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Diffstat (limited to 'src/seastar/fmt/test/printf-test.cc')
| -rw-r--r-- | src/seastar/fmt/test/printf-test.cc | 569 |
1 files changed, 569 insertions, 0 deletions
diff --git a/src/seastar/fmt/test/printf-test.cc b/src/seastar/fmt/test/printf-test.cc new file mode 100644 index 00000000..cc62b912 --- /dev/null +++ b/src/seastar/fmt/test/printf-test.cc @@ -0,0 +1,569 @@ +// Formatting library for C++ - printf tests +// +// Copyright (c) 2012 - present, Victor Zverovich +// All rights reserved. +// +// For the license information refer to format.h. + +#include <cctype> +#include <climits> +#include <cstring> + +#include "fmt/core.h" +#include "fmt/printf.h" +#include "gtest-extra.h" +#include "util.h" + +using fmt::format; +using fmt::format_error; + +const unsigned BIG_NUM = INT_MAX + 1u; + +// Makes format string argument positional. +static std::string make_positional(fmt::string_view format) { + std::string s(format.data(), format.size()); + s.replace(s.find('%'), 1, "%1$"); + return s; +} + +static std::wstring make_positional(fmt::wstring_view format) { + std::wstring s(format.data(), format.size()); + s.replace(s.find(L'%'), 1, L"%1$"); + return s; +} + +// A wrapper around fmt::sprintf to workaround bogus warnings about invalid +// format strings in MSVC. +template <typename... Args> +std::string test_sprintf(fmt::string_view format, const Args &... args) { + return fmt::sprintf(format, args...); +} +template <typename... Args> +std::wstring test_sprintf(fmt::wstring_view format, const Args &... args) { + return fmt::sprintf(format, args...); +} + +#define EXPECT_PRINTF(expected_output, format, arg) \ + EXPECT_EQ(expected_output, test_sprintf(format, arg)) \ + << "format: " << format; \ + EXPECT_EQ(expected_output, fmt::sprintf(make_positional(format), arg)) + +TEST(PrintfTest, NoArgs) { + EXPECT_EQ("test", test_sprintf("test")); + EXPECT_EQ(L"test", fmt::sprintf(L"test")); +} + +TEST(PrintfTest, Escape) { + EXPECT_EQ("%", test_sprintf("%%")); + EXPECT_EQ("before %", test_sprintf("before %%")); + EXPECT_EQ("% after", test_sprintf("%% after")); + EXPECT_EQ("before % after", test_sprintf("before %% after")); + EXPECT_EQ("%s", test_sprintf("%%s")); + EXPECT_EQ(L"%", fmt::sprintf(L"%%")); + EXPECT_EQ(L"before %", fmt::sprintf(L"before %%")); + EXPECT_EQ(L"% after", fmt::sprintf(L"%% after")); + EXPECT_EQ(L"before % after", fmt::sprintf(L"before %% after")); + EXPECT_EQ(L"%s", fmt::sprintf(L"%%s")); +} + +TEST(PrintfTest, PositionalArgs) { + EXPECT_EQ("42", test_sprintf("%1$d", 42)); + EXPECT_EQ("before 42", test_sprintf("before %1$d", 42)); + EXPECT_EQ("42 after", test_sprintf("%1$d after",42)); + EXPECT_EQ("before 42 after", test_sprintf("before %1$d after", 42)); + EXPECT_EQ("answer = 42", test_sprintf("%1$s = %2$d", "answer", 42)); + EXPECT_EQ("42 is the answer", + test_sprintf("%2$d is the %1$s", "answer", 42)); + EXPECT_EQ("abracadabra", test_sprintf("%1$s%2$s%1$s", "abra", "cad")); +} + +TEST(PrintfTest, AutomaticArgIndexing) { + EXPECT_EQ("abc", test_sprintf("%c%c%c", 'a', 'b', 'c')); +} + +TEST(PrintfTest, NumberIsTooBigInArgIndex) { + EXPECT_THROW_MSG(test_sprintf(format("%{}$", BIG_NUM)), + format_error, "number is too big"); + EXPECT_THROW_MSG(test_sprintf(format("%{}$d", BIG_NUM)), + format_error, "number