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243 lines (215 loc) · 6.69 KB
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// Copyright (c) Darrell Wright
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/beached/header_libraries
//
#include "daw/daw_expected.h"
#include "daw/daw_benchmark.h"
#include "daw/daw_traits.h"
#include <cstddef>
#include <exception>
#include <iostream>
#include <stdexcept>
#include <string>
#include <type_traits>
daw::expected_t<int> divide( int v ) {
try {
if( 0 == v ) {
throw std::runtime_error( "division by zero" );
}
return daw::expected_t<int>{ 4 / v };
} catch( ... ) { return std::current_exception( ); }
}
void daw_expected_test_01( ) {
std::cout << "sizeof( size_t ) -> " << sizeof( size_t );
std::cout << " sizeof( int ) -> " << sizeof( int );
std::cout << " sizeof( daw::expected_t<int> ) -> "
<< sizeof( daw::expected_t<int> );
std::cout << " sizeof( daw::expected_t<size_t> ) -> "
<< sizeof( daw::expected_t<size_t> ) << '\n';
daw::expected_t<int> a{ };
daw::expected_t<int> b{ 1 };
daw::expected_t<int> c{ 2 };
daw::expected_t<int> d{ 1 };
daw::expected_t<void> e;
auto X = []( int x ) {
std::cout << "Hello\n";
return x * x;
};
static_assert( std::is_invocable_v<decltype( X ), int>,
"is_callable_v broke" );
daw::expected_t<void> f( []( ) {
std::cout << "Hello\n";
} );
daw::expected_t<void> g(
[]( int ) {
std::cout << "Hello\n";
},
5 );
// daw::expected_t<int> h{ []( int x ) { std::cout << "Hello\n"; return x*x;
// }, 5 };
auto h = divide( 0 );
auto i = divide( 2 );
daw::expecting( h.has_exception( ) );
daw::expecting( !h.has_value( ) );
daw::expecting( !i.has_exception( ) );
daw::expecting( i.has_value( ) );
// a & b
auto test_01 = !( a == b );
auto test_02 = !( b == a );
auto j = divide( 0 );
daw::expecting( j.has_exception( ) );
daw::expecting( !j.has_value( ) );
daw::expecting( test_01 );
daw::expecting( test_02 );
auto const k = daw::expected_from_code(
[]( auto x ) {
return x * x;
},
5 );
daw::expecting( !k.empty( ) );
daw::expecting( k.has_value( ) );
daw::expecting( k.get( ) == 25 );
}
struct L {
int a;
};
void daw_expected_test_02( ) {
auto f = daw::expected_t<void>( []( ) {
std::cout << "Hello\n";
} );
auto l = daw::expected_t<L>( []( ) {
return L{ 5 };
}( ) );
auto a = l->a == 5;
daw::expecting( a );
auto m = daw::expected_from_code( []( ) -> L {
return L{ 6 };
} );
auto ma = m->a == 6;
daw::expecting( ma );
}
void daw_expected_test_copy_001( ) {
auto tmp = daw::expected_t<std::string>( );
tmp = "This is a test";
daw::expecting( tmp.has_value( ) );
daw::expecting( !tmp.has_exception( ) );
daw::expecting( !tmp.empty( ) );
daw::expecting( tmp.get( ) == "This is a test" );
auto tmp2 = daw::expected_t<std::string>( );
tmp2 = tmp;
daw::expecting( tmp.has_value( ) == tmp2.has_value( ) );
daw::expecting( tmp.has_exception( ) == tmp2.has_exception( ) );
daw::expecting( tmp.empty( ) == tmp2.empty( ) );
daw::expecting( tmp.get( ) == tmp2.get( ) );
auto tmp3 = daw::expected_t<std::string>( tmp );
daw::expecting( tmp.has_value( ) == tmp3.has_value( ) );
daw::expecting( tmp.has_exception( ) == tmp3.has_exception( ) );
daw::expecting( tmp.empty( ) == tmp3.empty( ) );
daw::expecting( tmp.get( ) == tmp3.get( ) );
}
void daw_expected_test_copy_002( ) {
auto tmp = daw::expected_t<std::string>( );
