Remove forceful "using namespace arduino" from headers

facchinm · facchinm · commit d6a26326a9c7 · 2021-03-29T11:50:32.000+02:00
First step to fix arduino/ArduinoCore-samd#606
diff --git a/api/Print.h b/api/Print.h
@@ -93,4 +93,4 @@ class Print
 };
 
 }
-using namespace arduino;
+using arduino::Print;
diff --git a/api/String.h b/api/String.h
@@ -255,5 +255,7 @@ class StringSumHelper : public String
 
 } // namespace arduino
 
+using arduino::__FlashStringHelper;
+
 #endif  // __cplusplus
 #endif  // __ARDUINO_STRINGS__
diff --git a/api/Udp.h b/api/Udp.h
@@ -87,6 +87,4 @@ class UDP : public Stream {
   uint8_t* rawIPAddress(IPAddress& addr) { return addr.raw_address(); };
 };
 
-}
-
-using namespace arduino;
+}
