suggested improved comments for ex in 12.4.3

From: Francoise Martinolle (fm@cadence.com)
Date: Mon Apr 05 2004 - 10:20:27 PDT

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    My improved comments are in green color

    Example_12_4_3.v
    // Example in section 12.4.3 (reformatted and comments added)
    module top;
    parameter genblk2 = 0;
    genvar i;
    // generate scope is implicitly named genblk1
    if (genblk2) reg a; // top.genblk1.a
    else reg b; // top.genblk1.b

    // generate scope is implicitly named genblk02 as genblk2 is already a
    declared identifier
    if (genblk2) reg a; // top.genblk02.a
    else reg b; // top.genblk02.b

    // generate scope would have been named genblk3 but is explicitly named g1
    for (i = 0; i < 1; i = i + 1) begin : g1 // block name
    // generate scope would be named genblk1 as the first nested scope inside of g1
    if (1) reg a; // top.g1[0].genblk1.a
    end

    // generate scope is implicitly named genblk4 as the previous generate
    construct would have been named genblk3 if it would not have been
    explicitly named g1
    for (i = 0; i < 1; i = i + 1)
    // generate scope is implicitly named genblk1 as the first nested scope of
    genblk4
    if (1) reg a; // top.genblk4[0].genblk1.a

    // generate scope is implicitly named genblk5
    if (1) reg a; // top.genblk5.a
    endmodule

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