// DESCRIPTION: Verilator: Verilog Test module for issue #1609
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2020 Julien Margetts
// SPDX-License-Identifier: Unlicense

module t (  /*AUTOARG*/
    out,
    out2,
    in
);

  input [9:0] in;
  output reg [3:0] out;
  output reg [3:0] out2;

  // Should be no latch here since the input space is fully covered

  always @* begin
    casez (in)
      10'b0000000000: out = 4'h0;
      10'b?????????1: out = 4'h0;
      10'b????????10: out = 4'h1;
      10'b???????100: out = 4'h2;
      10'b??????1000: out = 4'h3;
      10'b?????10000: out = 4'h4;
      10'b????100000: out = 4'h5;
      10'b???1000000: out = 4'h6;
      10'b??10000000: out = 4'h7;
      10'b?100000000: out = 4'h8;
      10'b1000000000: out = 4'h9;
    endcase
  end

  // Should detect a latch here since not all paths assign
  // BUT we don't because warnOff(LATCH) is set for any always containing a
  // complex case statement

  always @* begin
    casez (in)
      10'b0000000000: out2 = 4'h0;
      10'b?????????1: out2 = 4'h0;
      10'b????????10: out2 = 4'h1;
      10'b???????100: out2 = 4'h2;
      10'b??????1000: out2 = 4'h3;
      10'b?????10000:  /* No assignement */;
      10'b????100000: out2 = 4'h5;
      10'b???1000000: out2 = 4'h6;
      10'b??10000000: out2 = 4'h7;
      10'b?100000000: out2 = 4'h8;
      10'b1000000000: out2 = 4'h9;
    endcase
  end

endmodule