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add support for statically named arguments with FMT_STRING

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This commit is contained in:
Alexey Ochapov
2021-05-13 03:57:07 +03:00
committed by Victor Zverovich
parent ea94d6d93c
commit 54f22a3eef
4 changed files with 67 additions and 31 deletions
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17
test/format-test.cc
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@@ -1694,6 +1694,14 @@ TEST(format_test, compile_time_string) {
EXPECT_EQ(L"42", fmt::format(FMT_STRING(L"{}"), 42));
EXPECT_EQ("foo", fmt::format(FMT_STRING("{}"), string_like()));
#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
using namespace fmt::literals;
EXPECT_EQ("foobar", fmt::format(FMT_STRING("{foo}{bar}"), "bar"_a = "bar",
"foo"_a = "foo"));
EXPECT_EQ("", fmt::format(FMT_STRING("")));
EXPECT_EQ("", fmt::format(FMT_STRING(""), "arg"_a = 42));
#endif
(void)static_with_null;
(void)static_with_null_wide;
(void)static_no_null;
@@ -2339,8 +2347,15 @@ TEST(format_test, format_string_errors) {
# else
fmt::print("warning: constexpr is broken in this version of MSVC\n");
# endif
EXPECT_ERROR("{foo", "compile-time checks don't support named arguments",
# if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
EXPECT_ERROR("{foo}", "named argument is not found", decltype("bar"_a = 42));
EXPECT_ERROR("{foo}", "named argument is not found",
decltype(fmt::arg("foo", 42)));
# else
EXPECT_ERROR("{foo}",
"compile-time checks for named arguments require C++20 support",
int);
# endif
EXPECT_ERROR_NOARGS("{10000000000}", "number is too big");
EXPECT_ERROR_NOARGS("{0x}", "invalid format string");
EXPECT_ERROR_NOARGS("{-}", "invalid format string");