rst.last = '0'
		}
	}
}

// demangleConst parses:
//
//	<const> = <type> <const-data>
//	        | "p" // placeholder, shown as _
//	        | <backref>
//	<const-data> = ["n"] {<hex-digit>} "_"
func (rst *rustState) demangleConst() {
	if len(rst.str) < 1 {
		rst.fail("expected constant")
	}

	if rst.str[0] == 'B' {
		rst.backref(rst.demangleConst)
		return
	}

	if rst.str[0] == 'p' {