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Added shift left and shift right operators.

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This commit is contained in:
Roland Bock 2021-09-04 13:40:03 +02:00
parent 24a0734245
commit 136b533fcf
8 changed files with 141 additions and 2 deletions
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14
include/sqlpp11/basic_expression_operators.h
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@ -299,6 +299,20 @@ namespace sqlpp
return_type_unary_minus<Expr, Defer>::check::verify();
return {*static_cast<const Expr*>(this)};
}
template <typename R>
auto operator<<(const R& r) const -> return_type_shift_left_t<Expr, R>
{
typename return_type_shift_left<Expr, R>::check{};
return {*static_cast<const Expr*>(this), wrap_operand_t<R>{r}};
}
template <typename R>
auto operator>>(const R& r) const -> return_type_shift_right_t<Expr, R>
{
typename return_type_shift_right<Expr, R>::check{};
return {*static_cast<const Expr*>(this), wrap_operand_t<R>{r}};
}
};
} // namespace sqlpp

14
include/sqlpp11/data_types/integral/expression_operators.h
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@ -132,5 +132,19 @@ namespace sqlpp
using check = consistent_t;
using type = bitwise_or_t<wrap_operand_t<L>, integral, wrap_operand_t<R>>;
};
template <typename L, typename R>
struct return_type_shift_left<L, R, binary_operand_check_t<L, is_integral_t, R, is_unsigned_integral_t>>
{
using check = consistent_t;
using type = shift_left_t<wrap_operand_t<L>, integral, wrap_operand_t<R>>;
};
template <typename L, typename R>
struct return_type_shift_right<L, R, binary_operand_check_t<L, is_integral_t, R, is_unsigned_integral_t>>
{
using check = consistent_t;
using type = shift_right_t<wrap_operand_t<L>, integral, wrap_operand_t<R>>;
};
} // namespace sqlpp
#endif

14
include/sqlpp11/data_types/unsigned_integral/expression_operators.h
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@ -113,5 +113,19 @@ namespace sqlpp
using check = consistent_t;
using type = bitwise_or_t<wrap_operand_t<L>, unsigned_integral, wrap_operand_t<R>>;
};
template <typename L, typename R>
struct return_type_shift_left<L, R, binary_operand_check_t<L, is_unsigned_integral_t, R, is_unsigned_integral_t>>
{
using check = consistent_t;
using type = shift_left_t<wrap_operand_t<L>, unsigned_integral, wrap_operand_t<R>>;
};
template <typename L, typename R>
struct return_type_shift_right<L, R, binary_operand_check_t<L, is_unsigned_integral_t, R, is_unsigned_integral_t>>
{
using check = consistent_t;
using type = shift_right_t<wrap_operand_t<L>, unsigned_integral, wrap_operand_t<R>>;
};
} // namespace sqlpp
#endif

20
include/sqlpp11/expression_fwd.h
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@ -157,6 +157,20 @@ namespace sqlpp
using _traits = make_traits<ValueType>;
static constexpr const char* _name = "|";
};
template <typename ValueType>
struct shift_left
{
using _traits = make_traits<ValueType>;
static constexpr const char* _name = "<<";
};
template <typename ValueType>
struct shift_right
{
using _traits = make_traits<ValueType>;
static constexpr const char* _name = ">>";
};
} // namespace op
template <typename Lhs, typename O, typename Rhs>
@ -219,6 +233,12 @@ namespace sqlpp
template <typename Lhs, typename ValueType, typename Rhs>
using bitwise_or_t = binary_expression_t<Lhs, op::bitwise_or<ValueType>, Rhs>;
template <typename Lhs, typename ValueType, typename Rhs>
using shift_left_t = binary_expression_t<Lhs, op::shift_left<ValueType>, Rhs>;
template <typename Lhs, typename ValueType, typename Rhs>
using shift_right_t = binary_expression_t<Lhs, op::shift_right<ValueType>, Rhs>;
namespace detail
{
template <typename Expr, typename Enable = void>

18
include/sqlpp11/expression_return_types.h
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@ -49,6 +49,24 @@ namespace sqlpp
template <typename L, typename R>
using return_type_bitwise_and_t = typename return_type_bitwise_and<L, R>::type;
template <typename L, typename R, typename Enable = void>
struct return_type_shift_left
{
using check = assert_valid_operands;
using type = bad_expression<boolean>;
};
template <typename L, typename R>
using return_type_shift_left_t = typename return_type_shift_left<L, R>::type;
template <typename L, typename R, typename Enable = void>
struct return_type_shift_right
{
using check = assert_valid_operands;
using type = bad_expression<boolean>;
};
template <typename L, typename R>
using return_type_shift_right_t = typename return_type_shift_right<L, R>::type;
template <typename L, typename R, typename Enable = void>
struct return_type_or
{

8
include/sqlpp11/value.h
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@ -32,7 +32,13 @@
namespace sqlpp
{
template <typename T>
auto value(T t) -> wrap_operand_t<T>
struct value_t : public wrap_operand_t<T>, public expression_operators<value_t<T>, value_type_of<wrap_operand_t<T>>>
{
using _base_t = wrap_operand_t<T>;
using _base_t::_base_t;
};
template <typename T>
auto value(T t) -> value_t<T>
{
static_assert(is_wrapped_value_t<wrap_operand_t<T>>::value,
"value() is to be called with non-sql-type like int, or string");

1
tests/core/serialize/CMakeLists.txt
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@ -31,6 +31,7 @@ set(test_serializer_names
From
In
Insert
Operator
Over
TableAlias
Where

52
tests/core/serialize/Operator.cpp Normal file
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@ -0,0 +1,52 @@
/*
* Copyright (c) 2021-2021, 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.
*/
#include "Sample.h"
#include "compare.h"
#include <sqlpp11/sqlpp11.h>
#include <iostream>
SQLPP_ALIAS_PROVIDER(sample)
int Operator(int, char* [])
{
const auto foo = test::TabFoo{};
const auto bar = test::TabBar{};
// Plus
compare(__LINE__, bar.alpha + 3u, "(tab_bar.alpha+3)");
compare(__LINE__, sqlpp::value(3) + foo.psi, "(3+tab_foo.psi)");
// Shift left
compare(__LINE__, sqlpp::value(3) << foo.psi, "(3<<tab_foo.psi)");
compare(__LINE__, bar.alpha << 3u, "(tab_bar.alpha<<3)");
// Shift right
compare(__LINE__, sqlpp::value(3) >> foo.psi, "(3>>tab_foo.psi)");
compare(__LINE__, bar.alpha >> 3u, "(tab_bar.alpha>>3)");
return 0;
}