Enum Item

pub enum Item {
    UTF8(String),
    Integer(i32),
    Float(f32),
    Long(i64),
    Double(f64),
    Class(u16),
    String(u16),
    FieldRef {
        class: u16,
        name_and_type: u16,
    },
    MethodRef {
        class: u16,
        name_and_type: u16,
    },
    InterfaceMethodRef {
        class: u16,
        name_and_type: u16,
    },
    NameAndType {
        name: u16,
        desc: u16,
    },
    MethodHandle {
        kind: ReferenceKind,
        index: u16,
    },
    MethodType(u16),
    InvokeDynamic {
        bootstrap_method: u16,
        name_and_type: u16,
    },
    Module(u16),
    Package(u16),
}

A constant pool item

Variants

UTF8(String)

An UTF-8 encoded string. Inside the class file itself, a modified format is used.

Integer(i32)

An int.

Float(f32)

A float.

Long(i64)

A long. Takes two spots, instead of one.

Double(f64)

A double. Takes two spots, instead of one.

Class(u16)

An index to the name of the class, or the descriptor of an array type. Always refers to an Item::UTF8(_).

String(u16)

A java.lang.String object.

FieldRef

Describes a field reference.

Fields

class: u16

The index to an Item::Class(_). Can be either a Class, or an Interface.

name_and_type: u16

The index to an Item::NameAndType { .. }.

MethodRef

Describes a method reference.

Fields

class: u16

The index to an Item::Class(_). Must be a Class.

name_and_type: u16

The index to an Item::NameAndType { .. }.

InterfaceMethodRef

Describes a method reference, where the class is an interface.

Fields

class: u16

The index to an Item::Class(_). Must be an Interface.

name_and_type: u16

The index to an Item::NameAndType { .. }.

NameAndType

Represents a field or method, without indicating which class or type it belongs to.

Fields

name: u16

The index to an Item::UTF8(_). Must either be a valid unqualfied name or <init>.

desc: u16

The index to an Item::UTF8(_). Represents a valid field or method descriptor.

MethodHandle

Represents a method handle

Fields

kind: ReferenceKind

Characterizes its bytecode behaviour.

index: u16

If kind is either GetField, GetStatic, PutField, or PutStatic, the entry at that index must be a Item::FieldRef { .. }. If kind is InvokeVirtual or InvokeSpecial, the entry at that index must be Item::MethodRef { .. }. If kind is InvokeStatic or InvokeSpecial and the version of the class is less than 52.0, the entry at that index must be Item::MethodRef { .. }. If it is 52.0 or above, it must either be a MethodRef or an Item::InterfaceMethodRef { .. }. If kind is InvokeInterface, the entry at that index must be an Item::InterfaceMethodRef { .. }.

MethodType(u16)

Describes a method type. The entry at that index must be an Item::UTF8(_) representing a method descriptor.

InvokeDynamic

Describes a invoke dynamic instruction, and specifies information regarding the bootstrap method.

Fields

bootstrap_method: u16

The index to an entry of the BootstrapMethods attribute of the class file.

name_and_type: u16

The index to an Item::NameAndType { .. }.

Module(u16)

Represents a module. The entry at that index must be a Item::UTF8(_) with a valid name. The class must have the MODULE flag set.

Package(u16)

Represents a package exported or opened by a module. The entry at that index must be an Item::UTF8(_) with a valid package name encoded in internal form. The class must have the MODULE flag set.

Trait Implementations

impl Clone for Item

fn clone(&self) -> Item

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Item

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

Formats the value using the given formatter.

impl Hash for Item

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 PartialEq for Item

fn eq(&self, other: &Item) -> 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 Eq for Item