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sqlpp11/test_static_asserts/no_self_compare.cpp
2016-04-09 21:46:31 +02:00

86 lines
3.8 KiB
C++

/*
* Copyright (c) 2015-2016, 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 <iostream>
#include <MockDb.h>
#include "AssertTables.h"
#include <sqlpp11/sqlpp11.h>
namespace
{
constexpr auto t = test::TabAllTypes{};
template <typename T>
void print_type_on_error(std::true_type)
{
}
template <typename T>
void print_type_on_error(std::false_type)
{
T::_print_me_;
}
template <typename Assert, typename Operand>
void static_check_self_compare(const Operand& operand)
{
using CheckResult = sqlpp::check_comparison_t<Operand, Operand>;
using ExpectedCheckResult = std::is_same<CheckResult, Assert>;
static_assert(ExpectedCheckResult::value, "Unexpected check result");
print_type_on_error<CheckResult>(ExpectedCheckResult{});
using ReturnType = sqlpp::detail::make_type_set_t<decltype(operand < operand), decltype(operand <= operand),
decltype(operand == operand), decltype(operand != operand),
decltype(operand >= operand), decltype(operand > operand)>;
using ExpectedReturnType = sqlpp::logic::all_t<
Assert::value xor
std::is_same<ReturnType, sqlpp::detail::type_set<sqlpp::bad_expression<sqlpp::boolean>>>::value>;
static_assert(ExpectedReturnType::value, "Unexpected return type");
print_type_on_error<ReturnType>(ExpectedReturnType{});
}
void disallowed_self_comparison()
{
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.someString);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.someInt);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.someFloat);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.someBool);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.someDayPoint);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.someTimePoint);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.otherString);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.otherInt);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.otherFloat);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.otherBool);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.otherDayPoint);
static_check_self_compare<sqlpp::assert_comparison_lhs_rhs_differ_t>(t.otherTimePoint);
}
}
int main(int, char* [])
{
// t.someString == t.someString;
disallowed_self_comparison();
}