add char8_t test

Author: dalle

tests/BUILD.bazel

@@ -98,8 +98,8 @@ cc_test(
 )
 
 cc_test(
-    name = "unicode_test",
-    srcs = ["unicode_test.cpp"],
+    name = "supported_chars_test",
+    srcs = ["supported_chars_test.cpp"],
     deps = [
         "//:fast_float",
         "@doctest//doctest",

tests/CMakeLists.txt

@@ -68,7 +68,7 @@ endfunction(fast_float_add_cpp_test)
 
 fast_float_add_cpp_test(rcppfastfloat_test)
 fast_float_add_cpp_test(wide_char_test)
-fast_float_add_cpp_test(unicode_test)
+fast_float_add_cpp_test(supported_chars_test)
 fast_float_add_cpp_test(example_test)
 fast_float_add_cpp_test(example_comma_test)
 fast_float_add_cpp_test(basictest)

tests/unicode_test.cpp renamed to tests/supported_chars_test.cpp

@@ -31,6 +31,13 @@ int main() {
     return EXIT_FAILURE;
   }
 
+#ifdef __cpp_char8_t
+  if (!test<char8_t>("4.2", 4.2)) {
+    std::cout << "test failure for char8_t" << std::endl;
+    return EXIT_FAILURE;
+  }
+#endif
+
   if (!test<char16_t>("4.2", 4.2)) {
     std::cout << "test failure for char16_t" << std::endl;
     return EXIT_FAILURE;