scope_exit | simple implementation of Andrei Alexandrescu

by charlesnicholson C++ Version: Current License: Unlicense

X-Ray Key Features Code Snippets Community Discussions(4)Vulnerabilities Install Support

kandi X-RAY | scope_exit Summary

scope_exit is a C++ library. scope_exit has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

A simple implementation of Andrei Alexandrescu's SCOPE_GUARD.

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Quality

Security

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Support

scope_exit has a low active ecosystem.

It has 4 star(s) with 1 fork(s). There are 1 watchers for this library.

It had no major release in the last 6 months.

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

It has a neutral sentiment in the developer community.

The latest version of scope_exit is current.

Quality

scope_exit has 0 bugs and 0 code smells.

Security

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

scope_exit code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

scope_exit is licensed under the Unlicense License. This license is Permissive.

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

Reuse

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

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scope_exit Key Features

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scope_exit Examples and Code Snippets

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Community Discussions

Trending Discussions on scope_exit

How to perform operations like transpose or argmax in tensorflow c api

C++ RAII vs. defer?

Custom STL deleter for any type of resource

c++ add statements to an expression

QUESTION

How to perform operations like transpose or argmax in tensorflow c api

Asked 2021-Sep-29 at 15:09

I have written code base on https://github.com/Neargye/hello_tf_c_api but I have to transpose input tensor and extend its dimensions. On output tensor I have to perform arg_max.

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ANSWER

Answered 2021-Sep-29 at 15:09

Ok, I managed to found the answer by reading this repo.

First you have to create:

Source https://stackoverflow.com/questions/69374743

QUESTION

C++ RAII vs. defer?

Asked 2021-Mar-17 at 16:46

I've recently begun learning C++, previously I programmed in Go.

I was recently informed that I should not be using new because exceptions thrown may cause the allocated memory not to be freed and result in a memory leak. One popular solution to this is RAII, and I found a really good explanation of why to use RAII and what it is here.

However, coming from Go this whole RAII thing seemed unnecessarily complicated. Go has something called defer that solves this problem in a very intuitive way. You just wrap what you want to do when the scope ends in defer(), e.g. defer(free(ptr)) or defer(close_file(f)) and it'll automagically happen at the end of the scope.

I did a search and found two sources that had attempted to implement the defer functionality in C++ here and here. Both ended up with almost exactly the same code, perhaps one of them copied the other. Here they are:

Defer implentation 1:

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ANSWER

Answered 2021-Mar-17 at 15:24

A lot of what you're talking about is opinion-based, so I'm going to start with my own opinions.

In the C++ world, we expect RAII. If you want to get along well with other developers, you're both going to encounter it, and you're going to buck the standard if you decide to do something in a different fashion just because it's what you're accustomed to from Go.

Furthermore, C++ developers don't use FOPEN :-). The C++ standard library includes perfectly good RAII-enabled classes, and we use them. So having to implement RAII really means making proper choices of existing standard classes where possible or making sure your objects are RAII-compatible.

I pretty much never have to redesign my code to implement RAII. My choice of classes handles it automatically.

So while the code you've shown is interesting, it's actually more work than RAII. Every time you use FOPEN, you have to also remember to do your defer thing. Isn't it just so much easier to use std::ifstream or std::ofstream? Then it's already handled for you. (And this can be said about other times where your code would have to implement RAII on the spot. It's already done by picking the right classes.)

So, no, it's not neater and more intuitive, because you have to remember to do it. Pick the right classes, and you don't have to remember.

As for the #defines -- they're just there to make sure your variables have unique names and to shortcut the constructor of the defer class.

Source https://stackoverflow.com/questions/66675899

QUESTION

Custom STL deleter for any type of resource

Asked 2021-Jan-25 at 17:55

I checked many links about custom cleaners like C++ Destructors with Vectors, Pointers, but still didn't find the answer.
For the ones interested in solutions jump to Update 1/2 on the bottom of question. Solutions 1/2 where found during discussion, thanks to active and attentive participants. I want to make a custom automatic deleter for something. Let's look at following sample

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ANSWER

Answered 2021-Jan-25 at 17:55

Summary from comments:

ScopeGuard (as suggested by @IgorTandetnik) and probably what @OP ask

Actual Smart Pointer (as suggested by @RemyLebeau)

std::unique_ptr, deleters and the Win32 API (which only work for pointer type (despite it compiles, see below answer for detail))
One-liner for RAII on non pointer?

The solution from @OP (which is ScopeGuard)

Source https://stackoverflow.com/questions/65873835

QUESTION

c++ add statements to an expression

Asked 2020-Sep-17 at 13:43

There are somecases I have to add statement, like logs or trace to an expression, for example (I wanna log exactly the time for prep_stmt.executeQuery() and still I need its return value):

...

ANSWER

Answered 2020-Sep-17 at 13:21

Maybe better to write a templated wrapper like this:

Source https://stackoverflow.com/questions/63937519

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

Vulnerabilities

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You can download it from GitHub.

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