sqlpp11/tests/Prepared.cpp

/*
 * Copyright (c) 2013-2015, 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 "Sample.h"
#include "MockDb.h"
#include "is_regular.h"
#include <sqlpp11/functions.h>
#include <sqlpp11/select.h>

int Prepared(int, char**)
{
	MockDb db = {};
	//test::TabFoo f; 
	test::TabBar t;

	// empty parameter lists
	{
		using P = sqlpp::make_parameter_list_t<decltype(t.alpha)>;
		static_assert(P::size::value == 0, "type requirement");
	}

	// single parameter
	{
		using P = sqlpp::make_parameter_list_t<decltype(parameter(t.alpha))>;
		static_assert(P::size::value == 1, "type requirement");
		auto p = P{};
		p.alpha = 7;
	}

	// single parameter
	{
		using P = sqlpp::make_parameter_list_t<decltype(parameter(t.beta))>;
		static_assert(P::size::value == 1, "type requirement");
		auto p = P{};
		p.beta = "cheesecake";
	}

	// single parameter in expression
	{
		using P = sqlpp::make_parameter_list_t<decltype(t.alpha == parameter(t.alpha))>;
		static_assert(P::size::value == 1, "type requirement");
		auto p = P{};
		p.alpha = 7;
	}


	// single parameter in larger expression
	{
		using P = sqlpp::make_parameter_list_t<decltype((t.beta.like("%") and t.alpha == parameter(t.alpha)) or t.gamma != false)>;
		static_assert(P::size::value == 1, "type requirement");
		auto p = P{};
		p.alpha = 7;
	}

	// three parameters in expression
	{
		using P = sqlpp::parameters_of<decltype((t.beta.like(parameter(t.beta)) and t.alpha == parameter(t.alpha)) or t.gamma != parameter(t.gamma))>;
		// FIXME: make some test, that does not depend on detail namespace, but still checks the correct order of the parameters
		static_assert(std::is_same<P, sqlpp::detail::type_vector<decltype(parameter(t.beta)), decltype(parameter(t.alpha)),decltype(parameter(t.gamma))>>::value, "type requirement");
	}

	// OK, fine, now create a named parameter list from an expression
	{
		using Exp = decltype((t.beta.like(parameter(t.beta)) and t.alpha == parameter(t.alpha)) or t.gamma != parameter(t.gamma));
		using P = sqlpp::make_parameter_list_t<Exp>;
		P npl;
		static_assert(std::is_same<sqlpp::parameter_value_t<sqlpp::value_type_of<decltype(t.alpha)>>, decltype(npl.alpha)>::value, "type requirement");
		static_assert(std::is_same<sqlpp::parameter_value_t<sqlpp::value_type_of<decltype(t.beta)>>, decltype(npl.beta)>::value, "type requirement");
		static_assert(std::is_same<sqlpp::parameter_value_t<sqlpp::value_type_of<decltype(t.gamma)>>, decltype(npl.gamma)>::value, "type requirement");
	}

	// Wonderful, now take a look at the parameter list of a select
	{
		auto s = select(all_of(t)).from(t).where((t.beta.like(parameter(t.beta)) and t.alpha == parameter(t.alpha)) or t.gamma != parameter(t.gamma));
		auto p = db.prepare(s);
		p.params.alpha = 7;
		p.params.alpha = sqlpp::tvin(0);
		using S = decltype(s);
		using P = sqlpp::make_parameter_list_t<S>;
		P npl;

		static_assert(std::is_same<sqlpp::parameter_value_t<sqlpp::value_type_of<decltype(t.alpha)>>, decltype(npl.alpha)>::value, "type requirement");
		static_assert(std::is_same<sqlpp::parameter_value_t<sqlpp::value_type_of<decltype(t.beta)>>, decltype(npl.beta)>::value, "type requirement");
		static_assert(std::is_same<sqlpp::parameter_value_t<sqlpp::value_type_of<decltype(t.gamma)>>, decltype(npl.gamma)>::value, "type requirement");
		npl.alpha = 7;
		auto x = npl;
		x = npl;
		std::cerr << x.alpha << std::endl;
		x = decltype(npl)();
		std::cerr << x.alpha << std::endl;
	}

	// Check that a prepared select is default-constructable
	{
		auto s = select(all_of(t)).from(t).where((t.beta.like(parameter(t.beta)) and t.alpha == parameter(t.alpha)) or t.gamma != parameter(t.gamma));
		using P = decltype(db.prepare(s));
		P p;
	}

	return 0;
}