I have been reading kyle's Context tutorial.
Now I just wonder - how much of context is compile-time, how much run-time? Has that been discussed yet?
I ask because
perl -le 'my $f = 1; ($f > 0 ? @a : $a ) = ("a", "b", "c")'
Assignment to both a list and a scalar at -e line 1, at EOF
Execution of -e aborted due to compilation errors.
could be resolved at run-time, which isn't, because it barfs at compile-time. This works, however:
perl -le 'my $f = -1; ($f > 0 ? @a : @b ) = ("a", "b", "c"); print "a:
+ @a\nb: @b"'
b: a b c
perl -le 'my $f = 1; ($f > 0 ? @a : @b ) = ("a", "b", "c"); print "a:
a: a b c
update: diagnostics tells me that
Execution of -e aborted due to compilation errors (#1)
(F) If you assign to a conditional operator, the 2nd and 3rd arguments
must either both be scalars or both be lists. Otherwise Perl won't
know which context to supply to the right side.
which looks like establishing the context for the RHS is a compile-time thing. Is there such a thing as runtime context resolving, at all?
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
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! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||