To be honest, I'm totally lost in what you are saying up to "The best way I know to express the loop-and-a-half is:" ... from there on, I'm with you 100%. and you're right, this...

while (1) {
     S;
     last if (B);
     T;
}
[download]

...is a perfectly valid way of expressing the construct in Perl(5). But I'd like something:

• That doesn't require an explict "last" or "goto" inthe condition test
• that has less neccessary syntactic cruft (ie: the "(1)" on the while, and the "if" in the condition test
• forces S and T to be seperate scopes -- admitadly, this is just my own personal view on what *seems right* ... other people may not feel hat adds any value

hence my desire to have...

do {
     S;
} while (!B) {
     T;
}
[download]

...in perl5, which when S or T are No-Ops, breaks down to either...

do {
     S;
} while (!B);
# OR
while (!B) {
     T;
}
[download]

but the meaning of "do" changes in P6, hence...

loop {
     S;
} while (!B) {
     T;
}
[download]

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.