From 54b1b8b1d39bad6edbc2e4359142a98feefb2ab7 Mon Sep 17 00:00:00 2001
From: Victor Tseng <palatis@gmail.com>
Date: Mon, 12 Dec 2016 07:32:55 +0800
Subject: [PATCH] const correctness (#89)

make IPAddress.toString() const method, it doesn't modify anything
within the class.
---
 cores/esp32/IPAddress.cpp | 4 ++--
 cores/esp32/IPAddress.h   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/cores/esp32/IPAddress.cpp b/cores/esp32/IPAddress.cpp
index f932d7bf..cabfdf32 100644
--- a/cores/esp32/IPAddress.cpp
+++ b/cores/esp32/IPAddress.cpp
@@ -72,7 +72,7 @@ size_t IPAddress::printTo(Print& p) const
     return n;
 }
 
-String IPAddress::toString()
+String IPAddress::toString() const
 {
     char szRet[16];
     sprintf(szRet,"%u.%u.%u.%u", _address.bytes[0], _address.bytes[1], _address.bytes[2], _address.bytes[3]);
@@ -119,4 +119,4 @@ bool IPAddress::fromString(const char *address)
     }
     _address.bytes[3] = acc;
     return true;
-}
\ No newline at end of file
+}
diff --git a/cores/esp32/IPAddress.h b/cores/esp32/IPAddress.h
index 7c48b673..aa1d10ce 100644
--- a/cores/esp32/IPAddress.h
+++ b/cores/esp32/IPAddress.h
@@ -81,7 +81,7 @@ public:
     IPAddress& operator=(uint32_t address);
 
     virtual size_t printTo(Print& p) const;
-    String toString();
+    String toString() const;
 
     friend class EthernetClass;
     friend class UDP;