Unexpected result from setprecision

General Usage
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2

I think the problem is that the @big_str macro is evaluated and parses the value at compile time in the global scope before the setprecision call happens. As a workaround:

julia> setprecision(512) do
           b=parse(BigFloat, "1.0")
           @show precision(b)
       end
precision(b) = 512
512
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