Why Can\'t I Convert an Untyped String Constant to a String Pointer?

Understanding Cannot convert (untyped string constant) to string*

When attempting to assign a string constant to a parameter that requires a pointer to a string, such as the StorageClassName parameter in your PersistentVolumeClaim, it can result in a compiler error. This error message indicates that the compiler cannot convert the string constant, which is an untyped constant, to a pointer to a string.

Resolving the Issue

To resolve this issue, you need to use a string local variable, assign the constant string value to it, and then pass the address of that local variable using the & operator. Here's the corrected code:

<code class="go">persistentvolumeclaim := &apiv1.PersistentVolumeClaim{
    ObjectMeta: metav1.ObjectMeta{
        Name: "mysql-pv-claim",
    },
    Spec: apiv1.PersistentVolumeClaimSpec{
        // 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.
        StorageClassName: &manualStr,
    },
}</code>

By making this change, you create a typed string variable with the value of the constant string, which can then be passed as a pointer to a string because it is a reference to a string variable. This correctly satisfies the type requirement of the StorageClassName parameter.

The above is the detailed content of Why Can\'t I Convert an Untyped String Constant to a String Pointer?. For more information, please follow other related articles on the PHP Chinese website!