read_fonts/generated/

generated_ift.rs

// THIS FILE IS AUTOGENERATED.
// Any changes to this file will be overwritten.
// For more information about how codegen works, see font-codegen/README.md

#[allow(unused_imports)]
use crate::codegen_prelude::*;

#[derive(Clone)]
pub enum Ift<'a> {
    Format1(PatchMapFormat1<'a>),
    Format2(PatchMapFormat2<'a>),
}

impl<'a> Ift<'a> {
    ///Return the `FontData` used to resolve offsets for this table.
    pub fn offset_data(&self) -> FontData<'a> {
        match self {
            Self::Format1(item) => item.offset_data(),
            Self::Format2(item) => item.offset_data(),
        }
    }

    /// Format identifier: format = 1
    pub fn format(&self) -> u8 {
        match self {
            Self::Format1(item) => item.format(),
            Self::Format2(item) => item.format(),
        }
    }

    /// Unique ID that identifies compatible patches.
    pub fn compatibility_id(&self) -> CompatibilityId {
        match self {
            Self::Format1(item) => item.compatibility_id(),
            Self::Format2(item) => item.compatibility_id(),
        }
    }

    pub fn uri_template_length(&self) -> u16 {
        match self {
            Self::Format1(item) => item.uri_template_length(),
            Self::Format2(item) => item.uri_template_length(),
        }
    }

    pub fn uri_template(&self) -> &'a [u8] {
        match self {
            Self::Format1(item) => item.uri_template(),
            Self::Format2(item) => item.uri_template(),
        }
    }
}

impl<'a> FontRead<'a> for Ift<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let format: u8 = data.read_at(0usize)?;
        match format {
            PatchMapFormat1Marker::FORMAT => Ok(Self::Format1(FontRead::read(data)?)),
            PatchMapFormat2Marker::FORMAT => Ok(Self::Format2(FontRead::read(data)?)),
            other => Err(ReadError::InvalidFormat(other.into())),
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> Ift<'a> {
    fn dyn_inner<'b>(&'b self) -> &'b dyn SomeTable<'a> {
        match self {
            Self::Format1(table) => table,
            Self::Format2(table) => table,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for Ift<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        self.dyn_inner().fmt(f)
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for Ift<'a> {
    fn type_name(&self) -> &str {
        self.dyn_inner().type_name()
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        self.dyn_inner().get_field(idx)
    }
}

impl Format<u8> for PatchMapFormat1Marker {
    const FORMAT: u8 = 1;
}

/// [Patch Map Format Format 1](https://w3c.github.io/IFT/Overview.html#patch-map-format-1)
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct PatchMapFormat1Marker {
    applied_entries_bitmap_byte_len: usize,
    uri_template_byte_len: usize,
}

impl PatchMapFormat1Marker {
    pub fn format_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + u8::RAW_BYTE_LEN
    }

    pub fn _reserved_byte_range(&self) -> Range<usize> {
        let start = self.format_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn compatibility_id_byte_range(&self) -> Range<usize> {
        let start = self._reserved_byte_range().end;
        start..start + CompatibilityId::RAW_BYTE_LEN
    }

    pub fn max_entry_index_byte_range(&self) -> Range<usize> {
        let start = self.compatibility_id_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }

    pub fn max_glyph_map_entry_index_byte_range(&self) -> Range<usize> {
        let start = self.max_entry_index_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }

    pub fn glyph_count_byte_range(&self) -> Range<usize> {
        let start = self.max_glyph_map_entry_index_byte_range().end;
        start..start + Uint24::RAW_BYTE_LEN
    }

    pub fn glyph_map_offset_byte_range(&self) -> Range<usize> {
        let start = self.glyph_count_byte_range().end;
        start..start + Offset32::RAW_BYTE_LEN
    }

    pub fn feature_map_offset_byte_range(&self) -> Range<usize> {
        let start = self.glyph_map_offset_byte_range().end;
        start..start + Offset32::RAW_BYTE_LEN
    }

    pub fn applied_entries_bitmap_byte_range(&self) -> Range<usize> {
        let start = self.feature_map_offset_byte_range().end;
        start..start + self.applied_entries_bitmap_byte_len
    }

    pub fn uri_template_length_byte_range(&self) -> Range<usize> {
        let start = self.applied_entries_bitmap_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }

    pub fn uri_template_byte_range(&self) -> Range<usize> {
        let start = self.uri_template_length_byte_range().end;
        start..start + self.uri_template_byte_len
    }

    pub fn patch_encoding_byte_range(&self) -> Range<usize> {
        let start = self.uri_template_byte_range().end;
        start..start + u8::RAW_BYTE_LEN
    }
}

impl<'a> FontRead<'a> for PatchMapFormat1<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<u8>();
        cursor.advance::<u32>();
        cursor.advance::<CompatibilityId>();
        let max_entry_index: u16 = cursor.read()?;
        cursor.advance::<u16>();
        cursor.advance::<Uint24>();
        cursor.advance::<Offset32>();
        cursor.advance::<Offset32>();
        let applied_entries_bitmap_byte_len = (transforms::max_value_bitmap_len(max_entry_index))
            .checked_mul(u8::RAW_BYTE_LEN)
            .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(applied_entries_bitmap_byte_len);
        let uri_template_length: u16 = cursor.read()?;
        let uri_template_byte_len = (uri_template_length as usize)
            .checked_mul(u8::RAW_BYTE_LEN)
            .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(uri_template_byte_len);
        cursor.advance::<u8>();
        cursor.finish(PatchMapFormat1Marker {
            applied_entries_bitmap_byte_len,
            uri_template_byte_len,
        })
    }
}

/// [Patch Map Format Format 1](https://w3c.github.io/IFT/Overview.html#patch-map-format-1)
pub type PatchMapFormat1<'a> = TableRef<'a, PatchMapFormat1Marker>;

impl<'a> PatchMapFormat1<'a> {
    /// Format identifier: format = 1
    pub fn format(&self) -> u8 {
        let range = self.shape.format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Unique ID that identifies compatible patches.
    pub fn compatibility_id(&self) -> CompatibilityId {
        let range = self.shape.compatibility_id_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Largest entry index which appears in either the glyph map or feature map.
    pub fn max_entry_index(&self) -> u16 {
        let range = self.shape.max_entry_index_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Largest entry index which appears in the glyph map.
    pub fn max_glyph_map_entry_index(&self) -> u16 {
        let range = self.shape.max_glyph_map_entry_index_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn glyph_count(&self) -> Uint24 {
        let range = self.shape.glyph_count_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Sub table that maps glyph ids to entry indices.
    pub fn glyph_map_offset(&self) -> Offset32 {
        let range = self.shape.glyph_map_offset_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Attempt to resolve [`glyph_map_offset`][Self::glyph_map_offset].
    pub fn glyph_map(&self) -> Result<GlyphMap<'a>, ReadError> {
        let data = self.data;
        let args = (self.glyph_count(), self.max_entry_index());
        self.glyph_map_offset().resolve_with_args(data, &args)
    }

    /// Sub table that maps feature and glyph ids to entry indices.
    pub fn feature_map_offset(&self) -> Nullable<Offset32> {
        let range = self.shape.feature_map_offset_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Attempt to resolve [`feature_map_offset`][Self::feature_map_offset].
    pub fn feature_map(&self) -> Option<Result<FeatureMap<'a>, ReadError>> {
        let data = self.data;
        let args = self.max_entry_index();
        self.feature_map_offset().resolve_with_args(data, &args)
    }

    pub fn applied_entries_bitmap(&self) -> &'a [u8] {
        let range = self.shape.applied_entries_bitmap_byte_range();
        self.data.read_array(range).unwrap()
    }

    pub fn uri_template_length(&self) -> u16 {
        let range = self.shape.uri_template_length_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn uri_template(&self) -> &'a [u8] {
        let range = self.shape.uri_template_byte_range();
        self.data.read_array(range).unwrap()
    }

    /// Patch format number for patches referenced by this mapping.
    pub fn patch_encoding(&self) -> u8 {
        let range = self.shape.patch_encoding_byte_range();
        self.data.read_at(range.start).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for PatchMapFormat1<'a> {
    fn type_name(&self) -> &str {
        "PatchMapFormat1"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("format", self.format())),
            1usize => Some(Field::new(
                "compatibility_id",
                traversal::FieldType::Unknown,
            )),
            2usize => Some(Field::new("max_entry_index", self.max_entry_index())),
            3usize => Some(Field::new(
                "max_glyph_map_entry_index",
                self.max_glyph_map_entry_index(),
            )),
            4usize => Some(Field::new("glyph_count", self.glyph_count())),
            5usize => Some(Field::new(
                "glyph_map_offset",
                FieldType::offset(self.glyph_map_offset(), self.glyph_map()),
            )),
            6usize => Some(Field::new(
                "feature_map_offset",
                FieldType::offset(self.feature_map_offset(), self.feature_map()),
            )),
            7usize => Some(Field::new(
                "applied_entries_bitmap",
                self.applied_entries_bitmap(),
            )),
            8usize => Some(Field::new(
                "uri_template_length",
                self.uri_template_length(),
            )),
            9usize => Some(Field::new("uri_template", self.uri_template())),
            10usize => Some(Field::new("patch_encoding", self.patch_encoding())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for PatchMapFormat1<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct GlyphMapMarker {
    max_entry_index: u16,
    entry_index_byte_len: usize,
}

impl GlyphMapMarker {
    pub fn first_mapped_glyph_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + u16::RAW_BYTE_LEN
    }

    pub fn entry_index_byte_range(&self) -> Range<usize> {
        let start = self.first_mapped_glyph_byte_range().end;
        start..start + self.entry_index_byte_len
    }
}

