Struct proc_macro2::Group
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pub struct Group { /* fields omitted */ }
A delimited token stream.
A Group
internally contains a TokenStream
which is surrounded by
Delimiter
s.
Methods
impl Group
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pub fn new(delimiter: Delimiter, stream: TokenStream) -> 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.
pub fn delimiter(&self) -> Delimiter
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Returns the delimiter of this Group
pub fn stream(&self) -> TokenStream
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Returns the TokenStream
of tokens that are delimited in this Group
.
Note that the returned token stream does not include the delimiter returned above.
pub fn span(&self) -> Span
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Returns the span for the delimiters of this token stream, spanning the
entire Group
.
pub fn set_span(&mut self, span: Span)
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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 From<Group> for TokenTree
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impl Clone for Group
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fn clone(&self) -> Group
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
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::Group
s
with Delimiter::None
delimiters.
fn fmt(&self, f: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more