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Use std::enable_if to enable SFINAE rather than static_assert

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This commit is contained in:
Nick Thompson
2018-10-29 11:58:18 -06:00
parent 6c58aa9a48
commit df7adb52ca
2 changed files with 6 additions and 10 deletions
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12
include/boost/integer/extended_euclidean.hpp
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@ -22,16 +22,12 @@ struct euclidean_result_t {
Z y; Z y;
}; };
using std::numeric_limits;
template<class Z> template<class Z>
euclidean_result_t<Z> extended_euclidean(Z m, Z n) euclidean_result_t<typename std::enable_if<numeric_limits< Z >::is_signed, Z>::type>
extended_euclidean(Z m, Z n)
{ {
using std::numeric_limits;
static_assert(numeric_limits<Z>::is_integer,
"The extended Euclidean algorithm works on integral types.\n");
static_assert(numeric_limits<Z>::is_signed,
"The extended Euclidean algorithm only works on signed integer types.\n");
if (m < 1 || n < 1) if (m < 1 || n < 1)
{ {
BOOST_THROW_EXCEPTION(std::domain_error("Arguments must be strictly positive.\n")); BOOST_THROW_EXCEPTION(std::domain_error("Arguments must be strictly positive.\n"));

4
test/Jamfile.v2
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@ -17,8 +17,8 @@ test-suite integer
[ run integer_mask_test.cpp ] [ run integer_mask_test.cpp ]
[ run static_log2_test.cpp ] [ run static_log2_test.cpp ]
[ run static_min_max_test.cpp ] [ run static_min_max_test.cpp ]
[ run extended_euclidean_test.cpp : : : [ requires cxx11_unified_initialization_syntax ] ] [ run extended_euclidean_test.cpp : : : [ requires cxx11_unified_initialization_syntax sfinae_expr ] ]
[ run mod_inverse_test.cpp : : : [ requires cxx11_unified_initialization_syntax ] ] [ run mod_inverse_test.cpp : : : [ requires cxx11_unified_initialization_syntax sfinae_expr ] ]
[ compile integer_traits_include_test.cpp ] [ compile integer_traits_include_test.cpp ]
[ compile integer_include_test.cpp ] [ compile integer_include_test.cpp ]
[ compile integer_mask_include_test.cpp ] [ compile integer_mask_include_test.cpp ]