On 23/04/2024 12:01 am, Seymour J Metz wrote:
delete foo
rather than
'DELETE' foo
is a simple example. In practise I often need multiple upper case constants in
a single expression.
In this example, delete *looks like* an instruction rather than a
variable - the fact that it is a variable is likely to surprise people.
It seems to be setting up for a problem like:
if <condition> then
delete = 'yes'
...
if delete = yes then
delete foo
If I understand your example correctly,
delete foo
concatenates the values of the variable delete (which is 'DELETE' if
hasn't been initialized) and foo, inserting an implied blank between
them, then passes the result to an environment set up previously with an
ADDRESS statement?
This is what I want to avoid using SIGNAL ON NOVALUE.
To me, it is much clearer to be explicit, including the concatenation, e.g.
"DELETE " || foo
seems much clearer about exactly what is happening/expected, which are
variables and which are (expected to be) constant etc.
--
Andrew Rowley
Black Hill Software
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