NonEmptyTokenStream

facet_macros_parse

Struct NonEmptyTokenStream 

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pub struct NonEmptyTokenStream(pub TokenStream);
Expand description

Since parsing a TokenStream succeeds even when no tokens are left, this type is used to parse a TokenStream that is not empty.

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§0: TokenStream

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impl Parser for NonEmptyTokenStream

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fn parser(tokens: &mut TokenIter) -> Result<NonEmptyTokenStream, Error>

The actual parsing function that must be implemented. This mutates the tokens iterator directly. It should not be called from user code except for implementing parsers itself and then only when the rules below are followed. Read more
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impl ToTokens for NonEmptyTokenStream

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fn to_tokens(&self, tokens: &mut TokenStream)

Write &self to the given TokenStream. Read more
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fn to_token_iter(&self) -> TokenIter ⓘ

Convert &self into a TokenIter object.
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fn into_token_iter(self) -> TokenIter ⓘ
where Self: Sized,

Convert self into a TokenIter object.
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fn to_token_stream(&self) -> TokenStream

Convert &self into a TokenStream object.
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fn into_token_stream(self) -> TokenStream
where Self: Sized,

Convert self into a TokenStream object.
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fn tokens_to_string(&self) -> String

Convert &self into a String object. This is mostly used in the test suite to compare the outputs. When the input is a &str then this parses it and returns a normalized String.
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impl TryFrom<TokenStream> for NonEmptyTokenStream

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(value: TokenStream) -> Result<NonEmptyTokenStream, Error>

Performs the conversion.

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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> 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> 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<U> 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> Parse for T
where T: Parser,

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fn parse(tokens: &mut TokenIter) -> Result<Self, Error>

This is the user facing API to parse grammatical entities. Calls a parser() within a transaction. Commits changes on success and returns the parsed value. Read more
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fn parse_all(tokens: &mut TokenIter) -> Result<Self, Error>

Exhaustive parsing within a transaction. This is a convenience method that implies a EndOfStream at the end. Thus it will error if parsing is not exhaustive. Read more
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fn parse_with<T>( tokens: &mut TokenIter, f: impl FnOnce(Self, &mut TokenIter) -> Result<T, Error>, ) -> Result<T, Error>

Parse a value in a transaction, pass it to a FnOnce(Self, &mut TokenIter) -> Result<T> closure which creates a new result or returns an Error. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.