pub enum TopEntryPoint {
    SourceFile,
    MacroStmts,
    MacroItems,
    Pattern,
    Type,
    Expr,
    MetaItem,
    MacroEagerInput,
}
Expand description

Parse the whole of the input as a given syntactic construct.

This covers two main use-cases:

  • Parsing a Rust file.
  • Parsing a result of macro expansion.

That is, for something like

quick_check! {
   fn prop() {}
}

the input to the macro will be parsed with PrefixEntryPoint::Item, and the result will be TopEntryPoint::MacroItems.

TopEntryPoint::parse makes a guarantee that

  • all input is consumed
  • the result is a valid tree (there’s one root node)

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SourceFile

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MacroStmts

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MacroItems

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Pattern

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Type

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Expr

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MetaItem

Edge case – macros generally don’t expand to attributes, with the exception of cfg_attr which does!

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MacroEagerInput

Edge case 2 – eager macros expand their input to a delimited list of comma separated expressions

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impl TopEntryPoint

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pub fn parse(&self, input: &Input) -> Output

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impl Debug for TopEntryPoint

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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<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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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, 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.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more