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Annotation of 43BSD/contrib/icon/man/man2/pdco.2, revision 1.1

1.1     ! root        1: .so tmac.ilib
        !             2: .TH PDCO 2 "The University of Arizona \- 8/16/84"
        !             3: .SH NAME
        !             4: pdco \- programmer-defined control operations
        !             5: .SH DESCRIPTION
        !             6: These procedures are taken mainly from TR 82-8, which describes
        !             7: how co-expressions can be used to model the built-in control
        !             8: structures of Icon and also provide new ones. Some procedures have
        !             9: been corrected or improved and there are additions.
        !            10: .SH SYNOPSIS
        !            11: .nf
        !            12: .ta 2.0i
        !            13: \*MAlt\^{e1,\*be2}\fR  models \*Me1 | e2\fR
        !            14: \*MColseq\^{e1,\*be2, \*(El}\fR        produces results of \*Me1\fR, \*Me2\fR, \*(El alternately
        !            15: \*MComseq\^{e1,\*be2}\fR       compares result sequences of \*Me1\fR and \*Me2\fR
        !            16: \*MCond\^{e1,\*be2, \*(El}\fR  generalized Lisp conditional
        !            17: \*MEvery\^{e1,\*be2}\fR        models \*Mevery e1 do e2\fR
        !            18: \*MGalt\^{e1,\*be2, \*(El}\fR  generalized alternation: \*Me1 | e2 | \*(El\fR
        !            19: \*MLcond\^{e1,\*be2, \*(El}\fR Lisp conditional
        !            20: \*MLimit\^{e1,\*be2}\fR        models \*Me1 \e e2\fR
        !            21: \*MRanseq\^{e1,\*be2, \*(El}\fR        produces results of \*Me1\fR, \*Me2\fR, \*(El at random
        !            22: \*MRepalt\^{e}\fR      models \*M|e\fR
        !            23: \*MResume\^{e1,\*be2,\*be3}\fR models \*Mevery e1 \e e2 do e3\fR
        !            24: \*MSelect\^{e1,\*be2}\fR       produces results from \*Me1\fR by position according to \*Me2\fR
        !            25: .SH BUGS AND DEFICIENCIES
        !            26: Because of the handling of the scope of local identifiers in co-expressions,
        !            27: expressions in programmer-defined control operations cannot communicate
        !            28: through local identifiers. The results produced by programmer-defined
        !            29: control operations are always dereferenced. Some constructions, such
        !            30: as \*Mbreak\fR and \*Mreturn\fR, cannot be used in arguments to programmer-defined
        !            31: control operations. See TR 82-8 for details of these problems.
        !            32: .SH REQUIREMENTS
        !            33: \fIPdco\fR requires the experimental extensions in Version 5.9 of Icon.
        !            34: .SH SEE ALSO
        !            35: pdae(2)
        !            36: .PP
        !            37: .Pd
        !            38: .PP
        !            39: .Ex
        !            40: .SH AUTHORS
        !            41: Ralph E. Griswold and Michael Novak

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