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Move offset methods into offset classes

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This commit is contained in:
rbock 2014-04-08 21:49:37 +02:00
parent 4727de831f
commit f2fc4f73f6
3 changed files with 44 additions and 50 deletions
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35
include/sqlpp11/select.h
View File

@ -131,7 +131,8 @@ namespace sqlpp
>
struct select_t: public detail::select_helper_t<ColumnList, From>::_value_type::template expression_operators<select_t<Database, FlagList, ColumnList, From, Where, GroupBy, Having, OrderBy, Limit, Offset>>,
Where::template _methods_t<detail::select_policies_t<Database, FlagList, ColumnList, From, Where, GroupBy, Having, OrderBy, Limit, Offset>>,
Limit::template _methods_t<detail::select_policies_t<Database, FlagList, ColumnList, From, Where, GroupBy, Having, OrderBy, Limit, Offset>>
Limit::template _methods_t<detail::select_policies_t<Database, FlagList, ColumnList, From, Where, GroupBy, Having, OrderBy, Limit, Offset>>,
Offset::template _methods_t<detail::select_policies_t<Database, FlagList, ColumnList, From, Where, GroupBy, Having, OrderBy, Limit, Offset>>
{
using _database_t = Database;
using _is_dynamic = typename std::conditional<std::is_same<Database, void>::value, std::false_type, std::true_type>::type;
@ -284,22 +285,6 @@ namespace sqlpp
return { *this, vendor::order_by_t<_database_t, Args...>{args...} };
}
template<typename Arg>
auto offset(Arg arg)
-> _policies_update_t<vendor::no_offset_t, vendor::offset_t<typename vendor::wrap_operand<Arg>::type>>
{
static_assert(is_noop_t<Offset>::value, "cannot call offset()/dynamic_offset() twice");
return { *this, vendor::offset_t<typename vendor::wrap_operand<Arg>::type>{{arg}} };
}
auto dynamic_offset()
-> _policies_update_t<vendor::no_offset_t, vendor::dynamic_offset_t<_database_t>>
{
static_assert(is_noop_t<Offset>::value, "cannot call offset()/dynamic_offset() twice");
static_assert(not std::is_same<_database_t, void>::value, "dynamic_offset must not be called in a static statement");
return { *this, vendor::dynamic_offset_t<_database_t>{} };
}
// value adding methods
template<typename... Args>
void add_flag(Args... args)
@ -349,22 +334,6 @@ namespace sqlpp
return _order_by.add_order_by(*this, args...);
}
template<typename Arg>
void set_limit(Arg arg)
{
static_assert(is_limit_t<Limit>::value, "cannot call add_limit() before dynamic_limit()");
static_assert(is_dynamic_t<Limit>::value, "cannot call add_limit() before dynamic_limit()");
return _limit.set_limit(arg);
}
template<typename Arg>
void set_offset(Arg arg)
{
static_assert(is_offset_t<Offset>::value, "cannot call add_offset() before dynamic_offset()");
static_assert(is_dynamic_t<Offset>::value, "cannot call add_offset() before dynamic_offset()");
return _offset.set_offset(arg);
}
// PseudoTable
template<typename AliasProvider>
struct _pseudo_table_t

8
include/sqlpp11/vendor/limit.h vendored
View File

@ -86,14 +86,6 @@ namespace sqlpp
dynamic_limit_t& operator=(dynamic_limit_t&&) = default;
~dynamic_limit_t() = default;
template<typename Limit>
void set_limit(Limit value)
{
using arg_t = typename wrap_operand<Limit>::type;
_value = arg_t{value};
_initialized = true;
}
template<typename Policies>
struct _methods_t
{

37
include/sqlpp11/vendor/offset.h vendored
View File

@ -40,6 +40,7 @@ namespace sqlpp
struct offset_t
{
using _is_offset = std::true_type;
using _table_set = ::sqlpp::detail::type_set<>;
static_assert(is_integral_t<Offset>::value, "offset requires an integral value or integral parameter");
offset_t(Offset value):
@ -52,6 +53,11 @@ namespace sqlpp
offset_t& operator=(offset_t&&) = default;
~offset_t() = default;
template<typename Policies>
struct _methods_t
{
};
Offset _value;
};
@ -60,6 +66,7 @@ namespace sqlpp
{
using _is_offset = std::true_type;
using _is_dynamic = std::true_type;
using _table_set = ::sqlpp::detail::type_set<>;
dynamic_offset_t():
_value(noop())
@ -79,13 +86,17 @@ namespace sqlpp
dynamic_offset_t& operator=(dynamic_offset_t&&) = default;
~dynamic_offset_t() = default;
template<typename Policies>
struct _methods_t
{
template<typename Offset>
void set_offset(Offset value)
{
using arg_t = typename wrap_operand<Offset>::type;
_value = arg_t(value);
_initialized = true;
static_cast<typename Policies::_select_t*>(this)->_offset._value = arg_t{value};
static_cast<typename Policies::_select_t*>(this)->_offset._initialized = true;
}
};
bool _initialized = false;
interpretable_t<Database> _value;
@ -95,6 +106,28 @@ namespace sqlpp
{
using _is_noop = std::true_type;
using _table_set = ::sqlpp::detail::type_set<>;
template<typename Policies>
struct _methods_t
{
using _database_t = typename Policies::_database_t;
template<typename T>
using _new_select_t = typename Policies::template _policies_update_t<no_offset_t, T>;
template<typename Arg>
auto offset(Arg arg)
-> _new_select_t<offset_t<typename wrap_operand<Arg>::type>>
{
return { *static_cast<typename Policies::_select_t*>(this), offset_t<typename wrap_operand<Arg>::type>{{arg}} };
}
auto dynamic_offset()
-> _new_select_t<dynamic_offset_t<_database_t>>
{
static_assert(not std::is_same<_database_t, void>::value, "dynamic_offset must not be called in a static statement");
return { *static_cast<typename Policies::_select_t*>(this), dynamic_offset_t<_database_t>{} };
}
};
};
// Interpreters