Trait selinux::policy::parser::ParseStrategy

pub trait ParseStrategy: Debug + PartialEq + Sized {
    type Input;
    type Output<T: Debug + FromBytes + KnownLayout + Immutable + PartialEq + Unaligned>: Debug + PartialEq;
    type Slice<T: Debug + FromBytes + Immutable + PartialEq + Unaligned>: Debug + PartialEq;

    // Required methods
    fn parse<T: Clone + Debug + FromBytes + KnownLayout + Immutable + PartialEq + Unaligned>(
        self,
    ) -> Option<(Self::Output<T>, Self)>;
    fn parse_slice<T: Clone + Debug + FromBytes + Immutable + PartialEq + Unaligned>(
        self,
        count: usize,
    ) -> Option<(Self::Slice<T>, Self)>;
    fn deref<'a, T: Debug + FromBytes + KnownLayout + Immutable + PartialEq + Unaligned>(
        output: &'a Self::Output<T>,
    ) -> &'a T;
    fn deref_slice<'a, T: Debug + FromBytes + Immutable + PartialEq + Unaligned>(
        slice: &'a Self::Slice<T>,
    ) -> &'a [T];
    fn len(&self) -> usize;
    fn into_inner(self) -> Self::Input;
}

A strategy for parsing data. Parsed structures that may contain references to parsed data are generally of the form:

type ParserOutput<PS: ParseStrategy> {
    ref_or_value_t: PS::Output<T>,
    // ...
}

The above pattern allows ParseStrategy implementations to dictate how values are stored (by copied value, or reference to parser input data).

Required Associated Types

type Input

Type of input supported by this ParseStrategy.

type Output<T: Debug + FromBytes + KnownLayout + Immutable + PartialEq + Unaligned>: Debug + PartialEq

Type of successfully parsed output from Self::parse().

type Slice<T: Debug + FromBytes + Immutable + PartialEq + Unaligned>: Debug + PartialEq

Type of successfully parsed output from Self::parse_slice().

Required Methods

fn parse<T: Clone + Debug + FromBytes + KnownLayout + Immutable + PartialEq + Unaligned>( self, ) -> Option<(Self::Output<T>, Self)>

Parses a Self::Output<T> from the next bytes underlying self. If the parse succeeds, then return (Some(output), self) after advancing past the parsed bytes. Otherwise, return None without advancing past the parsed bytes.

fn parse_slice<T: Clone + Debug + FromBytes + Immutable + PartialEq + Unaligned>( self, count: usize, ) -> Option<(Self::Slice<T>, Self)>

Parses a Self::Slice<T> of count elements from the next bytes underlying self. If the parse succeeds, then return (Some(slice), self) after advancing past the parsed bytes. Otherwise, return None without advancing past the parsed bytes.

fn deref<'a, T: Debug + FromBytes + KnownLayout + Immutable + PartialEq + Unaligned>( output: &'a Self::Output<T>, ) -> &'a T

Dereferences borrow of Self::Output<T> as borrow of T.

fn deref_slice<'a, T: Debug + FromBytes + Immutable + PartialEq + Unaligned>( slice: &'a Self::Slice<T>, ) -> &'a [T]

Dereferences borrow of Self::Slice<T> as borrow of [T].

fn len(&self) -> usize

Returns the number of bytes remaining to be parsed by this ParseStrategy.

fn into_inner(self) -> Self::Input

Returns the complete parse input being consumed by this strategy.

Object Safety

This trait is not object safe.

Implementors

impl<B: Debug + SplitByteSlice + PartialEq> ParseStrategy for ByRef<B>

type Input = B

type Output<T: Debug + FromBytes + KnownLayout + Immutable + PartialEq + Unaligned> = Ref<B, T>

type Slice<T: Debug + FromBytes + Immutable + PartialEq + Unaligned> = Ref<B, [T]>

impl<T: AsRef<[u8]> + Debug + PartialEq> ParseStrategy for ByValue<T>

where Cursor<T>: Debug + ParseCursor + PartialEq,

type Input = T

type Output<O: Debug + FromBytes + KnownLayout + Immutable + PartialEq + Unaligned> = O

type Slice<S: Debug + FromBytes + Immutable + PartialEq + Unaligned> = Vec<S>