Remove constexpr

Author: martinmoene

README.md

@@ -120,8 +120,8 @@ Synopsis
 |           |– |– |   | const_reference |  |
 | Lifetime types |✓|– |   | cloner_type     |[2]: copier_type |
 |           |✓|✓|   | deleter_type    |  |
-| Construction   |✓|✓|   | constexpr value_ptr() noexcept |...   |
-|           |– |✓| C++11  | constexpr value_ptr( std::nullptr_t ) noexcept|... |
+| Construction   |✓|✓|   | value_ptr() noexcept |...   |
+|           |– |✓| C++11  | value_ptr( std::nullptr_t ) noexcept|... |
 |           |✓|– |   | value_ptr( pointer p ) noexcept |... |
 |           |✓|✓|   | value_ptr( value_ptr const & other ) |... |
 |           |✓|✓| C++11  | value_ptr( value_ptr && other ) noexcept |... |
@@ -151,7 +151,7 @@ Synopsis
 |           |✓|✓|   | reference operator*() const |... |
 |           |✓|✓|   | pointer operator->() const noexcept |... |
 |           |✓|✓| C++11  | explicit operator bool() const noexcept |... |
-| &nbsp;         |&ndash; |&ndash; |<C++11  | constexpr operator safe_bool() const noexcept |... |
+| &nbsp;         |&ndash; |&ndash; |<C++11  | operator safe_bool() const noexcept |... |
 | &nbsp;         |&ndash; |&ndash; | &nbsp; | bool has_value() const nsvp_noexcept |... |
 | &nbsp;         |&ndash; |&ndash; | &nbsp; | element_type const & value() const |... |
 | &nbsp;         |&ndash; |&ndash; | &nbsp; | element_type & value() |... |
@@ -249,8 +249,8 @@ Other value-ptr implementations
 Notes and references
 --------------------
 
-<a id="ref1"></a>[1] Gaetano Checinski. [value_ptr — The Missing C++ Smart-pointer](https://hackernoon.com/value-ptr-the-missing-c-smart-pointer-1f515664153e) ([GitHub](https://github.com/LoopPerfect/valuable)). May 2017.
-<a id="ref2"></a>[2] Andrey Upadyshev. [PIMPL, Rule of Zero and Scott Meyers](http://oliora.github.io/2015/12/29/pimpl-and-rule-of-zero.html) ([GitHub](https://github.com/oliora/samples/blob/master/spimpl.h)). December 29, 2015.
+<a id="ref1"></a>[1] Gaetano Checinski. [value_ptr — The Missing C++ Smart-pointer](https://hackernoon.com/value-ptr-the-missing-c-smart-pointer-1f515664153e) ([GitHub](https://github.com/LoopPerfect/valuable)). May 2017.  
+<a id="ref2"></a>[2] Andrey Upadyshev. [PIMPL, Rule of Zero and Scott Meyers](http://oliora.github.io/2015/12/29/pimpl-and-rule-of-zero.html) ([GitHub](https://github.com/oliora/samples/blob/master/spimpl.h)). December 29, 2015.  
 
 Appendix
 --------

include/nonstd/value_ptr.hpp

@@ -253,7 +253,7 @@ using std::default_delete;
 template< class T >
 struct default_delete
 {
-    nsvp_constexpr default_delete() nsvp_noexcept {};
+    default_delete() nsvp_noexcept {};
 
     void operator()( T * ptr ) const nsvp_noexcept
     {
@@ -523,12 +523,12 @@ class value_ptr
     ~value_ptr() = default;
 #endif
 
-    nsvp_constexpr value_ptr() nsvp_noexcept
+    value_ptr() nsvp_noexcept
     : ptr( cloner_type(), deleter_type() )
     {}
 
 #if nsvp_HAVE_NULLPTR
-    nsvp_constexpr value_ptr( std::nullptr_t ) nsvp_noexcept
+    value_ptr( std::nullptr_t ) nsvp_noexcept
     : ptr( cloner_type(), deleter_type() )
     {}
 #endif
@@ -715,7 +715,7 @@ class value_ptr
     void this_type_does_not_support_comparisons() const {}
 
 public:
-    nsvp_constexpr operator safe_bool() const nsvp_noexcept
+    operator safe_bool() const nsvp_noexcept
     {
         return has_value() ? &value_ptr::this_type_does_not_support_comparisons : 0;
     }
@@ -745,15 +745,15 @@ class value_ptr
 #if nsvp_CPP11_OR_GREATER
 
     template< class U >
-    nsvp_constexpr element_type value_or( U && v ) const
+    element_type value_or( U && v ) const
     {
         return has_value() ? value() : static_cast<element_type>(std::forward<U>( v ) );
     }
 
 #else
 
     template< class U >
-    nsvp_constexpr element_type value_or( U const & v ) const
+    element_type value_or( U const & v ) const
     {
         return has_value() ? value() : static_cast<element_type>( v );
     }