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Added generic boolean_expression

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rbock 2014-08-02 09:18:01 +02:00
parent 18dc6b1a03
commit 8b5fc67af6
5 changed files with 127 additions and 1 deletions
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83
include/sqlpp11/boolean_expression.h Normal file
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@ -0,0 +1,83 @@
/*
* Copyright (c) 2013-2014, 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.
*/
#ifndef SQLPP_BOOLEAN_EXPRESSION_H
#define SQLPP_BOOLEAN_EXPRESSION_H
#include <sqlpp11/type_traits.h>
#include <sqlpp11/interpretable.h>
namespace sqlpp
{
template<typename Database>
struct boolean_expression_t
{
using _traits = make_traits<boolean, tag::is_expression>;
using _recursive_traits = make_recursive_traits<>;
template<typename Expression>
boolean_expression_t(Expression expression):
_expression(expression)
{
static_assert(is_expression_t<Expression>::value, "boolean_expression requires a boolean expression argument");
static_assert(is_boolean_t<Expression>::value, "boolean_expression requires a boolean expression argument");
}
boolean_expression_t(const boolean_expression_t&) = default;
boolean_expression_t(boolean_expression_t&&) = default;
boolean_expression_t& operator=(const boolean_expression_t&) = default;
boolean_expression_t& operator=(boolean_expression_t&&) = default;
~boolean_expression_t() = default;
interpretable_t<Database> _expression;
};
template<typename Database, typename T>
boolean_expression_t<Database> boolean_expression(const Database&, T t)
{
return {t};
}
template<typename Database, typename T>
boolean_expression_t<Database> boolean_expression(T t)
{
return {t};
}
template<typename Context, typename Database>
struct serializer_t<Context, boolean_expression_t<Database>>
{
using T = boolean_expression_t<Database>;
static Context& _(const T& t, Context& context)
{
return serialize(t._expression);
}
};
}
#endif

1
include/sqlpp11/functions.h
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@ -46,7 +46,6 @@
namespace sqlpp
{
#warning add a template<typename Db> bool_expression which takes any bool expression as constructor argument
template<typename T>
auto value(T t) -> wrap_operand_t<T>
{

1
include/sqlpp11/sqlpp11.h
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@ -35,6 +35,7 @@
#include <sqlpp11/select.h>
#include <sqlpp11/functions.h>
#include <sqlpp11/transaction.h>
#include <sqlpp11/boolean_expression.h>
#endif

42
tests/BooleanExpressionTest.cpp Normal file
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@ -0,0 +1,42 @@
/*
* Copyright (c) 2013-2014, 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 "Sample.h"
#include "MockDb.h"
#include <sqlpp11/sqlpp11.h>
MockDb db = {};
int main()
{
test::TabBar t;
auto x = boolean_expression(db, t.alpha == 7);
x = boolean_expression(db, t.gamma);
x = sqlpp::boolean_expression<MockDb>(t.beta.like("%cheesecake"));
return 0;
}

1
tests/CMakeLists.txt
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@ -6,6 +6,7 @@ macro (build_and_run arg)
add_test(${arg} ${arg})
endmacro ()
build_and_run(BooleanExpressionTest)
build_and_run(InterpretTest)
build_and_run(InsertTest)
build_and_run(RemoveTest)