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/*
* Copyright (c) 2015-2015, 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 "Sample.h"
#include <sqlpp11/sqlpp11.h>
namespace
{
constexpr auto t = test::TabBar{};
constexpr auto f = test::TabFoo{};
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 When>
void when_check(const When& when)
{
using CheckResult = sqlpp::check_case_when_t<When>;
using ExpectedCheckResult = std::is_same<CheckResult, Assert>;
print_type_on_error<CheckResult>(ExpectedCheckResult{});
static_assert(ExpectedCheckResult::value, "Unexpected check result");
using ReturnType = decltype(sqlpp::case_when(when));
using ExpectedReturnType = sqlpp::logic::all_t<Assert::value xor std::is_same<ReturnType, void>::value>;
print_type_on_error<ReturnType>(ExpectedReturnType{});
static_assert(ExpectedReturnType::value, "Unexpected return type");
}
template <typename Assert, typename When, typename Then>
void then_check(const When& when, const Then& then)
{
using CheckResult = sqlpp::check_case_then_t<Then>;
using ExpectedCheckResult = std::is_same<CheckResult, Assert>;
print_type_on_error<CheckResult>(ExpectedCheckResult{});
static_assert(ExpectedCheckResult::value, "Unexpected check result");
using ReturnType = decltype(sqlpp::case_when(when).then(then));
using ExpectedReturnType = sqlpp::logic::all_t<Assert::value xor std::is_same<ReturnType, void>::value>;
print_type_on_error<ReturnType>(ExpectedReturnType{});
static_assert(ExpectedReturnType::value, "Unexpected return type");
}
template <typename Assert, typename When, typename Then, typename Else>
void else_check(const When& when, const Then& then, const Else& else_)
{
using CheckResult = sqlpp::check_case_else_t<sqlpp::wrap_operand_t<Then>, Else>;
using ExpectedCheckResult = std::is_same<CheckResult, Assert>;
print_type_on_error<CheckResult>(ExpectedCheckResult{});
static_assert(ExpectedCheckResult::value, "Unexpected check result");
using ReturnType = decltype(sqlpp::case_when(when).then(then).else_(else_));
using ExpectedReturnType = sqlpp::logic::all_t<Assert::value xor std::is_same<ReturnType, void>::value>;
print_type_on_error<ReturnType>(ExpectedReturnType{});
static_assert(ExpectedReturnType::value, "Unexpected return type");
}
void when()
{
// OK
when_check<sqlpp::consistent_t>(t.gamma);
when_check<sqlpp::consistent_t>(t.gamma == true);
when_check<sqlpp::consistent_t>(count(t.alpha) > 0);
// Try assignment as "when"
when_check<sqlpp::assert_case_when_boolean_expression_t>(t.gamma = true);
// Try non-boolean expression as "when"
when_check<sqlpp::assert_case_when_boolean_expression_t>(t.alpha);
// Try some other types as "when"
when_check<sqlpp::assert_case_when_boolean_expression_t>("true");
when_check<sqlpp::assert_case_when_boolean_expression_t>(42);
when_check<sqlpp::assert_case_when_boolean_expression_t>('c');
when_check<sqlpp::assert_case_when_boolean_expression_t>(nullptr);
// Try to use a table as "when"
when_check<sqlpp::assert_case_when_boolean_expression_t>(t);
// Try to use an alias as "when"
when_check<sqlpp::assert_case_when_boolean_expression_t>(t.gamma.as(t.beta));
}
void then()
{
// OK
then_check<sqlpp::consistent_t>(t.gamma, t.gamma);
then_check<sqlpp::consistent_t>(t.gamma, t.gamma == true);
then_check<sqlpp::consistent_t>(t.gamma, count(t.alpha) > 0);
then_check<sqlpp::consistent_t>(t.gamma, t.alpha);
then_check<sqlpp::consistent_t>(t.gamma, "true");
then_check<sqlpp::consistent_t>(t.gamma, 42);
then_check<sqlpp::consistent_t>(t.gamma, 'c');
then_check<sqlpp::consistent_t>(t.gamma, nullptr);
// Try to use an assignment as "then"
then_check<sqlpp::assert_case_then_expression_t>(t.gamma, t.gamma = true);
// Try to use a table as "then"
then_check<sqlpp::assert_case_then_expression_t>(t.gamma, t);
// Try to use an alias as "then"
then_check<sqlpp::assert_case_then_expression_t>(t.gamma, t.alpha.as(t.beta));
}
void else_()
{
// OK
else_check<sqlpp::consistent_t>(t.gamma, t.gamma, t.gamma);
else_check<sqlpp::consistent_t>(t.gamma, t.alpha, 42);
else_check<sqlpp::consistent_t>(t.gamma, t.beta, "twentyseven");
// Try to use an assignment as "else"
else_check<sqlpp::assert_case_else_expression_t>(t.gamma, t.alpha, t.alpha = 7);
// Try to use a table as "else"
else_check<sqlpp::assert_case_else_expression_t>(t.gamma, t.alpha, t);
// Try to use an alias as "else"
else_check<sqlpp::assert_case_else_expression_t>(t.gamma, t.alpha, t.alpha.as(t.beta));
}
}
int main(int, char* [])
{
when();
then();
else_();
}