source: doc/papers/concurrency/examples/Fmt.sim@ 44198fb9

BEGIN
        CLASS FmtLines;
                HIDDEN ch, main;                                        ! private members;
        BEGIN
                CHARACTER ch;                                           ! communication;

                PROCEDURE main;                                         ! mimic uC++ coroutine main;
                BEGIN
                        INTEGER g, b;

                        WHILE TRUE DO BEGIN                             ! for as many characters;
                                FOR g := 1 STEP 1 UNTIL 5 DO BEGIN              ! groups of 5;
                                        FOR b := 1 STEP 1 UNTIL 4 DO BEGIN      ! blocks of 4;
                                                OutChar( ch );
                                                Detach;                         ! suspend();
                                        END;
                                        OutText( "  " );
                                END;
                                OutImage;                                       ! start newline;
                        END;
                END;

                PROCEDURE prt( chp );
                        CHARACTER chp;
                BEGIN
                        ch := chp;                                              ! communication;
                        Call( THIS FmtLines );                  ! resume();
                END;
                ! FmtLines constructor code;
                Detach;                                                         ! return to declaration;
                main;                                                           ! call main as last line of constructor;
        END FmtLines;
        ! program main equivalent;
        REF(FmtLines) fmt;                                              ! objects are references;
        INTEGER i;

        fmt :- NEW FmtLines;
        FOR i := Rank( ' ' ) STEP 1 UNTIL Rank( 'z' ) DO BEGIN
                fmt.prt( Char( i ) );
        END
END;

! Local Variables: ;
! tab-width: 4 ;
! compile-command: "cim Fmt.sim" ;
! End: ;