Struct unicode_bidi::level::Level
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pub struct Level(_);
Embedding Level
Embedding Levels are numbers between 0 and 126 (inclusive), where even values denote a left-to-right (LTR) direction and odd values a right-to-left (RTL) direction.
This struct maintains a valid status for level numbers, meaning that creating a new level, or
mutating an existing level, with the value smaller than 0 (before conversion to u8) or
larger than 125 results in an Error.
Methods
impl Level[src]
fn ltr() -> Level
New LTR level with smallest number value (0).
fn rtl() -> Level
New RTL level with smallest number value (1).
fn max_implicit_depth() -> u8
Maximum depth of the directional status stack during implicit resolutions.
fn max_explicit_depth() -> u8
Maximum depth of the directional status stack during explicit resolutions.
fn new(number: u8) -> Result<Level, Error>
Create new level, fail if number is larger than max_depth + 1.
fn new_explicit(number: u8) -> Result<Level, Error>
Create new level, fail if number is larger than max_depth.
fn number(&self) -> u8
The level number.
fn is_ltr(&self) -> bool
If this level is left-to-right.
fn is_rtl(&self) -> bool
If this level is right-to-left.
fn raise(&mut self, amount: u8) -> Result<(), Error>
Raise level by amount, fail if number is larger than max_depth + 1.
fn raise_explicit(&mut self, amount: u8) -> Result<(), Error>
Raise level by amount, fail if number is larger than max_depth.
fn lower(&mut self, amount: u8) -> Result<(), Error>
Lower level by amount, fail if number goes below zero.
fn new_explicit_next_ltr(&self) -> Result<Level, Error>
The next LTR (even) level greater than this, or fail if number is larger than max_depth.
fn new_explicit_next_rtl(&self) -> Result<Level, Error>
The next RTL (odd) level greater than this, or fail if number is larger than max_depth.
fn new_lowest_ge_rtl(&self) -> Result<Level, Error>
The lowest RTL (odd) level greater than or equal to this, or fail if number is larger than
max_depth + 1.
fn bidi_class(&self) -> BidiClass
Generate a character type based on a level (as specified in steps X10 and N2).
fn vec(v: &[u8]) -> Vec<Level>
Trait Implementations
impl Copy for Level[src]
impl Clone for Level[src]
fn clone(&self) -> Level
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0
Performs copy-assignment from source. Read more
impl Debug for Level[src]
impl Eq for Level[src]
impl Ord for Level[src]
fn cmp(&self, __arg_0: &Level) -> Ordering
This method returns an Ordering between self and other. Read more
impl PartialEq for Level[src]
fn eq(&self, __arg_0: &Level) -> bool
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, __arg_0: &Level) -> bool
This method tests for !=.
impl PartialOrd for Level[src]
fn partial_cmp(&self, __arg_0: &Level) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
fn lt(&self, __arg_0: &Level) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
fn le(&self, __arg_0: &Level) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
fn gt(&self, __arg_0: &Level) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
fn ge(&self, __arg_0: &Level) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
impl Into<u8> for Level[src]
impl From<u8> for Level[src]
impl<'a> PartialEq<&'a str> for Level[src]
Used for matching levels in conformance tests
fn eq(&self, s: &&'a str) -> bool
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, other: &Rhs) -> bool1.0.0
This method tests for !=.
impl<'a> PartialEq<String> for Level[src]
Used for matching levels in conformance tests