impl ReadArgs for GlyphMap<'_> {
    type Args = (Uint24, u16);
}

impl<'a> FontReadWithArgs<'a> for GlyphMap<'a> {
    fn read_with_args(data: FontData<'a>, args: &(Uint24, u16)) -> Result<Self, ReadError> {
        let (glyph_count, max_entry_index) = *args;
        let mut cursor = data.cursor();
        let first_mapped_glyph: u16 = cursor.read()?;
        let entry_index_byte_len = (transforms::subtract(glyph_count, first_mapped_glyph))
            .checked_mul(<U8Or16 as ComputeSize>::compute_size(&max_entry_index)?)
            .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(entry_index_byte_len);
        cursor.finish(GlyphMapMarker {
            max_entry_index,
            entry_index_byte_len,
        })
    }
}

impl<'a> GlyphMap<'a> {
    /// A constructor that requires additional arguments.
    ///
    /// This type requires some external state in order to be
    /// parsed.
    pub fn read(
        data: FontData<'a>,
        glyph_count: Uint24,
        max_entry_index: u16,
    ) -> Result<Self, ReadError> {
        let args = (glyph_count, max_entry_index);
        Self::read_with_args(data, &args)
    }
}

pub type GlyphMap<'a> = TableRef<'a, GlyphMapMarker>;

impl<'a> GlyphMap<'a> {
    pub fn first_mapped_glyph(&self) -> u16 {
        let range = self.shape.first_mapped_glyph_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn entry_index(&self) -> ComputedArray<'a, U8Or16> {
        let range = self.shape.entry_index_byte_range();
        self.data
            .read_with_args(range, &self.max_entry_index())
            .unwrap()
    }

    pub(crate) fn max_entry_index(&self) -> u16 {
        self.shape.max_entry_index
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for GlyphMap<'a> {
    fn type_name(&self) -> &str {
        "GlyphMap"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("first_mapped_glyph", self.first_mapped_glyph())),
            1usize => Some(Field::new("entry_index", traversal::FieldType::Unknown)),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for GlyphMap<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct FeatureMapMarker {
    max_entry_index: u16,
    feature_records_byte_len: usize,
    entry_map_data_byte_len: usize,
}

impl FeatureMapMarker {
    pub fn feature_count_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + u16::RAW_BYTE_LEN
    }

    pub fn feature_records_byte_range(&self) -> Range<usize> {
        let start = self.feature_count_byte_range().end;
        start..start + self.feature_records_byte_len
    }

    pub fn entry_map_data_byte_range(&self) -> Range<usize> {
        let start = self.feature_records_byte_range().end;
        start..start + self.entry_map_data_byte_len
    }
}

impl ReadArgs for FeatureMap<'_> {
    type Args = u16;
}

impl<'a> FontReadWithArgs<'a> for FeatureMap<'a> {
    fn read_with_args(data: FontData<'a>, args: &u16) -> Result<Self, ReadError> {
        let max_entry_index = *args;
        let mut cursor = data.cursor();
        let feature_count: u16 = cursor.read()?;
        let feature_records_byte_len = (feature_count as usize)
            .checked_mul(<FeatureRecord as ComputeSize>::compute_size(
                &max_entry_index,
            )?)
            .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(feature_records_byte_len);
        let entry_map_data_byte_len =
            cursor.remaining_bytes() / u8::RAW_BYTE_LEN * u8::RAW_BYTE_LEN;
        cursor.advance_by(entry_map_data_byte_len);
        cursor.finish(FeatureMapMarker {
            max_entry_index,
            feature_records_byte_len,
            entry_map_data_byte_len,
        })
    }
}

impl<'a> FeatureMap<'a> {
    /// A constructor that requires additional arguments.
    ///
    /// This type requires some external state in order to be
    /// parsed.
    pub fn read(data: FontData<'a>, max_entry_index: u16) -> Result<Self, ReadError> {
        let args = max_entry_index;
        Self::read_with_args(data, &args)
    }
}

pub type FeatureMap<'a> = TableRef<'a, FeatureMapMarker>;

impl<'a> FeatureMap<'a> {
    pub fn feature_count(&self) -> u16 {
        let range = self.shape.feature_count_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn feature_records(&self) -> ComputedArray<'a, FeatureRecord> {
        let range = self.shape.feature_records_byte_range();
        self.data
            .read_with_args(range, &self.max_entry_index())
            .unwrap()
    }

    pub fn entry_map_data(&self) -> &'a [u8] {
        let range = self.shape.entry_map_data_byte_range();
        self.data.read_array(range).unwrap()
    }

    pub(crate) fn max_entry_index(&self) -> u16 {
        self.shape.max_entry_index
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for FeatureMap<'a> {
    fn type_name(&self) -> &str {
        "FeatureMap"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("feature_count", self.feature_count())),
            1usize => Some(Field::new("feature_records", traversal::FieldType::Unknown)),
            2usize => Some(Field::new("entry_map_data", self.entry_map_data())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for FeatureMap<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

#[derive(Clone, Debug)]
pub struct FeatureRecord {
    pub feature_tag: BigEndian<Tag>,
    pub first_new_entry_index: U8Or16,
    pub entry_map_count: U8Or16,
}

impl FeatureRecord {
    pub fn feature_tag(&self) -> Tag {
        self.feature_tag.get()
    }

    pub fn first_new_entry_index(&self) -> &U8Or16 {
        &self.first_new_entry_index
    }

    pub fn entry_map_count(&self) -> &U8Or16 {
        &self.entry_map_count
    }
}

impl ReadArgs for FeatureRecord {
    type Args = u16;
}

impl ComputeSize for FeatureRecord {
    #[allow(clippy::needless_question_mark)]
    fn compute_size(args: &u16) -> Result<usize, ReadError> {
        let max_entry_index = *args;
        let mut result = 0usize;
        result = result
            .checked_add(Tag::RAW_BYTE_LEN)
            .ok_or(ReadError::OutOfBounds)?;
        result = result
            .checked_add(<U8Or16 as ComputeSize>::compute_size(&max_entry_index)?)
            .ok_or(ReadError::OutOfBounds)?;
        result = result
            .checked_add(<U8Or16 as ComputeSize>::compute_size(&max_entry_index)?)
            .ok_or(ReadError::OutOfBounds)?;
        Ok(result)
    }
}

impl<'a> FontReadWithArgs<'a> for FeatureRecord {
    fn read_with_args(data: FontData<'a>, args: &u16) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        let max_entry_index = *args;
        Ok(Self {
            feature_tag: cursor.read_be()?,
            first_new_entry_index: cursor.read_with_args(&max_entry_index)?,
            entry_map_count: cursor.read_with_args(&max_entry_index)?,
        })
    }
}

impl<'a> FeatureRecord {
    /// A constructor that requires additional arguments.
    ///
    /// This type requires some external state in order to be
    /// parsed.
    pub fn read(data: FontData<'a>, max_entry_index: u16) -> Result<Self, ReadError> {
        let args = max_entry_index;
        Self::read_with_args(data, &args)
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeRecord<'a> for FeatureRecord {
    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
        RecordResolver {
            name: "FeatureRecord",
            get_field: Box::new(move |idx, _data| match idx {
                0usize => Some(Field::new("feature_tag", self.feature_tag())),
                1usize => Some(Field::new(
                    "first_new_entry_index",
                    traversal::FieldType::Unknown,
                )),
                2usize => Some(Field::new("entry_map_count", traversal::FieldType::Unknown)),
                _ => None,
            }),
            data,
        }
    }
}

#[derive(Clone, Debug)]
pub struct EntryMapRecord {
    pub first_entry_index: U8Or16,
    pub last_entry_index: U8Or16,
}

impl EntryMapRecord {
    pub fn first_entry_index(&self) -> &U8Or16 {
        &self.first_entry_index
    }

    pub fn last_entry_index(&self) -> &U8Or16 {
        &self.last_entry_index
    }
}

impl ReadArgs for EntryMapRecord {
    type Args = u16;
}

impl ComputeSize for EntryMapRecord {
    #[allow(clippy::needless_question_mark)]
    fn compute_size(args: &u16) -> Result<usize, ReadError> {
        let max_entry_index = *args;
        let mut result = 0usize;
        result = result
            .checked_add(<U8Or16 as ComputeSize>::compute_size(&max_entry_index)?)
            .ok_or(ReadError::OutOfBounds)?;
        result = result
            .checked_add(<U8Or16 as ComputeSize>::compute_size(&max_entry_index)?)
            .ok_or(ReadError::OutOfBounds)?;
        Ok(result)
    }
}

impl<'a> FontReadWithArgs<'a> for EntryMapRecord {
    fn read_with_args(data: FontData<'a>, args: &u16) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        let max_entry_index = *args;
        Ok(Self {
            first_entry_index: cursor.read_with_args(&max_entry_index)?,
            last_entry_index: cursor.read_with_args(&max_entry_index)?,
        })
    }
}

impl<'a> EntryMapRecord {
    /// A constructor that requires additional arguments.
    ///
    /// This type requires some external state in order to be
    /// parsed.
    pub fn read(data: FontData<'a>, max_entry_index: u16) -> Result<Self, ReadError> {
        let args = max_entry_index;
        Self::read_with_args(data, &args)
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeRecord<'a> for EntryMapRecord {
    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
        RecordResolver {
            name: "EntryMapRecord",
            get_field: Box::new(move |idx, _data| match idx {
                0usize => Some(Field::new(
                    "first_entry_index",
                    traversal::FieldType::Unknown,
                )),
                1usize => Some(Field::new(
                    "last_entry_index",
                    traversal::FieldType::Unknown,
                )),
                _ => None,
            }),
            data,
        }
    }
}

impl Format<u8> for PatchMapFormat2Marker {
    const FORMAT: u8 = 2;
}

/// [Patch Map Format Format 2](https://w3c.github.io/IFT/Overview.html#patch-map-format-2)
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct PatchMapFormat2Marker {
    uri_template_byte_len: usize,
}

