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Annotation of 43BSDTahoe/man/man1/struct.1, revision 1.1.1.1

1.1       root        1: .\"    @(#)struct.1    6.1 (Berkeley) 4/29/85
                      2: .\"
                      3: .TH STRUCT 1 "April 29, 1985"
                      4: .AT 3
                      5: .SH NAME
                      6: struct \- structure Fortran programs
                      7: .SH SYNOPSIS
                      8: .B struct
                      9: [ option ] ...
                     10: file
                     11: .SH DESCRIPTION
                     12: .LP
                     13: .I Struct
                     14: translates the Fortran program specified by
                     15: .I file
                     16: (standard input default)
                     17: into a Ratfor program.
                     18: Wherever possible, Ratfor control constructs
                     19: replace the original Fortran.
                     20: Statement numbers appear only where still necessary.
                     21: Cosmetic changes are made, including changing Hollerith strings
                     22: into quoted strings
                     23: and relational operators into symbols (.e.g. ".GT." into ">").
                     24: The output is appropriately indented.
                     25: .PP
                     26: The following options may occur in any order.
                     27: .TP
                     28: .B  \-s
                     29: Input is accepted in standard format, i.e.
                     30: comments are specified by a c, C, or * in column 1, and continuation lines
                     31: are specified by a nonzero, nonblank character in column 6.
                     32: Normally input is in the form accepted by 
                     33: .IR f77 (1)
                     34: .TP
                     35: .B  \-i
                     36: Do not turn computed goto statements into
                     37: switches.
                     38: (Ratfor does not turn switches back
                     39: into computed goto statements.)
                     40: .TP
                     41: .B  \-a
                     42: Turn sequences of else ifs into a
                     43: non-Ratfor switch of the form
                     44: .IP
                     45: .nf
                     46: .ta 5 7
                     47: switch
                     48:        {       case pred1: code
                     49:                case pred2: code
                     50:                case pred3: code
                     51:                default: code
                     52:        }
                     53: .fi
                     54: .DT
                     55: .IP
                     56: The case predicates are tested in order;
                     57: the code appropriate to only one case is executed.
                     58: This generalized form of switch statement does not
                     59: occur in Ratfor.
                     60: .TP
                     61: .B  \-b
                     62: Generate goto's instead of multilevel break statements.
                     63: .TP
                     64: .B  \-n
                     65: Generate goto's instead of multilevel next statements.
                     66: .TP
                     67: .BI \-t n
                     68: Make
                     69: the nonzero integer
                     70: .I n
                     71: the lowest valued label in the output program
                     72: (default 10).
                     73: .TP
                     74: .BI \-c n
                     75: Increment successive labels
                     76: in the output program
                     77: by the nonzero integer
                     78: .I n
                     79: (default 1).
                     80: .TP
                     81: .BI \-e n
                     82: If 
                     83: .I n
                     84: is 0 (default),
                     85: place code within a loop only if it can
                     86: lead to an iteration of the loop.
                     87: If
                     88: .I n
                     89: is nonzero,
                     90: admit a small code segments to a loop
                     91: if otherwise the loop would have exits to several places including the segment,
                     92: and the segment can be reached only from the loop.
                     93: `Small' is close to, but not equal to, the
                     94: number of statements in the code segment.
                     95: Values of n under 10 are suggested.
                     96: .SH FILES
                     97: /tmp/struct*
                     98: .br
                     99: /usr/lib/struct/*
                    100: .SH SEE ALSO
                    101: f77(1)
                    102: .SH BUGS
                    103: Struct knows Fortran 66 syntax, but not full Fortran 77.
                    104: .br
                    105: If an input Fortran program contains identifiers which
                    106: are reserved words in Ratfor, the structured
                    107: version of the program
                    108: will not be a valid Ratfor program.
                    109: .br
                    110: The labels generated cannot go above 32767.
                    111: .br
                    112: If you get a goto without a target, try
                    113: .B \-e .

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