passing string array to a function

This is a discussion on passing string array to a function within the Tech Board forums, part of the Community Boards category; Hi I am trying to pass the string array to a function print_it(). I get the following error: Error: Reference ...

  1. #1
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    Question passing string array to a function

    Hi
    I am trying to pass the string array to a function print_it(). I get the following error:

    Error: Reference out of bound array word
    Trying to take a reference to an array word with an out of bounds index

    I think I am making some basic mistake in passing string array to the function. Can anyone please help me out???

    Sorry, the code is written in system verilog but it is similar to C++....

    The code is shown below:

    Code:
    class A;
    
    string mode1[3] = '{"chip", "boundary", "chain"};
    string mode2[2] = '{"chip", "chain"};
    
    endclass : A
    class B;
    
    function void print_it(string details[]);
    A test_mode;
    test_mode = new();
    foreach(details[i])
     begin
    test_mode.mode1=xxx
    $display(details[i]);
    end
    endfunction: print_it
    
    endclass : B
    
    class C;
    
    A test_mode;
    B printing;
    
    printing.print_it(test_mode.mode1);
    
    endclass:C

  2. #2
    C++ Witch laserlight's Avatar
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    So, what is your C++ code? If you really mean to say that you are programming in Verilog instead, then this is not the right place to be asking this question.
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    I am programming in system verilog.. but the problem I am getting is similar to C++... passing the string array to function is similar as we do in C++... So my point is that the code is similar to C++

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    C++ Witch laserlight's Avatar
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    *Thread moved to Tech board*
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  5. #5
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by debugg
    but the problem I am getting is similar to C++... passing the string array to function is similar as we do in C++... So my point is that the code is similar to C++
    Yes, some things are similiar, but the language is sufficiently different that, as a C++ programmer with no prior knowledge of system verilog, I cannot help you beyond telling you that you are probably accessing an array out of bounds, but you probably already guessed this from the error message.
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    ok. so let me put it in this way now.

    Code:
    int main(); { string mode1[3] = '{"chip", "boundary", "chain"}; string mode2[2] = '{"chip", "chain"}; print_it(mode1); } function void print_it(string details[]); foreach(details[i]) begin test_mode.mode1=xxx $display(details[i]); end endfunction: print_it
    If I do something like above, I get the same error. The problem is only with passing string array as an argument to the function. I dont know what I am missing in it now???

  7. #7
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    in C you could do:

    Code:
    void print_it(string* details, int sizeOfArray)
    {
       for( int i=0; i<sizeOfArray; i++ )
       {       cout << detailts[i] << endl;
       }
    }
    no idea if it works in verhilog tho

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    @opply
    thanks a lot for the reply..

    Is there any other way we can write the following line in C++:
    Code:
    void print_it(string* details, int sizeOfArray)
    


    I tried to do something like following but it gives me syntax error:
    Code:
    void print_it(string details[int sizeOfArray])
    


  9. #9
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by debugg
    Is there any other way we can write the following line in C++:
    I might write it as:
    Code:
    void print_it(const vector<string>& details)
    because the vector<string> comes with size information, but has nothing to do with system verilog. Then there are other, more generic ways, but again this may not be applicable to the problem you are trying to solve in system verilog.
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