pfr | user defined types without any macro or boilerplate code | SDK library

by boostorg C++ Version: 2.1.0 License: BSL-1.0

X-Ray Key Features Code Snippets Community Discussions(9)Vulnerabilities Install Support

kandi X-RAY | pfr Summary

pfr is a C++ library typically used in Utilities, SDK applications. pfr has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

This is a C++14 library for very basic reflection that gives you access to structure elements by index and provides other std::tuple like methods for user defined types without any macro or boilerplate code. Boost.PFR is a part of the Boost C++ Libraries. However, Boost.PFR is a header only library that does not depend on Boost. You can just copy the content of the "include" folder from the github into your project, and the library will work fine. For a version of the library without boost:: namespace see PFR.

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Quality

Security

License

Reuse

Support

pfr has a medium active ecosystem.

It has 1139 star(s) with 145 fork(s). There are 48 watchers for this library.

It had no major release in the last 12 months.

There are 24 open issues and 57 have been closed. On average issues are closed in 186 days. There are 5 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of pfr is 2.1.0

Quality

pfr has 0 bugs and 0 code smells.

Security

pfr has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

pfr code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

pfr is licensed under the BSL-1.0 License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

pfr releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

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pfr Key Features

No Key Features are available at this moment for pfr.

pfr Examples and Code Snippets

No Code Snippets are available at this moment for pfr.

Community Discussions

Trending Discussions on pfr

boost::pfr with customized member

How to develop a constexpr implementation of boost::pfr::for_each?

R chisq.test - automate through a df, each variable with each, df has data, not counts, wide form

How to import FreeType to my Android Studio NDK project using CMake

applying std algorithms over structs?

How to parse xml-string(not a file) without namespace in Python 3.7.3?

FFMPEG - Apple 720p30 Surround MP4 H.264 AAC stereo; Dolby Digital

ImageDataGenerator for multi task output in Keras using flow_from_directory

How to run the subquery with the non equality clause on Spark?

QUESTION

boost::pfr with customized member

Asked 2022-Jan-20 at 15:48

I'm trying to use boost::pfr for basic reflection, and it fails to compile when one of the member is customized type, like a class or struct, why is this? What's the way to fix it? I'm using C++17.

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ANSWER

Answered 2022-Jan-20 at 15:48

It is surprisingly easy to build a reflection system with modern C++. Here is an example from my own library (C++20 and a WIP). NOTE: The design of this library is heavily influenced by boost fusion, which you might consider if you want to complex things in a portable C++ library

Source https://stackoverflow.com/questions/70788871

QUESTION

How to develop a constexpr implementation of boost::pfr::for_each?

Asked 2022-Jan-19 at 00:47

I am using boost::pfr and it's quite impressive the way it uses reflection without any neccesity of macro registering of variables.

But the issue I wonder is why boost::pfr::for_each was not declared as constexpr, avoiding in current situation the use of PFR for_each within any constexpr function declared by users.

Is there any way I can bypass this issue without changing original boost::pfr source code?

EDIT: I include a working example and a link to coliru to show my point.

https://coliru.stacked-crooked.com/a/443f8bd2ad66ca4c

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ANSWER

Answered 2022-Jan-19 at 00:47

This looks like an oversight in the implementation, given that it could easily be constexpr, at least for the C++17 implementation - godbolt example

In the meantime you can build your own constexpr one using boost::pfr::structure_tie (which is constexpr) & std::apply:

godbolt example

Source https://stackoverflow.com/questions/70760036

QUESTION

R chisq.test - automate through a df, each variable with each, df has data, not counts, wide form

Asked 2021-Oct-27 at 20:07

I have a data-frame that looks like this:

...

ANSWER

Answered 2021-Oct-27 at 20:07

The function colpair_map from corrr package seems to provide one way as you need just the p-value. (Looping over the columns is the obvious alternative, of course).

Source https://stackoverflow.com/questions/69744428

QUESTION

How to import FreeType to my Android Studio NDK project using CMake

Asked 2021-May-21 at 19:31

Hello I am beginner in Android NDK programming and I need some help getting freetype library to work with my project. I've been trying for 3 hours straight to somehow import freetype to my Android Studio project. I searched on the internet and could not find any solution that was working. I downloaded the library and put it in my cpp folder of the project.But I don't know how to include freetype. Any help would be appreaciated!

This is how my CMakeLists.txt look and for the files that I have added it works for them:

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ANSWER

Answered 2021-May-21 at 19:31

Ok the solution was very simple. All I did actually was I created directory in cpp folder named freetype and in that dir I've put every freetype file and just added that folder as sub directory in CMake and linked at the end and now eveyrthing works. Here is my CMake:

Source https://stackoverflow.com/questions/67622957

QUESTION

applying std algorithms over structs?

Asked 2021-Apr-11 at 14:00

We have Boost.PFR and we have the tuple iterator. If we combine the two, we might have a way of applying std algorithms over structs. Does a solution already exist? What I'm looking for is:

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ANSWER

Answered 2021-Apr-10 at 15:38

You can already have the existing functionality with pfr::structure_tie, which results in a tuple of references.

This would allow us to use the newer features to process structs out of sequence or in parallel.

That would only make sense if processing per element has considerable execution cost. In that case, you're probably already fine with a bespoke

Source https://stackoverflow.com/questions/67033605

QUESTION

How to parse xml-string(not a file) without namespace in Python 3.7.3?

Asked 2021-Feb-08 at 15:48

I'm conveting string to xml. How to parse a XML without namespace? Maybe you can advise other libs for working with XML-string?

Here is my code:

...

ANSWER

Answered 2021-Feb-08 at 15:48

The following code will allow you to read the entire xml without using namespace schema:

Source https://stackoverflow.com/questions/66103482

QUESTION

FFMPEG - Apple 720p30 Surround MP4 H.264 AAC stereo; Dolby Digital

Asked 2020-Dec-10 at 19:49

i would like the FFmpeg cli settings which will match this (this is a handbrake preset)

Here is the presetting file, I dont understand what these would be for ffmpeg.

...

ANSWER

Answered 2020-Dec-10 at 19:49

ffmpeg -i input.mp4 -c:v libx264 -crf 21 -preset medium -vf scale=-2:720 -r 30 -c:a aac -ac 2 output.mp4

Source https://stackoverflow.com/questions/65236330

QUESTION

ImageDataGenerator for multi task output in Keras using flow_from_directory

Asked 2020-Mar-11 at 12:49

I am creating a multitask CNN model and I have two different classification properties (one with 10 classes, 2nd with 5 classes) and my directory structure looks like this:

...

ANSWER

Answered 2020-Mar-11 at 10:46

You can use flow_from_dataframe. You just need to parse your csv files containing the labels into a pandas dataframe which maps the filenames to their corresponding labels.

For instance, if dataframe looks like:

Source https://stackoverflow.com/questions/60621008

QUESTION

How to run the subquery with the non equality clause on Spark?

Asked 2020-Feb-13 at 19:41

I have this query and I want to execute it on spark

...

ANSWER

Answered 2020-Feb-13 at 17:01

Just use rank():

Source https://stackoverflow.com/questions/60213053

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install pfr

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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