better subview

fix #708
boostorg · May 26, 2022 · bc64ded · bc64ded
1 parent c4ab4dd
commit bc64ded
Showing 1 changed file with 12 additions and 2 deletions.
diff --git a/include/boost/json/string.hpp b/include/boost/json/string.hpp
@@ -2246,13 +2246,23 @@ class string
 
         @throw std::out_of_range `pos > size()`
     */
+    /**@{*/
     string_view
     subview(
-        std::size_t pos = 0,
+        std::size_t pos,
         std::size_t count = npos) const
     {
-        return string_view(*this).substr(pos, count);
+        return subview().substr(pos, count);
+    }
+
+    // this is a faster, leaner, noexcept
+    // version of subview() with no args
+    string_view
+    subview() const noexcept
+    {
+        return string_view( data(), size() );
     }
+    /**@}*/
 
     //------------------------------------------------------