Enum CodedIndexType

#[repr(usize)]
pub enum CodedIndexType {
    TypeDefOrRef = 0,
    HasConstant = 1,
    HasCustomAttribute = 2,
    HasFieldMarshal = 3,
    HasDeclSecurity = 4,
    MemberRefParent = 5,
    HasSemantics = 6,
    MethodDefOrRef = 7,
    MemberForwarded = 8,
    Implementation = 9,
    CustomAttributeType = 10,
    ResolutionScope = 11,
    TypeOrMethodDef = 12,
}

Represents all possible coded index types defined in the CLI metadata specification.

A coded index type defines which combination of metadata tables can be referenced by a particular coded index field. Each variant corresponds to a specific set of tables that can be encoded together, allowing for space-efficient cross-references within the metadata stream.

Encoding Scheme

Coded indices use the lower bits to encode the table type and the remaining bits for the row index. The number of bits required for the table type depends on how many tables are included in the combination.

Examples

• TypeDefOrRef can reference TypeDef, TypeRef, or TypeSpec tables
• HasConstant can reference Field, Param, or Property tables
• HasCustomAttribute can reference any of 22 different table types

Reference

• ECMA-335 Standard - Section II.24.2.6

Variants

TypeDefOrRef = 0

References TypeDef, TypeRef, or TypeSpec tables.

Used to identify type definitions, references, or specifications in a unified manner throughout the metadata.

HasConstant = 1

References Field, Param, or Property tables.

Used to identify entities that can have constant values assigned to them.

HasCustomAttribute = 2

References any entity that can have custom attributes attached.

This is the most comprehensive coded index type, supporting references to: MethodDef, Field, TypeRef, TypeDef, Param, InterfaceImpl, MemberRef, Module, Permission, Property, Event, StandAloneSig, ModuleRef, TypeSpec, Assembly, AssemblyRef, File, ExportedType, ManifestResource, GenericParam, GenericParamConstraint, MethodSpec.

HasFieldMarshal = 3

References Field or Param tables.

Used to identify entities that can have marshalling information for interop scenarios.

HasDeclSecurity = 4

References TypeDef, MethodDef, or Assembly tables.

Used to identify entities that can have declarative security attributes applied.

MemberRefParent = 5

References TypeDef, TypeRef, ModuleRef, MethodDef, or TypeSpec tables.

Used as the parent reference for member references.

HasSemantics = 6

References Event or Property tables.

Used to identify entities that can have semantic methods (getter, setter, etc.) associated with them.

MethodDefOrRef = 7

References MethodDef or MemberRef tables.

Used to reference method definitions or member references in a unified manner.

MemberForwarded = 8

References Field or MethodDef tables.

Used to identify members that are forwarded to other assemblies.

Implementation = 9

References File, AssemblyRef, or ExportedType tables.

Used to specify the implementation location for exported types.

CustomAttributeType = 10

References MethodDef or MemberRef tables.

Used to identify the constructor methods for custom attributes. Note: Some indices (0, 1, 4) are normally unused but supported by the encoding scheme.

ResolutionScope = 11

References Module, ModuleRef, AssemblyRef, or TypeRef tables.

Used to specify the scope in which a type reference should be resolved.

TypeOrMethodDef = 12

References TypeDef or MethodDef tables.

Used to reference either type or method definitions in contexts where both are valid targets.

Implementations

impl CodedIndexType

pub fn tables(&self) -> &'static [TableId]

Returns the array of table IDs that can be referenced by this coded index type.

This method provides the lookup table that defines which metadata tables can be encoded using this particular coded index type. The order of tables in the returned slice corresponds to the encoded values (0, 1, 2, etc.).

Returns

A static slice containing the TableId values that can be referenced by this coded index type, in encoding order.

Trait Implementations

impl Clone for CodedIndexType

fn clone(&self) -> CodedIndexType

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CodedIndexType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl EnumCount for CodedIndexType

const COUNT: usize = 13usize

impl Hash for CodedIndexType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl IntoEnumIterator for CodedIndexType

type Iterator = CodedIndexTypeIter

fn iter() -> CodedIndexTypeIter

impl PartialEq for CodedIndexType

fn eq(&self, other: &CodedIndexType) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for CodedIndexType

impl Eq for CodedIndexType

impl StructuralPartialEq for CodedIndexType