Why do you say that snippet is not BNF-able? Parts of Perl cannot be expressed by BNF, but your snippet is not one of them as far as I can tell.

statement : sub_proto
statement : sub_def

term      : anon_sub

sub_proto : ws? "sub" ws? sym_name proto? ws? ";"
sub_def   : ws? "sub" ws? sym_name proto? ws? block

anon_sub  : ws? "sub" block

sym_name  : ident "::" sym_name
sym_name  : ident

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In reply to Re^2: Perl not BNF-able?? by ikegami
in thread Perl not BNF-able?? by anonymized user 468275

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