Inhibit protocol names for not-included protocols

src/IRmacros.h

@@ -0,0 +1,32 @@
+#ifndef IRMACROS_H_
+#define IRMACROS_H_
+/****************************************************************
+ * Copyright 2022 IRremoteESP8266 project and others
+ */
+/// @file IRmacros.h
+
+/**
+ * COND() Set of macros to facilitate single-line conditional compilation
+ * argument checking.
+ * Found here: https://www.reddit.com/r/C_Programming/comments/ud3xrv/
+ * conditional_preprocessor_macro_anyone/
+ * 
+ * Usage:
+ * COND(<define_to_test>[||/&&<more_define>...], <true_result>, <false_result>)
+ */
+/// @cond TEST
+#define NOTHING
+#define EXPAND(...) __VA_ARGS__
+#define STUFF_P(a, ...) __VA_OPT__(a)
+#define STUFF(...) STUFF_P(__VA_ARGS__)
+#define VA_TEST_P(a, ...) __VA_OPT__(NO)##THING
+#define VA_TEST(...) VA_TEST_P(__VA_ARGS__)
+#define NEGATE(a) VA_TEST(a, a)
+#define COND_P(cond, a, b) STUFF(a, cond)STUFF(b, NEGATE(cond))
+#define COND(cond, a, b) EXPAND(COND_P(cond, a, b))
+/// @endcond
+/**
+ * end of COND() set of macros
+ */
+
+#endif  // IRMACROS_H_

src/IRremoteESP8266.h

@@ -52,6 +52,8 @@
 #include <string>
 #endif  // UNIT_TEST
 
+#include "IRmacros.h"
+
 // Library Version Information
 // Major version number (X.x.x)
 #define _IRREMOTEESP8266_VERSION_MAJOR 2