Fix forward declaration of FS

Author: igrr

hardware/esp8266com/esp8266/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp

@@ -24,8 +24,8 @@
 #include <Arduino.h>
 #include "WiFiServer.h"
 #include "WiFiClient.h"
-#include "FS.h"
 #include "ESP8266WebServer.h"
+#include "FS.h"
 #include "detail/RequestHandler.h"
 // #define DEBUG
 #define DEBUG_OUTPUT Serial
@@ -181,7 +181,7 @@ void ESP8266WebServer::sendContent(const String& content) {
   const size_t unit_size = HTTP_DOWNLOAD_UNIT_SIZE;
   size_t size_to_send = content.length();
   const char* send_start = content.c_str();
-  
+
   while (size_to_send) {
     size_t will_send = (size_to_send < unit_size) ? size_to_send : unit_size;
     size_t sent = _currentClient.write(send_start, will_send);

hardware/esp8266com/esp8266/libraries/ESP8266WebServer/src/ESP8266WebServer.h

@@ -38,7 +38,10 @@ enum HTTPUploadStatus { UPLOAD_FILE_START, UPLOAD_FILE_WRITE, UPLOAD_FILE_END };
 #define CONTENT_LENGTH_NOT_SET ((size_t) -2)
 
 class RequestHandler;
+
+namespace fs {
 class FS;
+}
 
 typedef struct {
   HTTPUploadStatus status;
@@ -62,7 +65,7 @@ class ESP8266WebServer
   typedef std::function<void(void)> THandlerFunction;
   void on(const char* uri, THandlerFunction handler);
   void on(const char* uri, HTTPMethod method, THandlerFunction fn);
-  void serveStatic(const char* uri, FS& fs, const char* path);
+  void serveStatic(const char* uri, fs::FS& fs, const char* path);
   void onNotFound(THandlerFunction fn);  //called when handler is not assigned
   void onFileUpload(THandlerFunction fn); //handle file uploads