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| author | Dan Goodliffe <dan@randomdan.homeip.net> | 2016-12-09 16:28:48 +0000 |
|---|---|---|
| committer | Dan Goodliffe <dan@randomdan.homeip.net> | 2016-12-09 16:28:48 +0000 |
| commit | 02f4420399a388f4c7cca0e9ab87ecf8e4286e08 (patch) | |
| tree | 1a08600060cde4165a8168252f8c3ab16c34f19d | |
| parent | Custom stop chars are never used (diff) | |
| download | libadhocutil-02f4420399a388f4c7cca0e9ab87ecf8e4286e08.tar.bz2 libadhocutil-02f4420399a388f4c7cca0e9ab87ecf8e4286e08.tar.xz libadhocutil-02f4420399a388f4c7cca0e9ab87ecf8e4286e08.zip | |
Provide a way of formatting a literal percent sign
| -rw-r--r-- | libadhocutil/compileTimeFormatter.h | 11 | ||||
| -rw-r--r-- | libadhocutil/unittests/testCompileTimeFormatter.cpp | 34 |
2 files changed, 44 insertions, 1 deletions
diff --git a/libadhocutil/compileTimeFormatter.h b/libadhocutil/compileTimeFormatter.h index d9349dc..e17270a 100644 --- a/libadhocutil/compileTimeFormatter.h +++ b/libadhocutil/compileTimeFormatter.h @@ -80,6 +80,17 @@ namespace AdHoc { } }; + // Escaped % stream writer formatter + template<const char * const & S, int start, typename stream, char ... sn> + struct StreamWriter<S, start, stream, '%', '%', sn...> { + template<typename ... Pn> + static void write(stream & s, const Pn & ... pn) + { + s << '%'; + StreamWriter<S, start + 2, stream, sn...>::write(s, pn...); + } + }; + // Unknown stream writer formatter template<const char * const & S, int start, typename stream, char ... sn> struct StreamWriter<S, start, stream, '%', sn...> { diff --git a/libadhocutil/unittests/testCompileTimeFormatter.cpp b/libadhocutil/unittests/testCompileTimeFormatter.cpp index ffb528b..b3e3dac 100644 --- a/libadhocutil/unittests/testCompileTimeFormatter.cpp +++ b/libadhocutil/unittests/testCompileTimeFormatter.cpp @@ -16,6 +16,10 @@ extern constexpr const char * formatEdgeCaseFormatLonely = "%?"; extern constexpr const char * formatStringLiteral = "literal"; extern constexpr const char * formatStringSingle = "single %?."; extern constexpr const char * formatStringMulti = "First %?, then %?."; +extern constexpr const char * formatStringEscape1 = "literal %% percentage."; +extern constexpr const char * formatStringEscape2 = "literal %%? percentage."; +extern constexpr const char * formatStringEscape3 = "literal %%%? percentage."; +extern constexpr const char * formatStringEscape4 = "literal %%%?%% percentage."; BOOST_AUTO_TEST_CASE ( empty ) { @@ -84,10 +88,38 @@ BOOST_AUTO_TEST_CASE ( singlePath ) BOOST_AUTO_TEST_CASE ( multi ) { std::stringstream buf; - Formatter<formatStringMulti>::write(buf, "one", "two"); + Formatter<formatStringMulti>::write(buf, "one", "two"); BOOST_REQUIRE_EQUAL(buf.str(), "First one, then two."); } +BOOST_AUTO_TEST_CASE ( escape1 ) +{ + std::stringstream buf; + Formatter<formatStringEscape1>::write(buf); + BOOST_REQUIRE_EQUAL(buf.str(), "literal % percentage."); +} + +BOOST_AUTO_TEST_CASE ( escape2 ) +{ + std::stringstream buf; + Formatter<formatStringEscape2>::write(buf); + BOOST_REQUIRE_EQUAL(buf.str(), "literal %? percentage."); +} + +BOOST_AUTO_TEST_CASE ( escape3 ) +{ + std::stringstream buf; + Formatter<formatStringEscape3>::write(buf, 3); + BOOST_REQUIRE_EQUAL(buf.str(), "literal %3 percentage."); +} + +BOOST_AUTO_TEST_CASE ( escape4 ) +{ + std::stringstream buf; + Formatter<formatStringEscape4>::write(buf, 3); + BOOST_REQUIRE_EQUAL(buf.str(), "literal %3% percentage."); +} + namespace AdHoc { // Custom stream writer formatter, formats as (bracketed expression) template<const char * const & S, int start, typename stream, char ... sn> |