Struct trust_dns_proto::serialize::binary::Restrict

source · [−]

pub struct Restrict<T>(_);

Expand description

Untrusted types will be wrapped in this type.

To gain access to the data, some form of verification through one of the public methods is necessary.

Implementations

impl<T> Restrict<T>

pub fn new(restricted: T) -> Self

Create a new restricted type

pub fn verify<'a, F: Fn(&'a T) -> bool>(&'a self, f: F) -> Verified<'a, T>

It is the responsibility of this function to verify the contained type is valid.

use trust_dns_proto::serialize::binary::Restrict;

let unrestricted = Restrict::new(0).verify(|r| *r == 0).then(|r| *r + 1).unwrap();
assert!(unrestricted == 1);

Returns

If f returns true then the value is valid and a chainable Verified type is returned

pub fn verify_unwrap<F: Fn(&T) -> bool>(self, f: F) -> Result<T, T>

It is the responsibility of this function to verify the contained type is valid.

use trust_dns_proto::serialize::binary::Restrict;

let unrestricted = Restrict::new(0).verify_unwrap(|r| *r == 0).unwrap();
assert!(unrestricted == 0);

Returns

If f returns true then the value is valid and Ok(T) is returned. Otherwise Err(T) is returned.

pub fn unverified(self) -> T

Unwraps the value without verifying the data, akin to Result::unwrap and Option::unwrap, but will not panic

pub fn map<R, F: Fn(T) -> R>(self, f: F) -> Restrict<R>

Map the internal type of the restriction

use trust_dns_proto::serialize::binary::Restrict;

let restricted = Restrict::new(0).map(|b| vec![b, 1]);
assert!(restricted.verify(|v| v == &[0, 1]).is_valid());
assert!(!restricted.verify(|v| v == &[1, 0]).is_valid());

Trait Implementations

impl<T: Clone> Clone for Restrict<T>

fn clone(&self) -> Restrict<T>

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

impl RestrictedMath for Restrict<u16>

type Arg = u16

Argument for the math operations

type Value = u16

Return value, generally the same as Arg

fn checked_add(&self, arg: Self::Arg) -> Result<Restrict<Self::Value>, Self::Arg>

Checked addition, see usize::checked_add

fn checked_sub(&self, arg: Self::Arg) -> Result<Restrict<Self::Value>, Self::Arg>

Checked subtraction, see usize::checked_sub

fn checked_mul(&self, arg: Self::Arg) -> Result<Restrict<Self::Value>, Self::Arg>

Checked multiplication, see usize::checked_mul

impl RestrictedMath for Restrict<u8>

type Arg = u8

Argument for the math operations

type Value = u8

Return value, generally the same as Arg

fn checked_add(&self, arg: Self::Arg) -> Result<Restrict<Self::Value>, Self::Arg>

Checked addition, see usize::checked_add

fn checked_sub(&self, arg: Self::Arg) -> Result<Restrict<Self::Value>, Self::Arg>

Checked subtraction, see usize::checked_sub

fn checked_mul(&self, arg: Self::Arg) -> Result<Restrict<Self::Value>, Self::Arg>

Checked multiplication, see usize::checked_mul

impl RestrictedMath for Restrict<usize>

type Arg = usize

Argument for the math operations

type Value = usize

Return value, generally the same as Arg

fn checked_add(&self, arg: Self::Arg) -> Result<Restrict<Self::Value>, Self::Arg>

Checked addition, see usize::checked_add

fn checked_sub(&self, arg: Self::Arg) -> Result<Restrict<Self::Value>, Self::Arg>

Checked subtraction, see usize::checked_sub

fn checked_mul(&self, arg: Self::Arg) -> Result<Restrict<Self::Value>, Self::Arg>

Checked multiplication, see usize::checked_mul

impl<T: Copy> Copy for Restrict<T>

Auto Trait Implementations

impl<T> RefUnwindSafe for Restrict<T> where
T: RefUnwindSafe,

impl<T> Send for Restrict<T> where
T: Send,

impl<T> Sync for Restrict<T> where
T: Sync,

impl<T> Unpin for Restrict<T> where
T: Unpin,

impl<T> UnwindSafe for Restrict<T> where
T: UnwindSafe,

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

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

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

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

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more