pub enum ErrorKind {
Syntax(String),
Unsupported(String),
Serialize(String),
StateIDOverflow {
max: usize,
},
PremultiplyOverflow {
max: usize,
requested_max: usize,
},
}
Expand description
The kind of error that occurred.
Variants§
Syntax(String)
An error that occurred while parsing a regular expression. Note that this error may be printed over multiple lines, and is generally intended to be end user readable on its own.
Unsupported(String)
An error that occurred because an unsupported regex feature was used. The message string describes which unsupported feature was used.
The primary regex features that are unsupported are those that require
look-around, such as the ^
and $
anchors and the word boundary
assertion \b
. These may be supported in the future.
Serialize(String)
An error that occurred when attempting to serialize a DFA to bytes.
StateIDOverflow
An error that occurs when constructing a DFA would require the use of
a state ID that overflows the chosen state ID representation. For
example, if one is using u8
for state IDs and builds a DFA with
257 states, then the last state’s ID will be 256
which cannot be
represented with u8
.
Typically, this error occurs in the determinization process of building a DFA (the conversion step from NFA to DFA). It can also occur when trying to build a smaller DFA from an existing one.
PremultiplyOverflow
An error that occurs when premultiplication of state IDs is requested, but doing so would overflow the chosen state ID representation.
When max == requested_max
, then the state ID would overflow usize
.
Trait Implementations§
Auto Trait Implementations§
impl Freeze for ErrorKind
impl RefUnwindSafe for ErrorKind
impl Send for ErrorKind
impl Sync for ErrorKind
impl Unpin for ErrorKind
impl UnwindSafe for ErrorKind
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)