Passing string variables to plusargs

Question

I need to get command line options to add conditions to constraints in SystemVerilog.

I'm invoking $value$pluargs("string=%d",val) from a function call, and I need to use the parameter passed to the function as the 'string' name.

function(string name);
$value$plusargs("<name>=%d", val)
endfunction

I'm not sure how to do this. Saying $value$plusargs("%s=%d",name,val) results in a 'too many arguments' error.

Answer 1

You can use string concatenation:

module tb;
    int val = 5;

    initial begin
        $monitor("val=", val);
        foo("bar");
    end

    function void foo (string name);
        $value$plusargs({name, "=%d"}, val);
    endfunction
endmodule