mirror of
https://github.com/rbock/sqlpp11.git
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160 lines
6.1 KiB
C++
160 lines
6.1 KiB
C++
/*
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* Copyright (c) 2015-2016, Roland Bock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "MockDb.h"
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#include "Sample.h"
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#include <iostream>
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#include <sqlpp11/sqlpp11.h>
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namespace
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{
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constexpr auto t = test::TabBar{};
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template <typename T>
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void print_type_on_error(std::true_type)
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{
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}
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template <typename T>
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void print_type_on_error(std::false_type)
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{
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T::_print_me_;
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}
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template <typename Assert, typename When>
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void when_check(const When& when)
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{
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using CheckResult = sqlpp::check_case_when_t<When>;
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using ExpectedCheckResult = std::is_same<CheckResult, Assert>;
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print_type_on_error<CheckResult>(ExpectedCheckResult{});
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static_assert(ExpectedCheckResult::value, "Unexpected check result");
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using ReturnType = decltype(sqlpp::case_when(when));
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using ExpectedReturnType = sqlpp::logic::all_t<Assert::value xor std::is_same<ReturnType, Assert>::value>;
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print_type_on_error<ReturnType>(ExpectedReturnType{});
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static_assert(ExpectedReturnType::value, "Unexpected return type");
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}
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template <typename Assert, typename When, typename Then>
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void then_check(const When& when, const Then& then)
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{
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using CheckResult = sqlpp::check_case_then_t<Then>;
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using ExpectedCheckResult = std::is_same<CheckResult, Assert>;
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print_type_on_error<CheckResult>(ExpectedCheckResult{});
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static_assert(ExpectedCheckResult::value, "Unexpected check result");
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using ReturnType = decltype(sqlpp::case_when(when).then(then));
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using ExpectedReturnType = sqlpp::logic::all_t<Assert::value xor std::is_same<ReturnType, Assert>::value>;
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print_type_on_error<ReturnType>(ExpectedReturnType{});
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static_assert(ExpectedReturnType::value, "Unexpected return type");
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}
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template <typename Assert, typename When, typename Then, typename Else>
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void else_check(const When& when, const Then& then, const Else& else_)
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{
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using CheckResult = sqlpp::check_case_else_t<sqlpp::wrap_operand_t<Then>, Else>;
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using ExpectedCheckResult = std::is_same<CheckResult, Assert>;
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print_type_on_error<CheckResult>(ExpectedCheckResult{});
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static_assert(ExpectedCheckResult::value, "Unexpected check result");
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using ReturnType = decltype(sqlpp::case_when(when).then(then).else_(else_));
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using ExpectedReturnType = sqlpp::logic::all_t<Assert::value xor std::is_same<ReturnType, Assert>::value>;
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print_type_on_error<ReturnType>(ExpectedReturnType{});
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static_assert(ExpectedReturnType::value, "Unexpected return type");
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}
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void when()
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{
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// OK
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when_check<sqlpp::consistent_t>(t.gamma);
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when_check<sqlpp::consistent_t>(t.gamma == true);
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when_check<sqlpp::consistent_t>(count(t.alpha) > 0);
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// Try assignment as "when"
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when_check<sqlpp::assert_case_when_boolean_expression_t>(t.gamma = true);
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// Try non-boolean expression as "when"
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when_check<sqlpp::assert_case_when_boolean_expression_t>(t.alpha);
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// Try some other types as "when"
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when_check<sqlpp::assert_case_when_boolean_expression_t>("true");
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when_check<sqlpp::assert_case_when_boolean_expression_t>(42);
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when_check<sqlpp::assert_case_when_boolean_expression_t>('c');
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when_check<sqlpp::assert_case_when_boolean_expression_t>(nullptr);
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// Try to use a table as "when"
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when_check<sqlpp::assert_case_when_boolean_expression_t>(t);
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// Try to use an alias as "when"
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when_check<sqlpp::assert_case_when_boolean_expression_t>(t.gamma.as(t.beta));
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}
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void then()
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{
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// OK
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then_check<sqlpp::consistent_t>(t.gamma, t.gamma);
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then_check<sqlpp::consistent_t>(t.gamma, t.gamma == true);
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then_check<sqlpp::consistent_t>(t.gamma, count(t.alpha) > 0);
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then_check<sqlpp::consistent_t>(t.gamma, t.alpha);
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then_check<sqlpp::consistent_t>(t.gamma, "true");
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then_check<sqlpp::consistent_t>(t.gamma, 42);
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then_check<sqlpp::consistent_t>(t.gamma, 'c');
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then_check<sqlpp::consistent_t>(t.gamma, nullptr);
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// Try to use an assignment as "then"
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then_check<sqlpp::assert_case_then_expression_t>(t.gamma, t.gamma = true);
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// Try to use a table as "then"
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then_check<sqlpp::assert_case_then_expression_t>(t.gamma, t);
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// Try to use an alias as "then"
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then_check<sqlpp::assert_case_then_expression_t>(t.gamma, t.alpha.as(t.beta));
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}
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void else_()
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{
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// OK
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else_check<sqlpp::consistent_t>(t.gamma, t.gamma, t.gamma);
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else_check<sqlpp::consistent_t>(t.gamma, t.alpha, 42);
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else_check<sqlpp::consistent_t>(t.gamma, t.beta, "twentyseven");
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// Try to use an assignment as "else"
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else_check<sqlpp::assert_case_else_expression_t>(t.gamma, t.alpha, t.alpha = 7);
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// Try to use a table as "else"
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else_check<sqlpp::assert_case_else_expression_t>(t.gamma, t.alpha, t);
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// Try to use an alias as "else"
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else_check<sqlpp::assert_case_else_expression_t>(t.gamma, t.alpha, t.alpha.as(t.beta));
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}
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}
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int main(int, char* [])
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{
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when();
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then();
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else_();
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}
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