1.29.0[][src]Struct proc_macro::Group

pub struct Group(_);

A delimited token stream.

A Group internally contains a TokenStream which is surrounded by Delimiters.

Methods

impl Group
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Creates a new Group with the given delimiter and token stream.

This constructor will set the span for this group to Span::call_site(). To change the span you can use the set_span method below.

Returns the delimiter of this Group

Returns the TokenStream of tokens that are delimited in this Group.

Note that the returned token stream does not include the delimiter returned above.

Returns the span for the delimiters of this token stream, spanning the entire Group.

pub fn span(&self) -> Span {
           ^^^^^^^

🔬 This is a nightly-only experimental API. (proc_macro_span #54725)

Returns the span pointing to the opening delimiter of this group.

pub fn span_open(&self) -> Span {
                ^

🔬 This is a nightly-only experimental API. (proc_macro_span #54725)

Returns the span pointing to the closing delimiter of this group.

pub fn span_close(&self) -> Span {
                       ^

Configures the span for this Group's delimiters, but not its internal tokens.

This method will not set the span of all the internal tokens spanned by this group, but rather it will only set the span of the delimiter tokens at the level of the Group.

Trait Implementations

impl ToString for Group
1.15.0
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impl Clone for Group
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Performs copy-assignment from source. Read more

impl From<Group> for TokenTree
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impl !Send for Group
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impl !Sync for Group
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impl Display for Group
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Prints the group as a string that should be losslessly convertible back into the same group (modulo spans), except for possibly TokenTree::Groups with Delimiter::None delimiters.

impl Debug for Group
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Blanket Implementations

impl<T> ToOwned for T where
    T: Clone
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impl<T> ToString for T where
    T: Display + ?Sized
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impl<T> From for T
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impl<T, U> Into for T where
    U: From<T>, 
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impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

impl<T> Borrow for T where
    T: ?Sized
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impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

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