Module icu_properties::sets

The functions in this module return a CodePointSetData containing the set of characters with a particular Unicode property.

The descriptions of most properties are taken from TR44, the documentation for the Unicode Character Database. Some properties are instead defined in TR18, the documentation for Unicode regular expressions. In particular, Annex C of this document defines properties for POSIX compatibility.

Structs

• CodePointSetData
  A wrapper around code point set data. It is returned by APIs that return Unicode property data in a set-like form, ex: a set of code points sharing the same value for a Unicode property. Access its data via the borrowed version, CodePointSetDataBorrowed.
• CodePointSetDataBorrowed
  A borrowed wrapper around code point set data, returned by CodePointSetData::as_borrowed(). More efficient to query.
• UnicodeSetData
  A wrapper around UnicodeSet data (characters and strings)
• UnicodeSetDataBorrowed
  A borrowed wrapper around code point set data, returned by UnicodeSetData::as_borrowed(). More efficient to query.

Functions

• load_alnum
  Characters with the Alphabetic or Decimal_Number property This is defined for POSIX compatibility.
• load_alphabetic
  Alphabetic characters
• load_ascii_hex_digit
  ASCII characters commonly used for the representation of hexadecimal numbers
• load_basic_emoji
  Characters and character sequences intended for general-purpose, independent, direct input. See Unicode Technical Standard #51 for more details.
• load_bidi_control
  Format control characters which have specific functions in the Unicode Bidirectional Algorithm
• load_bidi_mirrored
  Characters that are mirrored in bidirectional text
• load_blank
  Horizontal whitespace characters
• load_case_ignorable
  Characters which are ignored for casing purposes
• load_case_sensitive
  Characters that are either the source of a case mapping or in the target of a case mapping
• load_cased
  Uppercase, lowercase, and titlecase characters
• load_changes_when_casefolded
  Characters whose normalized forms are not stable under case folding
• load_changes_when_casemapped
  Characters which may change when they undergo case mapping
• load_changes_when_lowercased
  Characters whose normalized forms are not stable under a toLowercase mapping
• load_changes_when_nfkc_casefolded
  Characters which are not identical to their NFKC_Casefold mapping
• load_changes_when_titlecased
  Characters whose normalized forms are not stable under a toTitlecase mapping
• load_changes_when_uppercased
  Characters whose normalized forms are not stable under a toUppercase mapping
• load_dash
  Punctuation characters explicitly called out as dashes in the Unicode Standard, plus their compatibility equivalents
• load_default_ignorable_code_point
  For programmatic determination of default ignorable code points. New characters that should be ignored in rendering (unless explicitly supported) will be assigned in these ranges, permitting programs to correctly handle the default rendering of such characters when not otherwise supported.
• load_deprecated
  Deprecated characters. No characters will ever be removed from the standard, but the usage of deprecated characters is strongly discouraged.
• load_diacritic
  Characters that linguistically modify the meaning of another character to which they apply
• load_emoji
  Characters that are emoji
• load_emoji_component
  Characters used in emoji sequences that normally do not appear on emoji keyboards as separate choices, such as base characters for emoji keycaps
• load_emoji_modifier
  Characters that are emoji modifiers
• load_emoji_modifier_base
  Characters that can serve as a base for emoji modifiers
• load_emoji_presentation
  Characters that have emoji presentation by default
• load_extended_pictographic
  Pictographic symbols, as well as reserved ranges in blocks largely associated with emoji characters
• load_extender
  Characters whose principal function is to extend the value of a preceding alphabetic character or to extend the shape of adjacent characters.
• load_for_ecma262_unstable
  Returns a type capable of looking up values for a property specified as a string, as long as it is a binary property listed in ECMA-262, using strict matching on the names in the spec.
• load_for_ecma262_with_any_provider
  Creates a new instance using an AnyProvider.
• load_for_ecma262_with_buffer_provider
  ✨ Enabled with the "serde" feature.
• load_for_general_category_group
