sR |I32 |dopoptosub_at |NN const PERL_CONTEXT* cxstk|I32 startingblock
s |void |save_lines |NULLOK AV *array|NN SV *sv
sR |OP* |doeval |int gimme|NULLOK OP** startop|NULLOK CV* outside|U32 seq
+sR |PerlIO *|check_type_and_open|NN const char *name|NN const char *mode
sR |PerlIO *|doopen_pm |NN const char *name|NN const char *mode
sR |bool |path_is_absolute|NN const char *name
sR |I32 |run_user_filter|int idx|NN SV *buf_sv|int maxlen