#!/usr/pkg/bin/python3.13 -i
#
# Copyright 2023-2026 The Khronos Group Inc.
#
# SPDX-License-Identifier: Apache-2.0

# Added in python 3.7 to allow for doing forward declaration of class names
from __future__ import annotations

from dataclasses import dataclass, field
from enum import Enum, auto

@dataclass
class FeatureRequirement:
    """Each instance of FeatureRequirement is one part of the AND operation,
       unless the struct/field are the same, then the depends are AND togethered"""
    struct: str
    field: str # Can have comma delimiter, which are expressed as OR
    depends: (str | None) # ex) "VK_EXT_descriptor_indexing", "VK_VERSION_1_2+VkPhysicalDeviceVulkan12Features::descriptorIndexing"

@dataclass
class Extension:
    """<extension>"""
    name: str # ex) VK_KHR_SURFACE
    nameString: str # macro with string, ex) VK_KHR_SURFACE_EXTENSION_NAME
    specVersion: str # macro with string, ex) VK_KHR_SURFACE_SPEC_VERSION
    specVersionValue: int # value of specVersion macro, ex) 25 for VK_KHR_surface

    # Only one will be True, the other is False
    instance: bool
    device: bool

    depends: (str | None)
    vendorTag: (str | None)  # ex) EXT, KHR, etc
    platform: (str | None)   # ex) android
    protect: (str | None)    # ex) VK_USE_PLATFORM_ANDROID_KHR
    provisional: bool
    promotedTo: (str | None) # ex) VK_VERSION_1_1
    deprecatedBy: (str | None)
    obsoletedBy: (str | None)
    specialUse: list[str]
    featureRequirement: list[FeatureRequirement]
    ratified: bool

    # These are here to allow for easy reverse lookups
    # To prevent infinite recursion, other classes reference a string back to the Extension class
    # Quotes allow us to forward declare the dataclass
    handles:  list['Handle']  = field(default_factory=list, init=False)
    commands: list['Command'] = field(default_factory=list, init=False)
    structs:  list['Struct']  = field(default_factory=list, init=False)
    enums:    list['Enum']    = field(default_factory=list, init=False)
    bitmasks: list['Bitmask'] = field(default_factory=list, init=False)
    flags:    list['Flags']   = field(default_factory=list, init=False)
    # Use the Enum name to see what fields are extended
    enumFields: dict[str, list['EnumField']] = field(default_factory=dict, init=False)
    # Use the Bitmask name to see what flag bits are added to it
    flagBits: dict[str, list['Flag']] = field(default_factory=dict, init=False)

@dataclass
class Version:
    """
    <feature> which represents a version
    This will NEVER be Version 1.0, since having 'no version' is same as being 1.0
    """
    name: str       # ex) VK_VERSION_1_1
    nameString: str # ex) "VK_VERSION_1_1" (no macro, so has quotes)
    nameApi: str    # ex) VK_API_VERSION_1_1

    featureRequirement: list[FeatureRequirement]

@dataclass
class Legacy:
    """<deprecate>
    For historical reasons, the XML tag is "deprecate" but we decided in the WG to not use that as the public facing name
    """
    link: (str | None) # Spec URL Anchor - ex) legacy-dynamicrendering
    version: (Version | None)
    extensions: list[str]
    supersededBy: (str | None)

@dataclass
class Handle:
    """<type> which represents a dispatch handle"""
    name: str # ex) VkBuffer
    aliases: list[str] # ex) ['VkSamplerYcbcrConversionKHR']

    type: str # ex) VK_OBJECT_TYPE_BUFFER
    protect: (str | None) # ex) VK_USE_PLATFORM_ANDROID_KHR

    # Chain of parent handles
    parent: (Handle | None) # ex) VkDevice is the parent of VkBuffer as it was used to create it

