pub enum ValueRef<'a> {
Null,
Integer(i64),
Real(f64),
Text(&'a [u8]),
Blob(&'a [u8]),
}
Expand description
A non-owning dynamic type value. Typically the memory backing this value is owned by SQLite.
See Value
for an owning dynamic type value.
Variants§
Null
The value is a NULL
value.
Integer(i64)
The value is a signed integer.
Real(f64)
The value is a floating point number.
Text(&'a [u8])
The value is a text string.
Blob(&'a [u8])
The value is a blob of data
Implementations§
source§impl<'a> ValueRef<'a>
impl<'a> ValueRef<'a>
sourcepub fn as_i64(&self) -> FromSqlResult<i64>
pub fn as_i64(&self) -> FromSqlResult<i64>
If self
is case Integer
, returns the integral value. Otherwise,
returns Err(Error::InvalidColumnType)
.
sourcepub fn as_i64_or_null(&self) -> FromSqlResult<Option<i64>>
pub fn as_i64_or_null(&self) -> FromSqlResult<Option<i64>>
If self
is case Null
returns None.
If self
is case Integer
, returns the integral value.
Otherwise returns Err(Error::InvalidColumnType)
.
sourcepub fn as_f64(&self) -> FromSqlResult<f64>
pub fn as_f64(&self) -> FromSqlResult<f64>
If self
is case Real
, returns the floating point value. Otherwise,
returns Err(Error::InvalidColumnType)
.
sourcepub fn as_f64_or_null(&self) -> FromSqlResult<Option<f64>>
pub fn as_f64_or_null(&self) -> FromSqlResult<Option<f64>>
If self
is case Null
returns None.
If self
is case Real
, returns the floating point value.
Otherwise returns Err(Error::InvalidColumnType)
.
sourcepub fn as_str(&self) -> FromSqlResult<&'a str>
pub fn as_str(&self) -> FromSqlResult<&'a str>
If self
is case Text
, returns the string value. Otherwise, returns
Err(Error::InvalidColumnType)
.
sourcepub fn as_str_or_null(&self) -> FromSqlResult<Option<&'a str>>
pub fn as_str_or_null(&self) -> FromSqlResult<Option<&'a str>>
If self
is case Null
returns None.
If self
is case Text
, returns the string value.
Otherwise returns Err(Error::InvalidColumnType)
.
sourcepub fn as_blob(&self) -> FromSqlResult<&'a [u8]>
pub fn as_blob(&self) -> FromSqlResult<&'a [u8]>
If self
is case Blob
, returns the byte slice. Otherwise, returns
Err(Error::InvalidColumnType)
.
sourcepub fn as_blob_or_null(&self) -> FromSqlResult<Option<&'a [u8]>>
pub fn as_blob_or_null(&self) -> FromSqlResult<Option<&'a [u8]>>
If self
is case Null
returns None.
If self
is case Blob
, returns the byte slice.
Otherwise returns Err(Error::InvalidColumnType)
.
sourcepub fn as_bytes(&self) -> FromSqlResult<&'a [u8]>
pub fn as_bytes(&self) -> FromSqlResult<&'a [u8]>
Returns the byte slice that makes up this ValueRef
if it’s either
ValueRef::Blob
or ValueRef::Text
.
sourcepub fn as_bytes_or_null(&self) -> FromSqlResult<Option<&'a [u8]>>
pub fn as_bytes_or_null(&self) -> FromSqlResult<Option<&'a [u8]>>
If self
is case Null
returns None.
If self
is ValueRef::Blob
or ValueRef::Text
returns the byte
slice that makes up this value
Trait Implementations§
source§impl<'a> PartialEq for ValueRef<'a>
impl<'a> PartialEq for ValueRef<'a>
impl<'a> Copy for ValueRef<'a>
impl<'a> StructuralPartialEq for ValueRef<'a>
Auto Trait Implementations§
impl<'a> Freeze for ValueRef<'a>
impl<'a> RefUnwindSafe for ValueRef<'a>
impl<'a> Send for ValueRef<'a>
impl<'a> Sync for ValueRef<'a>
impl<'a> Unpin for ValueRef<'a>
impl<'a> UnwindSafe for ValueRef<'a>
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§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)source§impl<T> CloneToUninit for Twhere
T: Copy,
impl<T> CloneToUninit for Twhere
T: Copy,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)