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  1. lex_by_file( FileName ) :-
  2. 	get_input_from_file( FileName, TokenList ),
  3. 	lex( TokenList, OutputList ),
  4. 	%write_output( OutputList ), !.
  5. 	maplist(writeln,OutputList),!.
  6.  
  7. %% atom_number(atom, number)
  8. lex([],[]).
  9. lex(['int' | T], ['TYPE: int' | R]) :-  lex(T, R).
  10. lex(['bool' | T], ['TYPE: bool'] | R) :- lex(T, R).
  11. lex([',' | T], ['COMMA: ,'] | R) :- lex(T, R).
  12. lex([X | T], [X | R]) :- lex(T, R).
  13.  
Success #stdin #stdout #stderr 0.02s 6924KB
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stdin
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if x=5+3*2
stdout
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Standard output is empty
stderr
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ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/oXbiiJ
language:
Prolog (swi 7.6.4)
created:
1 day ago
visibility:
public

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