    # Only one will be True, the other is False
    instance: bool
    device: bool

    dispatchable: bool

    extensions: list[str] # All extensions that enable the handle

    # This dict tells where this handle is actually defined in an extension or version.
    # Example: VkVideoSessionKHR -> {"VK_KHR_video_queue": None}
    definingRequirements: dict[str, str | None] = field(default_factory=dict, init=False)

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class FuncPointerParam:
    """<funcpointer/param>"""
    name: str

    # the "base type" - will not preserve the 'const' or pointer info
    # ex) void, uint32_t, VkFormat, VkBuffer, etc
    type: str
    # the "full type" - will be cDeclaration without the type name
    # ex) const void*, uint32_t, const VkFormat, VkBuffer*, etc
    fullType: str

    # C string of param, ex) void* pUserData
    cDeclaration: str


@dataclass
class FuncPointer:
    """<funcpointer>"""
    name: str # ex) PFN_vkAllocationFunction

    protect: (str | None) # ex) 'VK_ENABLE_BETA_EXTENSIONS'

    returnType: str # ex) void, VkResult, etc

    requires: (str | None) # ex VkDebugUtilsMessengerCallbackDataEXT

    params: list[FuncPointerParam] # Each parameter of the command

    # function pointer typedef  - ex:
    # typedef void* (VKAPI_PTR void*PFN_vkAllocationFunction)(void* pUserData, size_t size, size_t alignment, VkSystemAllocationScope allocationScope);
    cFunctionPointer: str

class ExternSync(Enum):
    NONE          = auto() # no externsync attribute
    ALWAYS        = auto() # externsync="true"
    MAYBE         = auto() # externsync="maybe"
    SUBTYPE       = auto() # externsync="param->member"
    SUBTYPE_MAYBE = auto() # externsync="maybe:param->member"

@dataclass
class Param:
    """<command/param>"""
    name: str # ex) pCreateInfo, pAllocator, pBuffer
    alias: (str | None)

    # the "base type" - will not preserve the 'const' or pointer info
    # ex) void, uint32_t, VkFormat, VkBuffer, etc
    type: str
    # the "full type" - will be cDeclaration without the type name
    # ex) const void*, uint32_t, const VkFormat, VkBuffer*, etc
    # For arrays, this will only display the type, fixedSizeArray can be used to get the length
    fullType: str

    noAutoValidity: bool

    const: bool           # type contains 'const'
    length:  (str | None) # the known length of pointer, will never be 'null-terminated'
    nullTerminated: bool  # If a UTF-8 string, it will be null-terminated
    pointer: bool         # type contains a pointer (include 'PFN' function pointers)
    # Used to list how large an array of the type is
    # ex) lineWidthRange is ['2']
    # ex) memoryTypes is ['VK_MAX_MEMORY_TYPES']
    # ex) VkTransformMatrixKHR:matrix is ['3', '4']
    fixedSizeArray: list[str]

    optional: bool
    # Note: "optionalPointer" is a misleading name, this should have probably been "optionalPointedValue"
    optionalPointer: bool # if type contains a pointer, is the pointer value optional

    externSync: ExternSync
    externSyncPointer: (str | None)  # if type contains a pointer (externSync is SUBTYPE*),
                                     # only a specific member is externally synchronized.

    # C string of member, example:
    #   - const void* pNext
    #   - VkFormat format
    #   - VkStructureType sType
    cDeclaration: str

    def __lt__(self, other):
        return self.name < other.name

class CommandScope(Enum):
    NONE    = auto()
    INSIDE  = auto()
    OUTSIDE = auto()
    BOTH    = auto()

