transpiler | ABAP to JS transpiler & runtime | Transpiler library
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QUESTION
I raised an issue https://github.com/facebook/jest/issues/11504 against the jest project, which I think is responsible for maintaining babel-jest. Transpilation totally fails after adding apparently harmless and error-free code.
However, there are a lot of layers to the transpilation of a Typescript Next project, so I am unsure if this is the correct place to file the issue and matches with the likely source of the failure.
Does this issue seem like it matches with the babel-jest project or should I file it somewhere else?
BUG
I found in a complex Next Typescript project that adding a handful of lines in one file was enough to break babel-jest transpilation and create runtime errors in a completely different file.
In commit 04c4c7b, after checking out the clean project and running yarn
I am able to get passing tests with yarn run test
. The passing source tree is at https://github.com/cefn/jest-transpile-failure-repro/tree/04c4c7b7013e8b88c25d3ab2a7d4a33ccd3fb191
However, after adding the handful of lines which you can see in commit 25703fc the babel-jest transpiler seems to effectively break making tests impossible to run, and a totally unrelated file starts to get runtime errors during the test which make no sense like...
...ANSWER
Answered 2021-Jun-03 at 17:14You are introducing a dependency cycle in your code by adding the new
QUESTION
Consider this code:
...ANSWER
Answered 2021-Apr-28 at 12:01Yeah your first option is the best one. Most readable.
QUESTION
Excuse any mistakes in my code, I'm still learning C++ syntax. My question is not about whether the code is correct but whether a literal expression will be optimized away.
Let's say I have a function generated from a non-type template like this:
...ANSWER
Answered 2021-Apr-13 at 07:51This is never guaranteed for regular if
(although I would say chaneces are pretty high). There are two ways to be sure. Simpler one requires C++17 (btw addIt
seems to return wrong type):
QUESTION
I'm writing a (my own language) to C++ transpiler. I'd like to be able to offer a kind of virtual sub function that is transpiled into being part of the C++ code in the same scope in which it is called.
Here is an example of the type of C++ code I'd want to generate:
...ANSWER
Answered 2021-Apr-12 at 14:50If I correctly get what you are doing, you can simply use lambda expression here. This of course requires C++11
QUESTION
I want to use the BasisTranslator in Qiskit to process my circuit to base gates.
One of the constructor parameters for BasisTranslator is EquivalenceLibrary. I attempted creating a parameter-less EquivalenceLibrary()
and pass it to a BasisTranslator, but the code fails, saying it cannot translate gates like MCT or CCX into the default basis.
ANSWER
Answered 2021-Mar-31 at 10:46The easiest way is to leverage the session equivalence library that is included with qiskit (at qiskit.circuit.equivalence_library.SessionEquivalenceLibrary
) which is a prebuilt equivalence library which includes all the standard library gates. You can use it with something like:
QUESTION
I've got a bit of a code that works fine as an arrow function, but using wkhtmltopdf converting a webpage to an image, it's unable to read arrow functions. That said, I've tried numerous times to make this function without the arrow, but no success yet.
The 'related' answers do not answer my question. I simply can't get this function to return the same data when I remove the arrow for this async function.
Babel transpiler seems unable to do this, as well.
...ANSWER
Answered 2021-Mar-21 at 14:51Would you please try this:
QUESTION
I am looking to make use of the native import/export that comes with ES6.
I am using Serverless Containers within AWS Lambda.
I have my Dockerfile
which looks like this:
ANSWER
Answered 2021-Mar-18 at 10:09If anyone sees this, running into the same problem. Please see the below from AWS Offical Technical Support:
"Your instruction to use package.json { "type": "module" }
are correct but ECMAScript modules are not supported by Lambda Node.js 14 runtime at this moment".
I will post an update to this post when I hear more about when support is available. I am leaving this question here just in case other people run into the same problem.
QUESTION
Use-case: This allows to differ whether the user have used promise-based style or callback style thus I can avoid double computations. I monkey-patch both function and that on-completed setter with ES6 Proxy and now I'm doing expensive computations in both. I want to avoid that. There's no way knowing whether website have used the Promise-based version or callback-version because by the time website call promise based version, the on-completed setter is empty.
The native function in question didn't had promise based version in the past.
I can't use Static Analysis because I'm monkey patching native functions websites use (whose code not under my control)
...ANSWER
Answered 2021-Mar-06 at 19:06Tl;dr Schedule a microtask
The point being that using await schedules the rest of the function as a microtask.
Please note that this answer don't attempt in any way to detect whether a value has been discarded or not. This is solely in answer to the first paragraph (Use-case), dropping the need for the both static code analysis and run-time source code parsing.
The purpose is just to yield control to the calling routine.
await nonPromiseValue
is the same as await Promise.resolve(nonPromiseValue)
. It completes "instantly" but still schedules the code after the await expression to run later. So with f = async () => { await 1; 2;}
and calling f(); g()
the code will first reach await 1 -> sleep f
and schedule the rest on the microtask queue -> call g() ->
(eventually when the microtask queue gets to it) resume f()
continuing with 2
The values from which to what it changes, or whether it does at all, do not make difference.
QUESTION
I have a small, browser-based game that I'm trying to get Jest up and running with.
My goal is to be able to write tests, and to have them run with Jest, and not to have any extra DOM- or browser API-related error messages.
As the game makes use of DOM and canvas, I need a solution where I can either mock those manually, or have Jest take care of it for me. At a minimum, I'd like to verify that the 'data model' and my logic is sane.
I'm also making use of ES6 modules.
Here's what I've tried so far:
- Tried running jest:
ANSWER
Answered 2021-Feb-10 at 18:25Investigation:
Jest runs with jsdom by default.
document
actually exists:
However, since it's mocked, getElementById()
just returns null
.
In this situation, it's not possible to return an existing canvas defined in the HTML document. Rather, one can create the canvas programmatically:
game.js
QUESTION
ANSWER
Answered 2021-Jan-20 at 08:53It should work if you do the following:
- move
Deplorable.g4
tosrc/main/antlr4/com/dpisarenko/deplorable/
(note that you placed it insidesrc/main/antlr4/com.dpisarenko.deplorable/
!) - run
mvn clean antlr4:antlr4
- if not already done, mark
target/generated-sources/antlr4
as the "Generated Sources Root" (right click it in your IDE and selectMark Directory as
)
If not, try using the latest ANTLR4 version: 4.9.1
(not just the tool and runtime, but also for antlr4-maven-plugin
).
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