VHDL Component Declaration
The following VHDL component declaration is located in the VHDL Design File (.vhd) Definition ALTERA_PRIMITIVES_COMPONENTS.VHD located in the <Intel® Quartus® Prime installation directory>\libraries\vhdl\altera directory.
component tri
    port(
        a_in  :  in    std_logic;
        oe    :  in    std_logic;
        a_out :  out   std_logic);
end component;