pub struct ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone,
{ pub value_balance: Amount, pub transfers: TransferData<AnchorV>, pub binding_sig: Signature<Binding>, }
Expand description

A bundle of Spend and Output descriptions and signature data.

Spend and Output descriptions are optional, but Zcash transactions must include a binding signature if and only if there is at least one Spend or Output description. This wrapper type bundles at least one Spend or Output description with the required signature data, so that an Option<ShieldedData> correctly models the presence or absence of any shielded data.

§Differences between Transaction Versions

The Sapling value_balance field is optional in Transaction::V5, but required in Transaction::V4. In both cases, if there is no ShieldedData, then the field value must be zero. Therefore, we only need to store value_balance when there is some Sapling ShieldedData.

In Transaction::V4, each Spend has its own anchor. In Transaction::V5, there is a single shared_anchor for the entire transaction, which is only present when there is at least one spend. These structural differences are modeled using the AnchorVariant type trait and TransferData enum.

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§value_balance: Amount

The net value of Sapling spend transfers minus output transfers. Denoted as valueBalanceSapling in the spec.

§transfers: TransferData<AnchorV>

A bundle of spends and outputs, containing at least one spend or output, in the order they appear in the transaction.

In V5 transactions, also contains a shared anchor, if there are any spends.

§binding_sig: Signature<Binding>

A signature on the transaction hash. Denoted as bindingSigSapling in the spec.

Implementations§

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impl<AnchorV> ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone, Spend<PerSpendAnchor>: From<(Spend<AnchorV>, AnchorV::Shared)>,

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pub fn anchors(&self) -> impl Iterator<Item = Root> + '_

Iterate over the Spends for this transaction, returning deduplicated tree::Roots, regardless of the underlying transaction version.

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pub fn spends_per_anchor( &self ) -> impl Iterator<Item = Spend<PerSpendAnchor>> + '_

Iterate over the Spends for this transaction, returning Spend<PerSpendAnchor> regardless of the underlying transaction version.

§Correctness

Do not use this function for serialization.

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impl<AnchorV> ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone,

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pub fn spends(&self) -> impl Iterator<Item = &Spend<AnchorV>>

Iterate over the Spends for this transaction, returning them as their generic type.

§Correctness

Use this function for serialization.

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pub fn outputs(&self) -> impl Iterator<Item = &Output>

Iterate over the Outputs for this transaction, in the order they appear in it.

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pub fn shared_anchor(&self) -> Option<AnchorV::Shared>

Provide the shared anchor for this transaction, if present.

The shared anchor is only present if:

  • there is at least one spend, and
  • this is a V5 transaction.
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pub fn nullifiers(&self) -> impl Iterator<Item = &Nullifier>

Collect the Nullifiers for this transaction, if it contains Spends.

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pub fn note_commitments(&self) -> impl Iterator<Item = &Fq>

Collect the cm_u’s for this transaction, if it contains Outputs, in the order they appear in the transaction.

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pub fn binding_verification_key(&self) -> VerificationKeyBytes<Binding>

Calculate the Spend/Output binding verification key.

Getting the binding signature validating key from the Spend and Output description value commitments and the balancing value implicitly checks that the balancing value is consistent with the value transferred in the Spend and Output descriptions but also proves that the signer knew the randomness used for the Spend and Output value commitments, which prevents replays of Output descriptions.

The net value of Spend transfers minus Output transfers in a transaction is called the balancing value, measured in zatoshi as a signed integer v_balance.

Consistency of v_balance with the value commitments in Spend descriptions and Output descriptions is enforced by the binding signature.

Instead of generating a key pair at random, we generate it as a function of the value commitments in the Spend descriptions and Output descriptions of the transaction, and the balancing value.

https://zips.z.cash/protocol/protocol.pdf#saplingbalance

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pub fn value_balance(&self) -> Amount<NegativeAllowed>

Provide access to the value_balance field of the shielded data.

Needed to calculate the sapling value balance.

