self_cell | use proc-macro-free self | Reflection library

by Voultapher Rust Version: v1.0.0 License: Apache-2.0

X-Ray Key Features Code Snippets(3)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | self_cell Summary

self_cell is a Rust library typically used in Programming Style, Reflection applications. self_cell has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Use the macro-rules macro: self_cell! to create safe-to-use self-referential structs in stable Rust, without leaking the struct internal lifetime.

Support

Quality

Security

License

Reuse

Support

self_cell has a low active ecosystem.

It has 178 star(s) with 10 fork(s). There are 7 watchers for this library.

It had no major release in the last 12 months.

There are 1 open issues and 21 have been closed. On average issues are closed in 23 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of self_cell is v1.0.0

Quality

self_cell has 0 bugs and 0 code smells.

Security

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

self_cell code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

self_cell is licensed under the Apache-2.0 License. This license is Permissive.

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

Reuse

self_cell releases are available to install and integrate.

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

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self_cell Key Features

No Key Features are available at this moment for self_cell.

self_cell Examples and Code Snippets

A motivating use case

Rust

Lines of Code : 39

License : Permissive (Apache-2.0)

Copy

use self_cell::self_cell;

#[derive(Debug, Eq, PartialEq)]
struct Ast<'a>(pub Vec<&'a str>);

self_cell!(
    struct AstCell {
        owner: String,

        #[covariant]
        dependent: Ast,
    }

    impl {Debug, Eq, PartialEq}

self_cell!

Rust

Lines of Code : 27

License : Permissive (Apache-2.0)

Copy

// User code:

self_cell!(
    struct NewStructName {
        owner: Owner,

        #[covariant]
        dependent: Dependent,
    }
    
    impl {Debug}
);

// Generated by macro:

struct NewStructName(...);

impl NewStructName {
    fn new(

Fast compile times

Rust

Lines of Code : 4

License : Permissive (Apache-2.0)

Copy

$ rm -rf target && cargo +nightly build -Z timings

Compiling self_cell v0.9.0
Completed self_cell v0.9.0 in 0.2s

Community Discussions

Trending Discussions on Reflection

NotNullAttribute missing when checking by reflection

golang how to access promoted type

java ModuleLayer : ModuleLayer.Controller add methods don't work

PropertyInfo.GetValue on Boolean is always True, how to handle False responses

How to detect the length of array property using reflection only if it actually is an array?

How to check if one ParameterizedType represents a sub-type of another ParameterizedType?

Powershell generate System.Type out of String

How do I get all Record fields and its values via reflection in Java 17?

How to unit test an internal method or private method in an abstract class in c#?

enable templated base class only for derived classes

QUESTION

NotNullAttribute missing when checking by reflection

Asked 2022-Feb-16 at 15:15

What we are trying to do is to list all properties of the class with NotNull attribute. The one from .NET, not from JetBrains. Unfortunately, it looks like NotNullAttribute is removed during the compilation process (or on some other stage) and it can't be observed in the runtime.

Does anyone know why does it happen? Can't find an explanation on the internet/MSDN.

Here is a test that can easily reproduce it. It fails on the second assertion.

...

ANSWER

Answered 2022-Feb-16 at 15:15

If you use SharpLab you can see in the lowered code that the attribute is indeed removed from the property, and instead is applied to the return parameter:

Source https://stackoverflow.com/questions/71144165

QUESTION

golang how to access promoted type

Asked 2022-Feb-01 at 09:48

I have a 'common' structure promoted within two specific structures. For example:

...

ANSWER

Answered 2022-Jan-31 at 22:56

You don't need reflection. One way is to use an interface:

Source https://stackoverflow.com/questions/70933451

QUESTION

java ModuleLayer : ModuleLayer.Controller add methods don't work

Asked 2022-Jan-13 at 15:28

I am using Netbeans 12.5 and java 16

In an Java Modular Project I have 2 Modules

...

ANSWER

Answered 2021-Nov-12 at 11:19

You are creating a new module layer containing two modules and establishing access of one of these modules to the other. However, you actually want to establishing access for the currently running main method to one the these modules.

