strict
Pragma for doing strict error checking within the current block. Can be
turned off by prefixing with no
:
use strict 'vars'; ... no strict 'vars';
Provides three kinds of restriction:
-
strict 'refs'
Generates runtime error if you use any symbolic references.
-
strict 'subs'
Generates compile-time error if you use a bareword identifier that’s not a predeclared subroutine.
-
strict 'vars'
Generates compile-time error if you access a variable that wasn’t declared via
my
, isn’t fully qualified, or wasn’t imported.
use strict
by itself (with no import list) is the most restrictive,
causing all possible restrictions to be imposed.
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