@dataclass
class Command:
    """<command>"""
    name: str # ex) vkCmdDraw
    alias: (str | None) # Because commands are interfaces into layers/drivers, we need all command alias
    protect: (str | None) # ex) 'VK_ENABLE_BETA_EXTENSIONS'

    extensions: list[str] # All extensions that enable the struct
    version: (Version | None) # None if Version 1.0

    returnType: str # ex) void, VkResult, etc

    params: list[Param] # Each parameter of the command

    # Only one will be True, the other is False
    instance: bool
    device: bool

    tasks: list[str]        # ex) [ action, state, synchronization ]
    queues: list[str]       # ex) [ VK_QUEUE_GRAPHICS_BIT, VK_QUEUE_COMPUTE_BIT ]
    allowNoQueues: bool     # VK_KHR_maintenance9 allows some calls to be done with zero queues
    successCodes: list[str] # ex) [ VK_SUCCESS, VK_INCOMPLETE ]
    errorCodes: list[str]   # ex) [ VK_ERROR_OUT_OF_HOST_MEMORY ]

    # Shows support if command can be in a primary and/or secondary command buffer
    primary: bool
    secondary: bool

    renderPass: CommandScope
    videoCoding: CommandScope

    implicitExternSyncParams: list[str]

    legacy: (Legacy | None)

    # C prototype string - ex:
    # VKAPI_ATTR VkResult VKAPI_CALL vkCreateInstance(
    #   const VkInstanceCreateInfo* pCreateInfo,
    #   const VkAllocationCallbacks* pAllocator,
    #   VkInstance* pInstance);
    cPrototype: str

    # function pointer typedef  - ex:
    # typedef VkResult (VKAPI_PTR *PFN_vkCreateInstance)
    #   (const VkInstanceCreateInfo* pCreateInfo, const VkAllocationCallbacks* pAllocator, VkInstance* pInstance);
    cFunctionPointer: str

    # This dict tells where this command is actually defined in an extension or version.
    # Example: vkCmdDrawMeshTasksIndirectCountEXT -> {"VK_EXT_mesh_shader": "VK_VERSION_1_2,VK_KHR_draw_indirect_count,VK_AMD_draw_indirect_count"}
    #          vkGetPhysicalDeviceToolProperties -> {"VK_VERSION_1_3": None}
    definingRequirements: dict[str, str | None] = field(default_factory=dict, init=False)

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class Member:
    """<member>"""
    name: str # ex) sType, pNext, flags, size, usage

    # the "base type" - will not preserve the 'const' or pointer info
    # ex) void, uint32_t, VkFormat, VkBuffer, etc
    type: str
    # the "full type" - will be cDeclaration without the type name
    # ex) const void*, uint32_t, const VkFormat, VkBuffer*, etc
    # For arrays, this will only display the type, fixedSizeArray can be used to get the length
    fullType: str

    noAutoValidity: bool
    limitType: (str | None) # ex) 'max', 'bitmask', 'bits', 'min,mul'

    const: bool           # type contains 'const'
    length:  (str | None) # the known length of pointer, will never be 'null-terminated'
    nullTerminated: bool  # If a UTF-8 string, it will be null-terminated
    pointer: bool         # type contains a pointer (include 'PFN' function pointers)
    # Used to list how large an array of the type is
    # ex) lineWidthRange is ['2']
    # ex) memoryTypes is ['VK_MAX_MEMORY_TYPES']
    # ex) VkTransformMatrixKHR:matrix is ['3', '4']
    fixedSizeArray: list[str]

    optional: bool
    # Note: "optionalPointer" is a misleading name, this should have probably been "optionalPointedValue"
    optionalPointer: bool # if type contains a pointer, is the pointer value optional

    externSync: ExternSync

    # C string of member, example:
    #   - const void* pNext
    #   - VkFormat format
    #   - VkStructureType sType
    cDeclaration: str

    bitFieldWidth: (int | None) # bit width (only for bit field struct members)

    # Selector for the union, this type determines the used data type in the union
    selector: (str | None)
    # Valid selections for the union member
    selection: list[str]

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class Struct:
    """<type category="struct"> or <type category="union">"""
    name: str # ex) VkImageSubresource2
    aliases: list[str] # ex) ['VkImageSubresource2KHR', 'VkImageSubresource2EXT']

    extensions: list[str] # All extensions that enable the struct
    version: (Version | None) # None if Version 1.0
    protect: (str | None) # ex) VK_ENABLE_BETA_EXTENSIONS

    members: list[Member]

    union: bool # Unions are just a subset of a Structs
    returnedOnly: bool

    sType: (str | None) # ex) VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO
    allowDuplicate: bool # can have a pNext point to itself

