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Add an etl::nullptr_t type to <etl/nullptr.h> #924

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merged 7 commits into from
Jul 19, 2024
Merged

Add an etl::nullptr_t type to <etl/nullptr.h> #924

merged 7 commits into from
Jul 19, 2024

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tigran2008
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@tigran2008 tigran2008 commented Jul 17, 2024 •
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Well, the title is self-explanatory. This is a tiny change anyway, and the code is basically what's proposed in #922.

Edit: As of this moment, I changed the pre-C++11 code from an enum into a custom class

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Review changes with SemanticDiff.

@tigran2008
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I'm so sorry for the mistakes, I'm a total beginner to C++ and I'm trying my best :/

@tigran2008
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After I'm done, I promise I'll squash the commits 😅

@jwellbelove
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You can run the unit tests locally if you want to check before you push, though it does take some time to do all C++11/14/17/20 variants.

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tigran2008 commented Jul 17, 2024 •
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Do you think this implementation of etl::nullptr_t is acceptable? It instantiates a _nullptr instance beforehand, and it occupies one byte of storage, unlike the previous one, which didn't occupy any (without usage). I could also do #define ETL_NULLPTR (etl::nullptr()) but I thought it wouldn't be good to instantiate a new object everywhere a nullptr is used..

Also, if you do think it's an acceptable solution, do you think I should add a (void)_nullptr; // silence unused warning? I didn't get an unused variable warning on my computer (gcc version 13.3.1 20240522 (Red Hat 13.3.1-1) (GCC) on Fedora 39) but I just noticed that it warns on https://cpp.sh

tigran2008 and others added 2 commits July 17, 2024 17:00
@tigran2008
etlcpp/etl issue #921 (etl::unique_ptr reset): add etl::unique_ptr(..…
af40b7f 
….)::reset(ETL_NULLPTR)

Remove default argument for the normal reset method of etl::unique_ptr (sorry, didn't notice 😬)

Silence the unused argument warning

Fix operator =(nullptr)

Replace the nullptr_t enum with a class which acts more similar to C++11 nullptr
@tigran2008
Add member pointer support and delete the addressof operator
ec0938c
@tigran2008
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Do you think I should also delete etl::addressof(ETL_NULLPTR)?

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Well, I'll be waiting for a comment from you before squashing the commits

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I'll have a look tomorrow.

jwellbelove
jwellbelove reviewed Jul 18, 2024
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include/etl/memory.h Outdated Show resolved Hide resolved
@jwellbelove jwellbelove changed the base branch from master to pull-request/#924-Add-an-etl--nullptr_t-type-to-etl-nullptr.h July 19, 2024 16:20
@jwellbelove jwellbelove merged commit 22dc6b2 into ETLCPP:pull-request/#924-Add-an-etl--nullptr_t-type-to-etl-nullptr.h Jul 19, 2024
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jwellbelove pushed a commit that referenced this pull request Jul 25, 2024
Merge branch 'pull-request/#924-Add-an-etl--nullptr_t-type-to-etl-nul…
5885433 
…lptr.h' into development
jwellbelove pushed a commit that referenced this pull request Jul 28, 2024
@tigran2008
Add an etl::nullptr_t type to <etl/nullptr.h> (#924)
c9c0109 
* Add an etl::nullptr_t type

* etlcpp/etl issue #921 (etl::unique_ptr reset): add etl::unique_ptr(...)::reset(ETL_NULLPTR)

Remove default argument for the normal reset method of etl::unique_ptr (sorry, didn't notice 😬)

Silence the unused argument warning

Fix operator =(nullptr)

Replace the nullptr_t enum with a class which acts more similar to C++11 nullptr

* Add member pointer support and delete the addressof operator

* "Delete" etl::addressof(ETL_NULLPTR)

* Ensure compatibility with C++98

* ACTUALLY ensure compatibility with C++98

I'm stupid :/

* Correct definition according to cppreference
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