Lexical context doesn't exist when using the macro as a default value

Using Swift
,
1

When I was developing a macro, I ran into this issue. When I use a macro as a default value, there aren't any lexical contexts.

The macro for testing:

struct LexCountMacro: ExpressionMacro {
   static func expansion(
        of node: some FreestandingMacroExpansionSyntax,
        in context: some MacroExpansionContext
    ) -> ExprSyntax {
        return #""\#(raw: context.lexicalContext.count)""#
    }
}

When I use it directly, it works as I expected it to.

func main() {
    print(#lexCount) // 1
}

But when I use it as a default value, there isn't any lexical context. I expected it to be "1" since it's called inside the function main.

func test(count: String = #lexCount) -> String { count }

func main() {
    print(test()) // 0
}

I also tested to make sure the macro isn't expanding in the declaration:

struct Type {
    static func test(count: String = #lexCount) -> String { count }
}

func main() {
    print(Test.test()) // 0
}

Is this intended behavior?

Thanks in advance.