fix: printing of temporaries

Author: DNKpp

include/mimic++/Printer.hpp

@@ -285,20 +285,20 @@ namespace mimicpp::detail
 	template <print_iterator OutIter, format::detail::formattable<CharT> T>
 	OutIter print(
 		OutIter out,
-		T& value,
+		T&& value,
 		[[maybe_unused]] const priority_tag<1>
 	)
 	{
 		return format::format_to(
 			std::move(out),
 			"{}",
-			value);
+			std::forward<T>(value));
 	}
 
 	template <print_iterator OutIter>
 	OutIter print(
 		OutIter out,
-		auto&,
+		auto&&,
 		[[maybe_unused]] const priority_tag<0>
 	)
 	{

test/unit-tests/Printer.cpp

@@ -10,6 +10,7 @@
 #include <catch2/matchers/catch_matchers.hpp>
 #include <catch2/matchers/catch_matchers_string.hpp>
 
+#include <ranges>
 #include <sstream>
 
 using namespace mimicpp;
@@ -384,6 +385,19 @@ TEST_CASE(
 				std::move(stream).str(),
 				Catch::Matchers::Equals("{ {?}, {?}, {?} }"));
 		}
+
+		SECTION("Views are supported.")
+		{
+			const std::vector vec{42, 1337};
+
+			print(
+				std::ostreambuf_iterator{stream},
+				vec
+				| std::views::transform([](const auto v) { return 2 * v; }));
+			REQUIRE_THAT(
+				std::move(stream).str(),
+				Catch::Matchers::Equals("{ 84, 2674 }"));
+		}
 	}
 
 	SECTION("std::source_location has specialized printer.")
@@ -405,6 +419,30 @@ TEST_CASE(
 	}
 }
 
+TEST_CASE(
+	"print supports printing of temporaries.",
+	"[print]"
+)
+{
+	SECTION("Something printable.")
+	{
+		StringStreamT stream{};
+		print(std::ostreambuf_iterator{stream}, 42);
+		REQUIRE_THAT(
+			std::move(stream).str(),
+			Catch::Matchers::Equals("42"));
+	}
+
+	SECTION("Something non-printable.")
+	{
+		StringStreamT stream{};
+		print(std::ostreambuf_iterator{stream}, NonPrintable{});
+		REQUIRE_THAT(
+			std::move(stream).str(),
+			Catch::Matchers::Equals("{?}"));
+	}
+}
+
 TEST_CASE(
 	"ValueCategory is formattable.",
 	"[print]"