# Struct rustc_expand::proc_macro_server::Rustc

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    pub(crate) struct Rustc<'a, 'b> {
        ecx: &'a mut ExtCtxt<'b>,
        def_site: Span,
        call_site: Span,
        mixed_site: Span,
        krate: CrateNum,
        rebased_spans: FxHashMap<usize, Span>,
    }

## Fields§

§`ecx: &'a mut ExtCtxt<'b>`§`def_site: Span`§`call_site: Span`§`mixed_site: Span`§`krate: CrateNum`§`rebased_spans: FxHashMap<usize, Span>`

## Implementations§

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### impl<'a, 'b> Rustc<'a, 'b>

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#### pub fn new(ecx: &'a mut ExtCtxt<'b>) -> Self

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#### fn psess(&self) -> &ParseSess

## Trait Implementations§

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### impl FreeFunctions for Rustc<'_, '_>

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#### fn injected_env_var(&mut self, var: &str) -> Option<String>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn track_env_var(&mut self, var: &str, value: Option<&str>)

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn track_path(&mut self, path: &str)

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn literal_from_str( &mut self, s: &str ) -> Result<Literal<Self::Span, Self::Symbol>, ()>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn emit_diagnostic(&mut self, diagnostic: Diagnostic<Self::Span>)

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn drop(&mut self, self_: Self::FreeFunctions)

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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### impl Server for Rustc<'_, '_>

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#### fn globals(&mut self) -> ExpnGlobals<Self::Span>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn intern_symbol(string: &str) -> Self::Symbol

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
Intern a symbol received from RPC
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#### fn with_symbol_string(symbol: &Self::Symbol, f: impl FnOnce(&str))

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
Recover the string value of a symbol, and invoke a callback with it.
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### impl SourceFile for Rustc<'_, '_>

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#### fn eq(&mut self, file1: &Self::SourceFile, file2: &Self::SourceFile) -> bool

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn path(&mut self, file: &Self::SourceFile) -> String

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn is_real(&mut self, file: &Self::SourceFile) -> bool

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn drop(&mut self, self_: Self::SourceFile)

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn clone(&mut self, self_: &Self::SourceFile) -> Self::SourceFile

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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### impl Span for Rustc<'_, '_>

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#### fn save_span(&mut self, span: Self::Span) -> usize

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

Saves the provided span into the metadata of the crate we are currently compiling, which must be a proc-macro crate. This id can be passed to `recover_proc_macro_span` when our current crate is run as a proc-macro.

Let’s suppose that we have two crates - `my_client` and `my_proc_macro`. The `my_proc_macro` crate contains a procedural macro `my_macro`, which is implemented as: `quote! { "hello" }`

When we compile `my_proc_macro`, we will execute the `quote` proc-macro. This will save the span of “hello” into the metadata of `my_proc_macro`. As a result, the body of `my_proc_macro` (after expansion) will end up containing a call that looks like this: `proc_macro::Ident::new("hello", proc_macro::Span::recover_proc_macro_span(0))`

where `0` is the id returned by this function. When `my_proc_macro` executes (during the compilation of `my_client`), the call to `recover_proc_macro_span` will load the corresponding span from the metadata of `my_proc_macro` (which we have access to, since we’ve loaded `my_proc_macro` from disk in order to execute it). In this way, we have obtained a span pointing into `my_proc_macro`

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#### fn debug(&mut self, span: Self::Span) -> String

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn source_file(&mut self, span: Self::Span) -> Self::SourceFile

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn parent(&mut self, span: Self::Span) -> Option<Self::Span>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn source(&mut self, span: Self::Span) -> Self::Span

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn byte_range(&mut self, span: Self::Span) -> Range<usize>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn start(&mut self, span: Self::Span) -> Self::Span

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn end(&mut self, span: Self::Span) -> Self::Span

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn line(&mut self, span: Self::Span) -> usize

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn column(&mut self, span: Self::Span) -> usize

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn join(&mut self, first: Self::Span, second: Self::Span) -> Option<Self::Span>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn subspan( &mut self, span: Self::Span, start: Bound<usize>, end: Bound<usize> ) -> Option<Self::Span>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn resolved_at(&mut self, span: Self::Span, at: Self::Span) -> Self::Span

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn source_text(&mut self, span: Self::Span) -> Option<String>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn recover_proc_macro_span(&mut self, id: usize) -> Self::Span

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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### impl Symbol for Rustc<'_, '_>

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#### fn normalize_and_validate_ident( &mut self, string: &str ) -> Result<Self::Symbol, ()>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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### impl TokenStream for Rustc<'_, '_>

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#### fn is_empty(&mut self, stream: &Self::TokenStream) -> bool

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn from_str(&mut self, src: &str) -> Self::TokenStream

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn to_string(&mut self, stream: &Self::TokenStream) -> String

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn expand_expr( &mut self, stream: &Self::TokenStream ) -> Result<Self::TokenStream, ()>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn from_token_tree( &mut self, tree: TokenTree<Self::TokenStream, Self::Span, Self::Symbol> ) -> Self::TokenStream

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn concat_trees( &mut self, base: Option<Self::TokenStream>, trees: Vec<TokenTree<Self::TokenStream, Self::Span, Self::Symbol>> ) -> Self::TokenStream

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn concat_streams( &mut self, base: Option<Self::TokenStream>, streams: Vec<Self::TokenStream> ) -> Self::TokenStream

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn into_trees( &mut self, stream: Self::TokenStream ) -> Vec<TokenTree<Self::TokenStream, Self::Span, Self::Symbol>>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn drop(&mut self, self_: Self::TokenStream)

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### fn clone(&mut self, self_: &Self::TokenStream) -> Self::TokenStream

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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### impl Types for Rustc<'_, '_>

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#### type FreeFunctions = FreeFunctions

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### type TokenStream = TokenStream

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### type SourceFile = Arc<SourceFile>

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### type Span = Span

🔬This is a nightly-only experimental API. (`proc_macro_internals`)
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#### type Symbol = Symbol

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

## Auto Trait Implementations§

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### impl<'a, 'b> !DynSend for Rustc<'a, 'b>

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### impl<'a, 'b> !DynSync for Rustc<'a, 'b>

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### impl<'a, 'b> Freeze for Rustc<'a, 'b>

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### impl<'a, 'b> !RefUnwindSafe for Rustc<'a, 'b>

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### impl<'a, 'b> !Send for Rustc<'a, 'b>

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### impl<'a, 'b> !Sync for Rustc<'a, 'b>

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### impl<'a, 'b> Unpin for Rustc<'a, 'b>

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### impl<'a, 'b> !UnwindSafe for Rustc<'a, 'b>

## Blanket Implementations§

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### impl<T> Aligned for T

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#### const ALIGN: Alignment = _

Alignment of `Self`.
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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, R> CollectAndApply<T, R> for T

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#### fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to `f(&iter.collect::<Vec<_>>())`.

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#### type Output = R

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### impl<T> Filterable for T

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#### fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. 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> Pointable for T

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#### const ALIGN: usize = _

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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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<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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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
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### impl<'a, T> Captures<'a> for T
where T: ?Sized,

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### impl<T> ErasedDestructor for T
where T: 'static,

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 72 bytes