Condition the NTTP tests on __cpp_nontype_template_args

gennaroprota · gennaroprota · commit 328752ed8ce4 · 2025-12-19T17:27:03.000+01:00
They were conditioned on detection of C++20 via __cplusplus, but Clang
10 and 11 don't support class types as NTTP, even though they report
C++20 via __cplusplus when -std=c++20 is used.
diff --git a/test/constexpr_tests.hpp b/test/constexpr_tests.hpp
@@ -666,7 +666,7 @@ testConstantEvaluation()
 #endif
 }
 
-#ifdef BOOST_STATIC_STRING_CPP20
+#if __cpp_nontype_template_args >= 201911L
 
 template<basic_static_string<32, char, cxper_char_traits> X>
 struct nttp_primary

Original file line number	Diff line number	Diff line change
`@@ -666,7 +666,7 @@ testConstantEvaluation()`
`666`	`666`	`#endif`
`667`	`667`	`}`
`668`	`668`
`669`		`-#ifdef BOOST_STATIC_STRING_CPP20`
	`669`	`+#if __cpp_nontype_template_args >= 201911L`
`670`	`670`
`671`	`671`	`template<basic_static_string<32, char, cxper_char_traits> X>`
`672`	`672`	`struct nttp_primary`