Don't apply the MSVC workaround for clang or gcc

Resolves hsutter#1304 
On Windows, clang defines `_MSC_VER`, so the MSVC workaround needs to not happen when the clang define is set.


Signed-off-by: gregmarr <[email protected]>

Author: gregmarr

include/cpp2util.h

@@ -368,7 +368,7 @@ constexpr auto gcc_clang_msvc_min_versions(
 }
 
 
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) && !defined(__clang_major__) && !defined(__GNUC__)
    // MSVC can't handle 'inline constexpr' variables yet in all cases
     #define CPP2_CONSTEXPR const
 #else
@@ -2601,7 +2601,7 @@ range(
 ) -> range<std::common_type_t<T, U>>;
 
 template<typename T>
-constexpr auto contains(range<T> const& r, auto const& t)
+constexpr auto contains(range<T> const& r, T const& t)
     -> bool
 {
     if (r.empty()) {
@@ -2711,64 +2711,6 @@ inline auto fopen( const char* filename, const char* mode ) {
 
 
 
-
-//-----------------------------------------------------------------------
-//
-//  "Unchecked" opt-outs for safety checks
-//
-//-----------------------------------------------------------------------
-//
-
-CPP2_FORCE_INLINE constexpr auto unchecked_cmp_less(auto&& t, auto&& u) 
-    -> decltype(auto)
-    requires requires {CPP2_FORWARD(t) < CPP2_FORWARD(u);}
-{
-    return CPP2_FORWARD(t) < CPP2_FORWARD(u);
-}
-
-CPP2_FORCE_INLINE constexpr auto unchecked_cmp_less_eq(auto&& t, auto&& u) 
-    -> decltype(auto)
-    requires requires {CPP2_FORWARD(t) <= CPP2_FORWARD(u);}
-{
-    return CPP2_FORWARD(t) <= CPP2_FORWARD(u);
-}
-
-CPP2_FORCE_INLINE constexpr auto unchecked_cmp_greater(auto&& t, auto&& u) 
-    -> decltype(auto)
-    requires requires {CPP2_FORWARD(t) > CPP2_FORWARD(u);}
-{
-    return CPP2_FORWARD(t) > CPP2_FORWARD(u);
-}
-
-CPP2_FORCE_INLINE constexpr auto unchecked_cmp_greater_eq(auto&& t, auto&& u) 
-    -> decltype(auto)
-    requires requires {CPP2_FORWARD(t) >= CPP2_FORWARD(u);}
-{
-    return CPP2_FORWARD(t) >= CPP2_FORWARD(u);
-}
-
-CPP2_FORCE_INLINE constexpr auto unchecked_div(auto&& t, auto&& u) 
-    -> decltype(auto)
-    requires requires {CPP2_FORWARD(t) / CPP2_FORWARD(u);}
-{
-    return CPP2_FORWARD(t) / CPP2_FORWARD(u);
-}
-
-CPP2_FORCE_INLINE constexpr auto unchecked_dereference(auto&& p) 
--> decltype(auto)
-    requires requires {*CPP2_FORWARD(p);}
-{
-    return *CPP2_FORWARD(p);
-}
-
-CPP2_FORCE_INLINE constexpr auto unchecked_subscript(auto&& a, auto&& b) 
-    -> decltype(auto)
-    requires requires {CPP2_FORWARD(a)[b];}
-{
-    return CPP2_FORWARD(a)[b];
-}
-
-
 namespace impl {
 
 //-----------------------------------------------------------------------
@@ -2787,8 +2729,7 @@ CPP2_FORCE_INLINE constexpr auto cmp_mixed_signedness_check() -> void
     {
         static_assert(
             program_violates_type_safety_guarantee<T, U>,
-            "comparing bool values using < <= >= > is unsafe and not allowed - are you missing parentheses?"
-            );
+            "comparing bool values using < <= >= > is unsafe and not allowed - are you missing parentheses?");
     }
     else if constexpr (
         std::is_integral_v<T> &&
@@ -2804,22 +2745,20 @@ CPP2_FORCE_INLINE constexpr auto cmp_mixed_signedness_check() -> void
         //  static_assert to reject the comparison is the right way to go.
         static_assert(
             program_violates_type_safety_guarantee<T, U>,
-            "mixed signed/unsigned comparison is unsafe - prefer using .ssize() instead of .size(), consider using std::cmp_less or similar instead, or consider explicitly casting one of the values to change signedness by using 'as' or 'cpp2::unchecked_narrow'"
+            "mixed signed/unsigned comparison is unsafe - prefer using .ssize() instead of .size(), consider using std::cmp_less instead, or consider explicitly casting one of the values to change signedness by using 'as' or 'cpp2::unchecked_narrow'"
             );
     }
 }
 