is too big"); +} + +TEST(PrintfTest, SwitchArgIndexing) { + EXPECT_THROW_MSG(test_sprintf("%1$d%", 1, 2), + format_error, "cannot switch from manual to automatic argument indexing"); + EXPECT_THROW_MSG(test_sprintf(format("%1$d%{}d", BIG_NUM), 1, 2), + format_error, "number is too big"); + EXPECT_THROW_MSG(test_sprintf("%1$d%d", 1, 2), + format_error, "cannot switch from manual to automatic argument indexing"); + + EXPECT_THROW_MSG(test_sprintf("%d%1$", 1, 2), + format_error, "cannot switch from automatic to manual argument indexing"); + EXPECT_THROW_MSG(test_sprintf(format("%d%{}$d", BIG_NUM), 1, 2), + format_error, "number is too big"); + EXPECT_THROW_MSG(test_sprintf("%d%1$d", 1, 2), + format_error, "cannot switch from automatic to manual argument indexing"); + + // Indexing errors override width errors. + EXPECT_THROW_MSG(test_sprintf(format("%d%1${}d", BIG_NUM), 1, 2), + format_error, "number is too big"); + EXPECT_THROW_MSG(test_sprintf(format("%1$d%{}d", BIG_NUM), 1, 2), + format_error, "number is too big"); +} + +TEST(PrintfTest, InvalidArgIndex) { + EXPECT_THROW_MSG(test_sprintf("%0$d", 42), format_error, + "argument index out of range"); + EXPECT_THROW_MSG(test_sprintf("%2$d", 42), format_error, + "argument index out of range"); + EXPECT_THROW_MSG(test_sprintf(format("%{}$d", INT_MAX), 42), + format_error, "argument index out of range"); + + EXPECT_THROW_MSG(test_sprintf("%2$", 42), + format_error, "argument index out of range"); + EXPECT_THROW_MSG(test_sprintf(format("%{}$d", BIG_NUM), 42), + format_error, "number is too big"); +} + +TEST(PrintfTest, DefaultAlignRight) { + EXPECT_PRINTF(" 42", "%5d", 42); + EXPECT_PRINTF(" abc", "%5s", "abc"); +} + +TEST(PrintfTest, ZeroFlag) { + EXPECT_PRINTF("00042", "%05d", 42); + EXPECT_PRINTF("-0042", "%05d", -42); + + EXPECT_PRINTF("00042", "%05d", 42); + EXPECT_PRINTF("-0042", "%05d", -42); + EXPECT_PRINTF("-004.2", "%06g", -4.2); + + EXPECT_PRINTF("+00042", "%00+6d", 42); + + // '0' flag is ignored for non-numeric types. + EXPECT_PRINTF("0000x", "%05c", 'x'); +} + +TEST(PrintfTest, PlusFlag) { + EXPECT_PRINTF("+42", "%+d", 42); + EXPECT_PRINTF("-42", "%+d", -42); + EXPECT_PRINTF("+0042", "%+05d", 42); + EXPECT_PRINTF("+0042", "%0++5d", 42); + + // '+' flag is ignored for non-numeric types. + EXPECT_PRINTF("x", "%+c", 'x'); +} + +TEST(PrintfTest, MinusFlag) { + EXPECT_PRINTF("abc ", "%-5s", "abc"); + EXPECT_PRINTF("abc ", "%0--5s", "abc"); +} + +TEST(PrintfTest, SpaceFlag) { + EXPECT_PRINTF(" 42", "% d", 42); + EXPECT_PRINTF("-42", "% d", -42); + EXPECT_PRINTF(" 0042", "% 05d", 42); + EXPECT_PRINTF(" 0042", "%0 5d", 42); + + // ' ' flag is ignored for non-numeric types. + EXPECT_PRINTF("x", "% c", 'x'); +} + +TEST(PrintfTest, HashFlag) { + EXPECT_PRINTF("042", "%#o", 042); + EXPECT_PRINTF(fmt::format("0{:o}", static_cast<unsigned>(-042)), "%#o", -042); + EXPECT_PRINTF("0", "%#o", 0); + + EXPECT_PRINTF("0x42", "%#x", 0x42); + EXPECT_PRINTF("0X42", "%#X", 0x42); + EXPECT_PRINTF( + fmt::format("0x{:x}", static_cast<unsigned>(-0x42)), "%#x", -0x42); + EXPECT_PRINTF("0", "%#x", 0); + + EXPECT_PRINTF("0x0042", "%#06x", 0x42); + EXPECT_PRINTF("0x0042", "%0##6x", 0x42); + + EXPECT_PRINTF("-42.000000", "%#f", -42.0); + EXPECT_PRINTF("-42.000000", "%#F", -42.0); + + char