EFL(1) EFL(1)
NAME
efl - extended Fortran language preprocessor
SYNOPSIS
efl [ option ... ] [ filename ... ]
DESCRIPTION
Efl compiles a program written in the EFL language into
clean Fortran. Efl provides the same control flow con-
structs 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 conve-
nient 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 state-
ment 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 For-
tran 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).
EFL(1) EFL(1)
S. I. Feldman, The Programming Language EFL, Bell Labs Com-
puting Science Technical Report #78.