// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2010 Wilson Snyder
// SPDX-License-Identifier: CC0-1.0

typedef enum {
  EN_ZERO,
  EN_ONE
} En_t;

module t (
    input clk
);

  // Insure that we can declare a type with a function declaration
  function enum integer {EF_TRUE = 1, EF_FALSE = 0} f_enum_inv(input a);
    f_enum_inv = a ? EF_FALSE : EF_TRUE;
  endfunction
  initial begin
    if (f_enum_inv(1) != 0) $stop;
    if (f_enum_inv(0) != 1) $stop;
  end

  En_t a, z;

  sub sub (  /*AUTOINST*/
      // Outputs
      .z(z),
      // Inputs
      .a(a)
  );

  integer cyc;
  initial cyc = 1;
  always @(posedge clk) begin
    if (cyc != 0) begin
      cyc <= cyc + 1;
      if (cyc == 1) begin
        a <= EN_ZERO;
      end
      if (cyc == 2) begin
        a <= EN_ONE;
        if (z != EN_ONE) $stop;
      end
      if (cyc == 3) begin
        if (z != EN_ZERO) $stop;
      end
      if (cyc == 9) begin
        $write("*-* All Finished *-*\n");
        $finish;
      end
    end
  end

endmodule

module sub (
    input En_t a,
    output En_t z
);
  always @* z = (a == EN_ONE) ? EN_ZERO : EN_ONE;
endmodule

// Local Variables:
// verilog-typedef-regexp: "_t$"
// End: