Struct proc_macro::Group
1.29.0 · source · pub struct Group(/* private fields */);
Expand description
A delimited token stream.
A Group
internally contains a TokenStream
which is surrounded by Delimiter
s.
Implementations§
source§impl Group
impl Group
1.29.0 · sourcepub fn new(delimiter: Delimiter, stream: TokenStream) -> Group
pub fn new(delimiter: Delimiter, stream: TokenStream) -> Group
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.
1.29.0 · sourcepub fn stream(&self) -> TokenStream
pub fn stream(&self) -> TokenStream
Returns the TokenStream
of tokens that are delimited in this Group
.
Note that the returned token stream does not include the delimiter returned above.
1.29.0 · sourcepub fn span(&self) -> Span
pub fn span(&self) -> Span
Returns the span for the delimiters of this token stream, spanning the
entire Group
.
pub fn span(&self) -> Span {
^^^^^^^
1.55.0 · sourcepub fn span_open(&self) -> Span
pub fn span_open(&self) -> Span
Returns the span pointing to the opening delimiter of this group.
pub fn span_open(&self) -> Span {
^
1.55.0 · sourcepub fn span_close(&self) -> Span
pub fn span_close(&self) -> Span
Returns the span pointing to the closing delimiter of this group.
pub fn span_close(&self) -> Span {
^
1.29.0 · sourcepub fn set_span(&mut self, span: Span)
pub fn set_span(&mut self, span: 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§
1.29.0 · source§impl Display for Group
impl Display for Group
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.