try {
throw std::exception{ };
} catch( ... ) { tmp.set_exception( ); }
daw::expecting( !tmp.has_value( ) );
daw::expecting( tmp.has_exception( ) );
daw::expecting( !tmp.empty( ) );
daw::expecting_exception( [&]( ) {
(void)tmp.get( );
} );
auto tmp2 = daw::expected_t<std::string>( );
tmp2 = tmp;
daw::expecting( tmp.has_value( ) == tmp2.has_value( ) );
daw::expecting( tmp.has_exception( ) == tmp2.has_exception( ) );
daw::expecting( tmp.empty( ) == tmp2.empty( ) );
daw::expecting_exception( [&]( ) {
(void)tmp2.get( );
} );
auto tmp3 = daw::expected_t<std::string>( tmp );
daw::expecting( tmp.has_value( ) == tmp3.has_value( ) );
daw::expecting( tmp.has_exception( ) == tmp3.has_exception( ) );
daw::expecting( tmp.empty( ) == tmp3.empty( ) );
daw::expecting_exception( [&]( ) {
(void)tmp3.get( );
} );
}
void daw_expected_test_move_assignment_001( ) {
auto tmp = daw::expected_t<std::string>( );
tmp = "This is a test";
daw::expecting( tmp.has_value( ) );
daw::expecting( !tmp.has_exception( ) );
daw::expecting( !tmp.empty( ) );
daw::expecting( tmp.get( ) == "This is a test" );
auto tmp2 = daw::expected_t<std::string>( );
tmp2 = std::move( tmp );
daw::expecting( tmp2.has_value( ) );
daw::expecting( !tmp2.has_exception( ) );
daw::expecting( !tmp2.empty( ) );
daw::expecting( tmp2.get( ) == "This is a test" );
}
void daw_expected_test_move_construction_001( ) {
auto tmp = daw::expected_t<std::string>( );
tmp = "This is a test";
daw::expecting( tmp.has_value( ) );
daw::expecting( !tmp.has_exception( ) );
daw::expecting( !tmp.empty( ) );
daw::expecting( tmp.get( ) == "This is a test" );
auto tmp2 = daw::expected_t<std::string>( std::move( tmp ) );
daw::expecting( tmp2.has_value( ) );
daw::expecting( !tmp2.has_exception( ) );
daw::expecting( !tmp2.empty( ) );
daw::expecting( tmp2.get( ) == "This is a test" );
}
void daw_expected_test_move_assignment_002( ) {
auto tmp = daw::expected_t<std::string>( );
try {
throw std::exception{ };
} catch( ... ) { tmp.set_exception( ); }
daw::expecting( !tmp.has_value( ) );
daw::expecting( tmp.has_exception( ) );
daw::expecting( !tmp.empty( ) );
daw::expecting_exception( [&]( ) {
(void)tmp.get( );
} );
auto tmp2 = daw::expected_t<std::string>( );
tmp2 = std::move( tmp );
daw::expecting( !tmp2.has_value( ) );
daw::expecting( tmp2.has_exception( ) );
daw::expecting( !tmp2.empty( ) );
daw::expecting_exception( [&]( ) {
(void)tmp2.get( );
} );
}
void daw_expected_test_move_construction_002( ) {
auto tmp = daw::expected_t<std::string>( );
try {
throw std::exception{ };
} catch( ... ) { tmp.set_exception( ); }
daw::expecting( !tmp.has_value( ) );
daw::expecting( tmp.has_exception( ) );
daw::expecting( !tmp.empty( ) );
daw::expecting_exception( [&]( ) {
(void)tmp.get( );
} );
auto tmp2 = daw::expected_t<std::string>( std::move( tmp ) );
daw::expecting( !tmp2.has_value( ) );
daw::expecting( tmp2.has_exception( ) );
daw::expecting( !tmp2.empty( ) );
daw::expecting_exception( [&]( ) {
(void)tmp2.get( );
} );
}
int main( ) {
daw_expected_test_01( );
daw_expected_test_02( );
daw_expected_test_copy_001( );
daw_expected_test_copy_002( );
daw_expected_test_move_assignment_001( );
daw_expected_test_move_construction_001( );
daw_expected_test_move_assignment_002( );
daw_expected_test_move_construction_002( );
}