[sqr-users] Re: Replacing single quote with two single quotes

[Nathan Stratton Treadway <nathanst@ontko.com>]

On Wed, Feb 11, 2004 at 07:30:29PM +1100, Steve Cavill wrote:
> Looks like there's a bug in v6:
> 
> The problem is the surrounding quotes, combined with replace.
> 
> This works in 6.2.1:
> let $namefirstQ =   replace($namefirst,$Quote,$twoquotes)
>  let $namefirstQ= ''''|| $namefirstQ || ''''
> 
> but this crashes:
> let $namefirstQ =  '''' || replace($namefirst,$Quote,$twoquotes) || ''''

More generally, there seems to be a problem if the REPLACE operation is
used inside a more complex expression, and the "old" and "new" strings
aren't the same size.

So, these seem to work:
  let $test = 'Test ' || replace('ABC','A','1')
  let $test = replace('ABC','A','12')
but this will seg fault:
  let $test = 'Test ' || replace('ABC','A','12')
and this produces the wrong output  ("12BC1 1BCTest" instead of
"12BCTest"): 
  let $test = replace('ABC','A','12') || 'Test'


As far as I can tell, the workaround you found (putting the REPLACE in
its own LET statement) does work correctly in all situations.
 

> Both work fine in sqr 8.1

The release notes for v8.0 include this note: "13310 The SQR LET function
REPLACE() now works properly in all cases."

                                                        Nathan
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