Refactor TSTL headers

tstl/include/cstring.hpp

@@ -0,0 +1,25 @@
+//=======================================================================
+// Copyright Baptiste Wicht 2013-2018.
+// Distributed under the terms of the MIT License.
+// (See accompanying file LICENSE or copy at
+//  http://www.opensource.org/licenses/MIT)
+//=======================================================================
+
+#ifndef CSTRING_H
+#define CSTRING_H
+
+#include <types.hpp>
+
+namespace std {
+
+inline uint64_t str_len(const char* a){
+    uint64_t length = 0;
+    while(*a++){
+        ++length;
+    }
+    return length;
+}
+
+} //end of namespace std
+
+#endif

tstl/include/string.hpp

@@ -8,6 +8,7 @@
 #ifndef STRING_H
 #define STRING_H
 
+#include <cstring.hpp>
 #include <string_view.hpp>
 #include <types.hpp>
 #include <algorithms.hpp>
@@ -17,14 +18,6 @@
 
 namespace std {
 
-inline uint64_t str_len(const char* a){
-    uint64_t length = 0;
-    while(*a++){
-        ++length;
-    }
-    return length;
-}
-
 template<typename CharT>
 struct base_long {
     size_t capacity;

tstl/include/string_view.hpp

@@ -8,6 +8,7 @@
 #ifndef STRING_VIEW_H
 #define STRING_VIEW_H
 
+#include <cstring.hpp>
 #include <types.hpp>
 #include <algorithms.hpp>
 #include <iterator.hpp>