  Return a CodePointSetData for a value or a grouping of values of the General_Category property. See GeneralCategoryGroup.
• load_full_composition_exclusion
  Characters that are excluded from composition See https://unicode.org/Public/UNIDATA/CompositionExclusions.txt
• load_graph
  Visible characters. This is defined for POSIX compatibility.
• load_grapheme_base
  Property used together with the definition of Standard Korean Syllable Block to define “Grapheme base”. See D58 in Chapter 3, Conformance in the Unicode Standard.
• load_grapheme_extend
  Property used to define “Grapheme extender”. See D59 in Chapter 3, Conformance in the Unicode Standard.
• load_grapheme_link
  Deprecated property. Formerly proposed for programmatic determination of grapheme cluster boundaries.
• load_hex_digit
  Characters commonly used for the representation of hexadecimal numbers, plus their compatibility equivalents
• load_hyphen
  Deprecated property. Dashes which are used to mark connections between pieces of words, plus the Katakana middle dot.
• load_id_continue
  Characters that can come after the first character in an identifier. If using NFKC to fold differences between characters, use load_xid_continue instead. See Unicode Standard Annex #31 for more details.
• load_id_start
  Characters that can begin an identifier. If using NFKC to fold differences between characters, use load_xid_start instead. See Unicode Standard Annex #31 for more details.
• load_ideographic
  Characters considered to be CJKV (Chinese, Japanese, Korean, and Vietnamese) ideographs, or related siniform ideographs
• load_ids_binary_operator
  Characters used in Ideographic Description Sequences
• load_ids_trinary_operator
  Characters used in Ideographic Description Sequences
• load_join_control
  Format control characters which have specific functions for control of cursive joining and ligation
• load_logical_order_exception
  A small number of spacing vowel letters occurring in certain Southeast Asian scripts such as Thai and Lao
• load_lowercase
  Lowercase characters
• load_math
  Characters used in mathematical notation
• load_nfc_inert
  Characters that are inert under NFC, i.e., they do not interact with adjacent characters
• load_nfd_inert
  Characters that are inert under NFD, i.e., they do not interact with adjacent characters
• load_nfkc_inert
  Characters that are inert under NFKC, i.e., they do not interact with adjacent characters
• load_nfkd_inert
  Characters that are inert under NFKD, i.e., they do not interact with adjacent characters
• load_noncharacter_code_point
  Code points permanently reserved for internal use
• load_pattern_syntax
  Characters used as syntax in patterns (such as regular expressions). See Unicode Standard Annex #31 for more details.
• load_pattern_white_space
  Characters used as whitespace in patterns (such as regular expressions). See Unicode Standard Annex #31 for more details.
• load_prepended_concatenation_mark
  A small class of visible format controls, which precede and then span a sequence of other characters, usually digits.
• load_print
  Printable characters (visible characters and whitespace). This is defined for POSIX compatibility.
• load_quotation_mark
  Punctuation characters that function as quotation marks.
• load_radical
  Characters used in the definition of Ideographic Description Sequences
• load_regional_indicator
  Regional indicator characters, U+1F1E6..U+1F1FF
• load_segment_starter
  Characters that are starters in terms of Unicode normalization and combining character sequences
• load_sentence_terminal
  Punctuation characters that generally mark the end of sentences
• load_soft_dotted
  Characters with a “soft dot”, like i or j. An accent placed on these characters causes the dot to disappear.
• load_terminal_punctuation
  Punctuation characters that generally mark the end of textual units
• load_unified_ideograph
  A property which specifies the exact set of Unified CJK Ideographs in the standard
• load_uppercase
  Uppercase characters
• load_variation_selector
  Characters that are Variation Selectors.
• load_white_space
  Spaces, separator characters and other control characters which should be treated by programming languages as “white space” for the purpose of parsing elements
• load_xdigit
  Hexadecimal digits This is defined for POSIX compatibility.
• load_xid_continue
  Characters that can come after the first character in an identifier. See Unicode Standard Annex #31 for more details.
• load_xid_start
  Characters that can begin an identifier. See Unicode Standard Annex #31 for more details.