Trait Implementations§

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impl<AnchorV> Arbitrary for ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone + Debug + 'static, TransferData<AnchorV>: Arbitrary,

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type Parameters = ()

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.
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fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args. Read more
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type Strategy = BoxedStrategy<ShieldedData<AnchorV>>

The type of Strategy used to generate values of type Self.
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fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). Read more
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impl<AnchorV> Clone for ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone + Clone,

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fn clone(&self) -> ShieldedData<AnchorV>

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<AnchorV> Debug for ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone + Debug,

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'de, AnchorV> Deserialize<'de> for ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone + Deserialize<'de>,

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl<AnchorV> Display for ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone,

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<AnchorV> PartialEq for ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone + PartialEq,

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fn eq(&self, other: &ShieldedData<AnchorV>) -> bool

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<AnchorV> Serialize for ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone + Serialize,

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl ZcashSerialize for ShieldedData<SharedAnchor>

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fn zcash_serialize<W: Write>(&self, writer: W) -> Result<(), Error>

Write self to the given writer using the canonical format. Read more
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fn zcash_serialize_to_vec(&self) -> Result<Vec<u8>, Error>

Helper function to construct a vec to serialize the current struct into
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fn zcash_serialized_size(&self) -> usize

Get the size of self by using a fake writer.
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impl<AnchorV> Eq for ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone + Eq,

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impl<AnchorV> StructuralPartialEq for ShieldedData<AnchorV>
where AnchorV: AnchorVariant + Clone,

Auto Trait Implementations§

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impl<AnchorV> RefUnwindSafe for ShieldedData<AnchorV>

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impl<AnchorV> Send for ShieldedData<AnchorV>
where <AnchorV as AnchorVariant>::PerSpend: Send, <AnchorV as AnchorVariant>::Shared: Send,

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impl<AnchorV> Sync for ShieldedData<AnchorV>
where <AnchorV as AnchorVariant>::PerSpend: Sync, <AnchorV as AnchorVariant>::Shared: Sync,

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impl<AnchorV> Unpin for ShieldedData<AnchorV>
where <AnchorV as AnchorVariant>::PerSpend: Unpin, <AnchorV as AnchorVariant>::Shared: Unpin,

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impl<AnchorV> UnwindSafe for ShieldedData<AnchorV>
where <AnchorV as AnchorVariant>::PerSpend: UnwindSafe, <AnchorV as AnchorVariant>::Shared: UnwindSafe,

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Change the foreground color to black
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Change the background color to black
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Change the background color to red
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Change the background color to green
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Change the foreground color to yellow
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Change the background color to yellow
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Change the foreground color to blue
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Change the background color to blue
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Change the foreground color to magenta
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Change the background color to magenta
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Change the foreground color to purple
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Change the background color to purple
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Change the foreground color to cyan
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Change the background color to cyan
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Change the foreground color to white
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Change the background color to white
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Change the foreground color to the terminal default
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Change the background color to the terminal default
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Change the foreground color to bright green
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Change the background color to bright green
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Change the foreground color to bright yellow
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Change the background color to bright yellow
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Change the foreground color to bright blue
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Change the background color to bright blue
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Change the foreground color to bright magenta
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Change the background color to bright magenta
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Change the foreground color to bright purple
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Change the background color to bright purple
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Change the foreground color to bright cyan
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Change the background color to bright cyan
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Change the foreground color to bright white
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Change the background color to bright white
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Make the text bold
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Make the text dim
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Make the text italicized
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Swap the foreground and background colors
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Hide the text
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Cross out the text
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Set the background color to a specific RGB value.
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Sets the foreground color to an RGB value.
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Sets the background color to an RGB value.
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Apply a runtime-determined style
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Set the foreground color generically Read more
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Set the background color generically. Read more
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Change the foreground color to black
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Change the background color to black
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Change the foreground color to red
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Change the background color to red
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Change the foreground color to green
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Change the background color to green
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Change the foreground color to yellow
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Change the background color to yellow
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Change the foreground color to blue
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Change the background color to blue
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Change the foreground color to magenta
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Change the background color to magenta
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Change the foreground color to purple
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Change the background color to purple
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Change the foreground color to cyan
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Change the background color to cyan
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Change the foreground color to white
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Change the background color to white
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Change the foreground color to the terminal default
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Change the background color to the terminal default
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Change the foreground color to bright black
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Change the background color to bright black
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Change the foreground color to bright red
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Change the background color to bright red
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Change the foreground color to bright green
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Change the background color to bright green
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fn bright_yellow(&self) -> FgColorDisplay<'_, BrightYellow, Self>

