fold

Documentation

Overview

Package fold implements operations that map similar characters to a common target. These operations are called character foldings, and can be used to ignore certain distinctions between similar characters.

Each folder implements the transform.Transform interface.

DISCLAIMER: these folders are based on suggested foldings that appear in withdrawn drafts of Unicode technical reports. They may not be complete. Their names come from those technical reports.

WARNING: folding is NOT appropriate for secure contexts - see x/text/secure/precis instead.

See, for important commentary: - Unicode Technical Report 30: CHARACTER FOLDINGS (withdrawn, draft) - Unicode Technical Report 25: CHARACTER FOLDINGS (draft)

Index

• Variables

Variables

var Accents = accents

Accents is a transformer that removes accents from Latin/Greek/Cyrillic characters.

var CanonicalDuplicates = canonicalDuplicates

CanonicalDuplicates is a transformer that folds duplicate singletons (usually when the same character, for historical reasons, has two different code points) (e.g. Ohm => Omega)

var Dashes = dashes

Dashes is a transformer that folds everything in Unicode class Pd ("dash punctuation") to hyphen-minus '-'.

var Digits = digits

Digits is a transformer that folds digits in a native language or a typographical context to a substitute ASCII digit. Note that this maps to Unicode code points for the digits '0' to '9', not to the codepoints with integer values 0 to 9.

var GreekLetterforms = greekLetterforms

GreekLetterforms is a transformer that folds alternative Greek letterforms e.g. 'ϐ' to 'β'.

var HebrewAlternates = hebrewAlternates

HebrewAlternates is a transformer that folds e.g. wide Hebrew characters to non-wide variants.

var Jamo = jamo

Jamo folding converts from the Hangul Compatibility Jamo Unicode block to the Hangul Jamo Unicode block.

var Math = math

Math folding converts font variants, excluding the HebrewAlternates.

var NoBreak = noBreak

NoBreak folding converts non-breaking space and non-breaking hyphens.

var Positional = positional

Positional folding performs positional forms folding including Arabic ligatures.

var Small = small

Small folding converts small variant forms into normal forms.

var Space = space

Space folding converts all spaces to a single 0x0020 space.