Add getSigNature API.

Author: sletz

architecture/faust/dsp/libfaust-signal.h

@@ -192,6 +192,15 @@ LIBFAUST_API Interval getSigInterval(Signal s);
  */
 LIBFAUST_API void setSigInterval(Signal s, Interval& inter);
 
+/**
+ * Get the signal type.
+ *
+ * @param s - the signal
+ *
+ * @return the signal type
+ */
+LIBFAUST_API SType getSigNature(Signal s);
+
 /**
  * Check if a signal is nil.
  *

compiler/box_signal_api.cpp

@@ -170,6 +170,12 @@ LIBFAUST_API Tree sigFVar(SType type, const string& name, const string& file)
     return sigFVar(tree(type), tree(name), tree(file));
 }
 
+LIBFAUST_API SType getSigNature(Tree s)
+{
+    ::Type type = getCertifiedSigType(s);
+    return SType(type->nature());
+}
+
 // User Interface
 
 LIBFAUST_API Tree sigButton(const string& label)