Suppress GCC warning (temporary), fix syntax error

Author: patrickroberts

CMakeLists.txt

@@ -68,6 +68,9 @@ include(GNUInstallDirs)
 
 add_library(beman.any_view INTERFACE)
 add_library(beman::any_view ALIAS beman.any_view)
+# TODO: implement non-template friend function and remove this suppression
+target_compile_options(
+  beman.any_view INTERFACE $<$<CXX_COMPILER_ID:GNU>:-Wno-non-template-friend>)
 target_include_directories(
   beman.any_view
   INTERFACE $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>

tests/beman/any_view/concepts.test.cpp

@@ -14,7 +14,7 @@ struct options {
 #elif BEMAN_ANY_VIEW_USE_NAMED()
 
 template <class IterConceptT>
-using options = beman::any_view::any_view_options options{
+inline constexpr beman::any_view::any_view_options options{
     .reference_type   = beman::any_view::type<int&>,
     .iterator_concept = beman::any_view::type<IterConceptT>,
 };