GCC 4.8.0 - 7.0 has a bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480) involving specialization in a namespace enclosing the specialized template. This PR fixes an appearance of this bug in the span header.
Both checks for Expects(ExtentType::size() != dynamic_extent); in storage_type are always useless. storage_type<ExtentType> is only ever created with ExtentType == extent_type<Extent>, where Extent has type std::size_t and is the extent of the span.
Looking at extent_type<std::size_t Ext>::size():
- if Ext != dynamic_extent, then size() always returns Ext, and therefore size() != dynamic_extent
- if Ext == dynamic_extent, then size() returns extent_type<dynamic_extent>::size_. size_ can only be set via one of two constructors:
- constexpr explicit extent_type(size_type size), which already does the check in question
- constexpr explicit extent_type(extent_type<Other> ext) : size_(ext.size()), which simply relies on the other extent's size() method
So there is no way for ExtentType::size() == dynamic_extent.
[SF.12: Prefer the quoted form of #include for files relative to the including file and the angle bracket form everywhere else](https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#Rs-incform)
Additionally changed #include order in `span` so that all `span_ext` is in the GSL include block and not in the STL include block.
Fixes issues #1025.
Co-authored-by: Werner Henze <w.henze@avm.de>
* move span specialization of 'at' to <gsl/span> and update the parameter to be taken by reference
* undid previous changes and acted upon decisions made in maintainer sync. Fixed tests failing in /kernel mode
* ran clang-format on the include folder
* ran clang-format on the test folder
Co-authored-by: Jordan Maples <jordan.maples@microsoft.com>
* Azure pipeline (#8)
* azure-pipeline test
* nl @ eof
* trimming the pipeline and adding debug steps
* removing redundant lines
* change ctest to script cmd and remove debug
* removed bad char
* added dir change for ctest
* explicit output file and cmake standard
* test cat
* more ctest tests
* injecting failure in test for validation
* another test
* removing bad test
* massive matrix
* added parallel
* commenting everything but xcode out for testing purposes
* uncomment the other tests
* testing some variables
* rename
* changed macos versions
* adding one more layer of templates
* fixing jobs.yml
* idk what i'm doing
* slight modifications
* maybe some spaces will help
* removing 'variables.'
* another test
* adding back pr w/ autocancel
* adding failing test to validate error = failing task
* remove failing test
* trigger master
* nl in steps.yml
* remove forced decay of array reference to pointer in span array ctor
- suppress " warning C26481: Don't use pointer arithmetic. Use span instead (bounds.1)."
- Please note that the suppression in `end()` does not work with MSVC 16.5.4.
VS 2019 doesn't seem to match -1 for size_t template parameter, as a result dynamic span/basic_string_span/basic_zstring_span show extent as `extent = 4294967295` (for 32-bit builds). This change updates details::extent_type to have static constexpr size_ parameter for non-dynamic span/basic_string_span/basic_zstring_span and simplifies/removes dynamic versions from GSL.natvis
fixes#856
