How to Pass an Untyped String Constant to a Function Expecting a String Pointer?

Error: Converting Untyped String to String Pointer

Passing an untyped string constant as an argument to a function expecting a string pointer results in the following error:

cannot convert (untyped string constant) to *string [duplicate]

Issue

The StorageClassName parameter in the provided code expects a pointer to a string. However, the provided value "manual" is an untyped string constant.

Solution

To resolve this issue, you cannot directly pass a string constant as an argument. Instead, you must first declare a string variable and assign the string constant to it. You can then pass the address of the variable as the pointer argument using the & operator.

// Declare a string local and assign the constant string literal to it
manualStr := "manual"

// Pass the address of the local variable as the parameter argument
persistentvolumeclaim := &apiv1.PersistentVolumeClaim{

    ObjectMeta: metav1.ObjectMeta{
        Name: "mysql-pv-claim",
    },
    Spec: apiv1.PersistentVolumeClaimSpec{
        StorageClassName: &manualStr,
    },
}

By following this approach, you can successfully pass the necessary string pointer as an argument to the function.

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