The high-level intermediate representation of a repetition operator.
A repetition operator permits the repetition of an arbitrary
sub-expression.
The kind of this repetition operator.
Whether this repetition operator is greedy or not. A greedy operator
will match as much as it can. A non-greedy operator will match as
little as it can.
Typically, operators are greedy by default and are only non-greedy when
a ?
suffix is used, e.g., (expr)*
is greedy while (expr)*?
is
not. However, this can be inverted via the U
"ungreedy" flag.
The expression being repeated.
Returns true if and only if this repetition operator makes it possible
to match the empty string.
Note that this is not defined inductively. For example, while a*
will report true
, ()+
will not, even though ()
matches the empty
string and one or more occurrences of something that matches the empty
string will always match the empty string. In order to get the
inductive definition, see the corresponding method on
Hir
.
This method tests for self
and other
values to be equal, and is used by ==
. Read more
This method tests for !=
.
Performs copy-assignment from source
. Read more
Formats the value using the given formatter. Read more
Creates owned data from borrowed data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static