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| author | Karl Williamson <khw@khw-desktop.(none)> | 2010-07-09 13:21:33 -0600 |
|---|---|---|
| committer | Karl Williamson <khw@khw-desktop.(none)> | 2010-07-13 17:09:53 -0600 |
| commit | 5ff2e4c00484f467453335cd2b906b7ce1e33a58 (patch) | |
| tree | 2fad934c25a3cbbef62e040529bf1177866dc253 | |
| parent | cc26ddeba958e8f9785b940e55b354e757252c7f (diff) | |
| download | perl-5ff2e4c00484f467453335cd2b906b7ce1e33a58.tar.gz | |
perlpragma.pod: Clarify that runtime %^H is ro
You can use (caller(0))[10} to retrieve the contents of %^H, and any
changes you make to your local copy will be lost, but that may not be
immediately apparent to the pod reader.
| -rw-r--r-- | pod/perlpragma.pod | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/pod/perlpragma.pod b/pod/perlpragma.pod index 51292a8a12..856014438e 100644 --- a/pod/perlpragma.pod +++ b/pod/perlpragma.pod @@ -117,8 +117,8 @@ for the user's code. User pragmata store their state by writing to the magical hash C<%^H>, hence these two routines manipulate it. The state information in C<%^H> is -stored in the optree, and can be retrieved at runtime with C<caller()>, at -index 10 of the list of returned results. In the example pragma, retrieval +stored in the optree, and can be retrieved read-only at runtime with C<caller()>, +at index 10 of the list of returned results. In the example pragma, retrieval is encapsulated into the routine C<in_effect()>, which takes as parameter the number of call frames to go up to find the value of the pragma in the user's script. This uses C<caller()> to determine the value of |