mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
#ifndef SPROUT_WORKAROUND_RECURSIVE_FUNCTION_TEMPLATE_HPP
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#define SPROUT_WORKAROUND_RECURSIVE_FUNCTION_TEMPLATE_HPP
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#include <stdexcept>
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#include <sprout/config.hpp>
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#include <sprout/utility/forward.hpp>
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#include <sprout/utility/any_convertible.hpp>
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#include <sprout/type_traits/enabler_if.hpp>
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#include <sprout/preprocessor/stringize.hpp>
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//
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// SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_LIMIT
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//
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#ifndef SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_LIMIT
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# if defined(__clang__)
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# if (__clang_major__ < 3 || (__clang_major__ == 3 && __clang_major__ <= 2))
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# define SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_LIMIT 512
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# else
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# define SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_LIMIT 256
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# endif
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# else
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# define SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_LIMIT 512
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# endif
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#endif
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//
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// SPROUT_RECURSIVE_FUNCTION_TEMPLATE_CONTINUE_DECL
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// SPROUT_RECURSIVE_FUNCTION_TEMPLATE_BREAK_DECL
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//
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#define SPROUT_RECURSIVE_FUNCTION_TEMPLATE_CONTINUE_DECL(depth) \
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typename sprout::enabler_if<((depth) < SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_LIMIT - 1)>::type
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#define SPROUT_RECURSIVE_FUNCTION_TEMPLATE_BREAK_DECL(depth) \
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typename sprout::enabler_if<((depth) >= SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_LIMIT - 1)>::type
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//
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// SPROUT_RECURSIVE_FUNCTION_TEMPLATE_CONTINUE
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// SPROUT_RECURSIVE_FUNCTION_TEMPLATE_BREAK
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//
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#define SPROUT_RECURSIVE_FUNCTION_TEMPLATE_CONTINUE(depth) \
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SPROUT_RECURSIVE_FUNCTION_TEMPLATE_CONTINUE_DECL(depth) = sprout::enabler
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#define SPROUT_RECURSIVE_FUNCTION_TEMPLATE_BREAK(depth) \
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SPROUT_RECURSIVE_FUNCTION_TEMPLATE_BREAK_DECL(depth) = sprout::enabler
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//
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// SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_EXCEEDED_MESSAGE
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//
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#define SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_EXCEEDED_MESSAGE \
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"recursive template instantiation exceeded maximum depth of " SPROUT_PP_STRINGIZE(SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_LIMIT)
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namespace sprout {
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//
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// recursive_function_template_instantiation_exeeded
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//
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class recursive_function_template_instantiation_exeeded
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: public std::runtime_error
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{
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public:
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recursive_function_template_instantiation_exeeded() SPROUT_NOEXCEPT
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: std::runtime_error(SPROUT_RECURSIVE_FUNCTION_TEMPLATE_INSTANTIATION_EXCEEDED_MESSAGE)
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{}
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};
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//
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// throw_recursive_function_template_instantiation_exeeded
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//
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template<typename T = sprout::any_convertible>
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inline SPROUT_CONSTEXPR T
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throw_recursive_function_template_instantiation_exeeded() {
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return throw sprout::recursive_function_template_instantiation_exeeded(), T();
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}
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template<typename T>
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inline SPROUT_CONSTEXPR T&&
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throw_recursive_function_template_instantiation_exeeded(T&& t) {
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return throw sprout::recursive_function_template_instantiation_exeeded(), sprout::forward<T>(t);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_WORKAROUND_RECURSIVE_FUNCTION_TEMPLATE_HPP
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