For the TypeScript ANTLR target that Sam and I have been working on, I would like to have the code generation tool create a single typescript file to hold all the classes generated from a named grammar input. Is this output file structure going to be hard?
So for example, I'd like Expr.g4 -> Expr.g4.ts. That one file TypeScript file could contain named exports for {ExprLexer, ExprParser, and ExprListener} classes, visitor code if requested, maybe even some loose factory functions etc.
I've been looking into the source code under tool/src/org/antlr/v4/codegen to find out how the number and names of the output files are determined, in particular finding CodeGenPipeline.java, This class works in conjunction with the language-specific target class, but the pipeline has a lot (perhaps too much) knowledge of possible output files built into it. None of what I see in CodeGenPipeline.java seems well matched to my 1:1 input-to-output file model.
It seems like the knowledge of what files should be generated for a given language target should come from the language.stg file if possible, but I can't find any evidence that approach has been implemented. Can anyone fill me in on any reasons that approach can't hasn't been tried or worked?
Related
I am creating a npm library where I need to read the files of the folder from where my library function were invoked from command line and then operate on those files.
By operation I mean to check if a variable exist, if a function exists, modifying variable, function,etc.
The files will be a Typescript files.
Any help on how to proceed will be great.
Seems like you need some kind of AST parser like Esprima or babel-parser. These tools can parse the content of JS/TS files, build the abstract syntax tree that can be traversed, modified and converted back to the source code.
There's a lot of useful tools available in Babel toolset that simplifies these operations. For example, babel-traverse simplifies searching the target statement or expression, babel-types that helps to match the type of the AST nodes and babel-generator that generates the source code from the AST.
It's going to be very difficult to get these answers without running the files.
So the best approach is probably to just import the files as usual and see what side-effects running the files had. For example, you can check if a file exported anything.
If this doesn't solve your problem, you will have to parse the files. The best way to do that might be to use the typescript compiler itself:
https://github.com/microsoft/TypeScript/wiki/Using-the-Compiler-API
You can find a mention of it here: https://code.visualstudio.com/api/language-extensions/language-server-extension-guide
however without any explanation. I couldn't find information about it by googling.
What is the purpose of a .clientrc file?
As mentioned in the comments, ".clientrc" was just chosen as an example file name.
If you google site:code.visualstudio.com clientrc, that page is the only search result. And googling site:github.com/microsoft/vscode "clientrc", all the results are about example code (and most are about that example code specifically).
The .*rc file name pattern is a common convention for application-specific configuration files. There's a baeldung article on it:
Names including rc often signify files or directories of files with code. Specifically, this code consists of commands that are meant to run when a program is executed. Indeed, that program can be an application, but it can also be a whole operating system.
Because of this, the original rc affix and extension both meant “run commands”. In particular, a widely accepted source of the term is the Compatible Time-Sharing System (CTSS)
I am attempting to convert parts of an Android app to iOS using Doppl, and I am getting a strange result: Doppl keeps trying to pull in android.arch.lifecycle:reactivestreams, even though I don't want it to.
Specifically, in app/build/j2objcSrcGenMain/android/arch/lifecycle/, there is a reactivestrams/ subdirectory with R.h and R.m files in it. This seems to make Xcode cranky and may explain why I had some oddities with pod install.
My app/build.gradle has compile "android.arch.lifecycle:reactivestreams:$archVer", because my activity is using LiveDataReactiveStreams.fromPublisher(). However:
The activity is not in the translatePattern (and since its code is not showing up in app/build/j2objcSrcGenMain/, I have to assume that the translatePattern is fine)
I do not have a doppl statement related to reactivestreams, because there does not appear to be a Doppl conversion of this library (nor should it be needed here)
AFAIK, nowhere else in this app am I referring to LiveDataReactiveStreams, which AFAIK is the one-and-only public class from the reactivestreams library
So, the questions:
What determines whether Doppl creates R.h and R.m files for some dependency? It's not the existence of a doppl statement, as I have doppl statements for a lot of other dependencies (RxJava, RxAndroid, Retrofit) and those do not get R.h and R.m files. It's not whether the dependency is referenced from generated code, as my repository definitely uses RxJava and Retrofit, yet there are no R files for those.
How can I figure out why Doppl generates R.h and R.m for reactivestreams?
Once I get this cleared up... do I re-run pod install, or is there some other pod command to refresh an existing pod with a new implementation?
