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function_name

function_name(f::Function) -> Symbol

Get the name of a generic Function as a symbol, or :anonymous.

Examples

julia> function_name(f::Function)
           return f.name === nothing ? :anonymous : f.name
       end

Examples:

1. Get the name of a named function:

   julia> foo(x) = x^2;
   julia> function_name(foo)
   :foo

   In this example, the function_name function returns the symbol :foo, which is the name of the foo function.

2. Get the name of an anonymous function:

   julia> f = x -> x^2;
   julia> function_name(f)
   :anonymous

   When an anonymous function is passed to function_name, it returns the symbol :anonymous.

3. Handle a function without a name:

   julia> function_name(sin)
   :anonymous

   The sin function is a built-in function without a name, so function_name returns :anonymous.

Common mistake example:

julia> function_name(123)
ERROR: MethodError: no method matching function_name(::Int64)

In this example, function_name is mistakenly called with an Int64 argument instead of a function. Ensure that the argument provided to function_name is a valid function to avoid such errors.

See Also

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