Re: Keywords and Reserved Words

"Robin Vowels" <robin51@dodo.com.au>
Thu, 10 Mar 2022 09:55:46 +1100

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From: "Robin Vowels" <robin51@dodo.com.au>
Newsgroups: comp.compilers
Date: Thu, 10 Mar 2022 09:55:46 +1100
Organization: Compilers Central
References: 22-03-004 22-03-009 22-03-015 22-03-016 22-03-017
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Keywords: Fortran, parse, comment
Posted-Date: 09 Mar 2022 20:53:53 EST

> [If anyone wants to know how to find the tokens in old space-insensitive Fortran
> I can tell you, but it's as ugly as you might imagine. -John]


No it's not.
See A. H. J. Sale, "The Classification of FORTRAN Statements", Computer Journal,
Vol. 14 No. 1, 1971.
[Having written production Fortran compilers, I can assure you that to
do it right is quite ugly. I looked at the article and he missed some things,
and he made some unrealistic assumptions that a compiler would accept nothing
beyond what was in the Basic Fortran standard. -John]

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