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Diffstat (limited to 'pod/perldelta.pod')
| -rw-r--r-- | pod/perldelta.pod | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/pod/perldelta.pod b/pod/perldelta.pod index 70d2216e4d..178812dcfe 100644 --- a/pod/perldelta.pod +++ b/pod/perldelta.pod @@ -238,9 +238,32 @@ emulating, and always flushes before (un)locking. =item printf and sprintf -now support "%i" as a synonym for "%d", and the "h" modifier. -So "%hi" means "short integer in decimal", and "%ho" means -"unsigned short integer as octal". +Perl now implements these functions itself; it doesn't use the C +library function sprintf() any more, except for floating-point +numbers, and even then only known flags are allowed. As a result, it +is now possible to know which conversions and flags will work, and +what they will do. + +The new conversions in Perl's sprintf() are: + + %i a synonym for %d + %p a pointer (the address of the Perl value, in hexadecimal) + %n special: B<stores> into the next variable in the parameter + list the number of characters printed so far + +The new flags that go between the C<%> and the conversion are: + + # prefix octal with "0", hex with "0x" + h interpret integer as C type "short" or "unsigned short" + V interpret integer as Perl's standard integer type + +Also, where a number would appear in the flags, an asterisk ("*") may +be used instead, in which case Perl uses the next item in the +parameter list as the given number (that is, as the field width or +precision). If a field width obtained through "*" is negative, it has +the same effect as the '-' flag: left-justification. + +See L<perlfunc/sprintf> for a complete list of conversion and flags. =item keys as an lvalue |