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Moved shared result field code into separate file

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This commit is contained in:
rbock 2014-07-30 17:56:33 +02:00
parent a62c660ad5
commit 828106acbd
6 changed files with 108 additions and 156 deletions
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41
include/sqlpp11/boolean.h
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@ -32,6 +32,7 @@
#include <sqlpp11/basic_expression_operators.h>
#include <sqlpp11/type_traits.h>
#include <sqlpp11/exception.h>
#include <sqlpp11/result_field_methods.h>
namespace sqlpp
{
@ -97,46 +98,8 @@ namespace sqlpp
};
template<typename Db, typename FieldSpec>
struct _result_field_t;
// I am SO waiting for concepts lite!
template<typename Field, typename Enable = void>
struct field_methods_t
struct _result_field_t: public result_field_methods_t<_result_field_t<Db, FieldSpec>>
{
static constexpr bool _null_is_trivial = true;
operator _cpp_value_type() const { return static_cast<const Field&>(*this).value(); }
};
template<typename Db, typename FieldSpec>
struct field_methods_t<
_result_field_t<Db, FieldSpec>,
typename std::enable_if<enforce_null_result_treatment_t<Db>::value
and column_spec_can_be_null_t<FieldSpec>::value
and not null_is_trivial_value_t<FieldSpec>::value>::type>
{
static constexpr bool _null_is_trivial = false;
};
template<typename Db, typename FieldSpec>
struct _result_field_t: public field_methods_t<_result_field_t<Db, FieldSpec>>
{
using _field_methods_t = field_methods_t<_result_field_t<Db, FieldSpec>>;
using _traits = make_traits<integral,
tag::is_result_field,
tag::is_expression,
tag_if<tag::null_is_trivial_value, _field_methods_t::_null_is_trivial>>;
struct _recursive_traits
{
using _parameters = std::tuple<>;
using _provided_tables = detail::type_set<>;
using _provided_outer_tables = detail::type_set<>;
using _required_tables = detail::type_set<>;
using _extra_tables = detail::type_set<>;
using _can_be_null = column_spec_can_be_null_t<FieldSpec>;
};
_result_field_t():
_is_valid(false),
_is_null(true),

41
include/sqlpp11/floating_point.h
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@ -31,6 +31,7 @@
#include <sqlpp11/basic_expression_operators.h>
#include <sqlpp11/type_traits.h>
#include <sqlpp11/exception.h>
#include <sqlpp11/result_field_methods.h>
namespace sqlpp
{
@ -96,46 +97,8 @@ namespace sqlpp
};
template<typename Db, typename FieldSpec>
struct _result_field_t;
// I am SO waiting for concepts lite!
template<typename Field, typename Enable = void>
struct field_methods_t
struct _result_field_t: public result_field_methods_t<_result_field_t<Db, FieldSpec>>
{
static constexpr bool _null_is_trivial = true;
operator _cpp_value_type() const { return static_cast<const Field&>(*this).value(); }
};
template<typename Db, typename FieldSpec>
struct field_methods_t<
_result_field_t<Db, FieldSpec>,
typename std::enable_if<enforce_null_result_treatment_t<Db>::value
and column_spec_can_be_null_t<FieldSpec>::value
and not null_is_trivial_value_t<FieldSpec>::value>::type>
{
static constexpr bool _null_is_trivial = false;
};
template<typename Db, typename FieldSpec>
struct _result_field_t: public field_methods_t<_result_field_t<Db, FieldSpec>>
{
using _field_methods_t = field_methods_t<_result_field_t<Db, FieldSpec>>;
using _traits = make_traits<integral,
tag::is_result_field,
tag::is_expression,
tag_if<tag::null_is_trivial_value, _field_methods_t::_null_is_trivial>>;
struct _recursive_traits
{
using _parameters = std::tuple<>;
using _provided_tables = detail::type_set<>;
using _provided_outer_tables = detail::type_set<>;
using _required_tables = detail::type_set<>;
using _extra_tables = detail::type_set<>;
using _can_be_null = column_spec_can_be_null_t<FieldSpec>;
};
_result_field_t():
_is_valid(false),
_is_null(true),

41
include/sqlpp11/integral.h
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@ -33,6 +33,7 @@
#include <sqlpp11/exception.h>
#include <sqlpp11/value_type.h>
#include <sqlpp11/assignment.h>
#include <sqlpp11/result_field_methods.h>
namespace sqlpp
{
@ -97,46 +98,8 @@ namespace sqlpp
};
template<typename Db, typename FieldSpec>
struct _result_field_t;
// I am SO waiting for concepts lite!
template<typename Field, typename Enable = void>
struct field_methods_t
struct _result_field_t: public result_field_methods_t<_result_field_t<Db, FieldSpec>>
{
static constexpr bool _null_is_trivial = true;
operator _cpp_value_type() const { return static_cast<const Field&>(*this).value(); }
};
template<typename Db, typename FieldSpec>
struct field_methods_t<
_result_field_t<Db, FieldSpec>,
typename std::enable_if<enforce_null_result_treatment_t<Db>::value
and column_spec_can_be_null_t<FieldSpec>::value
and not null_is_trivial_value_t<FieldSpec>::value>::type>
{
static constexpr bool _null_is_trivial = false;
};
template<typename Db, typename FieldSpec>
struct _result_field_t: public field_methods_t<_result_field_t<Db, FieldSpec>>
{
using _field_methods_t = field_methods_t<_result_field_t<Db, FieldSpec>>;
using _traits = make_traits<integral,
tag::is_result_field,
tag::is_expression,
tag_if<tag::null_is_trivial_value, _field_methods_t::_null_is_trivial>>;
struct _recursive_traits
{
using _parameters = std::tuple<>;
using _provided_tables = detail::type_set<>;
using _provided_outer_tables = detail::type_set<>;
using _required_tables = detail::type_set<>;
using _extra_tables = detail::type_set<>;
using _can_be_null = column_spec_can_be_null_t<FieldSpec>;
};
_result_field_t():
_is_valid(false),
_is_null(true),

