Group in proc_macro - Rust (original) (raw)
Struct Group
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pub struct Group(/* private fields */);Expand description
A delimited token stream.
A Group internally contains a TokenStream which is surrounded by Delimiters.
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Creates a new Group with the given delimiter and token stream.
This constructor will set the span for this group toSpan::call_site(). To change the span you can use the set_spanmethod below.
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Returns the delimiter of this Group
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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.
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Returns the span for the delimiters of this token stream, spanning the entire Group.
pub fn span(&self) -> Span {
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Returns the span pointing to the opening delimiter of this group.
pub fn span_open(&self) -> Span {
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Returns the span pointing to the closing delimiter of this group.
pub fn span_close(&self) -> 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.
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.
Converts to this type from the input type.
🔬This is a nightly-only experimental API. (proc_macro_totokens #130977)
Write self to the given TokenStream. Read more
🔬This is a nightly-only experimental API. (proc_macro_totokens #130977)
Convert self directly into a TokenStream object. Read more
🔬This is a nightly-only experimental API. (proc_macro_totokens #130977)
Convert self directly into a TokenStream object. Read more