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ExprBuilder

meta_language::grammar

Struct ExprBuilder

pub struct ExprBuilder;

Expand description

Ergonomic constructor for grammar expressions.

Implementations§

impl ExprBuilder

pub const fn empty(self) -> GrammarExpr

Builds an empty-string expression.

pub fn term(self, value: impl Into<String>) -> GrammarExpr

Builds a literal terminal.

pub fn terminal(self, value: impl Into<String>) -> GrammarExpr

Builds a literal terminal.

pub fn terminal_insensitive(self, value: impl Into<String>) -> GrammarExpr

Builds a case-insensitive literal terminal.

pub const fn char(self, value: char) -> GrammarExpr

Builds a single-character range expression.

pub const fn char_range(self, start: char, end: char) -> GrammarExpr

Builds an inclusive character range expression.

pub fn char_class<I>(self, negated: bool, items: I) -> GrammarExpr
where I: IntoIterator<Item = CharClassItem>,

Builds a character class.

pub const fn any(self) -> GrammarExpr

Builds an any-character wildcard.

pub fn nt(self, value: impl Into<String>) -> GrammarExpr

Builds a non-terminal reference.

pub fn non_terminal(self, value: impl Into<String>) -> GrammarExpr

Builds a non-terminal reference.

pub fn choice<I>(self, ordered: bool, alternatives: I) -> GrammarExpr
where I: IntoIterator<Item = GrammarExpr>,

Builds a choice expression.

pub fn choice_ordered<I>(self, alternatives: I) -> GrammarExpr
where I: IntoIterator<Item = GrammarExpr>,

Builds an ordered choice expression.

pub fn choice_unordered<I>(self, alternatives: I) -> GrammarExpr
where I: IntoIterator<Item = GrammarExpr>,

Builds an unordered choice expression.

pub fn seq<I>(self, items: I) -> GrammarExpr
where I: IntoIterator<Item = GrammarExpr>,

Builds a sequence expression.

pub fn opt(self, expr: GrammarExpr) -> GrammarExpr

Builds an optional expression.

pub fn rep0(self, expr: GrammarExpr) -> GrammarExpr

Builds a zero-or-more repetition expression.

pub fn rep1(self, expr: GrammarExpr) -> GrammarExpr

Builds a one-or-more repetition expression.

pub fn repeat( self, expr: GrammarExpr, min: usize, max: Option<usize>, ) -> GrammarExpr

Builds a counted repetition expression.

pub fn and(self, expr: GrammarExpr) -> GrammarExpr

Builds a positive lookahead expression.

pub fn not(self, expr: GrammarExpr) -> GrammarExpr

Builds a negative lookahead expression.

pub fn capture( self, label: Option<impl Into<String>>, expr: GrammarExpr, ) -> GrammarExpr

Builds a labelled capture expression.

pub fn capture_unlabeled(self, expr: GrammarExpr) -> GrammarExpr

Builds an anonymous capture expression.

Trait Implementations§

impl Clone for ExprBuilder

fn clone(&self) -> ExprBuilder

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl Debug for ExprBuilder

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

Formats the value using the given formatter. Read more

impl Default for ExprBuilder

fn default() -> ExprBuilder

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

impl PartialEq for ExprBuilder

fn eq(&self, other: &ExprBuilder) -> bool

Tests for self and other values to be equal, and is used by ==.

1.0.0 (const: unstable) · Source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ExprBuilder

impl Eq for ExprBuilder

impl StructuralPartialEq for ExprBuilder

Auto Trait Implementations§

impl Freeze for ExprBuilder

impl RefUnwindSafe for ExprBuilder

impl Send for ExprBuilder

impl Sync for ExprBuilder

impl Unpin for ExprBuilder

impl UnsafeUnpin for ExprBuilder

impl UnwindSafe for ExprBuilder

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> ArchivePointee for T

type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.

fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

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

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

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> IntoEither for T

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

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

impl<T> LayoutRaw for T

fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>

Returns the layout of the type.

impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
where T: SharedNiching<N1, N2>, N1: Niching<T>, N2: Niching<T>,

unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool

Returns whether the given value has been niched. Read more

fn resolve_niched(out: Place<NichedOption<T, N1>>)

Writes data to out indicating that a T is niched.

impl<T> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T> Pointee for T

type Metadata = ()

The metadata type for pointers and references to this type.

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.

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.

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<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,