Renamed callback build macros

src/BuildOpt.h

@@ -889,17 +889,17 @@
  * Come one, come all and witness the horror:
  * Variadics, forced expansions, inlined function, string concatenation, and it even messes up access specifiers.
  */
-#define FIRST(arg, ...) arg
-#define REST(arg, ...) __VA_ARGS__
-#define EXP(...) __VA_ARGS__
+#define RADIOLIB_FIRST(arg, ...) arg
+#define RADIOLIB_REST(arg, ...) __VA_ARGS__
+#define RADIOLIB_EXP(...) __VA_ARGS__
 
 #define RADIOLIB_GENERATE_CALLBACK_RET_FUNC(RET, FUNC, ...) public: typedef RET (*FUNC##_cb_t)(__VA_ARGS__); void setCb_##FUNC(FUNC##_cb_t cb) { cb_##FUNC = cb; }; private: FUNC##_cb_t cb_##FUNC;
 #define RADIOLIB_GENERATE_CALLBACK_RET(RET, ...) RADIOLIB_GENERATE_CALLBACK_RET_FUNC(RET, __VA_ARGS__)
-#define RADIOLIB_GENERATE_CALLBACK(CB) RADIOLIB_GENERATE_CALLBACK_RET(EXP(FIRST CB), EXP(REST CB))
+#define RADIOLIB_GENERATE_CALLBACK(CB) RADIOLIB_GENERATE_CALLBACK_RET(RADIOLIB_EXP(RADIOLIB_FIRST CB), RADIOLIB_EXP(RADIOLIB_REST CB))
 
 #define RADIOLIB_GENERATE_CALLBACK_SPI_RET_FUNC(RET, FUNC, ...) public: typedef RET (Module::*FUNC##_cb_t)(__VA_ARGS__); void setCb_##FUNC(FUNC##_cb_t cb) { cb_##FUNC = cb; }; private: FUNC##_cb_t cb_##FUNC;
 #define RADIOLIB_GENERATE_CALLBACK_SPI_RET(RET, ...) RADIOLIB_GENERATE_CALLBACK_SPI_RET_FUNC(RET, __VA_ARGS__)
-#define RADIOLIB_GENERATE_CALLBACK_SPI(CB) RADIOLIB_GENERATE_CALLBACK_SPI_RET(EXP(FIRST CB), EXP(REST CB))
+#define RADIOLIB_GENERATE_CALLBACK_SPI(CB) RADIOLIB_GENERATE_CALLBACK_SPI_RET(RADIOLIB_EXP(RADIOLIB_FIRST CB), RADIOLIB_EXP(RADIOLIB_REST CB))
 
 /*!
   \brief Macro to check variable is within constraints - this is commonly used to check parameter ranges. Requires RADIOLIB_CHECK_RANGE to be enabled