    # These use to be list['Struct'] but some circular loops occur and cause
    # pydevd warnings and made debugging slow (30 seconds to index a Struct)
    extends: list[str] # Struct names that this struct extends
    extendedBy: list[str] # Struct names that can be extended by this struct

    # This dict tells where this struct is actually defined in an extension or version.
    # Example: VkPhysicalDeviceMeshShaderFeaturesEXT -> {"VK_EXT_mesh_shader": None}
    #          VkPhysicalDeviceToolProperties -> {"VK_VERSION_1_3": None}
    definingRequirements: dict[str, str | None] = field(default_factory=dict, init=False)

    # This field is only set for enum definitions coming from Video Std headers
    videoStdHeader: (str | None) = None

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class EnumField:
    """<enum> of type enum"""
    name: str # ex) VK_DYNAMIC_STATE_SCISSOR_WITH_COUNT
    aliases: list[str] # ex) ['VK_DYNAMIC_STATE_SCISSOR_WITH_COUNT_EXT']
    parent: str  # ex) "VkStructureType" - Name of parent enum, Allows for reverse lookup

    protect: (str | None) # ex) VK_ENABLE_BETA_EXTENSIONS

    negative: bool # True if negative values are allowed (ex. VkResult)
    value: int
    valueStr: str # value as shown in spec (ex. "0", "2", "1000267000", "0x00000004")

    # some fields are enabled from 2 extensions (ex) VK_DESCRIPTOR_UPDATE_TEMPLATE_TYPE_PUSH_DESCRIPTORS_KHR)
    extensions: list[str] # None if part of 1.0 core
    # True when this field was added from an extension or version
    #   ex) VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR extends VkStructureType
    # False if this field is part of the original enum
    extending: bool

    # This dict tells where this enum field is actually defined in an extension or version.
    # Note: Only base name, not aliases (aliases in aliasFieldRequirements).
    # Example: VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MESH_SHADER_FEATURES_EXT -> {"VK_EXT_mesh_shader": None}
    #          VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TOOL_PROPERTIES -> {"VK_VERSION_1_3": None}
    definingRequirements: dict[str, str | None] = field(default_factory=dict, init=False)

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class Enum:
    """<enums> of type enum"""
    name: str # ex) VkLineRasterizationMode
    aliases: list[str] # ex) ['VkLineRasterizationModeKHR', 'VkLineRasterizationModeEXT']

    protect: (str | None) # ex) VK_ENABLE_BETA_EXTENSIONS

    bitWidth: int # 32 or 64 (currently all are 32, but field is to match with Bitmask)
    returnedOnly: bool

    fields: list[EnumField]

    extensions: list[str] # None if part of 1.0 core
    # Unique list of all extension that are involved in 'fields' (superset of 'extensions')
    fieldExtensions: list[str]

    # This dict tells where this enum is actually defined in an extension or version.
    # Example: VkLineRasterizationMode -> {"VK_VERSION_1_4": None},
    #          VkDescriptorMappingSourceEXT -> {"VK_EXT_descriptor_heap": None}
    definingRequirements: dict[str, str | None] = field(default_factory=dict, init=False)

    # This field is only set for enum definitions coming from Video Std headers
    videoStdHeader: (str | None) = None

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class Flag:
    """<enum> of type bitmask"""
    name: str # ex) VK_ACCESS_2_SHADER_READ_BIT
    aliases: list[str] # ex) ['VK_ACCESS_2_SHADER_READ_BIT_KHR']
    parent: str # ex) "VkAccessFlagBits2" - Name of parent bitmask, Allows for reverse lookup

    protect: (str | None) # ex) VK_ENABLE_BETA_EXTENSIONS

    value: int
    valueStr: str # value as shown in spec (ex. 0x00000000", "0x00000004", "0x0000000F", "0x800000000ULL")
    bitpos: (int | None) # Bit position in bitmask (ex. VK_CULL_MODE_FRONT_BIT has value of 1 and a bitmask of 0, but VK_CULL_MODE_NONE bitpos is None)
    multiBit: bool # if true, more than one bit is set (ex) VK_SHADER_STAGE_ALL_GRAPHICS)
    zero: bool     # if true, the value is zero (ex) VK_PIPELINE_STAGE_NONE)

