[Info-vax] Quoting question

[Stephen Hoffman]

On 2015-01-22 06:45:23 +0000, Bart Zorn said:

> On Wednesday, January 21, 2015 at 5:32:23 PM UTC+1, JF Mezei wrote:
>> Say I have:
>> 
>> $chocolate = "good"
>> $cherry = "red"
>> $flavour = "chocolate"
>> 
>> is there a way to have
>> 
>> $write sys$output "''flavour' is ?????????"
>> 
>> come out  as "chocolate is good"  ?
>> 
>> or would I have to do a substitution to a temporary variable first and 
>> use that temp variable in the write sys$output command ?
> 
> What is wrong with:
> 
> $ write sys$output flavour, " is ", chocolate
> 
> No quoting or substitution necessary.

Or going completely old school...

$ chocolate = "good"
$ flavour = "chocolate"
$ write sys$output f$fao("!AS is !AS",flavour,chocolate)

That's verified with:
$ show process/parse
....
Parse Style: Traditional

But as has been rather famously discussed over in Linux-land, using and 
assuming case blindness for comparisons — whether it's within the file 
system, or here at the DCL prompt — can lead to some nasty corner 
cases.   Case sensitivity is much simpler in terms of the 
implementation, even if various humans would prefer to avoid that.   
Nasty?  With UTF-8, case conversions aren't uniformaly reversible; 
converting a string to uppercase and then back to lowercase won't[1] 
reliably get you back the same character string you started with, 
either.   The mappings aren't one-to-one.   You'll usually end up 
having to drag around the original and the mapped string.

########
[1] See the Unicode documentation for the default case algorithms 
(section 3.13 in version 6.2 of the standard, page 115), and review the 
associated documents such as the SpecialCasing-7.0.0.txt Unicode 
character database document.

-- 
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