synth_shed.h make ansi c++ compatible

gen/src/synth_shed/synth_shed.h

@@ -1,18 +1,23 @@
 #ifndef SYNTH_SHED_H
 #define SYNTH_SHED_H
 
-// Types
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+// Types (as forward declarations)
 // != 0 means ERR
 typedef int SYNTH_STATUS;
-typedef enum _filtertype filtertype_t;
 typedef struct _synth synth_t;
 typedef synth_t synth;
+
 // Enums
-enum _filtertype {
+typedef enum _filtertype {
     HPF,
     LPF,
     BPF
-};
+} filtertype_t;
 
 typedef enum _tech {
     ANALOG,
@@ -25,7 +30,6 @@ typedef struct _filter {
     filtertype_t type;
 } filter_t;
 
-
 struct _synth {
     const char* model_name;
     int osc_count;
@@ -54,4 +58,8 @@ const char* filtertype_to_string(const filtertype_t* filt);
 
 const char* play_synth(synth_t* synth);
 
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
 #endif //SYNTH_SHED_H