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Diffstat (limited to '')
-rw-r--r-- | third_party/immer/benchmark/set/string-box/generator.ipp | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/immer/benchmark/set/string-box/generator.ipp b/third_party/immer/benchmark/set/string-box/generator.ipp new file mode 100644 index 000000000000..9adc82e0bdc0 --- /dev/null +++ b/third_party/immer/benchmark/set/string-box/generator.ipp @@ -0,0 +1,46 @@ +// +// immer: immutable data structures for C++ +// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente +// +// This software is distributed under the Boost Software License, Version 1.0. +// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt +// + +#include <immer/box.hpp> + +#include <random> +#include <vector> +#include <cassert> +#include <functional> +#include <algorithm> + +#define GENERATOR_T generate_unsigned + +namespace { + +struct GENERATOR_T +{ + static constexpr auto char_set = "_-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; + static constexpr auto max_length = 64; + static constexpr auto min_length = 8; + + auto operator() (std::size_t runs) const + { + assert(runs > 0); + auto engine = std::default_random_engine{42}; + auto dist = std::uniform_int_distribution<unsigned>{}; + auto gen = std::bind(dist, engine); + auto r = std::vector<immer::box<std::string>>(runs); + std::generate_n(r.begin(), runs, [&] { + auto len = gen() % (max_length - min_length) + min_length; + auto str = std::string(len, ' '); + std::generate_n(str.begin(), len, [&] { + return char_set[gen() % sizeof(char_set)]; + }); + return str; + }); + return r; + } +}; + +} // namespace |