Struct FuncCodeLen

pub struct FuncCodeLen(/* private fields */);

A newtype containing a function pointer dispatching the read method for a code.

This is a more efficient way to pass a StaticCodeRead to a method, as a FuncCodeReader does not need to do a runtime test to dispatch the correct code.

Instances can be obtained by calling the new method with method with a variant of the Codes enum, or by calling the new_with_func method with a function pointer.

Note that since selection of the code happens in the new method, it is more efficient to clone a FuncCodeReader than to create a new one.

Implementations

impl FuncCodeLen

pub fn new(code: Codes) -> Result<Self>

Return a new FuncCodeLen for the given code.

Errors

The method will return an error if there is no constant for the given code in FuncCodeLen.

pub fn new_with_func(len_func: fn(u64) -> usize) -> Self

Return a new FuncCodeReader for the given function.

pub fn get_func(&self) -> fn(u64) -> usize

Get the function pointer for the code.

Trait Implementations

impl Clone for FuncCodeLen

fn clone(&self) -> FuncCodeLen

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl CodeLen for FuncCodeLen

Here we do not depend on the bitstream, so there is no need for a “static” version of the trait.

fn len(&self, value: u64) -> usize

Return the length of the codeword for value.

impl CopyType for FuncCodeLen

where fn(u64) -> usize: MemSize,

type Copy = False

impl Debug for FuncCodeLen

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

Formats the value using the given formatter.

impl MemDbgImpl for FuncCodeLen

where fn(u64) -> usize: MemDbgImpl,

fn _mem_dbg_rec_on( &self, _memdbg_writer: &mut impl Write, _memdbg_total_size: usize, _memdbg_max_depth: usize, _memdbg_prefix: &mut String, _memdbg_is_last: bool, _memdbg_flags: DbgFlags, ) -> Result

fn _mem_dbg_depth_on( &self, writer: &mut impl Write, total_size: usize, max_depth: usize, prefix: &mut String, field_name: Option<&str>, is_last: bool, padded_size: usize, flags: DbgFlags, ) -> Result<(), Error>

impl MemSize for FuncCodeLen

where fn(u64) -> usize: MemSize,

fn mem_size(&self, _memsize_flags: SizeFlags) -> usize

Returns the (recursively computed) overall memory size of the structure in bytes.

impl PartialEq for FuncCodeLen

fn eq(&self, other: &FuncCodeLen) -> 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 Copy for FuncCodeLen

impl Eq for FuncCodeLen

impl StructuralPartialEq for FuncCodeLen