// address such as Unix domain socket path into a valid, ignored
		// Host header (see https://go.dev/issue/61431).
		//
		// We don't preserve the truncation, because sending an altered
		// header field opens a smuggling vector. Instead, zero out the
		// Host header entirely if it isn't valid. (An empty Host is valid;
		// see RFC 9112 Section 3.2.)
		//
		// Return an error if we're sending to a proxy, since the proxy

	}

	return arr
}

// vectorType parses:
//
//	<vector-type> ::= Dv <number> _ <type>
//	              ::= Dv _ <expression> _ <type>
func (st *state) vectorType(isCast bool) AST {
	if len(st.str) == 0 {
		st.fail("expected vector dimension")
	}

	var dim AST
	if st.str[0] == '_' {
		st.advance(1)
		dim = st.expression()
	} else {