Enum OpaqueCursor 

pub enum OpaqueCursor {
    Absent,
    Present(String),
}

An opaque cursor where only absence means the end of a paginated result set.

Variants

Absent

The wire field was absent.

Present(String)

The wire field was present, including the valid empty string.

Implementations

impl OpaqueCursor

pub fn from_presence(value: Option<String>) -> Self

Preserves absent, empty, and nonempty cursor states distinctly.

pub fn try_from_presence(value: Option<String>) -> Result<Self, CommonTypeError>

Admits a bounded cursor while preserving absent and empty states.

pub fn as_present(&self) -> Option<&str>

Returns the present value, if the field occurred on the wire.

Trait Implementations

impl Clone for OpaqueCursor

fn clone(&self) -> OpaqueCursor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OpaqueCursor

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for OpaqueCursor

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for OpaqueCursor

impl PartialEq for OpaqueCursor

fn eq(&self, other: &OpaqueCursor) -> bool

Equality operator ==.

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

Inequality operator !=.

impl Serialize for OpaqueCursor

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for OpaqueCursor