X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2Fstrict.pm;h=8afb9a37921c13127577a5cd8e129517b58bc46d;hb=847a5fae45dac396d0f9e1bb61d5b4ff9d94cdcd;hp=2b1d964e653c583f3ae073c8baa42c3f9864fd0e;hpb=a5871d1a83cd3d5c7292135cbb30a336a8552ab0;p=p5sagit%2Fp5-mst-13.2.git diff --git a/lib/strict.pm b/lib/strict.pm index 2b1d964..8afb9a3 100644 --- a/lib/strict.pm +++ b/lib/strict.pm @@ -34,12 +34,22 @@ use symbolic references (see L). print $$ref; # ok $ref = "foo"; print $$ref; # runtime error; normally ok + $file = "STDOUT"; + print $file "Hi!"; # error; note: no comma after $file + +There is one exception to this rule: + + $bar = \&{'foo'}; + &$bar; + +is allowed so that C would not break under stricture. + =item C This generates a compile-time error if you access a variable that wasn't -declared via C, -localized via C or wasn't fully qualified. Because this is to avoid +declared via "our" or C, +localized via C, or wasn't fully qualified. Because this is to avoid variable suicide problems and subtle dynamic scoping issues, a merely local() variable isn't good enough. See L and L. @@ -50,12 +60,15 @@ L. local $foo = 9; # blows up package Cinna; - use vars qw/ $bar /; # Declares $bar in current package + our $bar; # Declares $bar in current package $bar = 'HgS'; # ok, global declared via pragma The local() generated a compile-time error because you just touched a global name without fully qualifying it. +Because of their special use by sort(), the variables $a and $b are +exempted from this check. + =item C This disables the poetry optimization, generating a compile-time error if @@ -72,7 +85,7 @@ appears in curly braces or on the left hand side of the "=E" symbol. =back -See L. +See L. =cut