Struct protobuf_codec::field::Oneof

pub struct Oneof<F> { /* fields omitted */ }

Decoder and encoder for Oneof fields.

Methods

impl<F> Oneof<F>

pub fn new(fields: F) -> Self

Makes a new Oneof instance.

Trait Implementations

impl<F: Debug> Debug for Oneof<F>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<F: Default> Default for Oneof<F>

fn default() -> Oneof<F>

Returns the "default value" for a type.

impl<A, B> Decode for Oneof<(A, B)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode, 

type Item = Branch2<A::Item, B::Item>

The type of items to be decoded.

fn decode(&mut self, buf: &[u8], eos: Eos) -> Result<usize>

Consumes the given buffer (a part of a byte sequence), and proceeds the decoding process.

fn finish_decoding(&mut self) -> Result<Self::Item>

Finishes the current decoding process and returns the decoded item.

fn is_idle(&self) -> bool

Returns true if there are no items to be decoded by the decoder at the next invocation of decode method, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the lower bound of the number of bytes needed to decode the next item.

impl<A, B> FieldDecode for Oneof<(A, B)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode, 

fn start_decoding(&mut self, tag: Tag) -> Result<bool>

Tries to start decoding a field.

impl<A, B> RequiredFieldDecode for Oneof<(A, B)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode, 

fn is_present(&self) -> bool

Returns true if this field has been present in the target input stream, otherwise false.

impl<A, B, C> Decode for Oneof<(A, B, C)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode, 

type Item = Branch3<A::Item, B::Item, C::Item>

The type of items to be decoded.

fn decode(&mut self, buf: &[u8], eos: Eos) -> Result<usize>

Consumes the given buffer (a part of a byte sequence), and proceeds the decoding process.

fn finish_decoding(&mut self) -> Result<Self::Item>

Finishes the current decoding process and returns the decoded item.

fn is_idle(&self) -> bool

Returns true if there are no items to be decoded by the decoder at the next invocation of decode method, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the lower bound of the number of bytes needed to decode the next item.

impl<A, B, C> FieldDecode for Oneof<(A, B, C)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode, 

fn start_decoding(&mut self, tag: Tag) -> Result<bool>

Tries to start decoding a field.

impl<A, B, C> RequiredFieldDecode for Oneof<(A, B, C)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode, 

fn is_present(&self) -> bool

Returns true if this field has been present in the target input stream, otherwise false.

impl<A, B, C, D> Decode for Oneof<(A, B, C, D)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode, 

type Item = Branch4<A::Item, B::Item, C::Item, D::Item>

The type of items to be decoded.

fn decode(&mut self, buf: &[u8], eos: Eos) -> Result<usize>

Consumes the given buffer (a part of a byte sequence), and proceeds the decoding process.

fn finish_decoding(&mut self) -> Result<Self::Item>

Finishes the current decoding process and returns the decoded item.

fn is_idle(&self) -> bool

Returns true if there are no items to be decoded by the decoder at the next invocation of decode method, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the lower bound of the number of bytes needed to decode the next item.

impl<A, B, C, D> FieldDecode for Oneof<(A, B, C, D)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode, 

fn start_decoding(&mut self, tag: Tag) -> Result<bool>

Tries to start decoding a field.

impl<A, B, C, D> RequiredFieldDecode for Oneof<(A, B, C, D)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode, 

fn is_present(&self) -> bool

Returns true if this field has been present in the target input stream, otherwise false.

impl<A, B, C, D, E> Decode for Oneof<(A, B, C, D, E)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode, 

type Item = Branch5<A::Item, B::Item, C::Item, D::Item, E::Item>

The type of items to be decoded.

fn decode(&mut self, buf: &[u8], eos: Eos) -> Result<usize>

Consumes the given buffer (a part of a byte sequence), and proceeds the decoding process.

fn finish_decoding(&mut self) -> Result<Self::Item>

Finishes the current decoding process and returns the decoded item.

fn is_idle(&self) -> bool

Returns true if there are no items to be decoded by the decoder at the next invocation of decode method, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the lower bound of the number of bytes needed to decode the next item.

impl<A, B, C, D, E> FieldDecode for Oneof<(A, B, C, D, E)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode, 

fn start_decoding(&mut self, tag: Tag) -> Result<bool>

Tries to start decoding a field.

impl<A, B, C, D, E> RequiredFieldDecode for Oneof<(A, B, C, D, E)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode, 

fn is_present(&self) -> bool

Returns true if this field has been present in the target input stream, otherwise false.

impl<A, B, C, D, E, F> Decode for Oneof<(A, B, C, D, E, F)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode,
    F: RequiredFieldDecode, 

type Item = Branch6<A::Item, B::Item, C::Item, D::Item, E::Item, F::Item>

The type of items to be decoded.

