CT_EXPORT const CFStringRef kCTFontSymbolicTrait CT_AVAILABLE(10_5, 3_2);
CT_EXPORT const CFStringRef kCTFontWeightTrait CT_AVAILABLE(10_5, 3_2);
CT_EXPORT const CFStringRef kCTFontWidthTrait CT_AVAILABLE(10_5, 3_2);
CT_EXPORT const CFStringRef kCTFontSlantTrait CT_AVAILABLE(10_5, 3_2);
enum {
    kCTFontClassMaskShift = 28
};

typedef CF_OPTIONS(uint32_t, CTFontSymbolicTraits) {
    kCTFontTraitItalic              = (1 << 0),     // Additional detail available via kCTFontSlantTrait
    kCTFontTraitBold                = (1 << 1),     // Additional detail available via kCTFontWeightTrait
    kCTFontTraitExpanded            = (1 << 5),     // Expanded and condensed traits are mutually exclusive
    kCTFontTraitCondensed           = (1 << 6),     // Additional detail available via kCTFontWidthTrait
    kCTFontTraitMonoSpace           = (1 << 10),    // Use fixed-pitch glyphs if available. May have multiple glyph advances (most CJK glyphs may contain two spaces)
    kCTFontTraitVertical            = (1 << 11),    // Use vertical glyph variants and metrics
    kCTFontTraitUIOptimized         = (1 << 12),    // Synthesize appropriate attributes for UI rendering such as control titles if necessary
    kCTFontTraitColorGlyphs         = (1 << 13),    // Color bitmap glyphs are available. 
    kCTFontTraitComposite           = (1 << 14),    // The font is a CFR (Composite font reference), a cascade list is expected per font. 

    kCTFontTraitClassMask           = (15U << kCTFontClassMaskShift),
                                                    // Mask for the font class

    kCTFontItalicTrait = kCTFontTraitItalic,
    kCTFontBoldTrait = kCTFontTraitBold,
    kCTFontExpandedTrait = kCTFontTraitExpanded,
    kCTFontCondensedTrait = kCTFontTraitCondensed,
    kCTFontMonoSpaceTrait = kCTFontTraitMonoSpace,
    kCTFontVerticalTrait = kCTFontTraitVertical,
    kCTFontUIOptimizedTrait = kCTFontTraitUIOptimized,
    kCTFontColorGlyphsTrait = kCTFontTraitColorGlyphs,
    kCTFontCompositeTrait = kCTFontTraitComposite,
    kCTFontClassMaskTrait = kCTFontTraitClassMask
};

typedef CF_OPTIONS(uint32_t, CTFontStylisticClass) {
    kCTFontClassUnknown             = (0 << kCTFontClassMaskShift),
    kCTFontClassOldStyleSerifs      = (1 << kCTFontClassMaskShift),
    kCTFontClassTransitionalSerifs  = (2 << kCTFontClassMaskShift),
    kCTFontClassModernSerifs        = (3 << kCTFontClassMaskShift),
    kCTFontClassClarendonSerifs     = (4 << kCTFontClassMaskShift),
    kCTFontClassSlabSerifs          = (5 << kCTFontClassMaskShift),
    kCTFontClassFreeformSerifs      = (7 << kCTFontClassMaskShift),
    kCTFontClassSansSerif           = (8U << kCTFontClassMaskShift),
    kCTFontClassOrnamentals         = (9U << kCTFontClassMaskShift),
    kCTFontClassScripts             = (10U << kCTFontClassMaskShift),
    kCTFontClassSymbolic            = (12U << kCTFontClassMaskShift),

    kCTFontUnknownClass = kCTFontClassUnknown,
    kCTFontOldStyleSerifsClass = kCTFontClassOldStyleSerifs,
    kCTFontTransitionalSerifsClass = kCTFontClassTransitionalSerifs,
    kCTFontModernSerifsClass = kCTFontClassModernSerifs,
    kCTFontClarendonSerifsClass = kCTFontClassClarendonSerifs,
    kCTFontSlabSerifsClass = kCTFontClassSlabSerifs,
    kCTFontFreeformSerifsClass = kCTFontClassFreeformSerifs,
    kCTFontSansSerifClass = kCTFontClassSansSerif,
    kCTFontOrnamentalsClass = kCTFontClassOrnamentals,
    kCTFontScriptsClass = kCTFontClassScripts,
    kCTFontSymbolicClass = kCTFontClassSymbolic
};