Struct vapoursynth::map::MapRef

pub struct MapRef<'owner, 'elem> { /* private fields */ }

A reference to a VapourSynth map.

Methods from Deref<Target = Map<'elem>>

pub fn error(&self) -> Option<Cow<'_, str>>

Returns the error message contained in the map, if any.

pub fn key_count(&self) -> usize

Returns the number of keys contained in a map.

pub fn key(&self, index: usize) -> &str

Returns a key from a map.

Panics

Panics if index >= self.key_count().

pub fn keys(&self) -> Keys<'_, '_>

Returns an iterator over all keys in a map.

pub fn value_count(&self, key: &str) -> Result<usize>

Returns the number of elements associated with a key in a map.

pub fn value_type(&self, key: &str) -> Result<ValueType>

Retrieves a value type from a map.

pub fn get<'map, T: Value<'map, 'elem>>(&'map self, key: &str) -> Result<T>

Retrieves a property value.

pub fn get_iter<'map, T: Value<'map, 'elem>>(
    &'map self,
    key: &str
) -> Result<ValueIter<'map, 'elem, T>>

Retrieves an iterator over the map values.

pub fn get_int(&self, key: &str) -> Result<i64>

Retrieves an integer from a map.

This function retrieves the first value associated with the key.

pub fn get_int_iter<'map>(
    &'map self,
    key: &str
) -> Result<ValueIter<'map, 'elem, i64>>

Retrieves integers from a map.

pub fn get_int_array(&self, key: &str) -> Result<&[i64]>

Retrieves an array of integers from a map.

This is faster than iterating over a get_int_iter().

pub fn get_float(&self, key: &str) -> Result<f64>

Retrieves a floating point number from a map.

This function retrieves the first value associated with the key.

pub fn get_float_array(&self, key: &str) -> Result<&[f64]>

Retrieves an array of floating point numbers from a map.

This is faster than iterating over a get_float_iter().

pub fn get_float_iter<'map>(
    &'map self,
    key: &str
) -> Result<ValueIter<'map, 'elem, f64>>

Retrieves floating point numbers from a map.

pub fn get_data(&self, key: &str) -> Result<&[u8]>

Retrieves data from a map.

This function retrieves the first value associated with the key.

pub fn get_data_iter<'map>(
    &'map self,
    key: &str
) -> Result<ValueIter<'map, 'elem, &'map [u8]>>

Retrieves data from a map.

pub fn get_node(&self, key: &str) -> Result<Node<'elem>>

Retrieves a node from a map.

This function retrieves the first value associated with the key.

pub fn get_node_iter<'map>(
    &'map self,
    key: &str
) -> Result<ValueIter<'map, 'elem, Node<'elem>>>

Retrieves nodes from a map.

pub fn get_frame(&self, key: &str) -> Result<FrameRef<'elem>>

Retrieves a frame from a map.

This function retrieves the first value associated with the key.

pub fn get_frame_iter<'map>(
    &'map self,
    key: &str
) -> Result<ValueIter<'map, 'elem, FrameRef<'elem>>>

Retrieves frames from a map.

pub fn get_function(&self, key: &str) -> Result<Function<'elem>>

Retrieves a function from a map.

This function retrieves the first value associated with the key.

pub fn get_function_iter<'map>(
    &'map self,
    key: &str
) -> Result<ValueIter<'map, 'elem, Function<'elem>>>

Retrieves functions from a map.

Trait Implementations

impl<'owner, 'elem> Debug for MapRef<'owner, 'elem>

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

Formats the value using the given formatter.

impl<'owner, 'elem> Deref for MapRef<'owner, 'elem>

type Target = Map<'elem>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.