fn decode(&mut self, buf: &[u8], eos: Eos) -> Result<usize>

Consumes the given buffer (a part of a byte sequence), and proceeds the decoding process.

fn finish_decoding(&mut self) -> Result<Self::Item>

Finishes the current decoding process and returns the decoded item.

fn is_idle(&self) -> bool

Returns true if there are no items to be decoded by the decoder at the next invocation of decode method, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the lower bound of the number of bytes needed to decode the next item.

impl<A, B, C, D, E, F> FieldDecode for Oneof<(A, B, C, D, E, F)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode,
    F: RequiredFieldDecode, 

fn start_decoding(&mut self, tag: Tag) -> Result<bool>

Tries to start decoding a field.

impl<A, B, C, D, E, F> RequiredFieldDecode for Oneof<(A, B, C, D, E, F)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode,
    F: RequiredFieldDecode, 

fn is_present(&self) -> bool

Returns true if this field has been present in the target input stream, otherwise false.

impl<A, B, C, D, E, F, G> Decode for Oneof<(A, B, C, D, E, F, G)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode,
    F: RequiredFieldDecode,
    G: RequiredFieldDecode, 

type Item = Branch7<A::Item, B::Item, C::Item, D::Item, E::Item, F::Item, G::Item>

The type of items to be decoded.

fn decode(&mut self, buf: &[u8], eos: Eos) -> Result<usize>

Consumes the given buffer (a part of a byte sequence), and proceeds the decoding process.

fn finish_decoding(&mut self) -> Result<Self::Item>

Finishes the current decoding process and returns the decoded item.

fn is_idle(&self) -> bool

Returns true if there are no items to be decoded by the decoder at the next invocation of decode method, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the lower bound of the number of bytes needed to decode the next item.

impl<A, B, C, D, E, F, G> FieldDecode for Oneof<(A, B, C, D, E, F, G)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode,
    F: RequiredFieldDecode,
    G: RequiredFieldDecode, 

fn start_decoding(&mut self, tag: Tag) -> Result<bool>

Tries to start decoding a field.

impl<A, B, C, D, E, F, G> RequiredFieldDecode for Oneof<(A, B, C, D, E, F, G)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode,
    F: RequiredFieldDecode,
    G: RequiredFieldDecode, 

fn is_present(&self) -> bool

Returns true if this field has been present in the target input stream, otherwise false.

impl<A, B, C, D, E, F, G, H> Decode for Oneof<(A, B, C, D, E, F, G, H)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode,
    F: RequiredFieldDecode,
    G: RequiredFieldDecode,
    H: RequiredFieldDecode, 

type Item = Branch8<A::Item, B::Item, C::Item, D::Item, E::Item, F::Item, G::Item, H::Item>

The type of items to be decoded.

fn decode(&mut self, buf: &[u8], eos: Eos) -> Result<usize>

Consumes the given buffer (a part of a byte sequence), and proceeds the decoding process.

fn finish_decoding(&mut self) -> Result<Self::Item>

Finishes the current decoding process and returns the decoded item.

fn is_idle(&self) -> bool

Returns true if there are no items to be decoded by the decoder at the next invocation of decode method, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the lower bound of the number of bytes needed to decode the next item.

impl<A, B, C, D, E, F, G, H> FieldDecode for Oneof<(A, B, C, D, E, F, G, H)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode,
    F: RequiredFieldDecode,
    G: RequiredFieldDecode,
    H: RequiredFieldDecode, 

fn start_decoding(&mut self, tag: Tag) -> Result<bool>

Tries to start decoding a field.

impl<A, B, C, D, E, F, G, H> RequiredFieldDecode for Oneof<(A, B, C, D, E, F, G, H)> where
    A: RequiredFieldDecode,
    B: RequiredFieldDecode,
    C: RequiredFieldDecode,
    D: RequiredFieldDecode,
    E: RequiredFieldDecode,
    F: RequiredFieldDecode,
    G: RequiredFieldDecode,
    H: RequiredFieldDecode, 

fn is_present(&self) -> bool

Returns true if this field has been present in the target input stream, otherwise false.

impl<A, B> Encode for Oneof<(A, B)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode, 

type Item = Branch2<A::Item, B::Item>

The type of items to be encoded.

fn encode(&mut self, buf: &mut [u8], eos: Eos) -> Result<usize>

Encodes the items in the encoder and writes the encoded bytes to the given buffer.

fn start_encoding(&mut self, item: Self::Item) -> Result<()>

Tries to start encoding the given item.

fn is_idle(&self) -> bool

Returns true if there are no items to be encoded in the encoder, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the number of bytes required to encode all the items in the encoder.

