ce9f305e44
The definition of is_nothrow_invocable in terms of is_convertible and is_nothrow_constructible is incorrect, because a type could have an explicit constructor that means is_nothrow_constructible is true, but implicit conversions could use a different constructor that is potentially-throwing. Fix it by adding a C++11 version of C++20's is_nothrow_convertible that only considers implicit conversions. * include/std/type_traits (__is_nt_convertible_helper): Define it unconditionally, not only for C++20. (__is_nothrow_convertible): Define internal trait for use in C++11. (__is_nt_invocable_impl: Fix by using __is_nothrow_convertible. (is_invocable_r_v, is_nothrow_invocable_r_v): Add missing parameter. * testsuite/20_util/is_nothrow_convertible/value_ext.cc: New test. * testsuite/20_util/is_nothrow_convertible/value.cc: Check with type that has nothrow explicit conversion but potentially-throwing implicit conversion. * testsuite/20_util/is_nothrow_invocable/value.cc: Likewise. * testsuite/20_util/is_nothrow_invocable/value_ext.cc: Fix helper function to only consider implicit conversions. * testsuite/20_util/tuple/cons/noexcept_specs.cc: Add comment. From-SVN: r271171 |
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| ChangeLog | ||
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| config.h.in | ||
| configure | ||
| configure.ac | ||
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file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.