Change the foreground color to bright yellow
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Change the background color to bright yellow
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fn bright_blue(&self) -> FgColorDisplay<'_, BrightBlue, Self>

Change the foreground color to bright blue
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fn on_bright_blue(&self) -> BgColorDisplay<'_, BrightBlue, Self>

Change the background color to bright blue
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fn bright_magenta(&self) -> FgColorDisplay<'_, BrightMagenta, Self>

Change the foreground color to bright magenta
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fn on_bright_magenta(&self) -> BgColorDisplay<'_, BrightMagenta, Self>

Change the background color to bright magenta
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fn bright_purple(&self) -> FgColorDisplay<'_, BrightMagenta, Self>

Change the foreground color to bright purple
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Change the background color to bright purple
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fn bright_cyan(&self) -> FgColorDisplay<'_, BrightCyan, Self>

Change the foreground color to bright cyan
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Change the background color to bright cyan
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fn bright_white(&self) -> FgColorDisplay<'_, BrightWhite, Self>

Change the foreground color to bright white
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fn on_bright_white(&self) -> BgColorDisplay<'_, BrightWhite, Self>

Change the background color to bright white
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fn bold(&self) -> BoldDisplay<'_, Self>

Make the text bold
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fn dimmed(&self) -> DimDisplay<'_, Self>

Make the text dim
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fn italic(&self) -> ItalicDisplay<'_, Self>

Make the text italicized
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fn underline(&self) -> UnderlineDisplay<'_, Self>

Make the text italicized
Make the text blink
Make the text blink (but fast!)
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fn reversed(&self) -> ReversedDisplay<'_, Self>

Swap the foreground and background colors
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fn hidden(&self) -> HiddenDisplay<'_, Self>

Hide the text
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fn strikethrough(&self) -> StrikeThroughDisplay<'_, Self>

Cross out the text
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fn color<Color>(&self, color: Color) -> FgDynColorDisplay<'_, Color, Self>
where Color: DynColor,

Set the foreground color at runtime. Only use if you do not know which color will be used at compile-time. If the color is constant, use either OwoColorize::fg or a color-specific method, such as OwoColorize::green, Read more
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fn on_color<Color>(&self, color: Color) -> BgDynColorDisplay<'_, Color, Self>
where Color: DynColor,

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fn fg_rgb<const R: u8, const G: u8, const B: u8>( &self ) -> FgColorDisplay<'_, CustomColor<R, G, B>, Self>

Set the foreground color to a specific RGB value.
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fn bg_rgb<const R: u8, const G: u8, const B: u8>( &self ) -> BgColorDisplay<'_, CustomColor<R, G, B>, Self>

Set the background color to a specific RGB value.
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fn truecolor(&self, r: u8, g: u8, b: u8) -> FgDynColorDisplay<'_, Rgb, Self>

Sets the foreground color to an RGB value.
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fn on_truecolor(&self, r: u8, g: u8, b: u8) -> BgDynColorDisplay<'_, Rgb, Self>

Sets the background color to an RGB value.
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fn style(&self, style: Style) -> Styled<&Self>

Apply a runtime-determined style
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fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R
where R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more
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fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R
where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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fn pipe_borrow_mut<'a, B, R>( &'a mut self, func: impl FnOnce(&'a mut B) -> R ) -> R
where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R
where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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fn pipe_deref_mut<'a, T, R>( &'a mut self, func: impl FnOnce(&'a mut T) -> R ) -> R
where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<Response, Error> ResponseResult<Response, Error> for Response

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fn into_result(self) -> Result<Response, Error>

Converts the type into a Result that can be sent as a response.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> SectionExt for T
where T: Display + Send + Sync + 'static,

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fn header<C>(self, header: C) -> IndentedSection<C, T>
where C: Display + Send + Sync + 'static,

Add a header to a Section and indent the body Read more
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impl<T> Tap for T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,