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/* parser.c */
Term *parse(int, Biobuf *, int);
/* prettyprint.c */
Rune *prettyprint(Term *, int, int, int);
/* misc.c */
Term *copyterm(Term *, uvlong *);
Term *appendterm(Term *, Term *);
int termslength(Term *);
Term *mkatom(Rune *);
Term *mkvariable(Rune *);
Term *mkcompound(Rune *, int, Term *);
Term *mknumber(int, vlong, double);
Term *mkstring(Rune *);
Term *mklist(Term *);
/* eval.c */
int evalquery(Term *, Term *, Binding **);
int unify(Term *, Term *, Binding **);
void applybinding(Term *, Binding *);
/* repl.c */
void repl(Term *);
/* builtins.c */
Builtin findbuiltin(Term *);
/* flags.c */
void initflags(void);
Term *setflag(Rune *, Term *);
/* error.c */
Term *instantiationerror(void);
Term *typeerror(Rune *, Term *);
Term *domainerror(Rune *, Term *);
Term *existenceerror(Rune *, Term *);
Term *permissionerror(Rune *, Rune *, Term *);
Term *representationerror(Rune *);
Term *evaluationerror(Rune *);
Term *resourceerror(Rune *);
Term *syntaxerror(Rune *);
/* streams.c */
void initstreams(void);
int openstream(Rune *, Rune *, Term *, Term **);
void closestream(Term *);
Term *currentinputstream(void);
Term *currentoutputstream(void);
void setcurrentinputstream(Term *);
void setcurrentoutputstream(Term *);
int isopenstream(Term *);
int isinputstream(Term *);
int isoutputstream(Term *);
int istextstream(Term *);
int isbinarystream(Term *);
int readterm(Term *, Term *, Term **);
void writeterm(Term *, Term *, Term *);
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