How to Access Package-Level Variables When a Function-Level Variable with the Same Name Exists in Go?

Accessing Constant or Package-Level Variables Over Function-Level Variables

In Go, it is common to declare constants or variables at the package level, making them accessible throughout the package. However, when a variable is also declared at the function level, it takes precedence over the package-level variable within the function's scope.

How can we refer to the constant or package-level variable instead of the function-level variable in such cases?

Explanation

Unfortunately, there is no straightforward way to refer to the package-level variable when a function-level variable with the same name is present. According to the Go specification, any identifier declared within a block, including functions, takes precedence over identifiers declared at the package level within the scope of that block.

Workarounds

To access both the package-level and function-level variables simultaneously, consider the following workarounds:

1. Use Different Names

If possible, use different names for the function-level and package-level variables to avoid conflicts. This allows you to access both variables independently.

2. Save a Copy of the Package-Level Variable

Before assigning a value to the function-level variable, store a copy of the package-level variable in a new variable with a different name. This way, you can refer to the package-level variable even within the function's scope.

3. Create a Function

Another approach is to create a function that returns the value of the package-level variable. This allows you to access the package-level variable by calling the function within the scope of the function-level variable.

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