buffer[BUFFER_SIZE]; + safe_sprintf(buffer, "%#e", -42.0); + EXPECT_PRINTF(buffer, "%#e", -42.0); + safe_sprintf(buffer, "%#E", -42.0); + EXPECT_PRINTF(buffer, "%#E", -42.0); + + EXPECT_PRINTF("-42.0000", "%#g", -42.0); + EXPECT_PRINTF("-42.0000", "%#G", -42.0); + + safe_sprintf(buffer, "%#a", 16.0); + EXPECT_PRINTF(buffer, "%#a", 16.0); + safe_sprintf(buffer, "%#A", 16.0); + EXPECT_PRINTF(buffer, "%#A", 16.0); + + // '#' flag is ignored for non-numeric types. + EXPECT_PRINTF("x", "%#c", 'x'); +} + +TEST(PrintfTest, Width) { + EXPECT_PRINTF(" abc", "%5s", "abc"); + + // Width cannot be specified twice. + EXPECT_THROW_MSG(test_sprintf("%5-5d", 42), format_error, + "invalid type specifier"); + + EXPECT_THROW_MSG(test_sprintf(format("%{}d", BIG_NUM), 42), + format_error, "number is too big"); + EXPECT_THROW_MSG(test_sprintf(format("%1${}d", BIG_NUM), 42), + format_error, "number is too big"); +} + +TEST(PrintfTest, DynamicWidth) { + EXPECT_EQ(" 42", test_sprintf("%*d", 5, 42)); + EXPECT_EQ("42 ", test_sprintf("%*d", -5, 42)); + EXPECT_THROW_MSG(test_sprintf("%*d", 5.0, 42), format_error, + "width is not integer"); + EXPECT_THROW_MSG(test_sprintf("%*d"), format_error, + "argument index out of range"); + EXPECT_THROW_MSG(test_sprintf("%*d", BIG_NUM, 42), format_error, + "number is too big"); +} + +TEST(PrintfTest, IntPrecision) { + EXPECT_PRINTF("00042", "%.5d", 42); + EXPECT_PRINTF("-00042", "%.5d", -42); + EXPECT_PRINTF("00042", "%.5x", 0x42); + EXPECT_PRINTF("0x00042", "%#.5x", 0x42); + EXPECT_PRINTF("00042", "%.5o", 042); + EXPECT_PRINTF("00042", "%#.5o", 042); + + EXPECT_PRINTF(" 00042", "%7.5d", 42); + EXPECT_PRINTF(" 00042", "%7.5x", 0x42); + EXPECT_PRINTF(" 0x00042", "%#10.5x", 0x42); + EXPECT_PRINTF(" 00042", "%7.5o", 042); + EXPECT_PRINTF(" 00042", "%#10.5o", 042); + + EXPECT_PRINTF("00042 ", "%-7.5d", 42); + EXPECT_PRINTF("00042 ", "%-7.5x", 0x42); + EXPECT_PRINTF("0x00042 ", "%-#10.5x", 0x42); + EXPECT_PRINTF("00042 ", "%-7.5o", 042); + EXPECT_PRINTF("00042 ", "%-#10.5o", 042); +} + +TEST(PrintfTest, FloatPrecision) { + char buffer[BUFFER_SIZE]; + safe_sprintf(buffer, "%.3e", 1234.5678); + EXPECT_PRINTF(buffer, "%.3e", 1234.5678); + EXPECT_PRINTF("1234.568", "%.3f", 1234.5678); + safe_sprintf(buffer, "%.3g", 1234.5678); + EXPECT_PRINTF(buffer, "%.3g", 1234.5678); + safe_sprintf(buffer, "%.3a", 1234.5678); + EXPECT_PRINTF(buffer, "%.3a", 1234.5678); +} + +TEST(PrintfTest, IgnorePrecisionForNonNumericArg) { + EXPECT_PRINTF("abc", "%.5s", "abc"); +} + +TEST(PrintfTest, DynamicPrecision) { + EXPECT_EQ("00042", test_sprintf("%.*d", 5, 42)); + EXPECT_EQ("42", test_sprintf("%.*d", -5, 42)); + EXPECT_THROW_MSG(test_sprintf("%.*d", 5.0, 42), format_error, + "precision is not integer"); + EXPECT_THROW_MSG(test_sprintf("%.*d"), format_error, + "argument index out of range"); + EXPECT_THROW_MSG(test_sprintf("%.*d", BIG_NUM, 42), format_error, + "number is too big"); + if (sizeof(long long) != sizeof(int)) { + long long prec = static_cast<long long>(INT_MIN) - 1; + EXPECT_THROW_MSG(test_sprintf("%.