Class MetadataFormat

A description of a member metadata format. Member metadata is used for type instance tests, virtual method lookup and reflection.

Inheritance

object

MetadataFormat

ClosedMetadataFormat

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Flame.Llvm

Assembly: Flame.Llvm.dll

Syntax

public abstract class MetadataFormat

Properties

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TypesWithMetadata

Gets a sequence containing all types that have metadata emitted into the module.

Declaration

public abstract IEnumerable<IType> TypesWithMetadata { get; }

Property Value

Type	Description
IEnumerable<IType>	A sequence of types.

Methods

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EmitIsSubtype(LLVMValueRef, IType, ModuleBuilder, IRBuilder, string)

Emits LLVM IR instructions that test if the type corresponding to a type metadata handle is a subtype of another type.

Declaration

public abstract LLVMValueRef EmitIsSubtype(LLVMValueRef subtypeMetadata, IType supertype, ModuleBuilder module, IRBuilder builder, string name)

Parameters

Type	Name	Description
LLVMValueRef	subtypeMetadata	A type metadata handle of a potential subtype.
IType	supertype	A potential supertype.
ModuleBuilder	module	The LLVM module to generate the instructions in.
IRBuilder	builder	An instruction builder to use for emitting instructions.
string	name	A suggested name for the resulting Boolean value.

Returns

Type	Description
LLVMValueRef	A Boolean value that is `true` if the type corresponding to `subtypeMetadata` is a subtype of `supertype`; otherwise, `false`.

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EmitMethodAddress(IMethod, LLVMValueRef, ModuleBuilder, IRBuilder, string)

Builds LLVM IR instructions that perform a virtual method lookup: loads the address of the implementation of a virtual method given a type metadata pointer for the 'this' type.

Declaration

public abstract LLVMValueRef EmitMethodAddress(IMethod callee, LLVMValueRef metadata, ModuleBuilder module, IRBuilder builder, string name)

Parameters

Type	Name	Description
IMethod	callee	A virtual method to find an implementation for.
LLVMValueRef	metadata	A handle to the type metadata of the 'this' type.
ModuleBuilder	module	The LLVM module to generate the instructions in.
IRBuilder	builder	An instruction builder to use for emitting instructions.
string	name	A suggested name for the value that refers to the method implementation address.

Returns

Type	Description
LLVMValueRef	A pointer to a method implementation.

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GetMetadata(IType, ModuleBuilder)

Builds LLVM IR instructions that get a handle to the metadata for a particular type.

Declaration

public abstract LLVMValueRef GetMetadata(IType type, ModuleBuilder module)

Parameters

Type	Name	Description
IType	type	The type whose metadata is to be inspected.
ModuleBuilder	module	The LLVM module to generate the metadata in.

Returns

Type	Description
LLVMValueRef	A metadata pointer.

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GetMetadataType(ModuleBuilder)

Gets the type of a type metadata handle.

Declaration

public abstract LLVMTypeRef GetMetadataType(ModuleBuilder module)

Parameters

Type	Name	Description
ModuleBuilder	module	A module.

Returns

Type	Description
LLVMTypeRef	The type of a type metadata handle.