze> ```ocaml
<d_bot>
<cheeze> type colour = Red | Yellow | Green | { hex : int }
<d_bot>
<cheeze> ```
<d_bot>
<NULL> `type colour = Red | Yellow | Green | Hex of { hex : int }`
<d_bot>
<NULL> You always need a constructor in a sum type
<d_bot>
<cheeze> oh oke thanks
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<sim642>
Although... if the fields of inline records were distinct, it technically would be possible to distinguish them without a constructor
<sim642>
It would be a terrible idea though
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<d_bot>
<cheeze> oh you mean Hex of int? yeah that works too but the example that i gave was a contrived one
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<d_bot>
<leviroth> How would that work?
<d_bot>
<leviroth> You mean like distinguish them at compile time, but still generate a variant tag to distinguish them at runtime?
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<yilin>
Hi, is there any particular policies about what would be accepted into the Unix bindings of stdlib? There are a few calls which I'd like to use but don't exist yet (in particular `shm_open` for `mmap`).
<haesbaert>
it's POSIX so it's probably at least open for discussion