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

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                      4: PDAE(2)               Icon Program Library                PDAE(2)
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                      8: NNNNAAAAMMMMEEEE
                      9:      pdae - programmer-defined argument evaluation
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                     11: DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
                     12:      These procedures are taken mainly from TR 82-16, which
                     13:      describes how co-expressions can be used to model the
                     14:      built-in argument evaluation regime of Icon and also provide
                     15:      new ones. Some procedures have been corrected or improved.
                     16: 
                     17: SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
                     18:      AAAAllllllllppppaaaarrrr{{{{eeee1111,,,,eeee2222,,,, ...}}}}  parallel evaluation with last result used for short sequences
                     19:      CCCCaaaallllllll((((aaaa))))             utility procedure to call functions
                     20:      EEEExxxxttttrrrraaaacccctttt{{{{eeee1111,,,,eeee2222,,,, ...}}}} extract results of even-numbered arguments according to
                     21:                             odd-numbered values
                     22:      LLLLiiiiffffoooo{{{{eeee1111,,,,eeee2222,,,, ...}}}}    models standard Icon `lifo' evaluation
                     23:      PPPPaaaarrrraaaalllllllleeeellll{{{{eeee1111,,,,eeee2222,,,, ...}}}}parallel evaluation terminating on shortest sequence
                     24:      RRRReeeevvvveeeerrrrsssseeee{{{{eeee1111,,,,eeee2222,,,, ...}}}} left-to-right reversal of lifo evaluation
                     25:      RRRRoooottttaaaatttteeee{{{{eeee1111,,,,eeee2222,,,, ...}}}}  parallel evaluation with shorter sequences re-evaluated
                     26:      SSSSiiiimmmmpppplllleeee{{{{eeee1111,,,,eeee2222,,,, ...}}}}  simple evaluation with only success or failure
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                     28: RRRREEEEQQQQUUUUIIIIRRRREEEEMMMMEEEENNNNTTTTSSSS
                     29:      _P_d_a_e requires the experimental extensions in Version 5.9 of
                     30:      Icon.
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                     32: BBBBUUUUGGGGSSSS AAAANNNNDDDD LLLLIIIIMMMMIIIITTTTAAAATTTTIIIIOOOONNNNSSSS
                     33:      Because of the handling of the scope of local identifiers in
                     34:      co-expressions, expressions in programmer-defined argument
                     35:      evaluation regimes cannot communicate through local identif-
                     36:      iers. The results produced by programmer-defined argument
                     37:      evaluation regimes are always dereferenced. Some construc-
                     38:      tions, such as bbbbrrrreeeeaaaakkkk and rrrreeeettttuuuurrrrnnnn, cannot be used in arguments
                     39:      to programmer-defined argument evaluation regimes. See TR
                     40:      82-8 for details of these problems.
                     41: 
                     42:      At most 10 arguments can be used in the invocation of a
                     43:      programmer-defined argument evaluation regime. This limit
                     44:      can be increased by modifying CCCCaaaallllllll.
                     45: 
                     46: SSSSEEEEEEEE AAAALLLLSSSSOOOO
                     47:      pdco(2)
                     48: 
                     49:      Novak, Michael and Ralph E. Griswold. _P_r_o_g_r_a_m_m_e_r-_D_e_f_i_n_e_d
                     50:      _A_r_g_u_m_e_n_t _E_v_a_l_u_a_t_i_o_n _R_e_g_i_m_e_s, TR 82-16, Department of Com-
                     51:      puter Science, The University of Arizona, 1982.
                     52: 
                     53:      Griswold, Ralph E., Robert K. McConeghy, and William H.
                     54:      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
                     55:      _L_a_n_g_u_a_g_e, TR 84-10a, Department of Computer Science, The
                     56:      University of Arizona, 1984.
                     57: 
                     58: AAAAUUUUTTTTHHHHOOOORRRRSSSS
                     59:      Ralph E. Griswold and Michael Novak
                     60: 
                     61: 
                     62: 
                     63: Version 5.9    The University of Arizona - 8/16/84              1
                     64: 
                     65: 
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