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efl(1) [bsd man page]

EFL(1)							      General Commands Manual							    EFL(1)

NAME
efl - Extended Fortran Language SYNOPSIS
efl [ option ... ] [ filename ... ] DESCRIPTION
Efl compiles a program written in the EFL language into clean Fortran. Efl provides the same control flow constructs as does ratfor(1), which are essentially identical to those in C: statement grouping with braces; decision-making with if, if-else, and switch-case; while, for, Fortran do, repeat, and repeat...until loops; multi-level break and next. In addition, EFL has C-like data structures, and more uniform and convenient input/output syntax, generic functions. EFL also provides some syntactic sugar to make programs easier to read and write: free form input: multiple statements/line; automatic continuation statement label names (not just numbers), comments: # this is a comment translation of relationals: >, >=, etc., become .GT., .GE., etc. return (expression) returns expression to caller from function define: define name replacement include: include filename The Efl command option -w suppresses warning messages. The option -C causes comments to be copied through to the Fortran output (default); -# prevents comments from being copied through. If a command argument contains an embedded equal sign, that argument is treated as if it had appeared in an option statement at the beginning of the program. Efl is best used with f77(1). SEE ALSO
f77(1), ratfor(1). S. I. Feldman, The Programming Language EFL, Bell Labs Computing Science Technical Report #78. 7th Edition April 29, 1985 EFL(1)

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STRUCT(1)						      General Commands Manual							 STRUCT(1)

NAME
struct - structure Fortran programs SYNOPSIS
struct [ option ] ... file DESCRIPTION
Struct translates the Fortran program specified by file (standard input default) into a Ratfor program. Wherever possible, Ratfor control constructs replace the original Fortran. Statement numbers appear only where still necessary. Cosmetic changes are made, including chang- ing Hollerith strings into quoted strings and relational operators into symbols (.e.g. `.GT.' into `>'). The output is appropriately indented. The following options may occur in any order. -s Input is accepted in standard format, i.e. comments are specified by a c, C, or * in column 1, and continuation lines are specified by a nonzero, nonblank character in column 6. Normally, a statement whose first nonblank character is not alphanumeric is treated as a continuation. -i Do not turn computed goto statements into switches. (Ratfor does not turn switches back into computed goto statements.) -a Turn sequences of else ifs into a non-Ratfor switch of the form switch { case pred1: code case pred2: code case pred3: code default: code } The case predicates are tested in order; the code appropriate to only one case is executed. This generalized form of switch state- ment does not occur in Ratfor. -b Generate goto's instead of multilevel break statements. -n Generate goto's instead of multilevel next statements. -en If n is 0 (default), place code within a loop only if it can lead to an iteration of the loop. If n is nonzero, admit code segments with fewer than n statements to a loop if otherwise the loop would have exits to several places including the segment, and the seg- ment can be reached only from the loop. FILES
/tmp/struct* /usr/lib/struct/* SEE ALSO
f77(1) BUGS
Struct knows Fortran 66 syntax, but not full Fortran 77 (alternate returns, IF...THEN...ELSE, etc.) If an input Fortran program contains identifiers which are reserved words in Ratfor, the structured version of the program will not be a valid Ratfor program. Extended range DO's generate cryptic errors. Columns 73-80 are not special even when -s is in effect. Will not generate Ratfor FOR statements. STRUCT(1)
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