impl PatchMapFormat2Marker {
    pub fn format_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + u8::RAW_BYTE_LEN
    }

    pub fn _reserved_byte_range(&self) -> Range<usize> {
        let start = self.format_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn compatibility_id_byte_range(&self) -> Range<usize> {
        let start = self._reserved_byte_range().end;
        start..start + CompatibilityId::RAW_BYTE_LEN
    }

    pub fn default_patch_encoding_byte_range(&self) -> Range<usize> {
        let start = self.compatibility_id_byte_range().end;
        start..start + u8::RAW_BYTE_LEN
    }

    pub fn entry_count_byte_range(&self) -> Range<usize> {
        let start = self.default_patch_encoding_byte_range().end;
        start..start + Uint24::RAW_BYTE_LEN
    }

    pub fn entries_offset_byte_range(&self) -> Range<usize> {
        let start = self.entry_count_byte_range().end;
        start..start + Offset32::RAW_BYTE_LEN
    }

    pub fn entry_id_string_data_offset_byte_range(&self) -> Range<usize> {
        let start = self.entries_offset_byte_range().end;
        start..start + Offset32::RAW_BYTE_LEN
    }

    pub fn uri_template_length_byte_range(&self) -> Range<usize> {
        let start = self.entry_id_string_data_offset_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }

    pub fn uri_template_byte_range(&self) -> Range<usize> {
        let start = self.uri_template_length_byte_range().end;
        start..start + self.uri_template_byte_len
    }
}

impl<'a> FontRead<'a> for PatchMapFormat2<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<u8>();
        cursor.advance::<u32>();
        cursor.advance::<CompatibilityId>();
        cursor.advance::<u8>();
        cursor.advance::<Uint24>();
        cursor.advance::<Offset32>();
        cursor.advance::<Offset32>();
        let uri_template_length: u16 = cursor.read()?;
        let uri_template_byte_len = (uri_template_length as usize)
            .checked_mul(u8::RAW_BYTE_LEN)
            .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(uri_template_byte_len);
        cursor.finish(PatchMapFormat2Marker {
            uri_template_byte_len,
        })
    }
}

/// [Patch Map Format Format 2](https://w3c.github.io/IFT/Overview.html#patch-map-format-2)
pub type PatchMapFormat2<'a> = TableRef<'a, PatchMapFormat2Marker>;

impl<'a> PatchMapFormat2<'a> {
    /// Format identifier: format = 2
    pub fn format(&self) -> u8 {
        let range = self.shape.format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Unique ID that identifies compatible patches.
    pub fn compatibility_id(&self) -> CompatibilityId {
        let range = self.shape.compatibility_id_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Patch format number for patches referenced by this mapping.
    pub fn default_patch_encoding(&self) -> u8 {
        let range = self.shape.default_patch_encoding_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn entry_count(&self) -> Uint24 {
        let range = self.shape.entry_count_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn entries_offset(&self) -> Offset32 {
        let range = self.shape.entries_offset_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Attempt to resolve [`entries_offset`][Self::entries_offset].
    pub fn entries(&self) -> Result<MappingEntries<'a>, ReadError> {
        let data = self.data;
        self.entries_offset().resolve(data)
    }

    pub fn entry_id_string_data_offset(&self) -> Nullable<Offset32> {
        let range = self.shape.entry_id_string_data_offset_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Attempt to resolve [`entry_id_string_data_offset`][Self::entry_id_string_data_offset].
    pub fn entry_id_string_data(&self) -> Option<Result<IdStringData<'a>, ReadError>> {
        let data = self.data;
        self.entry_id_string_data_offset().resolve(data)
    }

    pub fn uri_template_length(&self) -> u16 {
        let range = self.shape.uri_template_length_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn uri_template(&self) -> &'a [u8] {
        let range = self.shape.uri_template_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for PatchMapFormat2<'a> {
    fn type_name(&self) -> &str {
        "PatchMapFormat2"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("format", self.format())),
            1usize => Some(Field::new(
                "compatibility_id",
                traversal::FieldType::Unknown,
            )),
            2usize => Some(Field::new(
                "default_patch_encoding",
                self.default_patch_encoding(),
            )),
            3usize => Some(Field::new("entry_count", self.entry_count())),
            4usize => Some(Field::new(
                "entries_offset",
                FieldType::offset(self.entries_offset(), self.entries()),
            )),
            5usize => Some(Field::new(
                "entry_id_string_data_offset",
                FieldType::offset(
                    self.entry_id_string_data_offset(),
                    self.entry_id_string_data(),
                ),
            )),
            6usize => Some(Field::new(
                "uri_template_length",
                self.uri_template_length(),
            )),
            7usize => Some(Field::new("uri_template", self.uri_template())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for PatchMapFormat2<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct MappingEntriesMarker {
    entry_data_byte_len: usize,
}

impl MappingEntriesMarker {
    pub fn entry_data_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + self.entry_data_byte_len
    }
}

impl<'a> FontRead<'a> for MappingEntries<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        let entry_data_byte_len = cursor.remaining_bytes() / u8::RAW_BYTE_LEN * u8::RAW_BYTE_LEN;
        cursor.advance_by(entry_data_byte_len);
        cursor.finish(MappingEntriesMarker {
            entry_data_byte_len,
        })
    }
}

pub type MappingEntries<'a> = TableRef<'a, MappingEntriesMarker>;

impl<'a> MappingEntries<'a> {
    pub fn entry_data(&self) -> &'a [u8] {
        let range = self.shape.entry_data_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for MappingEntries<'a> {
    fn type_name(&self) -> &str {
        "MappingEntries"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("entry_data", self.entry_data())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for MappingEntries<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct EntryDataMarker {
    entry_id_string_data_offset: Offset32,
    feature_count_byte_start: Option<usize>,
    feature_tags_byte_start: Option<usize>,
    feature_tags_byte_len: Option<usize>,
    design_space_count_byte_start: Option<usize>,
    design_space_segments_byte_start: Option<usize>,
    design_space_segments_byte_len: Option<usize>,
    copy_count_byte_start: Option<usize>,
    copy_indices_byte_start: Option<usize>,
    copy_indices_byte_len: Option<usize>,
    entry_id_delta_byte_start: Option<usize>,
    entry_id_delta_byte_len: Option<usize>,
    patch_encoding_byte_start: Option<usize>,
    codepoint_data_byte_len: usize,
}

impl EntryDataMarker {
    pub fn format_flags_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + EntryFormatFlags::RAW_BYTE_LEN
    }

    pub fn feature_count_byte_range(&self) -> Option<Range<usize>> {
        let start = self.feature_count_byte_start?;
        Some(start..start + u8::RAW_BYTE_LEN)
    }

    pub fn feature_tags_byte_range(&self) -> Option<Range<usize>> {
        let start = self.feature_tags_byte_start?;
        Some(start..start + self.feature_tags_byte_len?)
    }

    pub fn design_space_count_byte_range(&self) -> Option<Range<usize>> {
        let start = self.design_space_count_byte_start?;
        Some(start..start + u16::RAW_BYTE_LEN)
    }

    pub fn design_space_segments_byte_range(&self) -> Option<Range<usize>> {
        let start = self.design_space_segments_byte_start?;
        Some(start..start + self.design_space_segments_byte_len?)
    }

    pub fn copy_count_byte_range(&self) -> Option<Range<usize>> {
        let start = self.copy_count_byte_start?;
        Some(start..start + u8::RAW_BYTE_LEN)
    }

    pub fn copy_indices_byte_range(&self) -> Option<Range<usize>> {
        let start = self.copy_indices_byte_start?;
        Some(start..start + self.copy_indices_byte_len?)
    }

    pub fn entry_id_delta_byte_range(&self) -> Option<Range<usize>> {
        let start = self.entry_id_delta_byte_start?;
        Some(start..start + self.entry_id_delta_byte_len?)
    }

    pub fn patch_encoding_byte_range(&self) -> Option<Range<usize>> {
        let start = self.patch_encoding_byte_start?;
        Some(start..start + u8::RAW_BYTE_LEN)
    }

    pub fn codepoint_data_byte_range(&self) -> Range<usize> {
        let start = self . patch_encoding_byte_range () . map (| range | range . end) . unwrap_or_else (|| self . entry_id_delta_byte_range () . map (| range | range . end) . unwrap_or_else (|| self . copy_indices_byte_range () . map (| range | range . end) . unwrap_or_else (|| self . copy_count_byte_range () . map (| range | range . end) . unwrap_or_else (|| self . design_space_segments_byte_range () . map (| range | range . end) . unwrap_or_else (|| self . design_space_count_byte_range () . map (| range | range . end) . unwrap_or_else (|| self . feature_tags_byte_range () . map (| range | range . end) . unwrap_or_else (|| self . feature_count_byte_range () . map (| range | range . end) . unwrap_or_else (|| self . format_flags_byte_range () . end)))))))) ;
        start..start + self.codepoint_data_byte_len
    }
}

