verilator/test_regress/t/t_lint_width_cast.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2024 Wilson Snyder
// SPDX-License-Identifier: CC0-1.0

// verilog_format: off
`define stop $stop
`define checkh(gotv,expv) do if ((gotv) !== (expv)) begin $write("%%Error: %s:%0d:  got='h%x exp='h%x\n", `__FILE__,`__LINE__, (gotv), (expv)); `stop; end while(0);
// verilog_format: on

module t;

  wire [5:0] b1 = 6'b101101;
  wire [5:0] b2 = 6'b011110;
  logic [5:0] a6;
  logic [9:0] a10;

  initial begin
    // issue #3417
    a6 = b2 - b1;
    `checkh(a6, 6'h31);
    a10 = 10'(b2 - b1);
    `checkh(a10, 10'h3f1);  // This being not 31 indicates operator expands
    `checkh($bits(10'(b1)), 10);
    `checkh($bits(10'(b2 - b1)), 10);
    `checkh($bits(b2 - b1), 6);
    $write("*-* All Finished *-*\n");
    $finish;
  end

endmodule