pub struct Level(_);
Expand description

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.

http://www.unicode.org/reports/tr9/#BD2

Implementations

New LTR level with smallest number value (0).

New RTL level with smallest number value (1).

Maximum depth of the directional status stack during implicit resolutions.

Maximum depth of the directional status stack during explicit resolutions.

Create new level, fail if number is larger than max_depth + 1.

Create new level, fail if number is larger than max_depth.

The level number.

If this level is left-to-right.

If this level is right-to-left.

Raise level by amount, fail if number is larger than max_depth + 1.

Raise level by amount, fail if number is larger than max_depth.

Lower level by amount, fail if number goes below zero.

The next LTR (even) level greater than this, or fail if number is larger than max_depth.

The next RTL (odd) level greater than this, or fail if number is larger than max_depth.

The lowest RTL (odd) level greater than or equal to this, or fail if number is larger than max_depth + 1.

Generate a character type based on a level (as specified in steps X10 and N2).

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Create level by number

Convert to the level number

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

Used for matching levels in conformance tests

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

This method tests for !=.

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

This method tests for !=.

Used for matching levels in conformance tests

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

This method tests for !=.

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.