Enable comments in preprocessor

[zarubaf]

Thanks for this really nice parser. I know that a complete SV parser is a huge undertaking.

I would be interested in similar behavior to #4. I can see that the preprocessor strips comments so they don't appear in the AST later.

When adding (preprocessor.rs:258):

NodeEvent::Enter(RefNode::Comment(x)) => {
                let locate: Locate = x.try_into().unwrap();
                let range = Range::new(locate.offset, locate.offset + locate.len);
                ret.push(locate.str(&s), Some((path.as_ref(), range)));
            }

I see comments after preprocessing, but I get weird behaviour after a macro expansion:
Input:

`define IMPORT(__pkg)  \
    import __pkg::*;
    
module lala;
    // pragma translate_off
    // Test run
    `IMPORT(body2_import_pkg) // this is a macro
    always_comb begin
        a <= b;
    end
    // pragma translate_on
endmodule

Expected:

    
module lala;
    // pragma translate_off
    // Test run
    import body2_import_pkg::*;  // this is a macro
    always_comb begin
        a <= b;
    end
    // pragma translate_on
endmodule

Observed:

 
    
module lala;
    // pragma translate_off
    // Test run
    import body2_import_pkg::*; // this is a macroalways_comb begin
        a <= b;
    end
    // pragma translate_on
endmodule

Even without comments, the indentation becomes strange after macro expansion but it never triggers any illegal behavior, only when line comments (//) are enabled this becomes problematic.

[zarubaf]

Is there any comment or update on this? Even a won't fix would be fine somehow. I appreciate your input on this.