Split out the StreamEndStop helper into its own header

src/CMakeLists.txt

@@ -109,6 +109,7 @@ set(INTERNAL_HEADERS
     ${SOURCES_DIR}/internal/catch_singletons.hpp
     ${SOURCES_DIR}/internal/catch_startup_exception_registry.hpp
     ${SOURCES_DIR}/internal/catch_stream.hpp
+    ${SOURCES_DIR}/internal/catch_stream_end_stop.hpp
     ${SOURCES_DIR}/internal/catch_string_manip.hpp
     ${SOURCES_DIR}/internal/catch_stringref.hpp
     ${SOURCES_DIR}/catch_tag_alias.hpp

src/catch2/catch_all.hpp

@@ -83,6 +83,7 @@
 #include <catch2/internal/catch_singletons.hpp>
 #include <catch2/internal/catch_startup_exception_registry.hpp>
 #include <catch2/internal/catch_stream.hpp>
+#include <catch2/internal/catch_stream_end_stop.hpp>
 #include <catch2/internal/catch_string_manip.hpp>
 #include <catch2/internal/catch_stringref.hpp>
 #include <catch2/internal/catch_tag_alias_registry.hpp>

src/catch2/catch_message.hpp

@@ -9,8 +9,8 @@
 #define CATCH_MESSAGE_HPP_INCLUDED
 
 #include <catch2/internal/catch_result_type.hpp>
-#include <catch2/internal/catch_common.hpp>
 #include <catch2/internal/catch_stream.hpp>
+#include <catch2/internal/catch_stream_end_stop.hpp>
 #include <catch2/internal/catch_message_info.hpp>
 #include <catch2/interfaces/catch_interfaces_capture.hpp>
 #include <catch2/catch_tostring.hpp>
@@ -20,6 +20,8 @@
 
 namespace Catch {
 
+    struct SourceLineInfo;
+
     struct MessageStream {
 
         template<typename T>

src/catch2/internal/catch_common.hpp

@@ -9,7 +9,6 @@
 #define CATCH_COMMON_HPP_INCLUDED
 
 #include <catch2/internal/catch_compiler_capabilities.hpp>
-#include <catch2/internal/catch_stringref.hpp>
 
 #define INTERNAL_CATCH_UNIQUE_NAME_LINE2( name, line ) name##line
 #define INTERNAL_CATCH_UNIQUE_NAME_LINE( name, line ) INTERNAL_CATCH_UNIQUE_NAME_LINE2( name, line )
@@ -49,21 +48,6 @@ namespace Catch {
     // This is necessary because the overload of operator<< above makes
     // lookup stop at namespace Catch
     using ::operator<<;
-
-    // Use this in variadic streaming macros to allow
-    //    >> +StreamEndStop
-    // as well as
-    //    >> stuff +StreamEndStop
-    struct StreamEndStop {
-        StringRef operator+() const {
-            return StringRef();
-        }
-
-        template<typename T>
-        friend T const& operator + ( T const& value, StreamEndStop ) {
-            return value;
-        }
-    };
 }
 
 #define CATCH_INTERNAL_LINEINFO \

src/catch2/internal/catch_stream_end_stop.hpp

@@ -0,0 +1,30 @@
+
+//              Copyright Catch2 Authors
+// Distributed under the Boost Software License, Version 1.0.
+//   (See accompanying file LICENSE_1_0.txt or copy at
+//        https://www.boost.org/LICENSE_1_0.txt)
+
+// SPDX-License-Identifier: BSL-1.0
+#ifndef CATCH_STREAM_END_STOP_HPP_INCLUDED
+#define CATCH_STREAM_END_STOP_HPP_INCLUDED
+
+#include <catch2/internal/catch_stringref.hpp>
+
+namespace Catch {
+
+    // Use this in variadic streaming macros to allow
+    //    << +StreamEndStop
+    // as well as
+    //    << stuff +StreamEndStop
+    struct StreamEndStop {
+        StringRef operator+() const { return StringRef(); }
+
+        template <typename T>
+        friend T const& operator+( T const& value, StreamEndStop ) {
+            return value;
+        }
+    };
+
+} // namespace Catch
+
+#endif // CATCH_STREAM_END_STOP_HPP_INCLUDED