[jira] [Created] (MINIFICPP-1306) Replace header guards with #pragma once

["Adam Hunyadi (Jira)" <ji...@apache.org>]

Adam Hunyadi created MINIFICPP-1306:
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             Summary: Replace header guards with #pragma once
                 Key: MINIFICPP-1306
                 URL: https://issues.apache.org/jira/browse/MINIFICPP-1306
             Project: Apache NiFi MiNiFi C++
          Issue Type: Task
    Affects Versions: 0.7.0
            Reporter: Adam Hunyadi
             Fix For: 1.0.0


*Background:*

The team decided to replace header guards with {{{color:#403294}{{#pragma once}}{color}}} once. It is not standardized, but all the compilers we support have it, and we already have it scattered in our headers, so we can consider this update safe.

*Proposal:*

It should be easy to replace the header guards based on the linter recommendations. Once we have all the linter warnings enabled, [[this function from cpplint]|https://github.com/cpplint/cpplint/blob/1.5.3/cpplint.py#L2286] can be used to find the header guard string and replaced in the {{{color:#403294}{{#ifndef}}{color}}} and {{{color:#403294}{{#define}}{color}}} and matching {{{color:#403294}{{#endif}}{color}}}.



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