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Diffstat (limited to 'pod/perltrap.pod')
| -rw-r--r-- | pod/perltrap.pod | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/pod/perltrap.pod b/pod/perltrap.pod index 6f6688701f..17c576df2f 100644 --- a/pod/perltrap.pod +++ b/pod/perltrap.pod @@ -1137,26 +1137,6 @@ general subroutine traps. Includes some OS-Specific traps. =over 5 -=item * Subroutine calls provide lvalue context to arguments - -Beginning with version 5.002, all subroutine arguments are consistently -given a "value may be modified" context, since all subroutines are able -to modify their arguments by explicitly referring to C<$_[0]> etc. -This means that any array and hash elements provided as arguments -will B<always be created> if they did not exist at the time -the subroutine is called. (perl5 versions before 5.002 used to provide -lvalue context for the second and subsequent arguments, and perl4 did -not provide lvalue context to subroutine arguments at all--even though -arguments were supposedly modifiable in perl4). - - sub test { $_[0] = 1; $_[1] = 2; $_[2] = 3; } - &test($foo{'bar'}, $bar{'foo'}, $foo[5]); - print join(':', %foo), '|', join(':',%bar), '|', join(':',@foo); - - # perl4 prints: || - # perl5 < 5.002 prints: |foo:2|:::::3 - # perl5 >= 5.002 prints: bar:1|foo:2|:::::3 - =item * (Signals) Barewords that used to look like strings to Perl will now look like subroutine |