 
-CPP2_FORCE_INLINE constexpr auto cmp_less(auto&& t, auto&& u) 
-    -> decltype(auto)
+CPP2_FORCE_INLINE constexpr auto cmp_less(auto&& t, auto&& u) -> decltype(auto)
     requires requires {CPP2_FORWARD(t) < CPP2_FORWARD(u);}
 {
     cmp_mixed_signedness_check<CPP2_TYPEOF(t), CPP2_TYPEOF(u)>();
     return CPP2_FORWARD(t) < CPP2_FORWARD(u);
 }
 
-CPP2_FORCE_INLINE constexpr auto cmp_less(auto&& t, auto&& u) 
-    -> decltype(auto)
+CPP2_FORCE_INLINE constexpr auto cmp_less(auto&& t, auto&& u) -> decltype(auto)
 {
     static_assert(
         program_violates_type_safety_guarantee<decltype(t), decltype(u)>,
@@ -2829,16 +2768,14 @@ CPP2_FORCE_INLINE constexpr auto cmp_less(auto&& t, auto&& u)
 }
 
 
-CPP2_FORCE_INLINE constexpr auto cmp_less_eq(auto&& t, auto&& u) 
-    -> decltype(auto)
+CPP2_FORCE_INLINE constexpr auto cmp_less_eq(auto&& t, auto&& u) -> decltype(auto)
     requires requires {CPP2_FORWARD(t) <= CPP2_FORWARD(u);}
 {
     cmp_mixed_signedness_check<CPP2_TYPEOF(t), CPP2_TYPEOF(u)>();
     return CPP2_FORWARD(t) <= CPP2_FORWARD(u);
 }
 
-CPP2_FORCE_INLINE constexpr auto cmp_less_eq(auto&& t, auto&& u) 
-    -> decltype(auto)
+CPP2_FORCE_INLINE constexpr auto cmp_less_eq(auto&& t, auto&& u) -> decltype(auto)
 {
     static_assert(
         program_violates_type_safety_guarantee<decltype(t), decltype(u)>,
@@ -2848,16 +2785,14 @@ CPP2_FORCE_INLINE constexpr auto cmp_less_eq(auto&& t, auto&& u)
 }
 
 
-CPP2_FORCE_INLINE constexpr auto cmp_greater(auto&& t, auto&& u) 
-    -> decltype(auto)
+CPP2_FORCE_INLINE constexpr auto cmp_greater(auto&& t, auto&& u) -> decltype(auto)
     requires requires {CPP2_FORWARD(t) > CPP2_FORWARD(u);}
 {
     cmp_mixed_signedness_check<CPP2_TYPEOF(t), CPP2_TYPEOF(u)>();
     return CPP2_FORWARD(t) > CPP2_FORWARD(u);
 }
 
-CPP2_FORCE_INLINE constexpr auto cmp_greater(auto&& t, auto&& u) 
-    -> decltype(auto)
+CPP2_FORCE_INLINE constexpr auto cmp_greater(auto&& t, auto&& u) -> decltype(auto)
 {
     static_assert(
         program_violates_type_safety_guarantee<decltype(t), decltype(u)>,
@@ -2867,16 +2802,14 @@ CPP2_FORCE_INLINE constexpr auto cmp_greater(auto&& t, auto&& u)
 }
 
 
-CPP2_FORCE_INLINE constexpr auto cmp_greater_eq(auto&& t, auto&& u) 
-    -> decltype(auto)
+CPP2_FORCE_INLINE constexpr auto cmp_greater_eq(auto&& t, auto&& u) -> decltype(auto)
     requires requires {CPP2_FORWARD(t) >= CPP2_FORWARD(u);}
 {
     cmp_mixed_signedness_check<CPP2_TYPEOF(t), CPP2_TYPEOF(u)>();
     return CPP2_FORWARD(t) >= CPP2_FORWARD(u);
 }
 
-CPP2_FORCE_INLINE constexpr auto cmp_greater_eq(auto&& t, auto&& u) 
-    -> decltype(auto)
+CPP2_FORCE_INLINE constexpr auto cmp_greater_eq(auto&& t, auto&& u) -> decltype(auto)
 {
     static_assert(
         program_violates_type_safety_guarantee<decltype(t), decltype(u)>,