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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 6864KB
comments (?)
stdin
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%{
#include <stdio.h>
%}

%%
[A-Z]   { printf("Capital letter: %s\n", yytext); }
[a-z]   { printf("Small letter: %s\n", yytext); }
.       { printf("Not a letter: %s\n", yytext); }
%%

int main() {
    yylex();
    return 0;
}

int yywrap() {
    return 1;
}
stdout
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Standard output is empty
stderr
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ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? ERROR: Unknown option (h for help)
   Exception: (3) program ? ERROR: Unknown option (h for help)
   Exception: (3) program ? ERROR: Unknown option (h for help)
   Exception: (3) program ? ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? ERROR: Unknown option (h for help)
   Exception: (3) program ? ERROR: Unknown option (h for help)
   Exception: (3) program ? ERROR: Unknown option (h for help)
   Exception: (3) program ? ERROR: No previous search
   Exception: (3) program ? ERROR: Unknown option (h for help)
   Exception: (3) program ? ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? ERROR: Can't ignore goal at this port
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? ERROR: Unknown option (h for help)
   Exception: (3) program ?    Call: (3) program ? ERROR: Unknown option (h for help)
   Call: (3) program ? ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? ERROR: Can't ignore goal at this port
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ?    Call: (3) program ? EOF: exit
https://ideone.com/II7blK
language:
Prolog (swi 7.6.4)
created:
6 hours ago
visibility:
public

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