| 1 | // Copyright 2021, 2022 Peter Dimov. |
|---|---|
| 2 | // Distributed under the Boost Software License, Version 1.0. |
| 3 | // https://www.boost.org/LICENSE_1_0.txt |
| 4 | |
| 5 | #include <boost/container_hash/hash.hpp> |
| 6 | #include <boost/core/lightweight_test.hpp> |
| 7 | #include <string> |
| 8 | |
| 9 | void test( unsigned char ch ) |
| 10 | { |
| 11 | typedef boost::hash<std::string> hash; |
| 12 | |
| 13 | int const N = 32; |
| 14 | |
| 15 | std::size_t h[ N ]; |
| 16 | |
| 17 | std::string v; |
| 18 | |
| 19 | for( int i = 0; i < N; ++i ) |
| 20 | { |
| 21 | h[ i ] = hash()( v ); |
| 22 | |
| 23 | BOOST_TEST_EQ( h[ i ], hash()( v ) ); |
| 24 | |
| 25 | for( int j = 0; j < i; ++j ) |
| 26 | { |
| 27 | BOOST_TEST_NE( h[ j ], h[ i ] ); |
| 28 | } |
| 29 | |
| 30 | v.push_back( c: static_cast<char>( ch ) ); |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | int main() |
| 35 | { |
| 36 | for( unsigned ch = 0; ch < 256; ++ch ) |
| 37 | { |
| 38 | test( ch: static_cast<unsigned char>( ch ) ); |
| 39 | } |
| 40 | |
| 41 | return boost::report_errors(); |
| 42 | } |
| 43 |