Skip std::format tests on unsupported platforms

Author: mochaaP

tests/proxy_dispatch_tests.cpp

@@ -829,6 +829,7 @@ TEST(ProxyDispatchTests, TestFreeAsMemDispatch) {
 }
 
 TEST(ProxyDispatchTests, TestSubstitutionDispatch) {
+#if __cpp_lib_format
   struct Base : pro::facade_builder              //
                 ::add_skill<pro::skills::format> //
                 ::build {};
@@ -844,4 +845,7 @@ TEST(ProxyDispatchTests, TestSubstitutionDispatch) {
   pro::proxy<Base> p3 = std::move(p1);
   ASSERT_FALSE(p1.has_value());
   ASSERT_EQ(std::format("{}", *p3), "123");
+#else
+  GTEST_SKIP() << "std::format not available";
+#endif // __cpp_lib_format
 }

tests/proxy_format_tests.cpp

@@ -4,6 +4,7 @@
 #include <gtest/gtest.h>
 #include <proxy/proxy.h>
 
+#if __cpp_lib_format
 namespace proxy_format_tests_details {
 
 struct NonFormattable : pro::facade_builder::build {};
@@ -29,17 +30,26 @@ static_assert(
 } // namespace proxy_format_tests_details
 
 namespace details = proxy_format_tests_details;
+#endif // __cpp_lib_format
 
 TEST(ProxyFormatTests, TestFormat) {
+#if __cpp_lib_format
   int v = 123;
   pro::proxy<details::Formattable> p = &v;
   ASSERT_EQ(std::format("{}", *p), "123");
   ASSERT_EQ(std::format("{:*<6}", *p), "123***");
+#else
+  GTEST_SKIP() << "std::format not available";
+#endif // __cpp_lib_format
 }
 
 TEST(ProxyFormatTests, TestWformat) {
+#if __cpp_lib_format
   int v = 123;
   pro::proxy<details::Formattable> p = &v;
   ASSERT_EQ(std::format(L"{}", *p), L"123");
   ASSERT_EQ(std::format(L"{:*<6}", *p), L"123***");
+#else
+  GTEST_SKIP() << "std::format not available";
+#endif // __cpp_lib_format
 }