Enum Constant 

pub enum Constant {
    Utf8(CodeUnitString),
    Integer(u32),
    Float(u32),
    Long(u64),
    Double(u64),
    Class {
        name_index: u16,
    },
    String {
        string_index: u16,
    },
    Fieldref {
        class_index: u16,
        name_and_type_index: u16,
    },
    Methodref {
        class_index: u16,
        name_and_type_index: u16,
    },
    InterfaceMethodref {
        class_index: u16,
        name_and_type_index: u16,
    },
    NameAndType {
        name_index: u16,
        descriptor_index: u16,
    },
    MethodHandle {
        reference_kind: u8,
        reference_index: u16,
    },
    MethodType {
        descriptor_index: u16,
    },
    Dynamic {
        bootstrap_method_attr_index: u16,
        name_and_type_index: u16,
    },
    InvokeDynamic {
        bootstrap_method_attr_index: u16,
        name_and_type_index: u16,
    },
    Module {
        name_index: u16,
    },
    Package {
        name_index: u16,
    },
}

One usable JVM constant-pool entry.

Variants

Utf8(CodeUnitString)

A modified-UTF-8 string, represented without losing UTF-16 code units.

Integer(u32)

A signed int bit pattern.

Float(u32)

An IEEE 754 single-precision bit pattern.

Long(u64)

A signed long bit pattern.

Double(u64)

An IEEE 754 double-precision bit pattern.

Class

A class or interface name index.

Fields

name_index: u16

Index of the Utf8 internal name.

String

A string contents index.

Fields

string_index: u16

Index of the Utf8 string contents.

Fieldref

A field reference.

Fields

class_index: u16

Index of the declaring Class.

name_and_type_index: u16

Index of the member NameAndType.

Methodref

A class method reference.

Fields

class_index: u16

Index of the declaring Class.

name_and_type_index: u16

Index of the member NameAndType.

InterfaceMethodref

An interface method reference.

Fields

class_index: u16

Index of the declaring interface Class.

name_and_type_index: u16

Index of the member NameAndType.

NameAndType

A name and descriptor pair.

Fields

name_index: u16

Index of the member-name Utf8.

descriptor_index: u16

Index of the descriptor Utf8.

MethodHandle

A direct method-handle reference.

Fields

reference_kind: u8

JVM reference-kind discriminator from 1 through 9.

reference_index: u16

Index of the category selected by reference_kind.

MethodType

A method descriptor.

Fields

descriptor_index: u16

Index of the method-descriptor Utf8.

Dynamic

A dynamically computed constant.

Fields

bootstrap_method_attr_index: u16

Index into the class’s BootstrapMethods attribute.

name_and_type_index: u16

Index of the constant’s NameAndType.

InvokeDynamic

A dynamically selected call site.

Fields

bootstrap_method_attr_index: u16

Index into the class’s BootstrapMethods attribute.

name_and_type_index: u16

Index of the call site’s NameAndType.

Module

A module name.

Fields

name_index: u16

Index of the module-name Utf8.

Package

A package name.

Fields

name_index: u16

Index of the package-name Utf8.

Trait Implementations

impl Clone for Constant

fn clone(&self) -> Constant

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Constant

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

Formats the value using the given formatter.

impl PartialEq for Constant

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Constant