perllexwarn (1) - Linux Manuals
perllexwarn: Perl Lexical Warnings
perllexwarn - Perl Lexical Warnings
DESCRIPTIONPerl v5.6.0 introduced lexical control over the handling of warnings by category. The "warnings" pragma generally replaces the command line flag -w. Documentation on the use of lexical warnings, once partly found in this document, is now found in the warnings documentation.