ERsn |I32 |regcurly |NN const char *
Es |regnode*|reg_node |NN struct RExC_state_t *state|U8 op
Es |regnode*|regpiece |NN struct RExC_state_t *state|NN I32 *flagp|U32 depth
+Es |regnode*|reg_namedseq |NN struct RExC_state_t *state|NULLOK UV *valuep
Es |void |reginsert |NN struct RExC_state_t *state|U8 op|NN regnode *opnd
Es |void |regtail |NN struct RExC_state_t *state|NN regnode *p|NN const regnode *val|U32 depth
Es |U32 |join_exact |NN struct RExC_state_t *state|NN regnode *scan|NN I32 *min|U32 flags|NULLOK regnode *val|U32 depth