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drop-double-input.txt
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drop-double-input.txt
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Article: 79523 of comp.lang.forth
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Subject: RFD: Drop double numbers as input format
From: Matthias Trute <matthias.trute@gmail.com>
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A radical one. I admit.
Problem
=======
Double numbers are specified as integer numbers with
values beyond cell size (e.g. 65535 on a 16-bit system).
They shall be entered with a trailing dot. Common practice
is that the dot can be at any place within the number
string which conflicts with floating point number formats.
Solution
========
To avoid the syntax confusion and since double numbers
have a fixed stack order, there is no immediate need
to directly enter double numbers at all. The number 1.
can be written as the sequence 1 0 with single cell numbers
without portabilities issues.
With the wide spread usage of 32 and 64-bit systems, the
need for double cell numbers as input format is expected
to be less important.
Proposal
========
Remove the trailing dot specification from the standard
and remove the double number as an input format for
integer numbers. All other occurrences of double numbers
are left unchanged.
Experience
==========
None
Typical Usage
=============
Existing double cell input formats are to be split into
two literals. Existing sequences such as "1." are to be
replaced with " 1 0 ".