CGPathRef CTFontCreatePathForGlyph (
    CTFontRef font,
    CGGlyph glyph,
    const CGAffineTransform *transform
);

CGPathRef _Nullable CTFontCreatePathForGlyph (
    CTFontRef _Nonnull font,
    CGGlyph glyph,
    const CGAffineTransform * _Nullable matrix
);

double CTFontGetAdvancesForGlyphs (
    CTFontRef font,
    CTFontOrientation orientation,
    const CGGlyph glyphs[],
    CGSize advances[],
    CFIndex count
);

double CTFontGetAdvancesForGlyphs (
    CTFontRef _Nonnull font,
    CTFontOrientation orientation,
    const CGGlyph glyphs[],
    CGSize * _Nullable advances,
    CFIndex count
);

CGRect CTFontGetBoundingRectsForGlyphs (
    CTFontRef font,
    CTFontOrientation orientation,
    const CGGlyph glyphs[],
    CGRect boundingRects[],
    CFIndex count
);

CGRect CTFontGetBoundingRectsForGlyphs (
    CTFontRef _Nonnull font,
    CTFontOrientation orientation,
    const CGGlyph glyphs[],
    CGRect * _Nullable boundingRects,
    CFIndex count
);

CFIndex CTFontGetLigatureCaretPositions (
    CTFontRef font,
    CGGlyph glyph,
    CGFloat positions[],
    CFIndex maxPositions
);

CFIndex CTFontGetLigatureCaretPositions (
    CTFontRef _Nonnull font,
    CGGlyph glyph,
    CGFloat * _Nullable positions,
    CFIndex maxPositions
);

CGRect CTFontGetOpticalBoundsForGlyphs (
    CTFontRef font,
    const CGGlyph glyphs[],
    CGRect boundingRects[],
    CFIndex count,
    CFOptionFlags options
);

CGRect CTFontGetOpticalBoundsForGlyphs (
    CTFontRef _Nonnull font,
    const CGGlyph glyphs[],
    CGRect * _Nullable boundingRects,
    CFIndex count,
    CFOptionFlags options
);

CTLineRef CTLineCreateWithAttributedString (
    CFAttributedStringRef string
);

CTLineRef _Nonnull CTLineCreateWithAttributedString (
    CFAttributedStringRef _Nonnull attrString
);