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add optional compile time check #379

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add optional compile time check #379

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b1dbe11
add optional compile time check
dyollb Jan 3, 2022
cace6fd
rename preprocessor macro
dyollb Jan 3, 2022
ef09423
fix: use different typedef to avoid compile error
dyollb Jan 4, 2022
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5 changes: 5 additions & 0 deletions include/boost/python/args_fwd.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,11 @@ namespace detail
{
typedef char too_many_keywords[keywords > function_args ? -1 : 1];
};
template <int keywords, int function_args>
struct less_keywords_than_function_arguments
{
typedef char too_few_keywords[(keywords!=0 && keywords < function_args) ? -1 : 1];
};
}
}

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8 changes: 7 additions & 1 deletion include/boost/python/make_function.hpp
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Expand Up @@ -56,7 +56,13 @@ namespace detail
typedef typename detail::error::more_keywords_than_function_arguments<
NumKeywords::value, arity
>::too_many_keywords assertion BOOST_ATTRIBUTE_UNUSED;


#ifdef BOOST_PYTHON_NUM_KEYWORDS_EQUALS_ARITY
typedef typename detail::error::less_keywords_than_function_arguments<
NumKeywords::value, arity
>::too_few_keywords assertion2 BOOST_ATTRIBUTE_UNUSED;
#endif

return objects::function_object(
detail::caller<F,CallPolicies,Sig>(f, p)
, kw);
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