The current detection method fails on GCC 12.2 with -std=c++20 because
the __cpp_lib_span macro is undefined.
As per https://en.cppreference.com/w/cpp/utility/feature_test ,
__cpp_lib_span requires including either <version> or <span>.
Since both these headers were added in C++20, checking for C++20 is
sufficient (and simpler than using the library feature-test macro).
Signed-off-by: Bernie Innocenti <bernie@codewiz.org>
Co-authored-by: Derek Bailey <derekbailey@google.com>
* [C++] Rename template parameter U in make_span of stl_emulation.h
CPPRESTSDK defines a U macro therefore, calls to U() are problematic.
Rename U to W to avoid conflict.
* [C++] Make typenames of span_convertable and make_span more expressive
Co-authored-by: Derek Bailey <derekbailey@google.com>
std::span lacks these; make the flatbuffers STL emulation and tests
match. This fixes a compile error in C++20 mode when using std::span.
Bug: chromium:1284275
* Allow suppression of including <optional> via macro
* Combine preprocessor conditions
* Make inclusion of header <optional> opt-in
* Make inclusion of <optional> opt-out via macro
* Auto-detect C++17+ when defining macro
* Enclose macro expression in parentheses
* Check value of macro, not whether it's defined
* Fix parentheses
* Don't define macro with expression using other macros
The preprocessor doesn't seem to like it.
* Fix parentheses
* Draft with Array specialization (#5508)
* Array specialization + SFINAE to fold copy-paste (#5508)
* Add implicit specialization of Array<scalar> and Array<struct> (#5508)
- Tag dispatching is used for implicit specialization
- Array<scalar> and Array<struct> have different iterators and accessors
- Array<scalar> and Array<struct> have different Mutate() methods
* Add implicit specialization of Array<scalar> and Array<struct> (#5508)
- Tag dispatching is used for implicit specialization
- Array<scalar> and Array<struct> have different iterators and accessors
- Array<scalar> and Array<struct> have different Mutate() methods
* Refactoring of numbers parser
More accurate parse of float and double.
Hexadecimal floats.
Check "out-of-range" of uint64 fields.
Check correctness of default values and metadata.
* Remove locale-independent code strtod/strtof from PR #4948.
* small optimization
* Add is_(ascii) functions
* is_ascii cleanup
* Fix format conversation
* Refine number parser
* Make code compatible with Android build
* Remove unnecessary suppression of warning C4127
In some debug environments using vector[i] does bounds checking even
though the standard specifies that it should not. Using
*(vector.begin()) sidesteps this though, giving the same result without
the bounds checking.
* Added internal - limited - implementation of flatbuffers::unique_ptr
for STLs that don't ship with std::unique_ptr. In C++11 and beyond
this is just an alias for std::unique_ptr.
* Aliased used type traits structs is_scalar is_floating_point is_unsigned
into flatbuffers namespace so they can be replaced in C++98 implementations.
Right now these point at stlport's TR1 implementations.
* Wrapped vector::data() in vector_data().
* Wrapped vector::emplace_back() in vector_emplace_back().
* Wrapper string::back() in string_back().
* Added variants of FlatBufferBuilder::CreateVector() and
FlatBufferBuilder::CreateVectorOfStructs() that allow the use of plain
function pointers.
Generated code has also been modified to use plain functions to build objects
rather than std::function() so all generated code will work in C++98
applications.
* Added flexbuffers::Builder::Vector(), flexbuffers::Builder::TypedVector()
and flexbuffers::Builder::Map() methods that allow the use of plain function
pointers.
* Changed Parser to internally use plain function pointers when parsing table
and vector delimiters.
* Added specializations of NumToString() for 64-bit types that aren't supported
by stringstream in stlport.
* Overloaded numeric_limits for 64-bit types not supported by stlport.
* Replaced build_apk.sh (which was broken by deprecation of the
"android" tool in the Android SDK) with build.gradle and the
appropriate gradle wrapper to build an APK.
* Switched Android build to build against all STL variants.
* Updated travis configuration to build Android test and sample.
Tested:
* Verified all tests continue to work on Linux, OSX and Android.
* Verified Travis build is green.
Change-Id: I9e634363793f85b9f141d21454b10686020a2065