*d", prec, 42), format_error, + "number is too big"); + } +} + +template <typename T> +struct make_signed { typedef T type; }; + +#define SPECIALIZE_MAKE_SIGNED(T, S) \ + template <> \ + struct make_signed<T> { typedef S type; } + +SPECIALIZE_MAKE_SIGNED(char, signed char); +SPECIALIZE_MAKE_SIGNED(unsigned char, signed char); +SPECIALIZE_MAKE_SIGNED(unsigned short, short); +SPECIALIZE_MAKE_SIGNED(unsigned, int); +SPECIALIZE_MAKE_SIGNED(unsigned long, long); +SPECIALIZE_MAKE_SIGNED(unsigned long long, long long); + +// Test length format specifier ``length_spec``. +template <typename T, typename U> +void TestLength(const char *length_spec, U value) { + long long signed_value = 0; + unsigned long long unsigned_value = 0; + // Apply integer promotion to the argument. + using std::numeric_limits; + unsigned long long max = numeric_limits<U>::max(); + using fmt::internal::const_check; + if (const_check(max <= static_cast<unsigned>(numeric_limits<int>::max()))) { + signed_value = static_cast<int>(value); + unsigned_value = static_cast<unsigned>(value); + } else if (const_check(max <= numeric_limits<unsigned>::max())) { + signed_value = static_cast<unsigned>(value); + unsigned_value = static_cast<unsigned>(value); + } + if (sizeof(U) <= sizeof(int) && sizeof(int) < sizeof(T)) { + signed_value = static_cast<long long>(value); + unsigned_value = + static_cast<typename std::make_unsigned<unsigned>::type>(value); + } else { + signed_value = static_cast<typename make_signed<T>::type>(value); + unsigned_value = static_cast<typename std::make_unsigned<T>::type>(value); + } + std::ostringstream os; + os << signed_value; + EXPECT_PRINTF(os.str(), fmt::format("%{}d", length_spec), value); + EXPECT_PRINTF(os.str(), fmt::format("%{}i", length_spec), value); + os.str(""); + os << unsigned_value; + EXPECT_PRINTF(os.str(), fmt::format("%{}u", length_spec), value); + os.str(""); + os << std::oct << unsigned_value; + EXPECT_PRINTF(os.str(), fmt::format("%{}o", length_spec), value); + os.str(""); + os << std::hex << unsigned_value; + EXPECT_PRINTF(os.str(), fmt::format("%{}x", length_spec), value); + os.str(""); + os << std::hex << std::uppercase << unsigned_value; + EXPECT_PRINTF(os.str(), fmt::format("%{}X", length_spec), value); +} + +template <typename T> +void TestLength(const char *length_spec) { + T min = std::numeric_limits<T>::min(), max = std::numeric_limits<T>::max(); + TestLength<T>(length_spec, 42); + TestLength<T>(length_spec, -42); + TestLength<T>(length_spec, min); + TestLength<T>(length_spec, max); + TestLength<T>(length_spec, static_cast<long long>(min) - 1); + unsigned long long long_long_max = std::numeric_limits<long long>::max(); + if (static_cast<unsigned long long>(max) < long_long_max) + TestLength<T>(length_spec, static_cast<long long>(max) + 1); + TestLength<T>(length_spec, std::numeric_limits<short>::min()); + TestLength<T>(length_spec, std::numeric_limits<unsigned short>::max()); + TestLength<T>(length_spec, std::numeric_limits<int>::min()); + TestLength<T>(length_spec, std::numeric_limits<int>::max()); + TestLength<T>(length_spec, std::numeric_limits<unsigned>::min()); + TestLength<T>(length_spec, std::numeric_limits<unsigned>::max()); + TestLength<T>(length_spec, std::numeric_limits<long long>::min()); + TestLength<T>(length_spec, std::numeric_limits<long long>::max()); + TestLength<T>(length_spec, std::numeric_limits<unsigned long long>::min()); + TestLength<T>(length_spec, std::numeric_limits<unsigned long