Add flat_static_buffer::reset

CHANGELOG.md

@@ -1,6 +1,7 @@
 Version 106:
 
 * Dynamic buffer input areas are mutable
+* Add flat_static_buffer::reset
 
 --------------------------------------------------------------------------------
 

include/boost/beast/core/flat_static_buffer.hpp

@@ -114,6 +114,10 @@ public:
     mutable_data_type
     mutable_data();
 
+    /// Set the input and output sequences to size 0
+    void
+    reset();
+
     /** Get a list of buffers that represent the output sequence, with the given size.
 
         @throws std::length_error if the size would exceed the limit
@@ -147,10 +151,10 @@ protected:
     /** Constructor
 
         The buffer will be in an undefined state. It is necessary
-        for the derived class to call @ref reset in order to
-        initialize the object.
+        for the derived class to call @ref reset with a pointer
+        and size in order to initialize the object.
     */
-    flat_static_buffer_base();
+    flat_static_buffer_base() = default;
 
     /** Reset the pointed-to buffer.
 
@@ -175,6 +179,10 @@ private:
         return static_cast<std::size_t>(last - first);
     }
 
+    template<class = void>
+    void
+    reset_impl();
+
     template<class = void>
     void
     reset_impl(void* p, std::size_t n);

include/boost/beast/core/impl/flat_static_buffer.ipp

@@ -44,6 +44,14 @@ mutable_data() ->
     return {in_, dist(in_, out_)};
 }
 
+inline
+void
+flat_static_buffer_base::
+reset()
+{
+    reset_impl();
+}
+
 inline
 auto
 flat_static_buffer_base::
@@ -61,6 +69,16 @@ reset(void* p, std::size_t n)
     reset_impl(p, n);
 }
 
+template<class>
+void
+flat_static_buffer_base::
+reset_impl()
+{
+    in_ = begin_;
+    out_ = begin_;
+    last_ = begin_;
+}
+
 template<class>
 void
 flat_static_buffer_base::