Start work on interpreter

src/types.h

@@ -82,7 +82,7 @@ GroundValue createIntGroundValue(int64_t in);
 
 // Creates a GroundValue containing (in), with type DOUBLE.
 GroundValue createDoubleGroundValue(double in);
-;
+
 // Creates a GroundValue containing (in), with type STRING.
 GroundValue createStringGroundValue(const char* in);
 
@@ -95,6 +95,9 @@ GroundValue createBoolGroundValue(bool in);
 // If (gv) contains any data stored on the heap, frees it.
 void freeGroundValue(GroundValue* gv);
 
+// Prints out a GroundValue.
+void printGroundValue(GroundValue* gv);
+
 // Initializes a GroundArg with type VALUE
 GroundArg createValueGroundArg(GroundValue value);
 
@@ -104,6 +107,9 @@ GroundArg createRefGroundArg(GroundArgType type, const char* refname);
 // Frees all data stored on the heap in a GroundArg.
 void freeGroundArg(GroundArg* ga);
 
+// Prints out a GroundArg.
+void printGroundArg(GroundArg* ga);
+
 // Initializes a GroundInstruction, with inst type (type).
 GroundInstruction createGroundInstruction(GroundInstType type);
 
@@ -113,4 +119,7 @@ void freeGroundInstruction(GroundInstruction* gi);
 // Adds arg (arg) to the GroundInstruction (gi).
 void addArgToInstruction(GroundInstruction* gi, GroundArg arg);
 
+// Prints out a GroundInstruction.
+void printGroundInstruction(GroundInstruction* gi);
+
 #endif