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/*
* This source code is released into the public domain.
*/
module;
#include <cassert>
#include <cstdint>
#include <cstdlib>
#include <expected>
#include <format>
#include <string>
#include <ucl.h>
export module nihil.ucl:boolean;
import :object;
namespace nihil::ucl {
export struct boolean final : object {
using contained_type = bool;
inline static constexpr object_type ucl_type = object_type::boolean;
/*
* Create a boolean holding the value false. Throws std::system_error
* on failure.
*/
boolean();
/*
* Create a boolean holding a specific value. Throws std::system_error
* on failure.
*/
explicit boolean(bool);
/*
* Create a new boolean from a UCL object. Throws type_mismatch
* on failure.
*/
boolean(ref_t, ::ucl_object_t const *uobj);
boolean(noref_t, ::ucl_object_t *uobj);
// Return this object's value.
auto value(this boolean const &self) -> contained_type;
};
/*
* Boolean constructors. These return an error instead of throwing.
*/
export [[nodiscard]] auto
make_boolean(boolean::contained_type = false) -> std::expected<boolean, error>;
/*
* Comparison operators.
*/
export auto operator== (boolean const &a, boolean const &b) -> bool;
export auto operator== (boolean const &a, boolean::contained_type b) -> bool;
export auto operator<=> (boolean const &a, boolean const &b)
-> std::strong_ordering;
export auto operator<=> (boolean const &a, boolean::contained_type b)
-> std::strong_ordering;
} // namespace nihil::ucl
/*
* std::formatter for a boolean. This provides the same format operations
* as std::formatter<bool>.
*/
export template<>
struct std::formatter<nihil::ucl::boolean, char>
{
std::formatter<bool> base_formatter;
template<class ParseContext>
constexpr ParseContext::iterator parse(ParseContext& ctx)
{
return base_formatter.parse(ctx);
}
template<class FmtContext>
FmtContext::iterator format(nihil::ucl::boolean const &o,
FmtContext& ctx) const
{
return base_formatter.format(o.value(), ctx);
}
};
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