long>::max()); +} + +TEST(PrintfTest, Length) { + TestLength<char>("hh"); + TestLength<signed char>("hh"); + TestLength<unsigned char>("hh"); + TestLength<short>("h"); + TestLength<unsigned short>("h"); + TestLength<long>("l"); + TestLength<unsigned long>("l"); + TestLength<long long>("ll"); + TestLength<unsigned long long>("ll"); + TestLength<intmax_t>("j"); + TestLength<std::size_t>("z"); + TestLength<std::ptrdiff_t>("t"); + long double max = std::numeric_limits<long double>::max(); + EXPECT_PRINTF(fmt::format("{}", max), "%g", max); + EXPECT_PRINTF(fmt::format("{}", max), "%Lg", max); +} + +TEST(PrintfTest, Bool) { + EXPECT_PRINTF("1", "%d", true); + EXPECT_PRINTF("true", "%s", true); +} + +TEST(PrintfTest, Int) { + EXPECT_PRINTF("-42", "%d", -42); + EXPECT_PRINTF("-42", "%i", -42); + unsigned u = 0 - 42u; + EXPECT_PRINTF(fmt::format("{}", u), "%u", -42); + EXPECT_PRINTF(fmt::format("{:o}", u), "%o", -42); + EXPECT_PRINTF(fmt::format("{:x}", u), "%x", -42); + EXPECT_PRINTF(fmt::format("{:X}", u), "%X", -42); +} + +TEST(PrintfTest, long_long) { + // fmt::printf allows passing long long arguments to %d without length + // specifiers. + long long max = std::numeric_limits<long long>::max(); + EXPECT_PRINTF(fmt::format("{}", max), "%d", max); +} + +TEST(PrintfTest, Float) { + EXPECT_PRINTF("392.650000", "%f", 392.65); + EXPECT_PRINTF("392.65", "%.2f", 392.65); + EXPECT_PRINTF("392.6", "%.1f", 392.65); + EXPECT_PRINTF("393", "%.f", 392.65); + EXPECT_PRINTF("392.650000", "%F", 392.65); + char buffer[BUFFER_SIZE]; + safe_sprintf(buffer, "%e", 392.65); + EXPECT_PRINTF(buffer, "%e", 392.65); + safe_sprintf(buffer, "%E", 392.65); + EXPECT_PRINTF(buffer, "%E", 392.65); + EXPECT_PRINTF("392.65", "%g", 392.65); + EXPECT_PRINTF("392.65", "%G", 392.65); + safe_sprintf(buffer, "%a", -392.65); + EXPECT_EQ(buffer, format("{:a}", -392.65)); + safe_sprintf(buffer, "%A", -392.65); + EXPECT_EQ(buffer, format("{:A}", -392.65)); +} + +TEST(PrintfTest, Inf) { + double inf = std::numeric_limits<double>::infinity(); + for (const char* type = "fega"; *type; ++type) { + EXPECT_PRINTF("inf", fmt::format("%{}", *type), inf); + char upper = static_cast<char>(std::toupper(*type)); + EXPECT_PRINTF("INF", fmt::format("%{}", upper), inf); + } +} + +TEST(PrintfTest, Char) { + EXPECT_PRINTF("x", "%c", 'x'); + int max = std::numeric_limits<int>::max(); + EXPECT_PRINTF(fmt::format("{}", static_cast<char>(max)), "%c", max); + //EXPECT_PRINTF("x", "%lc", L'x'); + EXPECT_PRINTF(L"x", L"%c", L'x'); + EXPECT_PRINTF(fmt::format(L"{}", static_cast<wchar_t>(max)), L"%c", max); +} + +TEST(PrintfTest, String) { + EXPECT_PRINTF("abc", "%s", "abc"); + const char *null_str = FMT_NULL; + EXPECT_PRINTF("(null)", "%s", null_str); + EXPECT_PRINTF(" (null)", "%10s", null_str); + EXPECT_PRINTF(L"abc", L"%s", L"abc"); + const wchar_t *null_wstr = FMT_NULL; + EXPECT_PRINTF(L"(null)", L"%s", null_wstr); + EXPECT_PRINTF(L" (null)", L"%10s", null_wstr); +} + +TEST(PrintfTest, Pointer) { + int n; + void *p = &n; + EXPECT_PRINTF(fmt::format("{}", p), "%p", p); + p = FMT_NULL; + EXPECT_PRINTF("(nil)", "%p", p); + EXPECT_PRINTF(" (nil)", "%10p", p); + const char *s = "test"; + EXPECT_PRINTF(fmt::format("{:p}", s), "%p", s); + const char *null_str = FMT_NULL; + EXPECT_PRINTF("(nil)", "%p", null_str); + + p = &n; + EXPECT_PRINTF(fmt::format(L"{}", p), L"%p", p); + p = FMT_NULL; + EXPECT_PRINTF(L"(nil)", L"%p", p); + EXPECT_PRINTF(L" (nil)", L"%10p", p); + const wchar_t *w = L"test"; + EXPECT_PRINTF(fmt::format(L"{:p}", w), L"%p", w); + const wchar_t *null_wstr = FMT_NULL; + EXPECT_PRINTF(L"(nil)", L"%p", null_wstr); +} + +TEST(PrintfTest, Location) { + // TODO: test %n +} + +enum E { A = 42 }; + +TEST(PrintfTest, Enum) { + EXPECT_PRINTF("42", "%d", A); +} + +#if FMT_USE_FILE_DESCRIPTORS +TEST(PrintfTest, Examples) { + const char *weekday = "Thursday"; + const char *month = "August"; + int day = 21; + EXPECT_WRITE(stdout, fmt::printf("%1$s, %3$d %2$s", weekday, month, day), + "Thursday, 21 August"); +} + +TEST(PrintfTest, PrintfError) { + fmt::file read_end, write_end; + fmt::file::pipe(read_end, write_end); + int result = fmt::fprintf(read_end.fdopen("r").get(), "test"); + EXPECT_LT(result, 0); +} +#endif + +TEST(PrintfTest, WideString) { + EXPECT_EQ(L"abc", fmt::sprintf(L"%s", L"abc")); +} + +TEST(PrintfTest, PrintfCustom) { + EXPECT_EQ("abc", test_sprintf("%s", TestString("abc"))); +} + +TEST(PrintfTest, OStream) { + std::ostringstream os; + int ret = fmt::fprintf(os, "Don't %s!", "panic"); + EXPECT_EQ("Don't panic!", os.str()); + EXPECT_EQ(12, ret); +} + +TEST(PrintfTest, VPrintf) { + fmt::format_arg_store<fmt::printf_context, int> as{42}; + fmt::basic_format_args<fmt::printf_context> args(as); + EXPECT_EQ(fmt::vsprintf("%d", args), "42"); + EXPECT_WRITE(stdout, fmt::vprintf("%d", args), "42"); + EXPECT_WRITE(stdout, fmt::vfprintf(stdout, "%d", args), "42"); + EXPECT_WRITE(stdout, fmt::vfprintf(std::cout, "%d", args), "42"); +} + +template<typename... Args> +void check_format_string_regression(fmt::string_view s, const Args&... args) { + fmt::sprintf(s, args...); +} + +TEST(PrintfTest, CheckFormatStringRegression) { + check_format_string_regression("%c%s", 'x', ""); +} + +TEST(PrintfTest, VSPrintfMakeArgsExample) { + fmt::format_arg_store<fmt::printf_context, int, const char *> as{ + 42, "something"}; + fmt::basic_format_args<fmt::printf_context> args(as); + EXPECT_EQ( + "[42] something happened", fmt::vsprintf("[%d] %s happened", args)); + auto as2 = fmt::make_printf_args(42, "something"); + fmt::basic_format_args<fmt::printf_context> args2(as2); + EXPECT_EQ( + "[42] something happened", fmt::vsprintf("[%d] %s happened", args2)); + //the older gcc versions can't cast the return value +#if !defined(__GNUC__) || (__GNUC__ > 4) + EXPECT_EQ( + "[42] something happened", + fmt::vsprintf( + "[%d] %s happened", fmt::make_printf_args(42, "something"))); +#endif +} + +TEST(PrintfTest, VSPrintfMakeWArgsExample) { + fmt::format_arg_store<fmt::wprintf_context, int, const wchar_t *> as{ + 42, L"something"}; + fmt::basic_format_args<fmt::wprintf_context> args(as); + EXPECT_EQ( + L"[42] something happened", + fmt::vsprintf(L"[%d] %s happened", args)); + auto as2 = fmt::make_wprintf_args(42, L"something"); + fmt::basic_format_args<fmt::wprintf_context> args2(as2); + EXPECT_EQ( + L"[42] something happened", fmt::vsprintf(L"[%d] %s happened", args2)); + // the older gcc versions can't cast the return value +#if !defined(__GNUC__) || (__GNUC__ > 4) + EXPECT_EQ( + L"[42] something happened", + fmt::vsprintf( + L"[%d] %s happened", fmt::make_wprintf_args(42, L"something"))); +#endif +} |