impl<A, B> FieldEncode for Oneof<(A, B)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode, 

impl<A, B> RequiredFieldEncode for Oneof<(A, B)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode, 

impl<A, B> SizedEncode for Oneof<(A, B)> where
    A: RequiredFieldEncode + SizedEncode,
    B: RequiredFieldEncode + SizedEncode, 

fn exact_requiring_bytes(&self) -> u64

Returns the exact number of bytes required to encode all the items remaining in the encoder.

impl<A, B, C> Encode for Oneof<(A, B, C)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode, 

type Item = Branch3<A::Item, B::Item, C::Item>

The type of items to be encoded.

fn encode(&mut self, buf: &mut [u8], eos: Eos) -> Result<usize>

Encodes the items in the encoder and writes the encoded bytes to the given buffer.

fn start_encoding(&mut self, item: Self::Item) -> Result<()>

Tries to start encoding the given item.

fn is_idle(&self) -> bool

Returns true if there are no items to be encoded in the encoder, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the number of bytes required to encode all the items in the encoder.

impl<A, B, C> FieldEncode for Oneof<(A, B, C)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode, 

impl<A, B, C> RequiredFieldEncode for Oneof<(A, B, C)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode, 

impl<A, B, C> SizedEncode for Oneof<(A, B, C)> where
    A: RequiredFieldEncode + SizedEncode,
    B: RequiredFieldEncode + SizedEncode,
    C: RequiredFieldEncode + SizedEncode, 

fn exact_requiring_bytes(&self) -> u64

Returns the exact number of bytes required to encode all the items remaining in the encoder.

impl<A, B, C, D> Encode for Oneof<(A, B, C, D)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode, 

type Item = Branch4<A::Item, B::Item, C::Item, D::Item>

The type of items to be encoded.

fn encode(&mut self, buf: &mut [u8], eos: Eos) -> Result<usize>

Encodes the items in the encoder and writes the encoded bytes to the given buffer.

fn start_encoding(&mut self, item: Self::Item) -> Result<()>

Tries to start encoding the given item.

fn is_idle(&self) -> bool

Returns true if there are no items to be encoded in the encoder, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the number of bytes required to encode all the items in the encoder.

impl<A, B, C, D> FieldEncode for Oneof<(A, B, C, D)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode, 

impl<A, B, C, D> RequiredFieldEncode for Oneof<(A, B, C, D)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode, 

impl<A, B, C, D> SizedEncode for Oneof<(A, B, C, D)> where
    A: RequiredFieldEncode + SizedEncode,
    B: RequiredFieldEncode + SizedEncode,
    C: RequiredFieldEncode + SizedEncode,
    D: RequiredFieldEncode + SizedEncode, 

fn exact_requiring_bytes(&self) -> u64

Returns the exact number of bytes required to encode all the items remaining in the encoder.

impl<A, B, C, D, E> Encode for Oneof<(A, B, C, D, E)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode, 

type Item = Branch5<A::Item, B::Item, C::Item, D::Item, E::Item>

The type of items to be encoded.

fn encode(&mut self, buf: &mut [u8], eos: Eos) -> Result<usize>

Encodes the items in the encoder and writes the encoded bytes to the given buffer.

fn start_encoding(&mut self, item: Self::Item) -> Result<()>

Tries to start encoding the given item.

fn is_idle(&self) -> bool

Returns true if there are no items to be encoded in the encoder, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the number of bytes required to encode all the items in the encoder.

impl<A, B, C, D, E> FieldEncode for Oneof<(A, B, C, D, E)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode, 

impl<A, B, C, D, E> RequiredFieldEncode for Oneof<(A, B, C, D, E)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode, 

impl<A, B, C, D, E> SizedEncode for Oneof<(A, B, C, D, E)> where
    A: RequiredFieldEncode + SizedEncode,
    B: RequiredFieldEncode + SizedEncode,
    C: RequiredFieldEncode + SizedEncode,
    D: RequiredFieldEncode + SizedEncode,
    E: RequiredFieldEncode + SizedEncode, 

fn exact_requiring_bytes(&self) -> u64

Returns the exact number of bytes required to encode all the items remaining in the encoder.

impl<A, B, C, D, E, F> Encode for Oneof<(A, B, C, D, E, F)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode,
    F: RequiredFieldEncode, 

type Item = Branch6<A::Item, B::Item, C::Item, D::Item, E::Item, F::Item>

The type of items to be encoded.

fn encode(&mut self, buf: &mut [u8], eos: Eos) -> Result<usize>

Encodes the items in the encoder and writes the encoded bytes to the given buffer.

fn start_encoding(&mut self, item: Self::Item) -> Result<()>

Tries to start encoding the given item.

fn is_idle(&self) -> bool

Returns true if there are no items to be encoded in the encoder, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the number of bytes required to encode all the items in the encoder.

