Fnum is an utility trait for enum, that provides size_of_variant method.
size_of_variant returns the minimum size that specified variant requiring.
``` rust use fnum::Fnum;
enum MyEnum { A(u64), B(String), C(u64, u32, u32, u32), D { foo: u32, bar: String, } }
fn main() {
dbg!(MyEnum::sizeofvariant(0)); // => 16 (bytes required by MyEnum::A(..))
dbg!(MyEnum::sizeofvariant(1)); // => 32 (bytes required by MyEnum::B(..))
dbg!(MyEnum::sizeofvariant(2)); // => 24 (bytes required by MyEnum::C(..))
dbg!(MyEnum::sizeofvariant(3)); // => 32 (bytes required by MyEnum::D{..})
}
```
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Licensed under the MIT License.