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Annotation of 43BSD/contrib/icon/man/cat2/pdco.2, revision 1.1.1.1

1.1       root        1: 
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                      3: 
                      4: PDCO(2)               Icon Program Library                PDCO(2)
                      5: 
                      6: 
                      7: 
                      8: NNNNAAAAMMMMEEEE
                      9:      pdco - programmer-defined control operations
                     10: 
                     11: DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
                     12:      These procedures are taken mainly from TR 82-8, which
                     13:      describes how co-expressions can be used to model the
                     14:      built-in control structures of Icon and also provide new
                     15:      ones. Some procedures have been corrected or improved and
                     16:      there are additions.
                     17: 
                     18: SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
                     19:      AAAAlllltttt{{{{eeee1111,,,,eeee2222}}}}          models eeee1111 |||| eeee2222
                     20:      CCCCoooollllsssseeeeqqqq{{{{eeee1111,,,,eeee2222,,,, ...}}}}  produces results of eeee1111, eeee2222, ... alternately
                     21:      CCCCoooommmmsssseeeeqqqq{{{{eeee1111,,,,eeee2222}}}}       compares result sequences of eeee1111 and eeee2222
                     22:      CCCCoooonnnndddd{{{{eeee1111,,,,eeee2222,,,, ...}}}}    generalized Lisp conditional
                     23:      EEEEvvvveeeerrrryyyy{{{{eeee1111,,,,eeee2222}}}}        models eeeevvvveeeerrrryyyy eeee1111 ddddoooo eeee2222
                     24:      GGGGaaaalllltttt{{{{eeee1111,,,,eeee2222,,,, ...}}}}    generalized alternation: eeee1111 |||| eeee2222 |||| ...
                     25:      LLLLccccoooonnnndddd{{{{eeee1111,,,,eeee2222,,,, ...}}}}   Lisp conditional
                     26:      LLLLiiiimmmmiiiitttt{{{{eeee1111,,,,eeee2222}}}}        models eeee1111 \\\\ eeee2222
                     27:      RRRRaaaannnnsssseeeeqqqq{{{{eeee1111,,,,eeee2222,,,, ...}}}}  produces results of eeee1111, eeee2222, ... at random
                     28:      RRRReeeeppppaaaalllltttt{{{{eeee}}}}           models ||||eeee
                     29:      RRRReeeessssuuuummmmeeee{{{{eeee1111,,,,eeee2222,,,,eeee3333}}}}    models eeeevvvveeeerrrryyyy eeee1111 \\\\ eeee2222 ddddoooo eeee3333
                     30:      SSSSeeeelllleeeecccctttt{{{{eeee1111,,,,eeee2222}}}}       produces results from eeee1111 by position according to eeee2222
                     31: 
                     32: BBBBUUUUGGGGSSSS AAAANNNNDDDD DDDDEEEEFFFFIIIICCCCIIIIEEEENNNNCCCCIIIIEEEESSSS
                     33:      Because of the handling of the scope of local identifiers in
                     34:      co-expressions, expressions in programmer-defined control
                     35:      operations cannot communicate through local identifiers. The
                     36:      results produced by programmer-defined control operations
                     37:      are always dereferenced. Some constructions, such as bbbbrrrreeeeaaaakkkk
                     38:      and rrrreeeettttuuuurrrrnnnn, cannot be used in arguments to programmer-
                     39:      defined control operations. See TR 82-8 for details of these
                     40:      problems.
                     41: 
                     42: RRRREEEEQQQQUUUUIIIIRRRREEEEMMMMEEEENNNNTTTTSSSS
                     43:      _P_d_c_o requires the experimental extensions in Version 5.9 of
                     44:      Icon.
                     45: 
                     46: SSSSEEEEEEEE AAAALLLLSSSSOOOO
                     47:      pdae(2)
                     48: 
                     49:      Griswold, Ralph E., Robert K. McConeghy, and William H.
                     50:      Mitchell.  _E_x_t_e_n_s_i_o_n_s _t_o _V_e_r_s_i_o_n _5 _o_f _t_h_e _I_c_o_n _P_r_o_g_r_a_m_m_i_n_g
                     51:      _L_a_n_g_u_a_g_e, TR 84-10a, Department of Computer Science, The
                     52:      University of Arizona, 1984.
                     53: 
                     54: AAAAUUUUTTTTHHHHOOOORRRRSSSS
                     55:      Ralph E. Griswold and Michael Novak
                     56: 
                     57: 
                     58: 
                     59: 
                     60: 
                     61: 
                     62: 
                     63: Version 5.9    The University of Arizona - 8/16/84              1
                     64: 
                     65: 
                     66: 

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