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QUESTION
I tried to compile an OCaml code with Dune but got the following error:
...ANSWER
Answered 2022-Apr-03 at 10:30The error message is complaining that there is no implementation (aka no ml file) for the module CallccBp
. Without knowing the content of CallccBp
, it is probable that this module contain either an exception or an extension constructor declaration (or any other kind of runtime components). Your first fix should be to add a callccBp.ml
file and remove the (module_without_implementation ...)
line.
QUESTION
I am working with a mongo database model building using mongoengine. I want to modify DictField
by the result created in another function
ANSWER
Answered 2022-Mar-26 at 19:19Maybe you need something like this:
QUESTION
Wrote this code in ocaml (compiling with dune)
...ANSWER
Answered 2022-Mar-05 at 04:52Neither the code fragment that you have written nor the code that you linked raises the ambiguous documentation comment warning. Thus I can only guess what is the real source of the error.
However, it is important to notice that the [unexpected-docstring] comment is about an ambiguous location of a documentation comment. It is not about the content of the comment.
For instance, removing a line break in your code,
QUESTION
I am writing my first Ocaml+OUnit2+Dune project. but in my unit test when I say open Mymaps it says "Unbound module Mymaps"
The structure of my project is as follows
...ANSWER
Answered 2022-Mar-04 at 20:18You need to list mymaps
in the libraries
stanza of the test project, as you would with any other project in your workspace. There's nothing else indicating that this is the library you mean to test.
QUESTION
I am trying to extract some information in a pdf embedded in a web page using python and requests, And this is exactly the sentence I want to reach « Sciences de la vie et de l’environnement ».
Here is the code you wrote :
...ANSWER
Answered 2022-Mar-04 at 14:58You can access the PDF manually (https://fs.uit.ac.ma/wp-content/uploads/2022/02/AVIS-DE-SOUTENANCE-ACHACHI-HIND.pdf) . There is the url in the iframe and request. In case of there is no way to get the url from the source code, you have to scrape the requests (eg. with BrowserMob)
QUESTION
I have a big project built by menhir and traditional makefile. First, I wanted to add a mechanism of error handling like this project to my project.
By following the dune of the sample project, I managed to generate .mly
, .mli
, .ml
, .cmi
and .cmo
of unitActionsParser_e.mly
by the following commands:
ANSWER
Answered 2022-Feb-21 at 19:33This question is indeed related to the interaction of menhir and build systems. Precisely, the inspection API (--inspection
) requires the type information of .mly
(including its semantic actions) to be known. I chose to directly work on parse_e.mly
rather than unitActionsParser_e.mly
, and followed the approach of "Obtaining OCaml type information without calling the OCaml compiler":
menhir --explain --inspection --table --dump --infer-write-query mockfile.ml parser_e.mly
to generatemockfile.ml
ocamlfind ocamlc -I lib -package sedlex -package menhirLib -i mockfile.ml > sigfile
to generatesigfile
. Note that-I lib
refers to the directory of external modules, their.cm[io]
files should be ready to use.menhir --explain --inspection --table --dump --infer-read-reply sigfile parser_e.mly
to generate especiallyparser_e.ml
,parser_e.mli
,.conflicts
andautomaton
.
As a result, parser_e.ml
contains more type information and the inspection API is in Parser_e.MenhirInterpreter
.
QUESTION
I am new to OCaml, and I followed the tutorial to set up a developpement environment. I then tried the helloworld example with dune and OCaml but encoutered the following error:
...ANSWER
Answered 2022-Feb-21 at 14:16You can fix this situation by adding a dune-project
file at the root of your project filled with this line:
QUESTION
I had installed merlin 6 months ago to be able to compile Ocaml and I had no problems. I have recently upgraded to update everything but it was impossible to make the package work.
When I try to reinstall it I get this error message (opam install -y merlin):
...ANSWER
Answered 2022-Feb-15 at 16:13The issue that you have has nothing to do with merlin per se. The problem is that you can't build the compiler using the llvm toolchain, which is used by default on your machine.
The GNU version of the ranlib
tool is able to take several archive arguments, unlike the llvm version of ranlib
that fails on more than one archive.
The general answer is that you should install and select the GNU toolchain in order to build OCaml. I would start my investigation with running which ranlib
to understand why you have the broken ranlib
in the PATH. It could also be possible that you used brew
to install the llvm toolchain, then use brew unlink
to undo this. In the end, you want ranlib
in your path that for ranlib --version
prints GNU ranlib
, not LLVM
.
Also, in macOS, there's the tool called xcode-select
that lets you install and select the toolchains. I don't have the latest version of macOS available, so I can't be sure, but you can try to run xcode-select --install
to install the toolchain and use xcode-select --switch
to select an appropriate one.
With all that said, the OCaml and opam issue trackers are much better places to resolve such problems than SO.
QUESTION
I'm trying to do something very specific, involving sending control chars to stdout and reading from stdin.
I have a working implementation in Python and I am trying to translate it to OCaml.
I was pleasantly surprised that it was possible to translate very directly, almost line-for-line. But when I run it the behaviour is different and the OCaml one does not work.
It appears to me the problem must be some obscure difference between how OCaml and Python runtimes handle the terminal, perhaps stdin specifically.
Firstly here is the working Python code:
...ANSWER
Answered 2022-Jan-31 at 19:07This is a lot of code to read but just from the description it sounds like you're returning the terminal to its old state before flushing the output.
This isn't anything particularly strange about OCaml, but OCaml does have a tendency to hold on to buffered output longer than some other languages.
You might try adding this after the print_string
:
QUESTION
I am trying to select the 5 star
user rating on this Website:
I have tried using actions but I've been unsuccessful.
...ANSWER
Answered 2022-Jan-28 at 10:12It's hard to hover element to make the rating 100% with ActionChains (it's always about 100, but not 100).
Try with js, works for me.
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