The currently running main method can’t be part of the new module layer it just creates. Assuming standard launcher setup, it belongs to a Controller module loaded by the system class loader as part of the boot-layer.

So, instead of granting access to a new module of the same name in the new layer, you have to change the code to grant access to the already loaded Controller module. Since the new Controller module of the new module layer serves no purpose then, you can remove it from the layer configuration.

Source https://stackoverflow.com/questions/69932308

QUESTION

PropertyInfo.GetValue on Boolean is always True, how to handle False responses

Asked 2022-Jan-10 at 14:59

Similar to PropertyInfo.GetValue on Boolean is always True although no useful answer was posted.

I'm using Entity Framework to gather objects from a database and I'm trying to create Json structures as strings. However when gathering boolean answers in the same way as other types, the boolean always returns true.

I've tried to cast the value to a boolean here but I originally tried using the same method as other types (just using value). Is there a reason for this or a fix? Thanks

...

ANSWER

Answered 2022-Jan-10 at 14:04

The premise of the question is incorrect; PropertyInfo.GetValue works just fine - here used with your method with zero changes:

Source https://stackoverflow.com/questions/70652960

QUESTION

How to detect the length of array property using reflection only if it actually is an array?

Asked 2022-Jan-02 at 11:43

I'm converting an object based on reflection like this.

...

ANSWER

Answered 2022-Jan-01 at 18:01

I can't think of a solution that's significantly different to yours, fundamentally it feels like it's a custom logic to determine whether a property value is "empty" or not.

Perhaps a pattern matched switch expression might make the code a little cleaner, however, for example:

Source https://stackoverflow.com/questions/70550456

QUESTION

How to check if one ParameterizedType represents a sub-type of another ParameterizedType?

Asked 2021-Nov-27 at 11:55

Given below code snippet, for each field of POJO class, is there a way to check if the type is an integer list or not? The real problem here is the type argument, since it's quite easy to check if it's a list via instanceof or isAssignableFrom.

Lines in main is what I have found so far, but it does not work for those types with more complex class hierarchy.

...

ANSWER

Answered 2021-Nov-26 at 10:50

You are right, this is not an easy problem because of erasure. However, I think it is not unsolvable.

The fundamental principle should be to follow and replace the type variables with actual parameter types all the way to List.

Consider these two classes:

Source https://stackoverflow.com/questions/70105878

QUESTION

Powershell generate System.Type out of String

Asked 2021-Nov-04 at 19:41

I am dynamically generating .net objects of a certain type like this $MyType=([System.Type]::GetType("System.String") This works fine for standard .net objects.

I now created a custom class like this

...

ANSWER

Answered 2021-Nov-04 at 16:14

Use the -as type conversion operator:

Source https://stackoverflow.com/questions/69842375

QUESTION

How do I get all Record fields and its values via reflection in Java 17?

Asked 2021-Oct-15 at 15:45

I had a class:

...

ANSWER

Answered 2021-Oct-13 at 10:58

Your class and record aren't equivalent: records have private fields.

Class#getFields() returns public fields only.

You could use Class#getDeclaredFields() instead.

Source https://stackoverflow.com/questions/69554180

QUESTION

How to unit test an internal method or private method in an abstract class in c#?

Asked 2021-Sep-04 at 09:26

I have to write a unit test for an internal or private method in an abstract class in c#. consider this:

...

ANSWER

Answered 2021-Sep-04 at 03:12

You need to specify the BindingFlags to be NonPublic in order to find the private method.

I am not sure what is the PrivateObject but this should work (you may change it a little bit to make it suitable for your needs):

Source https://stackoverflow.com/questions/69051979

QUESTION

enable templated base class only for derived classes

Asked 2021-Aug-29 at 08:59

How would I go about doing the equivalent of the following?

...

ANSWER

Answered 2021-Aug-29 at 08:59

In CRTP, T is incomplete in class MyClass : Self {};.

You can add an extra check in a method which should be called/instantiated (such as constructor/destructor):

Source https://stackoverflow.com/questions/68969652

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

Vulnerabilities

No vulnerabilities reported

Install self_cell

You can download it from GitHub.
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.