text: #ifndef YIELD_PT
  #define YIELD_PT
  #include <MEPT.h>
  #include <aterm2.h>
  
  char *PT_yieldTree(PT_Tree tree);
  char *PT_yieldTreeToString(PT_Tree tree, ATbool yieldAllAmbiguities);
  char *PT_yieldArgsToString(PT_Args args, ATbool yieldAllAmbiguities);
  char *PT_yieldParseTreeToString(PT_ParseTree pt, ATbool yieldAllAmbiguities);
  char *PT_yieldAnyToString(ATerm t, ATbool yieldAllAmbiguities);
  
  void PT_yieldTreeToFile(PT_Tree tree, FILE *f, ATbool yieldAllAmbiguities);
  void PT_yieldArgsToFile(PT_Args args, FILE *f, ATbool yieldAllAmbiguities);
  void PT_yieldParseTreeToFile(PT_ParseTree pt, FILE *f, ATbool yieldAllAmbiguities);
  void PT_yieldAnyToFile(ATerm t, FILE *f, ATbool yieldAllAmbiguities);
  
  #endif
  