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Convert 'char8_t' character sequences to 'char' sequences #1505

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Jan 4, 2020
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Convert 'char8_t' character sequences to 'char' sequences #1505

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20 changes: 16 additions & 4 deletions test/format-test.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -2476,15 +2476,27 @@ TEST(FormatTest, FmtStringInTemplate) {
using fmt::char8_t;
#endif

// Convert 'char8_t' character sequences to 'char' sequences
// Otherwise GTest will insist on inserting 'char8_t' NTBS into a 'char' stream,
// but basic_ostream<char>::operator<< overloads taking 'char8_t' arguments
// are defined as deleted by P1423.
// Handling individual 'char8_t's is done inline.
std::string from_u8str(const std::basic_string<char8_t>& str) {
return std::string(str.begin(), str.end());
}
std::string from_u8str(const fmt::basic_string_view<char8_t>& str) {
return std::string(str.begin(), str.end());
}

#if FMT_USE_USER_DEFINED_LITERALS
TEST(FormatTest, U8StringViewLiteral) {
using namespace fmt::literals;
fmt::basic_string_view<char8_t> s = "ab"_u;
EXPECT_EQ(s.size(), 2u);
const char8_t* data = s.data();
EXPECT_EQ(data[0], 'a');
EXPECT_EQ(data[1], 'b');
EXPECT_EQ(format("{:*^5}"_u, "🤡"_u), "**🤡**"_u);
EXPECT_EQ(char(data[0]), 'a');
EXPECT_EQ(char(data[1]), 'b');
EXPECT_EQ(from_u8str(format("{:*^5}"_u, "🤡"_u)), from_u8str("**🤡**"_u));
}
#endif

Expand Down Expand Up @@ -2533,5 +2545,5 @@ TEST(FormatTest, FormatUTF8Precision) {
auto result = fmt::format(format, str);
EXPECT_EQ(fmt::internal::count_code_points(result), 4);
EXPECT_EQ(result.size(), 5);
EXPECT_EQ(result, str.substr(0, 5));
EXPECT_EQ(from_u8str(result), from_u8str(str.substr(0, 5)));
}