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Diffstat (limited to 'pod/perltie.pod')
| -rw-r--r-- | pod/perltie.pod | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/pod/perltie.pod b/pod/perltie.pod index 3665f0420e..8f3a6774ae 100644 --- a/pod/perltie.pod +++ b/pod/perltie.pod @@ -794,9 +794,16 @@ READ, and possibly CLOSE, UNTIE and DESTROY. The class can also provide: BINMOD OPEN, EOF, FILENO, SEEK, TELL - if the corresponding perl operators are used on the handle. -It is especially useful when perl is embedded in some other program, -where output to STDOUT and STDERR may have to be redirected in some -special way. See nvi and the Apache module for examples. +When STDERR is tied, its PRINT method will be called to issue warnings +and error messages. This feature is temporarily disabled during the call, +which means you can use C<warn()> inside PRINT without starting a recursive +loop. And just like C<__WARN__> and C<__DIE__> handlers, STDERR's PRINT +method may be called to report parser errors, so the caveats mentioned under +L<perlvar/%SIG> apply. + +All of this is especially useful when perl is embedded in some other +program, where output to STDOUT and STDERR may have to be redirected +in some special way. See nvi and the Apache module for examples. In our example we're going to create a shouting handle. |