impl ReadArgs for EntryData<'_> {
    type Args = Offset32;
}

impl<'a> FontReadWithArgs<'a> for EntryData<'a> {
    fn read_with_args(data: FontData<'a>, args: &Offset32) -> Result<Self, ReadError> {
        let entry_id_string_data_offset = *args;
        let mut cursor = data.cursor();
        let format_flags: EntryFormatFlags = cursor.read()?;
        let feature_count_byte_start = format_flags
            .contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE)
            .then(|| cursor.position())
            .transpose()?;
        let feature_count = format_flags
            .contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE)
            .then(|| cursor.read::<u8>())
            .transpose()?
            .unwrap_or(0);
        let feature_tags_byte_start = format_flags
            .contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE)
            .then(|| cursor.position())
            .transpose()?;
        let feature_tags_byte_len = format_flags
            .contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE)
            .then_some(
                (feature_count as usize)
                    .checked_mul(Tag::RAW_BYTE_LEN)
                    .ok_or(ReadError::OutOfBounds)?,
            );
        if let Some(value) = feature_tags_byte_len {
            cursor.advance_by(value);
        }
        let design_space_count_byte_start = format_flags
            .contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE)
            .then(|| cursor.position())
            .transpose()?;
        let design_space_count = format_flags
            .contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE)
            .then(|| cursor.read::<u16>())
            .transpose()?
            .unwrap_or(0);
        let design_space_segments_byte_start = format_flags
            .contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE)
            .then(|| cursor.position())
            .transpose()?;
        let design_space_segments_byte_len = format_flags
            .contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE)
            .then_some(
                (design_space_count as usize)
                    .checked_mul(DesignSpaceSegment::RAW_BYTE_LEN)
                    .ok_or(ReadError::OutOfBounds)?,
            );
        if let Some(value) = design_space_segments_byte_len {
            cursor.advance_by(value);
        }
        let copy_count_byte_start = format_flags
            .contains(EntryFormatFlags::COPY_INDICES)
            .then(|| cursor.position())
            .transpose()?;
        let copy_count = format_flags
            .contains(EntryFormatFlags::COPY_INDICES)
            .then(|| cursor.read::<u8>())
            .transpose()?
            .unwrap_or(0);
        let copy_indices_byte_start = format_flags
            .contains(EntryFormatFlags::COPY_INDICES)
            .then(|| cursor.position())
            .transpose()?;
        let copy_indices_byte_len = format_flags
            .contains(EntryFormatFlags::COPY_INDICES)
            .then_some(
                (copy_count as usize)
                    .checked_mul(Uint24::RAW_BYTE_LEN)
                    .ok_or(ReadError::OutOfBounds)?,
            );
        if let Some(value) = copy_indices_byte_len {
            cursor.advance_by(value);
        }
        let entry_id_delta_byte_start = format_flags
            .contains(EntryFormatFlags::ENTRY_ID_DELTA)
            .then(|| cursor.position())
            .transpose()?;
        let entry_id_delta_byte_len = format_flags
            .contains(EntryFormatFlags::ENTRY_ID_DELTA)
            .then_some(<IdDeltaOrLength as ComputeSize>::compute_size(
                &entry_id_string_data_offset,
            )?);
        if let Some(value) = entry_id_delta_byte_len {
            cursor.advance_by(value);
        }
        let patch_encoding_byte_start = format_flags
            .contains(EntryFormatFlags::PATCH_ENCODING)
            .then(|| cursor.position())
            .transpose()?;
        format_flags
            .contains(EntryFormatFlags::PATCH_ENCODING)
            .then(|| cursor.advance::<u8>());
        let codepoint_data_byte_len =
            cursor.remaining_bytes() / u8::RAW_BYTE_LEN * u8::RAW_BYTE_LEN;
        cursor.advance_by(codepoint_data_byte_len);
        cursor.finish(EntryDataMarker {
            entry_id_string_data_offset,
            feature_count_byte_start,
            feature_tags_byte_start,
            feature_tags_byte_len,
            design_space_count_byte_start,
            design_space_segments_byte_start,
            design_space_segments_byte_len,
            copy_count_byte_start,
            copy_indices_byte_start,
            copy_indices_byte_len,
            entry_id_delta_byte_start,
            entry_id_delta_byte_len,
            patch_encoding_byte_start,
            codepoint_data_byte_len,
        })
    }
}

impl<'a> EntryData<'a> {
    /// A constructor that requires additional arguments.
    ///
    /// This type requires some external state in order to be
    /// parsed.
    pub fn read(
        data: FontData<'a>,
        entry_id_string_data_offset: Offset32,
    ) -> Result<Self, ReadError> {
        let args = entry_id_string_data_offset;
        Self::read_with_args(data, &args)
    }
}

pub type EntryData<'a> = TableRef<'a, EntryDataMarker>;

impl<'a> EntryData<'a> {
    pub fn format_flags(&self) -> EntryFormatFlags {
        let range = self.shape.format_flags_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn feature_count(&self) -> Option<u8> {
        let range = self.shape.feature_count_byte_range()?;
        Some(self.data.read_at(range.start).unwrap())
    }

    pub fn feature_tags(&self) -> Option<&'a [BigEndian<Tag>]> {
        let range = self.shape.feature_tags_byte_range()?;
        Some(self.data.read_array(range).unwrap())
    }

    pub fn design_space_count(&self) -> Option<u16> {
        let range = self.shape.design_space_count_byte_range()?;
        Some(self.data.read_at(range.start).unwrap())
    }

    pub fn design_space_segments(&self) -> Option<&'a [DesignSpaceSegment]> {
        let range = self.shape.design_space_segments_byte_range()?;
        Some(self.data.read_array(range).unwrap())
    }

    pub fn copy_count(&self) -> Option<u8> {
        let range = self.shape.copy_count_byte_range()?;
        Some(self.data.read_at(range.start).unwrap())
    }

    pub fn copy_indices(&self) -> Option<&'a [BigEndian<Uint24>]> {
        let range = self.shape.copy_indices_byte_range()?;
        Some(self.data.read_array(range).unwrap())
    }

    pub fn entry_id_delta(&self) -> Option<IdDeltaOrLength> {
        let range = self.shape.entry_id_delta_byte_range()?;
        Some(
            self.data
                .read_with_args(range, &self.entry_id_string_data_offset())
                .unwrap(),
        )
    }

    pub fn patch_encoding(&self) -> Option<u8> {
        let range = self.shape.patch_encoding_byte_range()?;
        Some(self.data.read_at(range.start).unwrap())
    }

    pub fn codepoint_data(&self) -> &'a [u8] {
        let range = self.shape.codepoint_data_byte_range();
        self.data.read_array(range).unwrap()
    }

    pub(crate) fn entry_id_string_data_offset(&self) -> Offset32 {
        self.shape.entry_id_string_data_offset
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for EntryData<'a> {
    fn type_name(&self) -> &str {
        "EntryData"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        let format_flags = self.format_flags();
        match idx {
            0usize => Some(Field::new("format_flags", self.format_flags())),
            1usize if format_flags.contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE) => {
                Some(Field::new("feature_count", self.feature_count().unwrap()))
            }
            2usize if format_flags.contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE) => {
                Some(Field::new("feature_tags", self.feature_tags().unwrap()))
            }
            3usize if format_flags.contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE) => Some(
                Field::new("design_space_count", self.design_space_count().unwrap()),
            ),
            4usize if format_flags.contains(EntryFormatFlags::FEATURES_AND_DESIGN_SPACE) => {
                Some(Field::new(
                    "design_space_segments",
                    traversal::FieldType::array_of_records(
                        stringify!(DesignSpaceSegment),
                        self.design_space_segments().unwrap(),
                        self.offset_data(),
                    ),
                ))
            }
            5usize if format_flags.contains(EntryFormatFlags::COPY_INDICES) => {
                Some(Field::new("copy_count", self.copy_count().unwrap()))
            }
            6usize if format_flags.contains(EntryFormatFlags::COPY_INDICES) => {
                Some(Field::new("copy_indices", self.copy_indices().unwrap()))
            }
            7usize if format_flags.contains(EntryFormatFlags::ENTRY_ID_DELTA) => {
                Some(Field::new("entry_id_delta", traversal::FieldType::Unknown))
            }
            8usize if format_flags.contains(EntryFormatFlags::PATCH_ENCODING) => {
                Some(Field::new("patch_encoding", self.patch_encoding().unwrap()))
            }
            9usize => Some(Field::new("codepoint_data", self.codepoint_data())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for EntryData<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

#[derive(Clone, Copy, Default, PartialEq, Eq, PartialOrd, Ord, Hash, bytemuck :: AnyBitPattern)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[repr(transparent)]
pub struct EntryFormatFlags {
    bits: u8,
}

impl EntryFormatFlags {
    pub const FEATURES_AND_DESIGN_SPACE: Self = Self { bits: 0b00000001 };

    pub const COPY_INDICES: Self = Self { bits: 0b00000010 };

    pub const ENTRY_ID_DELTA: Self = Self { bits: 0b00000100 };

    pub const PATCH_ENCODING: Self = Self { bits: 0b00001000 };

    pub const CODEPOINTS_BIT_1: Self = Self { bits: 0b00010000 };

    pub const CODEPOINTS_BIT_2: Self = Self { bits: 0b00100000 };

    pub const IGNORED: Self = Self { bits: 0b01000000 };

    pub const RESERVED: Self = Self { bits: 0b10000000 };
}

impl EntryFormatFlags {
    ///  Returns an empty set of flags.
    #[inline]
    pub const fn empty() -> Self {
        Self { bits: 0 }
    }

    /// Returns the set containing all flags.
    #[inline]
    pub const fn all() -> Self {
        Self {
            bits: Self::FEATURES_AND_DESIGN_SPACE.bits
                | Self::COPY_INDICES.bits
                | Self::ENTRY_ID_DELTA.bits
                | Self::PATCH_ENCODING.bits
                | Self::CODEPOINTS_BIT_1.bits
                | Self::CODEPOINTS_BIT_2.bits
                | Self::IGNORED.bits
                | Self::RESERVED.bits,
        }
    }

    /// Returns the raw value of the flags currently stored.
    #[inline]
    pub const fn bits(&self) -> u8 {
        self.bits
    }

    /// Convert from underlying bit representation, unless that
    /// representation contains bits that do not correspond to a flag.
    #[inline]
    pub const fn from_bits(bits: u8) -> Option<Self> {
        if (bits & !Self::all().bits()) == 0 {
            Some(Self { bits })
        } else {
            None
        }
    }

