Module FieldAttributes

Field attribute constants for controlling field characteristics and behavior

This module provides constants for the FieldAttributes bitmask that controls various aspects of field behavior including access control, storage type, mutability, and special runtime characteristics. These attributes are defined in the ECMA-335 specification and control how the runtime handles field access and storage.

Attribute Categories

Access Control (3-bit mask)

Controls visibility and accessibility of the field from different contexts.

Storage Type

Determines whether the field is per-instance or shared across all instances.

Mutability

Controls when and how the field value can be modified.

Special Characteristics

Provides additional runtime behavior and metadata information.

Reference

• ECMA-335 II.23.1.5 - FieldAttributes specification

Constants

ASSEMBLY

Field accessible by anyone within the assembly

COMPILER_CONTROLLED

Field not referenceable by user code

FAMILY

Field accessible only by type and subtypes

FAM_AND_ASSEM

Field accessible by subtypes only within this assembly

FAM_OR_ASSEM

Field accessible by subtypes anywhere, plus anyone in assembly

FIELD_ACCESS_MASK

Mask for extracting access control bits from field attributes

HAS_DEFAULT

Field has a default value

HAS_FIELD_MARSHAL

Field has associated marshaling information

HAS_FIELD_RVA

Field has associated RVA (Relative Virtual Address)

INIT_ONLY

Field can only be initialized, not written after initialization

LITERAL

Field value is a compile-time constant

NOT_SERIALIZED

Field should not be serialized when type is remoted

PINVOKE_IMPL

Implementation is forwarded through P/Invoke

PRIVATE

Field accessible only by the parent type

PUBLIC

Field accessible by anyone who has visibility to this scope

RTSPECIAL_NAME

CLI provides special behavior depending on the field name

SPECIAL_NAME

Field has special name significance

STATIC

Field is defined on type rather than per instance