Mercurial > code
changeset 570:dcef88285f8c
Misc: add join function
author | David Demelier <markand@malikania.fr> |
---|---|
date | Wed, 29 Jun 2016 19:12:10 +0200 |
parents | b1c4933afcd0 |
children | c79a501782b0 |
files | misc/join.hpp misc/test-all.cpp misc/test-join.cpp |
diffstat | 3 files changed, 113 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/misc/join.hpp Wed Jun 29 19:12:10 2016 +0200 @@ -0,0 +1,53 @@ +/* + * join.hpp -- join lists into a string + * + * Copyright (c) 2013-2016 David Demelier <markand@malikania.fr> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/** + * Join values by a separator and return a string. + * + * \param first the first iterator + * \param last the last iterator + * \param delim the optional delimiter + * \return the string + */ +template <typename InputIt, typename DelimType = char> +std::string join(InputIt first, InputIt last, DelimType delim = ':') +{ + std::ostringstream oss; + + if (first != last) { + oss << *first; + + while (++first != last) + oss << delim << *first; + } + + return oss.str(); +} + +/** + * Convenient overload. + * + * \param list the initializer list + * \param delim the delimiter + * \return the string + */ +template <typename T, typename DelimType = char> +inline std::string join(std::initializer_list<T> list, DelimType delim = ':') +{ + return join(list.begin(), list.end(), delim); +} \ No newline at end of file
--- a/misc/test-all.cpp Wed Jun 29 19:07:40 2016 +0200 +++ b/misc/test-all.cpp Wed Jun 29 19:12:10 2016 +0200 @@ -19,6 +19,7 @@ #include <gtest/gtest.h> #include "test-clamp.cpp" +#include "test-join.cpp" #include "test-strip.cpp" int main(int argc, char **argv)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/misc/test-join.cpp Wed Jun 29 19:12:10 2016 +0200 @@ -0,0 +1,59 @@ +/* + * test-join.cpp -- test join function + * + * Copyright (c) 2013-2016 David Demelier <markand@malikania.fr> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "join.hpp" + +TEST(Join, empty) +{ + std::string expected = ""; + std::string result = join<int>({}); + + ASSERT_EQ(expected, result); +} + +TEST(Join, one) +{ + std::string expected = "1"; + std::string result = join({1}); + + ASSERT_EQ(expected, result); +} + +TEST(Join, two) +{ + std::string expected = "1:2"; + std::string result = join({1, 2}); + + ASSERT_EQ(expected, result); +} + +TEST(Join, delimiterString) +{ + std::string expected = "1;;2;;3"; + std::string result = join({1, 2, 3}, ";;"); + + ASSERT_EQ(expected, result); +} + +TEST(Join, delimiterChar) +{ + std::string expected = "1@2@3@4"; + std::string result = join({1, 2, 3, 4}, '@'); + + ASSERT_EQ(expected, result); +} \ No newline at end of file