Cpp20 | This is code repository for my book C20 | Learning library

by RainerGrimm C++ Version: Current License: No License

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kandi X-RAY | Cpp20 Summary

Cpp20 is a C++ library typically used in Tutorial, Learning applications. Cpp20 has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

This is the code repository for my book C++20 - Get the Details. It has more than 200 running examples. The names of the directories reflect the names of the chapters in the book. I put the name of the source file in the title of each source code example.

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Cpp20 has a low active ecosystem.

It has 24 star(s) with 3 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

There are 0 open issues and 1 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of Cpp20 is current.

Quality

Cpp20 has no bugs reported.

Security

Cpp20 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

Cpp20 does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

Cpp20 releases are not available. You will need to build from source code and install.

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Cpp20 Key Features

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Cpp20 Examples and Code Snippets

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Community Discussions

Trending Discussions on Cpp20

Calculate CRC for File(content)

Partial specialization of templates over non-type literal parameters in C++20: clang and gcc disagree

Can you use constraints on derived classes in CRTP methods?

Concept with multiple template arguments

QUESTION

Calculate CRC for File(content)

Asked 2021-Jun-13 at 17:26

TLDR: Create a CRC from every file(contentbased) in Directory.
Currently i used from Cpp20 the Filesystem Libary and tried to create a checksum for a file with "hash_value(p)". The thing is, the value does not change. Can you provide me some advice ho to accomplish a checksum, that changes when file content is changed. I would like to stay within the range of CPP libarys or what debian 10 can provide.
Now i tried this:

...

ANSWER

Answered 2021-Jun-12 at 16:59

The thing is, the value does not change.

It's not supposed to. The filesystem::hash_value is a hash of the path to the file, not the contents of the file. If you want to compute a CRC of the contents of a file, you're going to have to read those contents and apply a CRC algorithm to them.

Source https://stackoverflow.com/questions/67950990

QUESTION

Partial specialization of templates over non-type literal parameters in C++20: clang and gcc disagree

Asked 2021-Mar-22 at 11:05

Toying around with literal, non-type template parameters in c++20, I found out that g++ and clang++ disagree about the following code.

...

ANSWER

Answered 2021-Mar-22 at 11:05

Let's focus on the partial specialization of is_named:

Source https://stackoverflow.com/questions/66731338

QUESTION

Can you use constraints on derived classes in CRTP methods?

Asked 2021-Feb-26 at 20:54

Is something like this valid C++20 code?

...

ANSWER

Answered 2021-Feb-26 at 20:54

As Barry mentioned, the code is valid and this is Clang bug 44833.

In the meantime, I was able to work around the issue by writing the code like this (demo):

Source https://stackoverflow.com/questions/66217479

QUESTION

Concept with multiple template arguments

Asked 2020-Apr-26 at 16:17

I'm trying to use C++20 concepts, to start familiarizing with them. I feel pretty comfortable with easy concepts, for example with the standard concept movable I can write something like this (in all examples I suppose I'm using namespace std and I included and any other header needed):

...

ANSWER

Answered 2020-Apr-26 at 16:17

But what is the formal rule behind this form?

The rule (that you correctly guessed your way into) is described in [temp.param]/4:

A type-constraint Q that designates a concept C can be used to constrain a contextually-determined type or template type parameter pack T with a constraint-expression E defined as follows. If Q is of the form C, then let E′ be C. Otherwise, let E′ be C. If T is not a pack, then E is E′, otherwise E is (E′ && ...). This constraint-expression E is called the immediately-declared constraint of Q for T. The concept designated by a type-constraint shall be a type concept ([temp.concept]).

With examples in the subsequent paragraph:

A type-parameter that starts with a type-constraint introduces the immediately-declared constraint of the type-constraint for the parameter. [ Example:

Source https://stackoverflow.com/questions/61444020

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

Vulnerabilities

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Install Cpp20

You can download it from GitHub.

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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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