CODEWITHSUNDEEP
referencespecman
Nathan Fellman
Nathan Fellman

Reputation: 127638

how can I create a reference to a variable in specman?

I have the following code in specman:

var x := some.very.long.path.to.a.variable.in.another.struct;

while (x == some_value) {
    //do something that uses x;
    //wait for something

    //get a new value for x
    x = some.very.long.path.to.a.variable.in.another.struct;
};

Now, it seems wasteful to write the assignment to x twice; once during initialization and once during the loop.

What I really want to use is a reference to the long variable name, so that I could do:

var x := reference to some.very.long.path.to.a.variable.in.another.struct;

while (x == some_value) {
    //do something that uses x;
    //wait for something
    //no need to update x now since it's a reference
};

Can this be done in specman?

Upvotes: 0

Views: 2223

Answers (1)

danielpoe
danielpoe

Reputation: 3816

specman/e generally uses references for structs and lists, so if your variable type is either of it your second example should work. For integer or boolean I don't know a way to use a reference for a variable. Anyway, two ideas which might help you:

  1. Add a pointer to the other struct and bind it in a config file:

    struct a { other_variable : uint; };
struct b {
    other_struct : a;
    some_func() is {
        var x : uint = other_struct.other_variable;
        while (x == some_value) {
            x = other_struct.other_variable;
        };
    };
};
extend cfg {
    struct_a : a;
    struct_b : b;
    keep struct_b.other_struct == struct_a;
};

    UPDATE: You can find some more information on this technique in this Team Specman Post.

  2. Wrap your while loop in a function, there you can pass parameters by reference (see help pass reference):

        some_func(x : *uint) is {
        while (x == some_value) {
            // stuff ...
        };
    };

Hope this helps!

Daniel

Upvotes: 1

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