view.hpp

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// Copyright 2009-present MongoDB, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#pragma once
 
#include <cstddef>
#include <cstdint>
#include <type_traits>
 
#include <bsoncxx/document/element-fwd.hpp>
#include <bsoncxx/types/bson_value/value-fwd.hpp>
#include <bsoncxx/types/bson_value/view-fwd.hpp>
 
#include <bsoncxx/stdx/type_traits.hpp>
#include <bsoncxx/types.hpp>
 
#include <bsoncxx/config/prelude.hpp>
 
namespace bsoncxx {
namespace detail {
 
template <typename T>
using is_bson_view_compatible =
    detail::conjunction<std::is_constructible<bsoncxx::v_noabi::types::bson_value::view, T>,
                        detail::negation<detail::disjunction<
                            detail::is_alike<T, bsoncxx::v_noabi::types::bson_value::view>,
                            detail::is_alike<T, bsoncxx::v_noabi::types::bson_value::value>>>>;
 
}  // namespace detail
}  // namespace bsoncxx
 
namespace bsoncxx {
namespace v_noabi {
namespace types {
namespace bson_value {
class view {
   public:
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_double v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_string v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_document v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_array v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_binary v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_undefined v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_oid v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_bool v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_date v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_null v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_regex v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_dbpointer v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_code v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_symbol v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_codewscope v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_int32 v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_timestamp v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_int64 v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_decimal128 v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_maxkey v) noexcept;
    explicit BSONCXX_ABI_EXPORT_CDECL() view(b_minkey v) noexcept;
 
    BSONCXX_ABI_EXPORT_CDECL() view() noexcept;
 
    BSONCXX_ABI_EXPORT_CDECL() view(const view&) noexcept;
    BSONCXX_ABI_EXPORT_CDECL(view&) operator=(const view&) noexcept;
 
    BSONCXX_ABI_EXPORT_CDECL() ~view();
 
    friend BSONCXX_ABI_EXPORT_CDECL(bool) operator==(const bson_value::view&,
                                                     const bson_value::view&);
    friend BSONCXX_ABI_EXPORT_CDECL(bool) operator!=(const bson_value::view&,
                                                     const bson_value::view&);
 
    BSONCXX_ABI_EXPORT_CDECL(bsoncxx::v_noabi::type) type() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_double&) get_double() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_string&) get_string() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_document&) get_document() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_array&) get_array() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_binary&) get_binary() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_undefined&) get_undefined() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_oid&) get_oid() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_bool&) get_bool() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_date&) get_date() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_null&) get_null() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_regex&) get_regex() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_dbpointer&) get_dbpointer() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_code&) get_code() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_symbol&) get_symbol() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_codewscope&) get_codewscope() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_int32&) get_int32() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_timestamp&) get_timestamp() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_int64&) get_int64() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_decimal128&) get_decimal128() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_minkey&) get_minkey() const;
 
    BSONCXX_ABI_EXPORT_CDECL(const b_maxkey&) get_maxkey() const;
 
   private:
    friend ::bsoncxx::v_noabi::types::bson_value::value;
    friend ::bsoncxx::v_noabi::document::element;
 
    view(const std::uint8_t* raw, std::uint32_t length, std::uint32_t offset, std::uint32_t keylen);
    view(void* internal_value) noexcept;
 
    void _init(void* internal_value) noexcept;
 
    void destroy() noexcept;
 
    bsoncxx::v_noabi::type _type;
 
    union {
        struct b_double _b_double;
        struct b_string _b_string;
        struct b_document _b_document;
        struct b_array _b_array;
        struct b_binary _b_binary;
        struct b_undefined _b_undefined;
        struct b_oid _b_oid;
        struct b_bool _b_bool;
        struct b_date _b_date;
        struct b_null _b_null;
        struct b_regex _b_regex;
        struct b_dbpointer _b_dbpointer;
        struct b_code _b_code;
        struct b_symbol _b_symbol;
        struct b_codewscope _b_codewscope;
        struct b_int32 _b_int32;
        struct b_timestamp _b_timestamp;
        struct b_int64 _b_int64;
        struct b_decimal128 _b_decimal128;
        struct b_minkey _b_minkey;
        struct b_maxkey _b_maxkey;
    };
};
 
 
template <typename T>
detail::requires_t<bool, detail::is_bson_view_compatible<T>>  //
operator==(const bson_value::view& lhs, T&& rhs) {
    return lhs == bson_value::view{std::forward<T>(rhs)};
}
 
template <typename T>
detail::requires_t<bool, detail::is_bson_view_compatible<T>>  //
operator==(T&& lhs, const bson_value::view& rhs) {
    return bson_value::view{std::forward<T>(lhs)} == rhs;
}
 
template <typename T>
detail::requires_t<bool, detail::is_bson_view_compatible<T>>  //
operator!=(const bson_value::view& lhs, T&& rhs) {
    return lhs != bson_value::view{std::forward<T>(rhs)};
}
 
template <typename T>
detail::requires_t<bool, detail::is_bson_view_compatible<T>>  //
operator!=(T&& lhs, const bson_value::view& rhs) {
    return bson_value::view{std::forward<T>(lhs)} != rhs;
}
 
 
}  // namespace bson_value
}  // namespace types
}  // namespace v_noabi
}  // namespace bsoncxx
 
namespace bsoncxx {
namespace types {
namespace bson_value {
 
using ::bsoncxx::v_noabi::types::bson_value::operator==;
using ::bsoncxx::v_noabi::types::bson_value::operator!=;
 
}  // namespace bson_value
}  // namespace types
}  // namespace bsoncxx
 
#include <bsoncxx/config/postlude.hpp>
 
 
#if defined(BSONCXX_PRIVATE_DOXYGEN_PREPROCESSOR)
 
namespace bsoncxx {
namespace types {
namespace bson_value {
 
template <typename T>
bool operator==(const v_noabi::types::bson_value::view& lhs, T&& rhs);
 
template <typename T>
bool operator==(T&& lhs, const v_noabi::types::bson_value::view& rhs);
 
template <typename T>
bool operator!=(const v_noabi::types::bson_value::view& lhs, T&& rhs);
 
template <typename T>
bool operator!=(T&& lhs, const v_noabi::types::bson_value::view& rhs);
 
}  // namespace bson_value
}  // namespace types
}  // namespace bsoncxx
 
#endif  // defined(BSONCXX_PRIVATE_DOXYGEN_PREPROCESSOR)