compilation warning cleanup

Author: Архипов Дмитрий

include/flags/flags.hpp

@@ -19,7 +19,7 @@ constexpr struct empty_t {
 } empty;
 
 
-template <class E> struct flags {
+template <class E> class flags {
 public:
   static_assert(is_flags<E>::value,
                 "flags::flags is disallowed for this type; "

include/flags/flagsfwd.hpp

@@ -2,7 +2,7 @@
 #define ENUM_CLASS_FLAGSFWD_HPP
 
 
-namespace flags { template <class E> struct flags; }
+namespace flags { template <class E> class flags; }
 
 
 #endif // ENUM_CLASS_FLAGSFWD_HPP

include/flags/iterator.hpp

@@ -38,7 +38,7 @@ class FlagsIterator {
   }
 
 
-  constexpr reference operator*() noexcept {
+  constexpr reference operator*() const noexcept {
     return static_cast<value_type>(mask_);
   }
 

test/should-compile.cpp

@@ -145,3 +145,13 @@ constexpr bool cf1 = ec1.empty();
 constexpr Enums::size_type cf2 = ec1.max_size();
 constexpr Enums::iterator cf3 = ec1.find(Enum::One);
 constexpr Enums::size_type cf4 = ec1.count(Enum::One);
+
+
+template <class... Ts> void ignore_variables(Ts&&...) {}
+
+void do_ignore_variables() {
+  ignore_variables(
+    vc1, vc2, l1, l2, l3, l4, b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11,
+    b12, b13, cv1, cf1, cf2, cf3, cf4
+  );
+}

test/shouldnt-compile/const-erase-iter.cpp

@@ -2,7 +2,7 @@
 
 
 void check() {
-  const Enums es1;
+  const auto es1 = Enums{};
   Enum arr[] = {Enum::One};
   es1.erase(arr);
 }

test/shouldnt-compile/const-set-uv.cpp

@@ -2,6 +2,6 @@
 
 
 void check() {
-  const Enums es1;
+  const auto es1 = Enums{};
   es1.set_underlying_value(1);
 }