verilator/test_regress/t/t_interface_import_param.v

// DESCRIPTION: Verilator: Verilog Test module
//
// A test that a package import declaration can precede a parameter port list
// in an interface declaration. See IEEE 1800-2023 25.3.
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2013 Jeremy Bennett
// SPDX-License-Identifier: CC0-1.0

package bus_pkg;
  parameter WIDTH = 8;
endpackage

interface simple_bus
  import bus_pkg::*;  // Import preceding parameters.
#(
    p_width = WIDTH
) (
    input logic clk
);

  logic req, gnt;
  logic [p_width-1:0] addr;
  logic [p_width-1:0] data;

  modport slave(input req, addr, clk, output gnt, input data);

  modport master(input gnt, clk, output req, addr, output data);

endinterface

module mem (
    simple_bus a
);
  logic avail;
  always @(posedge a.clk) a.gnt <= a.req & avail;
  initial begin
    if ($bits(a.data) != 8) $stop;
    $write("*-* All Finished *-*\n");
    $finish;
  end
endmodule

module t (
    input clk
);
  simple_bus sb (clk);
  mem mem (sb.slave);
endmodule