    /// Convert from underlying bit representation, dropping any bits
    /// that do not correspond to flags.
    #[inline]
    pub const fn from_bits_truncate(bits: u8) -> Self {
        Self {
            bits: bits & Self::all().bits,
        }
    }

    /// Returns `true` if no flags are currently stored.
    #[inline]
    pub const fn is_empty(&self) -> bool {
        self.bits() == Self::empty().bits()
    }

    /// Returns `true` if there are flags common to both `self` and `other`.
    #[inline]
    pub const fn intersects(&self, other: Self) -> bool {
        !(Self {
            bits: self.bits & other.bits,
        })
        .is_empty()
    }

    /// Returns `true` if all of the flags in `other` are contained within `self`.
    #[inline]
    pub const fn contains(&self, other: Self) -> bool {
        (self.bits & other.bits) == other.bits
    }

    /// Inserts the specified flags in-place.
    #[inline]
    pub fn insert(&mut self, other: Self) {
        self.bits |= other.bits;
    }

    /// Removes the specified flags in-place.
    #[inline]
    pub fn remove(&mut self, other: Self) {
        self.bits &= !other.bits;
    }

    /// Toggles the specified flags in-place.
    #[inline]
    pub fn toggle(&mut self, other: Self) {
        self.bits ^= other.bits;
    }

    /// Returns the intersection between the flags in `self` and
    /// `other`.
    ///
    /// Specifically, the returned set contains only the flags which are
    /// present in *both* `self` *and* `other`.
    ///
    /// This is equivalent to using the `&` operator (e.g.
    /// [`ops::BitAnd`]), as in `flags & other`.
    ///
    /// [`ops::BitAnd`]: https://doc.rust-lang.org/std/ops/trait.BitAnd.html
    #[inline]
    #[must_use]
    pub const fn intersection(self, other: Self) -> Self {
        Self {
            bits: self.bits & other.bits,
        }
    }

    /// Returns the union of between the flags in `self` and `other`.
    ///
    /// Specifically, the returned set contains all flags which are
    /// present in *either* `self` *or* `other`, including any which are
    /// present in both.
    ///
    /// This is equivalent to using the `|` operator (e.g.
    /// [`ops::BitOr`]), as in `flags | other`.
    ///
    /// [`ops::BitOr`]: https://doc.rust-lang.org/std/ops/trait.BitOr.html
    #[inline]
    #[must_use]
    pub const fn union(self, other: Self) -> Self {
        Self {
            bits: self.bits | other.bits,
        }
    }

    /// Returns the difference between the flags in `self` and `other`.
    ///
    /// Specifically, the returned set contains all flags present in
    /// `self`, except for the ones present in `other`.
    ///
    /// It is also conceptually equivalent to the "bit-clear" operation:
    /// `flags & !other` (and this syntax is also supported).
    ///
    /// This is equivalent to using the `-` operator (e.g.
    /// [`ops::Sub`]), as in `flags - other`.
    ///
    /// [`ops::Sub`]: https://doc.rust-lang.org/std/ops/trait.Sub.html
    #[inline]
    #[must_use]
    pub const fn difference(self, other: Self) -> Self {
        Self {
            bits: self.bits & !other.bits,
        }
    }
}

impl std::ops::BitOr for EntryFormatFlags {
    type Output = Self;

    /// Returns the union of the two sets of flags.
    #[inline]
    fn bitor(self, other: EntryFormatFlags) -> Self {
        Self {
            bits: self.bits | other.bits,
        }
    }
}

impl std::ops::BitOrAssign for EntryFormatFlags {
    /// Adds the set of flags.
    #[inline]
    fn bitor_assign(&mut self, other: Self) {
        self.bits |= other.bits;
    }
}

impl std::ops::BitXor for EntryFormatFlags {
    type Output = Self;

    /// Returns the left flags, but with all the right flags toggled.
    #[inline]
    fn bitxor(self, other: Self) -> Self {
        Self {
            bits: self.bits ^ other.bits,
        }
    }
}

impl std::ops::BitXorAssign for EntryFormatFlags {
    /// Toggles the set of flags.
    #[inline]
    fn bitxor_assign(&mut self, other: Self) {
        self.bits ^= other.bits;
    }
}

impl std::ops::BitAnd for EntryFormatFlags {
    type Output = Self;

    /// Returns the intersection between the two sets of flags.
    #[inline]
    fn bitand(self, other: Self) -> Self {
        Self {
            bits: self.bits & other.bits,
        }
    }
}

impl std::ops::BitAndAssign for EntryFormatFlags {
    /// Disables all flags disabled in the set.
    #[inline]
    fn bitand_assign(&mut self, other: Self) {
        self.bits &= other.bits;
    }
}

impl std::ops::Sub for EntryFormatFlags {
    type Output = Self;

    /// Returns the set difference of the two sets of flags.
    #[inline]
    fn sub(self, other: Self) -> Self {
        Self {
            bits: self.bits & !other.bits,
        }
    }
}

impl std::ops::SubAssign for EntryFormatFlags {
    /// Disables all flags enabled in the set.
    #[inline]
    fn sub_assign(&mut self, other: Self) {
        self.bits &= !other.bits;
    }
}

impl std::ops::Not for EntryFormatFlags {
    type Output = Self;

    /// Returns the complement of this set of flags.
    #[inline]
    fn not(self) -> Self {
        Self { bits: !self.bits } & Self::all()
    }
}

impl std::fmt::Debug for EntryFormatFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        let members: &[(&str, Self)] = &[
            ("FEATURES_AND_DESIGN_SPACE", Self::FEATURES_AND_DESIGN_SPACE),
            ("COPY_INDICES", Self::COPY_INDICES),
            ("ENTRY_ID_DELTA", Self::ENTRY_ID_DELTA),
            ("PATCH_ENCODING", Self::PATCH_ENCODING),
            ("CODEPOINTS_BIT_1", Self::CODEPOINTS_BIT_1),
            ("CODEPOINTS_BIT_2", Self::CODEPOINTS_BIT_2),
            ("IGNORED", Self::IGNORED),
            ("RESERVED", Self::RESERVED),
        ];
        let mut first = true;
        for (name, value) in members {
            if self.contains(*value) {
                if !first {
                    f.write_str(" | ")?;
                }
                first = false;
                f.write_str(name)?;
            }
        }
        if first {
            f.write_str("(empty)")?;
        }
        Ok(())
    }
}

impl std::fmt::Binary for EntryFormatFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::Binary::fmt(&self.bits, f)
    }
}

impl std::fmt::Octal for EntryFormatFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::Octal::fmt(&self.bits, f)
    }
}

impl std::fmt::LowerHex for EntryFormatFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::LowerHex::fmt(&self.bits, f)
    }
}

impl std::fmt::UpperHex for EntryFormatFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::UpperHex::fmt(&self.bits, f)
    }
}

impl font_types::Scalar for EntryFormatFlags {
    type Raw = <u8 as font_types::Scalar>::Raw;
    fn to_raw(self) -> Self::Raw {
        self.bits().to_raw()
    }
    fn from_raw(raw: Self::Raw) -> Self {
        let t = <u8>::from_raw(raw);
        Self::from_bits_truncate(t)
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> From<EntryFormatFlags> for FieldType<'a> {
    fn from(src: EntryFormatFlags) -> FieldType<'a> {
        src.bits().into()
    }
}

#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
#[repr(C)]
#[repr(packed)]
pub struct DesignSpaceSegment {
    pub axis_tag: BigEndian<Tag>,
    pub start: BigEndian<Fixed>,
    pub end: BigEndian<Fixed>,
}

impl DesignSpaceSegment {
    pub fn axis_tag(&self) -> Tag {
        self.axis_tag.get()
    }

    pub fn start(&self) -> Fixed {
        self.start.get()
    }

    pub fn end(&self) -> Fixed {
        self.end.get()
    }
}

impl FixedSize for DesignSpaceSegment {
    const RAW_BYTE_LEN: usize = Tag::RAW_BYTE_LEN + Fixed::RAW_BYTE_LEN + Fixed::RAW_BYTE_LEN;
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeRecord<'a> for DesignSpaceSegment {
    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
        RecordResolver {
            name: "DesignSpaceSegment",
            get_field: Box::new(move |idx, _data| match idx {
                0usize => Some(Field::new("axis_tag", self.axis_tag())),
                1usize => Some(Field::new("start", self.start())),
                2usize => Some(Field::new("end", self.end())),
                _ => None,
            }),
            data,
        }
    }
}

#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct IdStringDataMarker {
    id_data_byte_len: usize,
}

impl IdStringDataMarker {
    pub fn id_data_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + self.id_data_byte_len
    }
}

impl<'a> FontRead<'a> for IdStringData<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        let id_data_byte_len = cursor.remaining_bytes() / u8::RAW_BYTE_LEN * u8::RAW_BYTE_LEN;
        cursor.advance_by(id_data_byte_len);
        cursor.finish(IdStringDataMarker { id_data_byte_len })
    }
}

pub type IdStringData<'a> = TableRef<'a, IdStringDataMarker>;

impl<'a> IdStringData<'a> {
    pub fn id_data(&self) -> &'a [u8] {
        let range = self.shape.id_data_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for IdStringData<'a> {
    fn type_name(&self) -> &str {
        "IdStringData"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("id_data", self.id_data())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for IdStringData<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