97
include/sqlpp11/result_field_methods.h Normal file
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@ -0,0 +1,97 @@
/*
* Copyright (c) 2013-2014, Roland Bock
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SQLPP_RESULT_FIELD_METHODS_H
#define SQLPP_RESULT_FIELD_METHODS_H
#include <utility>
namespace sqlpp
{
namespace detail
{
template<typename Field>
struct get_field_spec_impl
{
static_assert(wrong_t<Field>::value, "Invalid argument for get_field_spec");
};
template<template<typename, typename> class Field, typename Db, typename FieldSpec>
struct get_field_spec_impl<Field<Db, FieldSpec>>
{
using type = FieldSpec;
};
template<typename Field>
using get_field_spec_t = typename get_field_spec_impl<Field>::type;
}
template<typename Field, typename Enable = void>
struct result_field_methods_base_t
{
using _field_spec_t = detail::get_field_spec_t<Field>;
static constexpr bool _null_is_trivial = true;
operator cpp_value_type_of<_field_spec_t>() const { return static_cast<const Field&>(*this).value(); }
};
template<template<typename, typename> class Field, typename Db, typename FieldSpec>
struct result_field_methods_base_t<
Field<Db, FieldSpec>,
typename std::enable_if<enforce_null_result_treatment_t<Db>::value
and column_spec_can_be_null_t<FieldSpec>::value
and not null_is_trivial_value_t<FieldSpec>::value>::type>
{
using _field_spec_t = FieldSpec;
static constexpr bool _null_is_trivial = false;
};
template<typename Field>
struct result_field_methods_t: public result_field_methods_base_t<Field>
{
using _base_t = result_field_methods_base_t<Field>;
using _field_spec_t = typename _base_t::_field_spec_t;
using _traits = make_traits<value_type_of<_field_spec_t>,
tag::is_result_field,
tag::is_expression,
tag_if<tag::null_is_trivial_value, _base_t::_null_is_trivial>>;
struct _recursive_traits
{
using _parameters = std::tuple<>;
using _provided_tables = detail::type_set<>;
using _provided_outer_tables = detail::type_set<>;
using _required_tables = detail::type_set<>;
using _extra_tables = detail::type_set<>;
using _can_be_null = column_spec_can_be_null_t<_field_spec_t>;
};
using _name_t = typename _field_spec_t::_name_t;
};
}
#endif

41
include/sqlpp11/text.h
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@ -32,6 +32,7 @@
#include <sqlpp11/exception.h>
#include <sqlpp11/concat.h>
#include <sqlpp11/like.h>
#include <sqlpp11/result_field_methods.h>
namespace sqlpp
{
@ -96,46 +97,8 @@ namespace sqlpp
};
template<typename Db, typename FieldSpec>
struct _result_field_t;
// I am SO waiting for concepts lite!
template<typename Field, typename Enable = void>
struct field_methods_t
struct _result_field_t: public result_field_methods_t<_result_field_t<Db, FieldSpec>>
{
static constexpr bool _null_is_trivial = true;
operator _cpp_value_type() const { return static_cast<const Field&>(*this).value(); }
};
template<typename Db, typename FieldSpec>
struct field_methods_t<
_result_field_t<Db, FieldSpec>,
typename std::enable_if<enforce_null_result_treatment_t<Db>::value
and column_spec_can_be_null_t<FieldSpec>::value
and not null_is_trivial_value_t<FieldSpec>::value>::type>
{
static constexpr bool _null_is_trivial = false;
};
template<typename Db, typename FieldSpec>
struct _result_field_t: public field_methods_t<_result_field_t<Db, FieldSpec>>
{
using _field_methods_t = field_methods_t<_result_field_t<Db, FieldSpec>>;
using _traits = make_traits<integral,
tag::is_result_field,
tag::is_expression,
tag_if<tag::null_is_trivial_value, _field_methods_t::_null_is_trivial>>;
struct _recursive_traits
{
using _parameters = std::tuple<>;
using _provided_tables = detail::type_set<>;
using _provided_outer_tables = detail::type_set<>;
using _required_tables = detail::type_set<>;
using _extra_tables = detail::type_set<>;
using _can_be_null = column_spec_can_be_null_t<FieldSpec>;
};
_result_field_t():
_is_valid(false),
_value_ptr(nullptr),

3
include/sqlpp11/type_traits.h
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@ -192,6 +192,9 @@ namespace sqlpp
template<typename T>
using value_type_of = typename detail::value_type_of_impl<T>::type;
template<typename T>
using cpp_value_type_of = typename value_type_of<T>::_cpp_value_type;
template<typename T>
using required_tables_of = typename detail::required_table_of_impl<T>::type;