Look into 'app/build/generated/source/r/debug' and confirm there's an R.java being created for the architecture component. It'll be under 'android/arch/lifecycle/reactivestrams'.
I think there are 2 problems here.
Problem 1
Somehow Doppl/J2objc is of the opinion that this file should be transpiled. It could be either that 'translatePattern' matches with it, or that something in the shared code is referencing it. If you can't figure out which, please post a comment and I'll try to help (or post in slack group).
Problem 2
Regardless of why that 'R.java' is being sucked into the translate step, because of how stock J2objc is configured, the code is being generated with package folders instead of creating One Big Name. That generated file should be called 'AndroidArchLifecycleReactivestramsR.h' (and AndroidArchLifecycleReactivestramsR.m). Xcode really doesn't like package folders. That's why there's a slightly custom J2ojbc being used with Doppl, so we can have files with big names instead of folders.
In cases where you intentionally use package names that match with what J2objc considers to be "system" classes, you need to provide a header mapping file to force long names. The 'androidbase' doppl library needs to add a lot of files that are in the 'android' package, which J2objc considers "system". We override those names in the mapping file.
build.gradle
https://github.com/doppllib/core-doppl/blob/master/androidbase/build.gradle#L19
mapping file
https://github.com/doppllib/core-doppl/blob/master/androidbase/src/main/java/androidbase.mappings
I screwed up.
In my dopplConfig, I have:
translatePattern {
include '**/api/**'
include '**/arch/**'
include '**/RepositoryTest.java'
}
In this case, **/arch/** not only matches my arch package, but also the arch package from the Architecture Components.
Ordinarily, this would not matter, because the Architecture Components source code is not in my project. But, R.java gets generated, due to resources, and the translatePattern includes generated source code in addition to lovingly hand-crafted source code. So, that's where my extraneous Objective-C was coming from.
Many thanks to Kevin Galligan for his assistance with this, out on the #newbiehelp Doppl Slack channel!
I am trying to write source code in one language and have it converted to both native c++ and JS source. Ideally the converted source should be human readable and resemble the original source as best it can. I was hoping haxe could solve this problem for me. So I code in haxescript and have it convert it to its corresponding C++ and JS source. However the examples I'm finding of haxe seems to create the final application for you. So with C++ it will use msbuild (or whatever compiler it finds) and creates the final exe for you from generated C++ code. Does haxe also create the c++ and JS source code for you to view or is it all done internally to haxe and not accessible? If it is accessible then is it possible to remove the building side of haxe so it simply creates the source code and stops?
Thanks
When you generate CPP all the intermediate files are generated and kept wherever you decide to generate your output (the path given using -cpp pathToOutput). The fact that you get an executable is probably because you are using the -main switch. That implies an entry point to your application but that is not really required and you can just pass to the command line a bunch of types that you want to have built in your output.
For JS it is very similar, a single JS file is generated and it only has an entry point if you used -main.
Regarding the other topic, does your Haxe code resembles the generated code the answer is yes, but ... some of the types (like Enum and Abstract) only exist in Haxe so they will generate code that functionally works but it might look quite different. Also Haxe has an always-on optimizer/analyzer that might mungle your code in unexpected ways (the analyzer can be disabled). I still find that it is not that difficult to figure out the Haxe source from the generated code. JS has support for source mapping which is really useful for debugging. So in the end, Haxe doesn't do anything to obfuscate your generated code but also doesn't do much to try to preserve it too strictly.
Today i decided to see up Groovy source code and to built up my programming muscles in Groovy. I downloaded the Groovy Source code 1.8 from this link. But how do i proceed? In sense which folder first i have to see, so that i can understand better how groovy works(because there are many folders like benchmarks,bootstraps, src etc). May be this seems to be stupid question but i wanna to ask it.
Correct me if am worng.
The source code is inside src/main.
The unit tests all live inside src/test.
I found a good place to start looking was inside the huge class:
src/main/org/codehaus/groovy/runtime/DefaultGroovyMethods.java
This is where a lot of the extra Groovy methods are defined, so you can pick your favourite function (such as String.capitalize for example) and find the definition of that method (around line 9561, but that might be different in the version of the code you have downloaded)
You should then be able to (for example) change how something works, and check that the unit tests still function by calling
ant test
from the root folder, then you should see it build and test reports should be created and placed in the target folder
I tend to use a combination of find and grep to locate the area in the source that I am interested in, then slowly expand out from that class as I find other things that relate to it...
Hope this helps...it's a bit of a big question to try and cover