Fix append mode double attributes #3
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* Update catch2 to v2.13.9 * Add to changelog * Docs: Catch2 2.13.9+ Co-authored-by: Martin Hořeňovský <martin.horenovsky@gmail.com> Co-authored-by: Axel Huebl <axel.huebl@plasma.ninja>
even if the specified directory does not exist
Needed later for checking file presence in parallel situations
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Sep 7, 2024
* Remove: MPark.Variant (internal)
* CMake: C++17
* Docs: w/o MPark.Variant
* Docs: C++17
* Remove C++14-only Code
* Variant/Option: only `std::variant` as source
* CI: Clang 5->6, GCC 5->7
* Clang6: Ubuntu 20.04
The shipped libstd++ (GCC10?) does not seem to work well with Clang 6
on Ubuntu 18.04 - try again on Ubuntu 20.04.
* clang-tidy-10: namespace & nodiscard
C++17 modernizations that it found:
- `modernize-concat-nested-namespaces`
- `modernize-use-nodiscard`
* macOS: raise deployment target to 10.13
```
error: 'visit<(lambda at ...include/openPMD/backend/Attribute.hpp:239:9),
std::variant<...> &>'
is unavailable: introduced in macOS 10.13
```
`std::filesystem` needs macOS 10.15:
```
share/openPMD/thirdParty/toml11/toml/parser.hpp:2166:65:
error: 'path' is unavailable: introduced in macOS 10.15
basic_value<Comment, Table, Array> parse(const std::filesystem::path& fpath)
^
/Applications/Xcode_13.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/usr/include/c++/v1/filesystem:902:24:
note: 'path' has been explicitly marked unavailable here
class _LIBCPP_TYPE_VIS path {
^
```
* clang6 on Linux: use libc++
Issues with clang 6 on `<variant>` from GCC's libstdc++:
- https://stackoverflow.com/a/46507150/2719194
- https://bugs.llvm.org/show_bug.cgi?id=31852
- https://bugs.llvm.org/show_bug.cgi?id=33222
Using libc++:
- https://libcxx.llvm.org/UsingLibcxx.html
* Add a Clang 7 build
* add libc++abi-dev
* Clang 6: `-Wno-ignored-attributes -Wno-unused-const-variable`
clang-6 has a false positive on `src/auxiliary/Filesystem.cpp`
with `-Wno-ignored-attributes`:
```C++
[[maybe_unused]] MPI_Datatype const MPI_Types< unsigned >::value = MPI_UNSIGNED;
```
Adding only `-Wno-ignored-attributes` then leads to:
```
src/auxiliary/Filesystem.cpp:201:47: error: unused variable 'value' [-Werror,-Wunused-const-variable]
MPI_Datatype const MPI_Types< unsigned >::value = MPI_UNSIGNED;
^
```
* README: C++17 Structure Bindings
Modernize "first read" C++ example with structured bindings
* Doc: Support Clang 7+
For `<variant>`, clang 6 is not to be recommended for C++17 compilation
unless by expert users that know how to change the stdlib.
Thus, let's only recommend Clang 7+.
Ubuntu 18.04 (bionic/oldstable) ships clang 6 by default, but
Ubuntu 20.04 (focal/stable) is already at clang 10.
* C++17: Replace auxiliary::Option with std::optional
* Replace auxiliary::Option with std::optional
* Remove SFINAE in some places (franzpoeschel#3)
* switchType: avoid SFINAE constructs
* Remove template specializations: oldCreateAttribute, oldReadAttribute
* CI fixes
Co-authored-by: Franz Pöschel <franz.poeschel@gmail.com>
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Duplicate of openPMD#1302