Struct fdb::tuple::TupleSchema

pub struct TupleSchema { /* private fields */ }

Represents a schema for a Tuple.

A TupleSchema consists of TupleSchemaElements. TupleSchema::validate method can be used to verify the conformance of a value of Tuple to its schema.

Implementations

impl TupleSchema

pub fn new() -> TupleSchema

Create a new TupleSchema

pub fn get(&self, index: usize) -> Option<&TupleSchemaElement>

Provides a reference to TupleSchemaElement at the given index.

pub fn pop_back(&mut self) -> Option<TupleSchemaElement>

Removes the last TupleSchemaElement from the TupleSchema and returns it, or None if it is empty.

pub fn pop_front(&mut self) -> Option<TupleSchemaElement>

Removes the first TupleSchemaElement from the TupleSchema and returns it, or None if it is empty.

pub fn push_back(&mut self, value: TupleSchemaElement)

Appends a TupleSchemaElement.

pub fn push_front(&mut self, value: TupleSchemaElement)

Prepends a TupleSchemaElement.

pub fn is_empty(&self) -> bool

Returns true if the TupleSchema is empty.

pub fn len(&self) -> usize

Returns the number of TupleSchemaElement’s in the TupleSchema.

pub fn validate(&self, tuple: &Tuple) -> bool

Check if the Tuple conforms to this TupleSchema.

pub fn iter(&self) -> Iter<'_, TupleSchemaElement>

Returns an iterator of TupleSchemaElement.

Trait Implementations

impl Clone for TupleSchema

fn clone(&self) -> TupleSchema

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TupleSchema

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

Formats the value using the given formatter.

impl Default for TupleSchema

fn default() -> TupleSchema

Returns the “default value” for a type.

impl PartialEq<TupleSchema> for TupleSchema

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl StructuralPartialEq for TupleSchema