opcode sequence.
Hi,
Here's a test on perl-5.8.6 run on z/OS :
$a = '0178';
$b = '00FF';
$a1 = pack(U0U*, hex $a);
$b1 = pack(U0U*, map { hex } split , $b);
if (:$b1: =~ /:[$a1]:/i)
print ok;
The test runs through the opcodes OP_REGCOMP, OP_MATCH and then gets into the
opcode OP_COND_EXPR.
Now, if I change $a = '212B' and $b = '00E5'
the test runs through the opcodes OP_REGCOMP, OP_MATCH and then gets into
OP_AND (and not OP_COND_EXPR).
why is this so ?
Thanks,
Rajarshi.
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Re: opcode sequence.
On Thu, Aug 18, 2005 at 11:19:16PM -0700, rajarshi das wrote:
Hi,
Here's a test on perl-5.8.6 run on z/OS :
$a = '0178';
$b = '00FF';
$a1 = pack(U0U*, hex $a);
$b1 = pack(U0U*, map { hex } split , $b);
if (:$b1: =~ /:[$a1]:/i)
print ok;
The test runs through the opcodes OP_REGCOMP, OP_MATCH and then gets
into the opcode OP_COND_EXPR.
Well, the test above should in fact give a syntax error, since that's not
a valid if syntax.
--
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sixteen-oh-ten. Sold to Germany a year later for a pfennig and the promise
of a kiss. Destroyed in eighteen thirty-fourty two, and rebuilt a week
later by a man. This we know. Hello. But what of the people of Britain?
Who they? What do? And why? -- Little Britain
Re: opcode sequence.
Dave Mitchell [EMAIL PROTECTED] wrote:
On Thu, Aug 18, 2005 at 11:19:16PM -0700, rajarshi das wrote:
Hi,
Here's a test on perl-5.8.6 run on z/OS :
$a = '0178';
$b = '00FF';
$a1 = pack(U0U*, hex $a);
$b1 = pack(U0U*, map { hex } split , $b);
if (:$b1: =~ /:[$a1]:/i) {
print ok;
}
The test runs through the opcodes OP_REGCOMP, OP_MATCH and then gets
into the opcode OP_COND_EXPR.
Well, the test above should in fact give a syntax error, since that's not
a valid if syntax.
I have included the braces if that is what you meant.
Rajarshi.
--
Britain, Britain, Britain! Discovered by Sir Henry Britain in
sixteen-oh-ten. Sold to Germany a year later for a pfennig and the promise
of a kiss. Destroyed in eighteen thirty-fourty two, and rebuilt a week
later by a man. This we know. Hello. But what of the people of Britain?
Who they? What do? And why? -- Little Britain
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Start your day with Yahoo! - make it your home page
Re: opcode sequence.
On Fri, Aug 19, 2005 at 12:51:09AM -0700, rajarshi das wrote:
Dave Mitchell [EMAIL PROTECTED] wrote:
On Thu, Aug 18, 2005 at 11:19:16PM -0700, rajarshi das wrote:
Hi,
Here's a test on perl-5.8.6 run on z/OS :
$a = '0178';
$b = '00FF';
$a1 = pack(U0U*, hex $a);
$b1 = pack(U0U*, map { hex } split , $b);
if (:$b1: =~ /:[$a1]:/i) {
print ok;
}
The test runs through the opcodes OP_REGCOMP, OP_MATCH and then gets
into the opcode OP_COND_EXPR.
Well, the test above should in fact give a syntax error, since that's not
a valid if syntax.
I have included the braces if that is what you meant.
cond_expr would be there if there were an else clause.
Re: opcode sequence.
Yitzchak Scott-Thoennes [EMAIL PROTECTED] wrote:
On Fri, Aug 19, 2005 at 12:51:09AM -0700, rajarshi das wrote:
Dave Mitchell wrote:
On Thu, Aug 18, 2005 at 11:19:16PM -0700, rajarshi das wrote:
Hi,
Here's a test on perl-5.8.6 run on z/OS :
$a = '0178';
$b = '00FF';
$a1 = pack(U0U*, hex $a);
$b1 = pack(U0U*, map { hex } split , $b);
if (:$b1: =~ /:[$a1]:/i) {
print ok;
}
The test runs through the opcodes OP_REGCOMP, OP_MATCH and then gets
into the opcode OP_COND_EXPR.
Well, the test above should in fact give a syntax error, since that's not
a valid if syntax.
I have included the braces if that is what you meant.
cond_expr would be there if there were an else clause.
But the test doesnot contain an else clause. What I have indicated above is
exactly what I run.
Rajarshi.
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Re: opcode sequence.
On Fri, Aug 19, 2005 at 01:15:07AM -0700, rajarshi das wrote: cond_expr would be there if there were an else clause. But the test doesnot contain an else clause. What I have indicated above is exactly what I run. I have run it with both sets of values for $a and $b, and both times I see the next op executed *by the main body of code* to be OP_AND. Note however, that when the match is exdcuted, match itself calls into code in utf8_heavy.pl, so the next op executed after the OP_MATCH isn't the condiition on the next line. -- The Enterprise's efficient long-range scanners detect a temporal vortex distortion in good time, allowing it to be safely avoided via a minor course correction. -- Things That Never Happen in Star Trek #21
