Current state of the interpreter.
$^S State--------- -------------------------------------undef Parsing module, eval, or main programtrue (1) Executing an eval or try blockfalse (0) OtherwiseThe first state may happen in$SIG{__DIE__} and$SIG{__WARN__} handlers.
The English name $EXCEPTIONS_BEING_CAUGHT is slightly misleading, because theundef value does not indicate whether exceptions are being caught, since compilation of the main program does not catch exceptions.
This variable was added in Perl 5.004.
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