    # some fields are enabled from 2 extensions (ex) VK_TOOL_PURPOSE_DEBUG_REPORTING_BIT_EXT)
    extensions: list[str] # None if part of 1.0 core
    # True when this flag was added from an extension or version
    #   ex) VK_ACCESS_2_SHADER_READ_BIT_KHR extends VkAccessFlagBits2
    # False if this field is part of the original bitmask
    extending: bool

    # This dict tells where this flag is actually defined in an extension or version, whether under a <require depends="..."> attribute or not.
    # Note: Only base name, not aliases (aliases in aliasFlagRequirements).
    # Example: VK_FORMAT_FEATURE_2_VIDEO_DECODE_OUTPUT_BIT_KHR -> {"VK_KHR_video_decode_queue": "VK_KHR_format_feature_flags2,VK_VERSION_1_3"}
    definingRequirements: dict[str, str | None] = field(default_factory=dict, init=False)

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class Bitmask:
    """<enums> of type bitmask"""
    name: str     # ex) VkAccessFlagBits2
    aliases: list[str] # ex) ['VkAccessFlagBits2KHR']

    flagName: str # ex) VkAccessFlags2
    protect: (str | None) # ex) VK_ENABLE_BETA_EXTENSIONS

    bitWidth: int # 32 or 64
    returnedOnly: bool

    flags: list[Flag]

    extensions: list[str] # None if part of 1.0 core
    # Unique list of all extension that are involved in 'flag' (superset of 'extensions')
    flagExtensions: list[str]

    # This dict tells where this bitmask is actually defined in an extension or version, whether under a <require depends="..."> attribute or not.
    # Example: VkVideoDecodeCapabilityFlagBitsKHR -> {"VK_KHR_video_decode_queue": None}
    #          VkAccessFlagBits2 -> {"VK_VERSION_1_3": None}
    definingRequirements: dict[str, str | None] = field(default_factory=dict, init=False)

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class Flags:
    """<type> defining flags types"""
    name: str # ex) VkAccessFlags2
    aliases: list[str] # ex) [`VkAccessFlags2KHR`]

    bitmaskName: (str | None) # ex) VkAccessFlagBits2
    protect: (str | None) # ex) VK_ENABLE_BETA_EXTENSIONS

    baseFlagsType: str # ex) VkFlags
    bitWidth: int # 32 or 64
    returnedOnly: bool

    extensions: list[str] # None if part of 1.0 core

    # This dict tells where this flags type is actually defined in an extension or version, whether under a <require depends="..."> attribute or not.
    # Example: VkVideoDecodeCapabilityFlagsKHR -> {"VK_KHR_video_decode_queue": None}
    #          VkAccessFlags2 -> {"VK_VERSION_1_3": None}
    definingRequirements: dict[str, str | None] = field(default_factory=dict, init=False)

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class Constant:
    name: str # ex) VK_UUID_SIZE
    type: str # ex) uint32_t, float
    value: (int | float)
    valueStr: str # value as shown in spec (ex. "(~0U)", "256U", etc)

    # This field is only set for enum definitions coming from Video Std headers
    videoStdHeader: (str | None) = None

@dataclass
class FormatComponent:
    """<format/component>"""
    type: str # ex) R, G, B, A, D, S, etc
    bits: str # will be an INT or 'compressed'
    numericFormat: str # ex) UNORM, SINT, etc
    planeIndex: (int | None) # None if no planeIndex in format

