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// Copyright (c) 2006-2018 Maxim Khizhinsky
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
#include <type_traits>
#include <cds/opt/options.h>
// Value options
namespace {
template <int Val>
struct int_opt {
static const int value = Val;
};
template <bool Val>
struct bool_opt {
static const bool value = Val;
};
enum user_enum {
val_zero, val_one, val_two, val_three, val_four, val_five
};
template <user_enum Val>
struct enum_opt {
static const user_enum value = Val;
};
}
// Declare necessary cds::opt::find_option specialization for user-provided enum type
CDS_DECLARE_FIND_OPTION_INTEGRAL_SPECIALIZATION( user_enum )
void find_option_compiler_test()
{
// *************************************************
// Type options
//
struct tag_default;
struct tag_a;
struct tag_b;
// Option not found
static_assert( (std::is_same<
cds::opt::find_option< cds::opt::tag<tag_default>, cds::opt::stat<tag_a>, bool_opt<false> >::type,
cds::opt::tag<tag_default>
>::value), "Result != tag_default" );
// Option found once
static_assert( (std::is_same<
cds::opt::find_option< cds::opt::tag<tag_default>, cds::opt::tag<tag_a> >::type,
cds::opt::tag<tag_a>
>::value), "Result != tag_a" );
static_assert( (std::is_same<
cds::opt::find_option< cds::opt::tag<tag_default>, cds::opt::stat<tag_a>, cds::opt::tag<tag_a> >::type,
cds::opt::tag<tag_a>
>::value), "Result != tag_a" );
// First option
static_assert( (std::is_same<
cds::opt::find_option< cds::opt::tag<tag_default>
,cds::opt::tag<tag_a> // desired
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
>::type,
cds::opt::tag<tag_a>
>::value), "Result != tag_a" );
// Last option
static_assert( (std::is_same<
cds::opt::find_option< cds::opt::tag<tag_default>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::tag<tag_a> // desired
>::type,
cds::opt::tag<tag_a>
>::value), "Result != tag_a" );
// Middle option
static_assert( (std::is_same<
cds::opt::find_option< cds::opt::tag<tag_default>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::tag<tag_a> // desired
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
>::type,
cds::opt::tag<tag_a>
>::value), "Result != tag_a" );
// Option not found
static_assert( (std::is_same<
cds::opt::find_option< cds::opt::tag<tag_default>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_default>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
>::type,
cds::opt::tag<tag_default>
>::value), "Result != tag_default" );
// Multiple options
static_assert( (std::is_same<
cds::opt::find_option< cds::opt::tag<tag_default>, cds::opt::tag<tag_a>, cds::opt::tag<tag_b> >::type,
cds::opt::tag<tag_a>
>::value), "Result != tag_a" );
static_assert( (std::is_same<
cds::opt::find_option< cds::opt::tag<tag_default>
,cds::opt::tag<tag_a> // desired - first accepted
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_b>
,cds::opt::stat<tag_a>
,cds::opt::stat<tag_a>
,cds::opt::tag<tag_b> // desired
>::type,
cds::opt::tag<tag_a>
>::value), "Result != tag_a" );
// *****************************************************
// Value options
// Not found
static_assert( (std::is_same<
cds::opt::find_option< int_opt<15>, bool_opt<false>, cds::opt::stat<tag_a> >::type,
int_opt<15>
>::value), "Result != int_opt<15>" );
static_assert( (std::is_same<
cds::opt::find_option< int_opt<15>, int_opt<100>, cds::opt::stat<tag_a> >::type,
int_opt<100>
>::value), "Result != int_opt<100>" );
static_assert( (std::is_same<
cds::opt::find_option< int_opt<15>, int_opt<100>, cds::opt::stat<tag_a>, bool_opt<true>, int_opt<200> >::type,
int_opt<100>
>::value), "Result != int_opt<100>" );
// User-provided enum type
static_assert( (std::is_same<
cds::opt::find_option< enum_opt<val_zero>, int_opt<100>, cds::opt::stat<tag_a>, int_opt<200> >::type,
enum_opt<val_zero>
>::value), "Result != enum_opt<val_zero>" );
static_assert( (std::is_same<
cds::opt::find_option< enum_opt<val_zero>, int_opt<100>, cds::opt::stat<tag_a>, enum_opt<val_three>, int_opt<200> >::type,
enum_opt<val_three>
>::value), "Result != enum_opt<val_three>" );
}
void test_extracting_option_value()
{
struct tag_a;
// Define option
typedef cds::opt::tag< tag_a > tag_option;
// What is the value of the tag_option?
// How we can extract tag_a from tag_option?
// Here is a solution:
typedef cds::opt::value< tag_option >::tag tag_option_value;
// tag_option_value is the same as tag_a
static_assert( (std::is_same< tag_option_value, tag_a >::value), "Error getting the value of option: tag_option_value != tag_a" );
// Value-option
typedef cds::opt::alignment< 16 > align_option;
static_assert( cds::opt::value< align_option >::alignment == 16, "Error getting the value of option: option value != 16" );
}
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