/// [Table Keyed Patch](https://w3c.github.io/IFT/Overview.html#table-keyed)
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct TableKeyedPatchMarker {
    patch_offsets_byte_len: usize,
}

impl TableKeyedPatchMarker {
    pub fn format_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + Tag::RAW_BYTE_LEN
    }

    pub fn _reserved_byte_range(&self) -> Range<usize> {
        let start = self.format_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn compatibility_id_byte_range(&self) -> Range<usize> {
        let start = self._reserved_byte_range().end;
        start..start + CompatibilityId::RAW_BYTE_LEN
    }

    pub fn patches_count_byte_range(&self) -> Range<usize> {
        let start = self.compatibility_id_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }

    pub fn patch_offsets_byte_range(&self) -> Range<usize> {
        let start = self.patches_count_byte_range().end;
        start..start + self.patch_offsets_byte_len
    }
}

impl<'a> FontRead<'a> for TableKeyedPatch<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<Tag>();
        cursor.advance::<u32>();
        cursor.advance::<CompatibilityId>();
        let patches_count: u16 = cursor.read()?;
        let patch_offsets_byte_len = (transforms::add(patches_count, 1_usize))
            .checked_mul(Offset32::RAW_BYTE_LEN)
            .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(patch_offsets_byte_len);
        cursor.finish(TableKeyedPatchMarker {
            patch_offsets_byte_len,
        })
    }
}

/// [Table Keyed Patch](https://w3c.github.io/IFT/Overview.html#table-keyed)
pub type TableKeyedPatch<'a> = TableRef<'a, TableKeyedPatchMarker>;

impl<'a> TableKeyedPatch<'a> {
    pub fn format(&self) -> Tag {
        let range = self.shape.format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Unique ID that identifies compatible patches.
    pub fn compatibility_id(&self) -> CompatibilityId {
        let range = self.shape.compatibility_id_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn patches_count(&self) -> u16 {
        let range = self.shape.patches_count_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn patch_offsets(&self) -> &'a [BigEndian<Offset32>] {
        let range = self.shape.patch_offsets_byte_range();
        self.data.read_array(range).unwrap()
    }

    /// A dynamically resolving wrapper for [`patch_offsets`][Self::patch_offsets].
    pub fn patches(&self) -> ArrayOfOffsets<'a, TablePatch<'a>, Offset32> {
        let data = self.data;
        let offsets = self.patch_offsets();
        ArrayOfOffsets::new(offsets, data, ())
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for TableKeyedPatch<'a> {
    fn type_name(&self) -> &str {
        "TableKeyedPatch"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("format", self.format())),
            1usize => Some(Field::new(
                "compatibility_id",
                traversal::FieldType::Unknown,
            )),
            2usize => Some(Field::new("patches_count", self.patches_count())),
            3usize => Some({
                let data = self.data;
                Field::new(
                    "patch_offsets",
                    FieldType::array_of_offsets(
                        better_type_name::<TablePatch>(),
                        self.patch_offsets(),
                        move |off| {
                            let target = off.get().resolve::<TablePatch>(data);
                            FieldType::offset(off.get(), target)
                        },
                    ),
                )
            }),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for TableKeyedPatch<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

/// [TablePatch](https://w3c.github.io/IFT/Overview.html#tablepatch)
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct TablePatchMarker {
    brotli_stream_byte_len: usize,
}

impl TablePatchMarker {
    pub fn tag_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + Tag::RAW_BYTE_LEN
    }

    pub fn flags_byte_range(&self) -> Range<usize> {
        let start = self.tag_byte_range().end;
        start..start + TablePatchFlags::RAW_BYTE_LEN
    }

    pub fn max_uncompressed_length_byte_range(&self) -> Range<usize> {
        let start = self.flags_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn brotli_stream_byte_range(&self) -> Range<usize> {
        let start = self.max_uncompressed_length_byte_range().end;
        start..start + self.brotli_stream_byte_len
    }
}

impl<'a> FontRead<'a> for TablePatch<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<Tag>();
        cursor.advance::<TablePatchFlags>();
        cursor.advance::<u32>();
        let brotli_stream_byte_len = cursor.remaining_bytes() / u8::RAW_BYTE_LEN * u8::RAW_BYTE_LEN;
        cursor.advance_by(brotli_stream_byte_len);
        cursor.finish(TablePatchMarker {
            brotli_stream_byte_len,
        })
    }
}

/// [TablePatch](https://w3c.github.io/IFT/Overview.html#tablepatch)
pub type TablePatch<'a> = TableRef<'a, TablePatchMarker>;

impl<'a> TablePatch<'a> {
    pub fn tag(&self) -> Tag {
        let range = self.shape.tag_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn flags(&self) -> TablePatchFlags {
        let range = self.shape.flags_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn max_uncompressed_length(&self) -> u32 {
        let range = self.shape.max_uncompressed_length_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn brotli_stream(&self) -> &'a [u8] {
        let range = self.shape.brotli_stream_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for TablePatch<'a> {
    fn type_name(&self) -> &str {
        "TablePatch"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("tag", self.tag())),
            1usize => Some(Field::new("flags", self.flags())),
            2usize => Some(Field::new(
                "max_uncompressed_length",
                self.max_uncompressed_length(),
            )),
            3usize => Some(Field::new("brotli_stream", self.brotli_stream())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for TablePatch<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

#[derive(Clone, Copy, Default, PartialEq, Eq, PartialOrd, Ord, Hash, bytemuck :: AnyBitPattern)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[repr(transparent)]
pub struct TablePatchFlags {
    bits: u8,
}

impl TablePatchFlags {
    pub const REPLACE_TABLE: Self = Self { bits: 0b01 };

    pub const DROP_TABLE: Self = Self { bits: 0b10 };
}

impl TablePatchFlags {
    ///  Returns an empty set of flags.
    #[inline]
    pub const fn empty() -> Self {
        Self { bits: 0 }
    }

    /// Returns the set containing all flags.
    #[inline]
    pub const fn all() -> Self {
        Self {
            bits: Self::REPLACE_TABLE.bits | Self::DROP_TABLE.bits,
        }
    }

    /// Returns the raw value of the flags currently stored.
    #[inline]
    pub const fn bits(&self) -> u8 {
        self.bits
    }

    /// Convert from underlying bit representation, unless that
    /// representation contains bits that do not correspond to a flag.
    #[inline]
    pub const fn from_bits(bits: u8) -> Option<Self> {
        if (bits & !Self::all().bits()) == 0 {
            Some(Self { bits })
        } else {
            None
        }
    }

    /// Convert from underlying bit representation, dropping any bits
    /// that do not correspond to flags.
    #[inline]
    pub const fn from_bits_truncate(bits: u8) -> Self {
        Self {
            bits: bits & Self::all().bits,
        }
    }

    /// Returns `true` if no flags are currently stored.
    #[inline]
    pub const fn is_empty(&self) -> bool {
        self.bits() == Self::empty().bits()
    }

    /// Returns `true` if there are flags common to both `self` and `other`.
    #[inline]
    pub const fn intersects(&self, other: Self) -> bool {
        !(Self {
            bits: self.bits & other.bits,
        })
        .is_empty()
    }

    /// Returns `true` if all of the flags in `other` are contained within `self`.
    #[inline]
    pub const fn contains(&self, other: Self) -> bool {
        (self.bits & other.bits) == other.bits
    }

    /// Inserts the specified flags in-place.
    #[inline]
    pub fn insert(&mut self, other: Self) {
        self.bits |= other.bits;
    }

    /// Removes the specified flags in-place.
    #[inline]
    pub fn remove(&mut self, other: Self) {
        self.bits &= !other.bits;
    }

    /// Toggles the specified flags in-place.
    #[inline]
    pub fn toggle(&mut self, other: Self) {
        self.bits ^= other.bits;
    }

    /// Returns the intersection between the flags in `self` and
    /// `other`.
    ///
    /// Specifically, the returned set contains only the flags which are
    /// present in *both* `self` *and* `other`.
    ///
    /// This is equivalent to using the `&` operator (e.g.
    /// [`ops::BitAnd`]), as in `flags & other`.
    ///
    /// [`ops::BitAnd`]: https://doc.rust-lang.org/std/ops/trait.BitAnd.html
    #[inline]
    #[must_use]
    pub const fn intersection(self, other: Self) -> Self {
        Self {
            bits: self.bits & other.bits,
        }
    }

    /// Returns the union of between the flags in `self` and `other`.
    ///
    /// Specifically, the returned set contains all flags which are
    /// present in *either* `self` *or* `other`, including any which are
    /// present in both.
    ///
    /// This is equivalent to using the `|` operator (e.g.
    /// [`ops::BitOr`]), as in `flags | other`.
    ///
    /// [`ops::BitOr`]: https://doc.rust-lang.org/std/ops/trait.BitOr.html
    #[inline]
    #[must_use]
    pub const fn union(self, other: Self) -> Self {
        Self {
            bits: self.bits | other.bits,
        }
    }

    /// Returns the difference between the flags in `self` and `other`.
    ///
    /// Specifically, the returned set contains all flags present in
    /// `self`, except for the ones present in `other`.
    ///
    /// It is also conceptually equivalent to the "bit-clear" operation:
    /// `flags & !other` (and this syntax is also supported).
    ///
    /// This is equivalent to using the `-` operator (e.g.
    /// [`ops::Sub`]), as in `flags - other`.
    ///
    /// [`ops::Sub`]: https://doc.rust-lang.org/std/ops/trait.Sub.html
    #[inline]
    #[must_use]
    pub const fn difference(self, other: Self) -> Self {
        Self {
            bits: self.bits & !other.bits,
        }
    }
}

impl std::ops::BitOr for TablePatchFlags {
    type Output = Self;

    /// Returns the union of the two sets of flags.
    #[inline]
    fn bitor(self, other: TablePatchFlags) -> Self {
        Self {
            bits: self.bits | other.bits,
        }
    }
}

impl std::ops::BitOrAssign for TablePatchFlags {
    /// Adds the set of flags.
    #[inline]
    fn bitor_assign(&mut self, other: Self) {
        self.bits |= other.bits;
    }
}

impl std::ops::BitXor for TablePatchFlags {
    type Output = Self;