@dataclass
class FormatPlane:
    """<format/plane>"""
    index: int
    widthDivisor: int
    heightDivisor: int
    compatible: str

@dataclass
class Format:
    """<format>"""
    name: str
    className: str
    blockSize: int
    texelsPerBlock: int
    blockExtent: list[str]
    packed: (int | None) # None == not-packed
    chroma: (str | None)
    compressed: (str | None)
    components: list[FormatComponent] # <format/component>
    planes: list[FormatPlane]  # <format/plane>
    spirvImageFormat: (str | None)

@dataclass
class SyncSupport:
    """<syncsupport>"""
    # Note - We normally use empty list instead of None, these are exceptions
    queues: (list[str] | None)  # ex) [ VK_QUEUE_GRAPHICS_BIT, VK_QUEUE_COMPUTE_BIT ]
    stages: (list[Flag] | None) # VkPipelineStageFlagBits2
    max: bool # If this supports max values

@dataclass
class SyncEquivalent:
    """<syncequivalent>"""
    # Note - We normally use empty list instead of None, these are exceptions
    stages: (list[Flag] | None) # VkPipelineStageFlagBits2
    accesses: (list[Flag] | None) # VkAccessFlagBits2
    max: bool # If this equivalent to everything

@dataclass
class SyncStage:
    """<syncstage>"""
    flag: Flag # VkPipelineStageFlagBits2
    support: SyncSupport
    equivalent: SyncEquivalent

@dataclass
class SyncAccess:
    """<syncaccess>"""
    flag: Flag # VkAccessFlagBits2
    support: SyncSupport
    equivalent: SyncEquivalent

@dataclass
class SyncPipelineStage:
    """<syncpipelinestage>"""
    order: (str | None)
    before: (str | None)
    after: (str | None)
    value: str

@dataclass
class SyncPipeline:
    """<syncpipeline>"""
    name: str
    depends: list[str]
    stages: list[SyncPipelineStage]

@dataclass
class SpirvEnables:
    """What is needed to enable the SPIR-V element"""
    version: (str | None)
    extension: (str | None)
    struct: (str | None)
    feature: (str | None)
    requires: (str | None)
    property: (str | None)
    member: (str | None)
    value: (str | None)

@dataclass
class Spirv:
    """<spirvextension> and <spirvcapability>"""
    name: str
    # Only one will be True, the other is False
    extension: bool
    capability: bool
    enable: list[SpirvEnables]

@dataclass
class VideoRequiredCapabilities:
    """<videorequirecapabilities>"""
    struct: str     # ex) VkVideoEncodeCapabilitiesKHR
    member: str     # ex) flags
    value: str      # ex) VK_VIDEO_ENCODE_CAPABILITY_QUANTIZATION_DELTA_MAP_BIT_KHR
                    # may contain XML boolean expressions ("+" means AND, "," means OR)

@dataclass
class VideoFormat:
    """<videoformat>"""
    name: str       # ex) Decode Output
    usage: str      # ex) VK_IMAGE_USAGE_VIDEO_DECODE_DST_BIT_KHR
                    # may contain XML boolean expressions ("+" means AND, "," means OR)

    requiredCaps: list[VideoRequiredCapabilities]
    properties: dict[str, str]

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class VideoProfileMember:
    """<videoprofilemember> and <videoprofile>"""
    name: str
    # Video profile struct member (value attribute of <videoprofile>) value as key,
    # profile name substring (name attribute of <videoprofile>) as value
    values: dict[str, str]

@dataclass
class VideoProfiles:
    """<videoprofiles>"""
    name: str
    members: dict[str, VideoProfileMember]

