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example に FizzBuzz を追加

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manga_osyo 2012-05-15 17:22:21 +09:00
parent b67695ec6b
commit 053ecdcdd4
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example/fizzbuzz/main.cpp Normal file
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//
// Sprout C++ Library
//
// Copyright (c) 2012
// bolero-MURAKAMI : http://d.hatena.ne.jp/boleros/
// osyo-manga : http://d.hatena.ne.jp/osyo-manga/
//
// Readme:
// https://github.com/osyo-manga/cpp-half/blob/master/README
//
// License:
// Boost Software License - Version 1.0
// <http://www.boost.org/LICENSE_1_0.txt>
//
#include <sprout/algorithm/transform.hpp>
#include <sprout/array.hpp>
#include <sprout/string.hpp>
#include <sprout/numeric/iota.hpp>
#include <sprout/pit.hpp>
#include <iostream>
struct fizzbuzz{
typedef sprout::string<12> result_type;
constexpr result_type
operator ()(int n) const{
return n % 15 == 0 ? sprout::to_string("FizzBuzz")
: n % 3 == 0 ? sprout::to_string("Fizz")
: n % 5 == 0 ? sprout::to_string("Buzz")
: sprout::to_string(n);
}
};
int
main(){
typedef fizzbuzz::result_type string;
//
// Test
//
static_assert(fizzbuzz()( 1) == "1", "");
static_assert(fizzbuzz()( 2) == "2", "");
static_assert(fizzbuzz()( 3) == "Fizz", "");
static_assert(fizzbuzz()( 5) == "Buzz", "");
static_assert(fizzbuzz()(15) == "FizzBuzz", "");
//
// Sequence [1..15]
//
constexpr auto source = sprout::iota(
sprout::pit<sprout::array<int, 15> >(),
1
);
//
// Transform to FizzBuzz
//
constexpr auto result = sprout::transform(
sprout::begin(source),
sprout::end(source),
sprout::pit<sprout::array<string, 15> >(),
fizzbuzz()
);
//
// Check result
//
constexpr auto fizzbuzz_result = sprout::make_array<string>(
sprout::to_string("1"),
sprout::to_string("2"),
sprout::to_string("Fizz"),
sprout::to_string("4"),
sprout::to_string("Buzz"),
sprout::to_string("Fizz"),
sprout::to_string("7"),
sprout::to_string("8"),
sprout::to_string("Fizz"),
sprout::to_string("Buzz"),
sprout::to_string("11"),
sprout::to_string("Fizz"),
sprout::to_string("13"),
sprout::to_string("14"),
sprout::to_string("FizzBuzz")
);
// Equal result sequence
static_assert(result == fizzbuzz_result, "");
//
// Output
//
for(auto&& str : result){
std::cout << str << ", ";
}
std::cout << std::endl;
return 0;
}