    /// Returns the left flags, but with all the right flags toggled.
    #[inline]
    fn bitxor(self, other: Self) -> Self {
        Self {
            bits: self.bits ^ other.bits,
        }
    }
}

impl std::ops::BitXorAssign for TablePatchFlags {
    /// Toggles the set of flags.
    #[inline]
    fn bitxor_assign(&mut self, other: Self) {
        self.bits ^= other.bits;
    }
}

impl std::ops::BitAnd for TablePatchFlags {
    type Output = Self;

    /// Returns the intersection between the two sets of flags.
    #[inline]
    fn bitand(self, other: Self) -> Self {
        Self {
            bits: self.bits & other.bits,
        }
    }
}

impl std::ops::BitAndAssign for TablePatchFlags {
    /// Disables all flags disabled in the set.
    #[inline]
    fn bitand_assign(&mut self, other: Self) {
        self.bits &= other.bits;
    }
}

impl std::ops::Sub for TablePatchFlags {
    type Output = Self;

    /// Returns the set difference of the two sets of flags.
    #[inline]
    fn sub(self, other: Self) -> Self {
        Self {
            bits: self.bits & !other.bits,
        }
    }
}

impl std::ops::SubAssign for TablePatchFlags {
    /// Disables all flags enabled in the set.
    #[inline]
    fn sub_assign(&mut self, other: Self) {
        self.bits &= !other.bits;
    }
}

impl std::ops::Not for TablePatchFlags {
    type Output = Self;

    /// Returns the complement of this set of flags.
    #[inline]
    fn not(self) -> Self {
        Self { bits: !self.bits } & Self::all()
    }
}

impl std::fmt::Debug for TablePatchFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        let members: &[(&str, Self)] = &[
            ("REPLACE_TABLE", Self::REPLACE_TABLE),
            ("DROP_TABLE", Self::DROP_TABLE),
        ];
        let mut first = true;
        for (name, value) in members {
            if self.contains(*value) {
                if !first {
                    f.write_str(" | ")?;
                }
                first = false;
                f.write_str(name)?;
            }
        }
        if first {
            f.write_str("(empty)")?;
        }
        Ok(())
    }
}

impl std::fmt::Binary for TablePatchFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::Binary::fmt(&self.bits, f)
    }
}

impl std::fmt::Octal for TablePatchFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::Octal::fmt(&self.bits, f)
    }
}

impl std::fmt::LowerHex for TablePatchFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::LowerHex::fmt(&self.bits, f)
    }
}

impl std::fmt::UpperHex for TablePatchFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::UpperHex::fmt(&self.bits, f)
    }
}

impl font_types::Scalar for TablePatchFlags {
    type Raw = <u8 as font_types::Scalar>::Raw;
    fn to_raw(self) -> Self::Raw {
        self.bits().to_raw()
    }
    fn from_raw(raw: Self::Raw) -> Self {
        let t = <u8>::from_raw(raw);
        Self::from_bits_truncate(t)
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> From<TablePatchFlags> for FieldType<'a> {
    fn from(src: TablePatchFlags) -> FieldType<'a> {
        src.bits().into()
    }
}

/// [Glyph Keyed Patch](https://w3c.github.io/IFT/Overview.html#glyph-keyed)
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct GlyphKeyedPatchMarker {
    brotli_stream_byte_len: usize,
}

impl GlyphKeyedPatchMarker {
    pub fn format_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + Tag::RAW_BYTE_LEN
    }

    pub fn _reserved_byte_range(&self) -> Range<usize> {
        let start = self.format_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn flags_byte_range(&self) -> Range<usize> {
        let start = self._reserved_byte_range().end;
        start..start + GlyphKeyedFlags::RAW_BYTE_LEN
    }

    pub fn compatibility_id_byte_range(&self) -> Range<usize> {
        let start = self.flags_byte_range().end;
        start..start + CompatibilityId::RAW_BYTE_LEN
    }

    pub fn max_uncompressed_length_byte_range(&self) -> Range<usize> {
        let start = self.compatibility_id_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn brotli_stream_byte_range(&self) -> Range<usize> {
        let start = self.max_uncompressed_length_byte_range().end;
        start..start + self.brotli_stream_byte_len
    }
}

impl<'a> FontRead<'a> for GlyphKeyedPatch<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<Tag>();
        cursor.advance::<u32>();
        cursor.advance::<GlyphKeyedFlags>();
        cursor.advance::<CompatibilityId>();
        cursor.advance::<u32>();
        let brotli_stream_byte_len = cursor.remaining_bytes() / u8::RAW_BYTE_LEN * u8::RAW_BYTE_LEN;
        cursor.advance_by(brotli_stream_byte_len);
        cursor.finish(GlyphKeyedPatchMarker {
            brotli_stream_byte_len,
        })
    }
}

/// [Glyph Keyed Patch](https://w3c.github.io/IFT/Overview.html#glyph-keyed)
pub type GlyphKeyedPatch<'a> = TableRef<'a, GlyphKeyedPatchMarker>;

impl<'a> GlyphKeyedPatch<'a> {
    pub fn format(&self) -> Tag {
        let range = self.shape.format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn flags(&self) -> GlyphKeyedFlags {
        let range = self.shape.flags_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn compatibility_id(&self) -> CompatibilityId {
        let range = self.shape.compatibility_id_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn max_uncompressed_length(&self) -> u32 {
        let range = self.shape.max_uncompressed_length_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn brotli_stream(&self) -> &'a [u8] {
        let range = self.shape.brotli_stream_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for GlyphKeyedPatch<'a> {
    fn type_name(&self) -> &str {
        "GlyphKeyedPatch"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("format", self.format())),
            1usize => Some(Field::new("flags", self.flags())),
            2usize => Some(Field::new(
                "compatibility_id",
                traversal::FieldType::Unknown,
            )),
            3usize => Some(Field::new(
                "max_uncompressed_length",
                self.max_uncompressed_length(),
            )),
            4usize => Some(Field::new("brotli_stream", self.brotli_stream())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for GlyphKeyedPatch<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

#[derive(Clone, Copy, Default, PartialEq, Eq, PartialOrd, Ord, Hash, bytemuck :: AnyBitPattern)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[repr(transparent)]
pub struct GlyphKeyedFlags {
    bits: u8,
}

impl GlyphKeyedFlags {
    pub const NONE: Self = Self { bits: 0b0 };

    pub const WIDE_GLYPH_IDS: Self = Self { bits: 0b1 };
}

impl GlyphKeyedFlags {
    ///  Returns an empty set of flags.
    #[inline]
    pub const fn empty() -> Self {
        Self { bits: 0 }
    }

    /// Returns the set containing all flags.
    #[inline]
    pub const fn all() -> Self {
        Self {
            bits: Self::NONE.bits | Self::WIDE_GLYPH_IDS.bits,
        }
    }

    /// Returns the raw value of the flags currently stored.
    #[inline]
    pub const fn bits(&self) -> u8 {
        self.bits
    }

    /// Convert from underlying bit representation, unless that
    /// representation contains bits that do not correspond to a flag.
    #[inline]
    pub const fn from_bits(bits: u8) -> Option<Self> {
        if (bits & !Self::all().bits()) == 0 {
            Some(Self { bits })
        } else {
            None
        }
    }

    /// Convert from underlying bit representation, dropping any bits
    /// that do not correspond to flags.
    #[inline]
    pub const fn from_bits_truncate(bits: u8) -> Self {
        Self {
            bits: bits & Self::all().bits,
        }
    }

    /// Returns `true` if no flags are currently stored.
    #[inline]
    pub const fn is_empty(&self) -> bool {
        self.bits() == Self::empty().bits()
    }

    /// Returns `true` if there are flags common to both `self` and `other`.
    #[inline]
    pub const fn intersects(&self, other: Self) -> bool {
        !(Self {
            bits: self.bits & other.bits,
        })
        .is_empty()
    }

    /// Returns `true` if all of the flags in `other` are contained within `self`.
    #[inline]
    pub const fn contains(&self, other: Self) -> bool {
        (self.bits & other.bits) == other.bits
    }

    /// Inserts the specified flags in-place.
    #[inline]
    pub fn insert(&mut self, other: Self) {
        self.bits |= other.bits;
    }

    /// Removes the specified flags in-place.
    #[inline]
    pub fn remove(&mut self, other: Self) {
        self.bits &= !other.bits;
    }

    /// Toggles the specified flags in-place.
    #[inline]
    pub fn toggle(&mut self, other: Self) {
        self.bits ^= other.bits;
    }

    /// Returns the intersection between the flags in `self` and
    /// `other`.
    ///
    /// Specifically, the returned set contains only the flags which are
    /// present in *both* `self` *and* `other`.
    ///
    /// This is equivalent to using the `&` operator (e.g.
    /// [`ops::BitAnd`]), as in `flags & other`.
    ///
    /// [`ops::BitAnd`]: https://doc.rust-lang.org/std/ops/trait.BitAnd.html
    #[inline]
    #[must_use]
    pub const fn intersection(self, other: Self) -> Self {
        Self {
            bits: self.bits & other.bits,
        }
    }

    /// Returns the union of between the flags in `self` and `other`.
    ///
    /// Specifically, the returned set contains all flags which are
    /// present in *either* `self` *or* `other`, including any which are
    /// present in both.
    ///
    /// This is equivalent to using the `|` operator (e.g.
    /// [`ops::BitOr`]), as in `flags | other`.
    ///
    /// [`ops::BitOr`]: https://doc.rust-lang.org/std/ops/trait.BitOr.html
    #[inline]
    #[must_use]
    pub const fn union(self, other: Self) -> Self {
        Self {
            bits: self.bits | other.bits,
        }
    }

