How Can Duplicate Field Names Be Resolved When Embedding Structs?

Embedding Structs with Duplicate Field Names

When embedding two structs with the same field name, such as in the example provided, the result is a compiler error indicating duplicate field names. This occurs because the embedded field would have the same name in both embedded structs.

Alternative Approach using Type Aliases

One alternative to embedding structs with duplicate field names is to use type aliases. A type alias creates an alternate name for an existing type, allowing you to refer to the embedded struct using a different name.

For example, the following code uses a type alias to resolve the duplicate field name issue:

<code class="go">type SqlStore = sql.Store // this is a type alias

type datastore struct {
    *SqlStore
    *file.Store
}</code>

In this code, SqlStore is a type alias for the existing type sql.Store. The datastore struct then embeds both *SqlStore and *file.Store without any name conflicts.

Advantages of Using Type Aliases

Using type aliases provides several advantages:

• Eliminates duplicate field name conflicts. The type alias creates an alternative name for the embedded struct, resolving the problem of having two fields with the same name.
• Preserves the original type. The type alias does not create a new type but rather provides an alternative name for an existing type. This means that all the methods and functionality of the original type are still available through the type alias.
• Improves code readability. By using a type alias to reference the embedded struct, the code becomes more concise and easier to understand.

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