Struct GrammarDeclarations

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pub struct GrammarDeclarations {
    pub matching: Option<String>,
    pub settling: Option<Vec<String>>,
    pub imports: Vec<String>,
    pub modes: Vec<String>,
    pub extras: Vec<GrammarExpr>,
    pub conflicts: Vec<Vec<String>>,
    pub precedences: Vec<Vec<PrecedenceEntry>>,
    pub macros: Vec<GrammarMacro>,
    pub scanners: Vec<GrammarScanner>,
}

Expand description

The grammar-level declarations of the feature union.

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§matching: Option<String>

generalized, peg or longest, when given.

§settling: Option<Vec<String>>

The settling steps (see SETTLING_STEPS), when given.

§imports: Vec<String>

Names of grammars this one inherits from.

§modes: Vec<String>

The lexer modes beyond default.

§extras: Vec<GrammarExpr>

Trivia expressions allowed between any two tokens.

§conflicts: Vec<Vec<String>>

Groups of rule names whose ambiguity is expected.

§precedences: Vec<Vec<PrecedenceEntry>>

Orders of named precedences and rules, the earlier entry higher.

§macros: Vec<GrammarMacro>

Macro declarations.

§scanners: Vec<GrammarScanner>

External scanner declarations.

Implementations§

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impl GrammarDeclarations

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pub fn is_empty(&self) -> bool

Whether no declaration is given.

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pub fn external_tokens(&self) -> Vec<&str>

The token names the external scanners produce.

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pub fn present(&self) -> Vec<&'static str>

The names of the declaration kinds that are given, in listing order.

Trait Implementations§

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impl Clone for GrammarDeclarations

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fn clone(&self) -> GrammarDeclarations

Returns a duplicate of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for GrammarDeclarations

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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 Default for GrammarDeclarations

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fn default() -> GrammarDeclarations

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

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impl Eq for GrammarDeclarations

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impl PartialEq for GrammarDeclarations

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

Equality operator ==. Read more

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

Inequality operator !=. Read more

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impl StructuralPartialEq for GrammarDeclarations

Auto Trait Implementations§

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impl UnwindSafe for GrammarDeclarations

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> ArchivePointee for T

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type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.

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

Converts some archived metadata to the pointer metadata for itself.

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

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

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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

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

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

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

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

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

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

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

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

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

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> IntoEither for T

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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

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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

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