scope_guard | Scope Guard & Defer C++ | Command Line Interface library

by Neargye C++ Version: v0.9.1 License: MIT

X-Ray Key Features Code Snippets(1)Community Discussions(1)Vulnerabilities Install Support

kandi X-RAY | scope_guard Summary

scope_guard is a C++ library typically used in Utilities, Command Line Interface, Nodejs applications. scope_guard has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Scope Guard statement invokes a function with deferred execution until surrounding function returns in cases:. Program control transferring does not influence Scope Guard statement execution. Hence, Scope Guard statement can be used to perform manual resource management, such as file descriptors closing, and to perform actions even if an error occurs.

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Support

scope_guard has a low active ecosystem.

It has 103 star(s) with 14 fork(s). There are 5 watchers for this library.

It had no major release in the last 12 months.

scope_guard has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of scope_guard is v0.9.1

Quality

scope_guard has 0 bugs and 0 code smells.

Security

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

scope_guard code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

scope_guard is licensed under the MIT License. This license is Permissive.

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

Reuse

scope_guard releases are available to install and integrate.

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

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scope_guard Key Features

No Key Features are available at this moment for scope_guard.

scope_guard Examples and Code Snippets

default

C++

Lines of Code : 8

License : Permissive (MIT)

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| (___   ___ ___  _ __   ___  | |  __ _   _  __ _ _ __ __| | | |   _| |_ _| |_
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Community Discussions

Trending Discussions on scope_guard

C++ scope guard with zero overhead

QUESTION

C++ scope guard with zero overhead

Asked 2022-Jan-20 at 17:50

In C++ we can ensure foo is called when we exit a scope by putting foo() in the destructor of a local object. That's what I think of when I head "scope guard." There are plenty of generic implementations.

I'm wondering—just for fun—if it's possible to achieve the behavior of a scope guard with zero overhead compared to just writing foo() at every exit point.

Zero overhead, I think:

...

ANSWER

Answered 2021-Nov-18 at 23:45

It's not exactly clear what you mean by 'zero overhead' here.

Do compilers optimize away giving sg an address?

Most likely modern mainstream compilers will do it when run in optimizing modes. Unfortunately, that's as much definite as it can get. It depends on the environment and has to be tested to be relied upon.

If the question is if there is a guaranteed way to avoid in the resulting assembly, the answer is negative. As @Peter said in the comment, compiler is allowed to do anything to produce the equivalent result. It may not ever call foo() at all, even if you write it there verbatim - when it can prove that nothing in the observed program behavior will change.

Source https://stackoverflow.com/questions/70026688

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

Vulnerabilities

No vulnerabilities reported

Install scope_guard

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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