    /// Returns the difference between the flags in `self` and `other`.
    ///
    /// Specifically, the returned set contains all flags present in
    /// `self`, except for the ones present in `other`.
    ///
    /// It is also conceptually equivalent to the "bit-clear" operation:
    /// `flags & !other` (and this syntax is also supported).
    ///
    /// This is equivalent to using the `-` operator (e.g.
    /// [`ops::Sub`]), as in `flags - other`.
    ///
    /// [`ops::Sub`]: https://doc.rust-lang.org/std/ops/trait.Sub.html
    #[inline]
    #[must_use]
    pub const fn difference(self, other: Self) -> Self {
        Self {
            bits: self.bits & !other.bits,
        }
    }
}

impl std::ops::BitOr for GlyphKeyedFlags {
    type Output = Self;

    /// Returns the union of the two sets of flags.
    #[inline]
    fn bitor(self, other: GlyphKeyedFlags) -> Self {
        Self {
            bits: self.bits | other.bits,
        }
    }
}

impl std::ops::BitOrAssign for GlyphKeyedFlags {
    /// Adds the set of flags.
    #[inline]
    fn bitor_assign(&mut self, other: Self) {
        self.bits |= other.bits;
    }
}

impl std::ops::BitXor for GlyphKeyedFlags {
    type Output = Self;

    /// Returns the left flags, but with all the right flags toggled.
    #[inline]
    fn bitxor(self, other: Self) -> Self {
        Self {
            bits: self.bits ^ other.bits,
        }
    }
}

impl std::ops::BitXorAssign for GlyphKeyedFlags {
    /// Toggles the set of flags.
    #[inline]
    fn bitxor_assign(&mut self, other: Self) {
        self.bits ^= other.bits;
    }
}

impl std::ops::BitAnd for GlyphKeyedFlags {
    type Output = Self;

    /// Returns the intersection between the two sets of flags.
    #[inline]
    fn bitand(self, other: Self) -> Self {
        Self {
            bits: self.bits & other.bits,
        }
    }
}

impl std::ops::BitAndAssign for GlyphKeyedFlags {
    /// Disables all flags disabled in the set.
    #[inline]
    fn bitand_assign(&mut self, other: Self) {
        self.bits &= other.bits;
    }
}

impl std::ops::Sub for GlyphKeyedFlags {
    type Output = Self;

    /// Returns the set difference of the two sets of flags.
    #[inline]
    fn sub(self, other: Self) -> Self {
        Self {
            bits: self.bits & !other.bits,
        }
    }
}

impl std::ops::SubAssign for GlyphKeyedFlags {
    /// Disables all flags enabled in the set.
    #[inline]
    fn sub_assign(&mut self, other: Self) {
        self.bits &= !other.bits;
    }
}

impl std::ops::Not for GlyphKeyedFlags {
    type Output = Self;

    /// Returns the complement of this set of flags.
    #[inline]
    fn not(self) -> Self {
        Self { bits: !self.bits } & Self::all()
    }
}

impl std::fmt::Debug for GlyphKeyedFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        let members: &[(&str, Self)] = &[
            ("NONE", Self::NONE),
            ("WIDE_GLYPH_IDS", Self::WIDE_GLYPH_IDS),
        ];
        let mut first = true;
        for (name, value) in members {
            if self.contains(*value) {
                if !first {
                    f.write_str(" | ")?;
                }
                first = false;
                f.write_str(name)?;
            }
        }
        if first {
            f.write_str("(empty)")?;
        }
        Ok(())
    }
}

impl std::fmt::Binary for GlyphKeyedFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::Binary::fmt(&self.bits, f)
    }
}

impl std::fmt::Octal for GlyphKeyedFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::Octal::fmt(&self.bits, f)
    }
}

impl std::fmt::LowerHex for GlyphKeyedFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::LowerHex::fmt(&self.bits, f)
    }
}

impl std::fmt::UpperHex for GlyphKeyedFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::UpperHex::fmt(&self.bits, f)
    }
}

impl font_types::Scalar for GlyphKeyedFlags {
    type Raw = <u8 as font_types::Scalar>::Raw;
    fn to_raw(self) -> Self::Raw {
        self.bits().to_raw()
    }
    fn from_raw(raw: Self::Raw) -> Self {
        let t = <u8>::from_raw(raw);
        Self::from_bits_truncate(t)
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> From<GlyphKeyedFlags> for FieldType<'a> {
    fn from(src: GlyphKeyedFlags) -> FieldType<'a> {
        src.bits().into()
    }
}

/// [GlyphPatches](https://w3c.github.io/IFT/Overview.html#glyphpatches)
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct GlyphPatchesMarker {
    flags: GlyphKeyedFlags,
    glyph_ids_byte_len: usize,
    tables_byte_len: usize,
    glyph_data_offsets_byte_len: usize,
}

impl GlyphPatchesMarker {
    pub fn glyph_count_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn table_count_byte_range(&self) -> Range<usize> {
        let start = self.glyph_count_byte_range().end;
        start..start + u8::RAW_BYTE_LEN
    }

    pub fn glyph_ids_byte_range(&self) -> Range<usize> {
        let start = self.table_count_byte_range().end;
        start..start + self.glyph_ids_byte_len
    }

    pub fn tables_byte_range(&self) -> Range<usize> {
        let start = self.glyph_ids_byte_range().end;
        start..start + self.tables_byte_len
    }

    pub fn glyph_data_offsets_byte_range(&self) -> Range<usize> {
        let start = self.tables_byte_range().end;
        start..start + self.glyph_data_offsets_byte_len
    }
}

impl ReadArgs for GlyphPatches<'_> {
    type Args = GlyphKeyedFlags;
}

impl<'a> FontReadWithArgs<'a> for GlyphPatches<'a> {
    fn read_with_args(data: FontData<'a>, args: &GlyphKeyedFlags) -> Result<Self, ReadError> {
        let flags = *args;
        let mut cursor = data.cursor();
        let glyph_count: u32 = cursor.read()?;
        let table_count: u8 = cursor.read()?;
        let glyph_ids_byte_len = (glyph_count as usize)
            .checked_mul(<U16Or24 as ComputeSize>::compute_size(&flags)?)
            .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(glyph_ids_byte_len);
        let tables_byte_len = (table_count as usize)
            .checked_mul(Tag::RAW_BYTE_LEN)
            .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(tables_byte_len);
        let glyph_data_offsets_byte_len =
            (transforms::multiply_add(glyph_count, table_count, 1_usize))
                .checked_mul(Offset32::RAW_BYTE_LEN)
                .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(glyph_data_offsets_byte_len);
        cursor.finish(GlyphPatchesMarker {
            flags,
            glyph_ids_byte_len,
            tables_byte_len,
            glyph_data_offsets_byte_len,
        })
    }
}

impl<'a> GlyphPatches<'a> {
    /// A constructor that requires additional arguments.
    ///
    /// This type requires some external state in order to be
    /// parsed.
    pub fn read(data: FontData<'a>, flags: GlyphKeyedFlags) -> Result<Self, ReadError> {
        let args = flags;
        Self::read_with_args(data, &args)
    }
}

/// [GlyphPatches](https://w3c.github.io/IFT/Overview.html#glyphpatches)
pub type GlyphPatches<'a> = TableRef<'a, GlyphPatchesMarker>;

impl<'a> GlyphPatches<'a> {
    pub fn glyph_count(&self) -> u32 {
        let range = self.shape.glyph_count_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn table_count(&self) -> u8 {
        let range = self.shape.table_count_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn glyph_ids(&self) -> ComputedArray<'a, U16Or24> {
        let range = self.shape.glyph_ids_byte_range();
        self.data.read_with_args(range, &self.flags()).unwrap()
    }

    pub fn tables(&self) -> &'a [BigEndian<Tag>] {
        let range = self.shape.tables_byte_range();
        self.data.read_array(range).unwrap()
    }

    pub fn glyph_data_offsets(&self) -> &'a [BigEndian<Offset32>] {
        let range = self.shape.glyph_data_offsets_byte_range();
        self.data.read_array(range).unwrap()
    }

    /// A dynamically resolving wrapper for [`glyph_data_offsets`][Self::glyph_data_offsets].
    pub fn glyph_data(&self) -> ArrayOfOffsets<'a, GlyphData<'a>, Offset32> {
        let data = self.data;
        let offsets = self.glyph_data_offsets();
        ArrayOfOffsets::new(offsets, data, ())
    }

    pub(crate) fn flags(&self) -> GlyphKeyedFlags {
        self.shape.flags
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for GlyphPatches<'a> {
    fn type_name(&self) -> &str {
        "GlyphPatches"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("glyph_count", self.glyph_count())),
            1usize => Some(Field::new("table_count", self.table_count())),
            2usize => Some(Field::new("glyph_ids", traversal::FieldType::Unknown)),
            3usize => Some(Field::new("tables", self.tables())),
            4usize => Some({
                let data = self.data;
                Field::new(
                    "glyph_data_offsets",
                    FieldType::array_of_offsets(
                        better_type_name::<GlyphData>(),
                        self.glyph_data_offsets(),
                        move |off| {
                            let target = off.get().resolve::<GlyphData>(data);
                            FieldType::offset(off.get(), target)
                        },
                    ),
                )
            }),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for GlyphPatches<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct GlyphDataMarker {
    data_byte_len: usize,
}

impl GlyphDataMarker {
    pub fn data_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + self.data_byte_len
    }
}

impl<'a> FontRead<'a> for GlyphData<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        let data_byte_len = cursor.remaining_bytes() / u8::RAW_BYTE_LEN * u8::RAW_BYTE_LEN;
        cursor.advance_by(data_byte_len);
        cursor.finish(GlyphDataMarker { data_byte_len })
    }
}

pub type GlyphData<'a> = TableRef<'a, GlyphDataMarker>;

impl<'a> GlyphData<'a> {
    pub fn data(&self) -> &'a [u8] {
        let range = self.shape.data_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for GlyphData<'a> {
    fn type_name(&self) -> &str {
        "GlyphData"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("data", self.data())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for GlyphData<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}