Struct teleparse::syntax::first::First

source · 
pub struct First<L: Lexicon> { /* private fields */ }
Expand description

The FIRST function for a grammar.

See module-level documentation for more information.

§Implementation note

This type is immutable by-design. The FIRST function is built using a FirstBuilder by traversing the AST. Once built, it should not be mutated when parsing.

Implementations§

source§

impl<L: Lexicon> First<L>

source

pub fn new(map: BTreeMap<TypeId, FirstSet<L>>) -> Self

Create a FIRST function backed by the table

source

pub fn get(&self, ty: &TypeId) -> &FirstSet<L>

Get the FIRST set for a type

Trait Implementations§

source§

impl<L: Debug + Lexicon> Debug for First<L>

source§

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

Formats the value using the given formatter. Read more
source§

impl<L: Default + Lexicon> Default for First<L>

source§

fn default() -> First<L>

Returns the “default value” for a type. Read more

Auto Trait Implementations§

§

impl<L> Freeze for First<L>
where <L as Lexicon>::Map<LitSet>: Freeze,

§

impl<L> RefUnwindSafe for First<L>
where <L as Lexicon>::Map<LitSet>: RefUnwindSafe,

§

impl<L> Send for First<L>
where <L as Lexicon>::Map<LitSet>: Send,

§

impl<L> Sync for First<L>
where <L as Lexicon>::Map<LitSet>: Sync,

§

impl<L> Unpin for First<L>
where <L as Lexicon>::Map<LitSet>: Unpin,

§

impl<L> UnwindSafe for First<L>
where <L as Lexicon>::Map<LitSet>: UnwindSafe + RefUnwindSafe,

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

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

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

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

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

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.

source§

impl<T> IntoEither for T

source§

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
source§

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
source§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

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.
source§

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

Performs the conversion.