Enum ValueRef 

pub enum ValueRef<'a> {
    Null,
    Integer(i64),
    Real(f64),
    Text(&'a [u8]),
    Blob(&'a [u8]),
}

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

impl ValueRef<'_>

pub fn data_type(&self) -> Type

Returns SQLite fundamental datatype.

impl<'a> ValueRef<'a>

pub fn as_i64(&self) -> FromSqlResult<i64>

If self is case Integer, returns the integral value. Otherwise, returns Err(FromSqlError::InvalidType).

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(FromSqlError::InvalidType).

pub fn as_f64(&self) -> FromSqlResult<f64>

If self is case Real, returns the floating point value. Otherwise, returns Err(FromSqlError::InvalidType).

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(FromSqlError::InvalidType).

pub fn as_str(&self) -> FromSqlResult<&'a str>

If self is case Text, returns the string value. Otherwise, returns Err(FromSqlError::InvalidType).

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(FromSqlError::InvalidType).

pub fn as_blob(&self) -> FromSqlResult<&'a [u8]>

If self is case Blob, returns the byte slice. Otherwise, returns Err(FromSqlError::InvalidType).

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(FromSqlError::InvalidType).

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.

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

impl<'a> Clone for ValueRef<'a>

fn clone(&self) -> ValueRef<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for ValueRef<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> From<&'a [u8]> for ValueRef<'a>

fn from(s: &[u8]) -> ValueRef<'_>

Converts to this type from the input type.

impl<'a> From<&'a Value> for ValueRef<'a>

fn from(value: &'a Value) -> Self

Converts to this type from the input type.

impl<'a> From<&'a str> for ValueRef<'a>

fn from(s: &str) -> ValueRef<'_>

Converts to this type from the input type.

impl<T> From<Option<T>> for ValueRef<'_>

where T: Into<Self>,

fn from(s: Option<T>) -> Self

Converts to this type from the input type.

impl From<ValueRef<'_>> for Value

fn from(borrowed: ValueRef<'_>) -> Self

Converts to this type from the input type.

impl<'a> PartialEq for ValueRef<'a>

fn eq(&self, other: &ValueRef<'a>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> Copy for ValueRef<'a>

impl<'a> StructuralPartialEq for ValueRef<'a>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 24 bytes

Size for each variant:

• Null: 0 bytes
• Integer: 8 bytes
• Real: 8 bytes
• Text: 16 bytes
• Blob: 16 bytes