@dataclass
class VideoCodec:
    """<videocodec>"""
    name: str   # ex) H.264 Decode
    value: (str | None) # If no video codec operation flag bit is associated with the codec
                        # then it is a codec category (e.g. decode, encode), not a specific codec

    profiles: dict[str, VideoProfiles]
    capabilities: dict[str, str]
    formats: dict[str, VideoFormat]

    def __lt__(self, other):
        return self.name < other.name

@dataclass
class VideoStdHeader:
    """<extension> in video.xml"""
    name: str # ex) vulkan_video_codec_h264std_decode
    version: (str | None)   # ex) VK_STD_VULKAN_VIDEO_CODEC_H264_DECODE_API_VERSION_1_0_0
                            # None if it is a shared common Video Std header

    headerFile: str # ex) vk_video/vulkan_video_codec_h264std_decode.h

    # Other Video Std headers that this one depends on
    depends: list[str]

@dataclass
class VideoStd:
    headers: dict[str, VideoStdHeader] = field(default_factory=dict, init=False)

    enums: dict[str, Enum]           = field(default_factory=dict, init=False)
    structs: dict[str, Struct]       = field(default_factory=dict, init=False)
    constants: dict[str, Constant]   = field(default_factory=dict, init=False)

# This is the global Vulkan Object that holds all the information from parsing the XML
# This class is designed so all generator scripts can use this to obtain data
@dataclass
class VulkanObject():
    headerVersion:         str = '' # value of VK_HEADER_VERSION (ex. '345')
    headerVersionComplete: str = '' # value of VK_HEADER_VERSION_COMPLETE (ex. '1.2.345' )

    extensions: dict[str, Extension] = field(default_factory=dict, init=False)
    versions:   dict[str, Version]   = field(default_factory=dict, init=False)

    handles:   dict[str, Handle]     = field(default_factory=dict, init=False)
    commands:  dict[str, Command]    = field(default_factory=dict, init=False)
    structs:   dict[str, Struct]     = field(default_factory=dict, init=False)
    enums:     dict[str, Enum]       = field(default_factory=dict, init=False)
    bitmasks:  dict[str, Bitmask]    = field(default_factory=dict, init=False)
    flags:     dict[str, Flags]      = field(default_factory=dict, init=False)
    constants: dict[str, Constant]   = field(default_factory=dict, init=False)
    formats:   dict[str, Format]     = field(default_factory=dict, init=False)
    funcPointers: dict[str, FuncPointer] = field(default_factory=dict, init=False)

    syncStage:    list[SyncStage]    = field(default_factory=list, init=False)
    syncAccess:   list[SyncAccess]   = field(default_factory=list, init=False)
    syncPipeline: list[SyncPipeline] = field(default_factory=list, init=False)

    spirv: list[Spirv]               = field(default_factory=list, init=False)

    # ex) [ xlib : VK_USE_PLATFORM_XLIB_KHR ]
    platforms: dict[str, str]        = field(default_factory=dict, init=False)
    # list of all vendor Suffix names (KHR, EXT, etc. )
    vendorTags: list[str]            = field(default_factory=list, init=False)

    # Alias requirements - store definingRequirements separately for aliases (they do not have objects)
    # Maps alias name -> definingRequirements dict (same structure as definingRequirements field)
    # Example: {"VkLineRasterizationModeKHR": {"VK_KHR_line_rasterization": None}}
    aliasTypeRequirements: dict[str, dict[str, str | None]] = field(default_factory=dict, init=False)
    # Example: {"VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_LINE_RASTERIZATION_FEATURES_EXT": {"VK_EXT_line_rasterization": None}}
    aliasFieldRequirements: dict[str, dict[str, str | None]] = field(default_factory=dict, init=False)
    # Example: {"VK_ADDRESS_COMMAND_MAYBE_ALIASES_TRANSFORM_FEEDBACK_BUFFER_BIT_EXT": {"VK_EXT_transform_feedback": None}}
    aliasFlagRequirements: dict[str, dict[str, str | None]] = field(default_factory=dict, init=False)

    # Video codec information from the vk.xml
    videoCodecs: dict[str, VideoCodec] = field(default_factory=dict, init=False)

    # Video Std header information from the video.xml
    videoStd: (VideoStd | None) = None