impl<A, B, C, D, E, F> FieldEncode for Oneof<(A, B, C, D, E, F)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode,
    F: RequiredFieldEncode, 

impl<A, B, C, D, E, F> RequiredFieldEncode for Oneof<(A, B, C, D, E, F)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode,
    F: RequiredFieldEncode, 

impl<A, B, C, D, E, F> SizedEncode for Oneof<(A, B, C, D, E, F)> where
    A: RequiredFieldEncode + SizedEncode,
    B: RequiredFieldEncode + SizedEncode,
    C: RequiredFieldEncode + SizedEncode,
    D: RequiredFieldEncode + SizedEncode,
    E: RequiredFieldEncode + SizedEncode,
    F: RequiredFieldEncode + SizedEncode, 

fn exact_requiring_bytes(&self) -> u64

Returns the exact number of bytes required to encode all the items remaining in the encoder.

impl<A, B, C, D, E, F, G> Encode for Oneof<(A, B, C, D, E, F, G)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode,
    F: RequiredFieldEncode,
    G: RequiredFieldEncode, 

type Item = Branch7<A::Item, B::Item, C::Item, D::Item, E::Item, F::Item, G::Item>

The type of items to be encoded.

fn encode(&mut self, buf: &mut [u8], eos: Eos) -> Result<usize>

Encodes the items in the encoder and writes the encoded bytes to the given buffer.

fn start_encoding(&mut self, item: Self::Item) -> Result<()>

Tries to start encoding the given item.

fn is_idle(&self) -> bool

Returns true if there are no items to be encoded in the encoder, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the number of bytes required to encode all the items in the encoder.

impl<A, B, C, D, E, F, G> FieldEncode for Oneof<(A, B, C, D, E, F, G)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode,
    F: RequiredFieldEncode,
    G: RequiredFieldEncode, 

impl<A, B, C, D, E, F, G> RequiredFieldEncode for Oneof<(A, B, C, D, E, F, G)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode,
    F: RequiredFieldEncode,
    G: RequiredFieldEncode, 

impl<A, B, C, D, E, F, G> SizedEncode for Oneof<(A, B, C, D, E, F, G)> where
    A: RequiredFieldEncode + SizedEncode,
    B: RequiredFieldEncode + SizedEncode,
    C: RequiredFieldEncode + SizedEncode,
    D: RequiredFieldEncode + SizedEncode,
    E: RequiredFieldEncode + SizedEncode,
    F: RequiredFieldEncode + SizedEncode,
    G: RequiredFieldEncode + SizedEncode, 

fn exact_requiring_bytes(&self) -> u64

Returns the exact number of bytes required to encode all the items remaining in the encoder.

impl<A, B, C, D, E, F, G, H> Encode for Oneof<(A, B, C, D, E, F, G, H)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode,
    F: RequiredFieldEncode,
    G: RequiredFieldEncode,
    H: RequiredFieldEncode, 

type Item = Branch8<A::Item, B::Item, C::Item, D::Item, E::Item, F::Item, G::Item, H::Item>

The type of items to be encoded.

fn encode(&mut self, buf: &mut [u8], eos: Eos) -> Result<usize>

Encodes the items in the encoder and writes the encoded bytes to the given buffer.

fn start_encoding(&mut self, item: Self::Item) -> Result<()>

Tries to start encoding the given item.

fn is_idle(&self) -> bool

Returns true if there are no items to be encoded in the encoder, otherwise false.

fn requiring_bytes(&self) -> ByteCount

Returns the number of bytes required to encode all the items in the encoder.

impl<A, B, C, D, E, F, G, H> FieldEncode for Oneof<(A, B, C, D, E, F, G, H)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode,
    F: RequiredFieldEncode,
    G: RequiredFieldEncode,
    H: RequiredFieldEncode, 

impl<A, B, C, D, E, F, G, H> RequiredFieldEncode for Oneof<(A, B, C, D, E, F, G, H)> where
    A: RequiredFieldEncode,
    B: RequiredFieldEncode,
    C: RequiredFieldEncode,
    D: RequiredFieldEncode,
    E: RequiredFieldEncode,
    F: RequiredFieldEncode,
    G: RequiredFieldEncode,
    H: RequiredFieldEncode, 

impl<A, B, C, D, E, F, G, H> SizedEncode for Oneof<(A, B, C, D, E, F, G, H)> where
    A: RequiredFieldEncode + SizedEncode,
    B: RequiredFieldEncode + SizedEncode,
    C: RequiredFieldEncode + SizedEncode,
    D: RequiredFieldEncode + SizedEncode,
    E: RequiredFieldEncode + SizedEncode,
    F: RequiredFieldEncode + SizedEncode,
    G: RequiredFieldEncode + SizedEncode,
    H: RequiredFieldEncode + SizedEncode, 

fn exact_requiring_bytes(&self) -> u64

Returns the exact number of bytes required to encode all the items remaining in the encoder.