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-k
: Don't recognize lower-case forms of keywordsBy definition, in FORTRAN and RATFOR, a keyword is one of the
parameters such as IOSTAT
used in the parameter list of an I/O
statement. For example,
open(21, FILE=file_name, STATUS='old', IOSTAT=io_flag)
Such keywords are typeset in typewriter type
to better highlight them.
In FORTRAN, these keywords are case-insensitive. However,
note that certain of the lower-case forms--in particular, end
,
read
, and write
--have other special meanings, and one can
in principle use any of these keywords as ordinary variables in other parts of
the code; however, FWEB identifiers can have just one meaning
throughout the code. By default, the lower-case forms are also
recognized as keywords (except for the three special identifiers just
mentioned), so one shouldn't use those as regular variables. To cause
only the upper-case forms to be recognized, use the -k
option.