verilator/test_regress/t/t_func_defaults.v

// DESCRIPTION: Verilator: Test for warning (not error) on improperly width'ed
// default function argument
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2015 Todd Strader
// SPDX-License-Identifier: CC0-1.0

parameter logic BAR = 1'b1;

function automatic logic calc_y;
  return 1'b1;
endfunction

function automatic logic [1:0] foo(input logic x = BAR, input logic y = calc_y());
  return x + y;
endfunction

class Foo;
  static int x;
  static function int get_x;
    return x;
  endfunction
endclass

function int mult2(int x = Foo::get_x());
  return 2 * x;
endfunction

module t;
  logic [1:0] foo_val;

  initial begin
    foo_val = foo();
    if (foo_val != 2'b10) $stop;

    if (mult2(1) != 2) $stop;
    if (mult2() != 0) $stop;
    Foo::x = 30;
    if (mult2() != 60) $stop;

    $write("*-* All Finished *-*\n");
    $finish;
  end

endmodule