Function par_pipe_wordcode 

pub fn par_pipe_wordcode() -> bool

Port of par_pline(int *cmplx) from Src/parse.c:894-955. pline : cmd [ ( BAR | BARAMP ) { SEPER } pline ]. Emits a WCB_PIPE header (mid for chain links, end for the last cmd) plus the optional BARAMP 2>&1 synthetic redir.