mirror of
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98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
/*
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* Copyright (c) 2013-2014, Roland Bock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SQLPP_ANY_H
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#define SQLPP_ANY_H
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#include <sqlpp11/boolean.h>
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#include <sqlpp11/detail/type_set.h>
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namespace sqlpp
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{
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namespace vendor
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{
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template<typename Select>
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struct any_t
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{
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using _traits = make_traits<value_type_of<Select>, ::sqlpp::tag::multi_expression>;
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using _recursive_traits = make_recursive_traits<Select>;
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struct _name_t
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{
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static constexpr const char* _get_name() { return "ANY"; }
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template<typename T>
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struct _member_t
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{
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T any;
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T& operator()() { return any; }
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const T& operator()() const { return any; }
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};
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};
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any_t(Select select):
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_select(select)
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{}
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any_t(const any_t&) = default;
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any_t(any_t&&) = default;
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any_t& operator=(const any_t&) = default;
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any_t& operator=(any_t&&) = default;
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~any_t() = default;
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Select _select;
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};
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}
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namespace vendor
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{
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template<typename Context, typename Select>
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struct serializer_t<Context, vendor::any_t<Select>>
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{
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using T = vendor::any_t<Select>;
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static Context& _(const T& t, Context& context)
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{
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context << "ANY(";
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serialize(t._select, context);
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context << ")";
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return context;
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}
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};
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template<typename T>
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auto any(T t) -> typename vendor::any_t<vendor::wrap_operand_t<T>>
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{
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static_assert(is_select_t<vendor::wrap_operand_t<T>>::value, "any() requires a select expression as argument");
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static_assert(is_expression_t<vendor::wrap_operand_t<T>>::value, "any() requires a single column select expression as argument");
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// FIXME: can we accept non-values like NULL here?
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return { t };
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}
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}
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}
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#endif
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