enum

Unicode::CaseOptions

Inherits Enum / Comparable / Value / Object

Case options to pass to various Char and String methods such as upcase or downcase.

Constants

ASCII = 1

Only transform ASCII characters.

Turkic = 2

Use Turkic case rules:

'İ'.downcase(Unicode::CaseOptions::Turkic) # => 'i'
'I'.downcase(Unicode::CaseOptions::Turkic) # => 'ı'
'i'.upcase(Unicode::CaseOptions::Turkic)   # => 'İ'
'ı'.upcase(Unicode::CaseOptions::Turkic)   # => 'I'

Fold = 4

Unicode case folding, which is more far-reaching than Unicode case mapping.

Note that only full mappings are defined, and calling Char#downcase with this option will return its receiver unchanged if a multiple-character case folding exists, even if a separate single-character transformation is also defined in Unicode.

"ẞ".downcase(Unicode::CaseOptions::Fold) # => "ss"
'ẞ'.downcase(Unicode::CaseOptions::Fold) # => 'ẞ' # not U+00DF 'ß'

"ᾈ".downcase(Unicode::CaseOptions::Fold) # => "ἀι"
'ᾈ'.downcase(Unicode::CaseOptions::Fold) # => "ᾈ" # not U+1F80 'ᾀ'

None = 0

All = 7

Instance methods

ascii?

Returns true if this enum value contains ASCII

Source

fold?

Returns true if this enum value contains Fold

Source

none?

Source

turkic?

Returns true if this enum value contains Turkic

Source