Common/String: Support constructing from string_view

src/common/string.cpp

@@ -166,6 +166,11 @@ String::String(String&& moveString)
   Assign(moveString);
 }
 
+String::String(const std::string_view& sv)
+{
+  AppendString(sv.data(), static_cast<u32>(sv.size()));
+}
+
 String::~String()
 {
   StringDataRelease(m_pStringData);

src/common/string.h

@@ -54,6 +54,9 @@ public:
   // Construct a string from a data object, does not increment the reference count on the string data, use carefully.
   explicit String(StringData* pStringData) : m_pStringData(pStringData) {}
 
+  // Creates string from string_view.
+  String(const std::string_view& sv);
+
   // Destructor. Child classes may not have any destructors, as this is not virtual.
   ~String();
 
@@ -307,6 +310,12 @@ public:
     Assign(copyString.GetCharArray());
   }
 
+  StackString(const std::string_view& sv) : String(&m_sStringData)
+  {
+    InitStackStringData();
+    AppendString(sv.data(), static_cast<u32>(sv.size()));
+  }
+
   // Override the fromstring method
   static StackString FromFormat(const char* FormatString, ...)
   {