Enum mlua::MetaMethod

pub enum MetaMethod {
    Add,
    Sub,
    Mul,
    Div,
    Mod,
    Pow,
    Unm,
    IDiv,
    BAnd,
    BOr,
    BXor,
    BNot,
    Shl,
    Shr,
    Concat,
    Len,
    Eq,
    Lt,
    Le,
    Index,
    NewIndex,
    Call,
    ToString,
    Pairs,
    IPairs,
    Iter,
    Close,
    Custom(StdString),
}

Kinds of metamethods that can be overridden.

Currently, this mechanism does not allow overriding the __gc metamethod, since there is generally no need to do so: UserData implementors can instead just implement Drop.

Variants

Add

The + operator.

Sub

The - operator.

Mul

The * operator.

Div

The / operator.

Mod

The % operator.

Pow

The ^ operator.

Unm

The unary minus (-) operator.

IDiv

The floor division (//) operator. Requires feature = "lua54/lua53"

BAnd

The bitwise AND (&) operator. Requires feature = "lua54/lua53"

BOr

The bitwise OR (|) operator. Requires feature = "lua54/lua53"

BXor

The bitwise XOR (binary ~) operator. Requires feature = "lua54/lua53"

BNot

The bitwise NOT (unary ~) operator. Requires feature = "lua54/lua53"

Shl

The bitwise left shift (<<) operator.

Shr

The bitwise right shift (>>) operator.

Concat

The string concatenation operator ...

Len

The length operator #.

Eq

The == operator.

Lt

The < operator.

Le

The <= operator.

Index

Index access obj[key].

NewIndex

Index write access obj[key] = value.

Call

The call “operator” obj(arg1, args2, ...).

ToString

The __tostring metamethod.

This is not an operator, but will be called by methods such as tostring and print.

Pairs

The __pairs metamethod.

This is not an operator, but it will be called by the built-in pairs function.

Requires feature = "lua54/lua53/lua52"

IPairs

Available on crate features lua52 or luajit52 only.

The __ipairs metamethod.

This is not an operator, but it will be called by the built-in ipairs function.

Requires feature = "lua52"

Iter

Available on crate feature luau only.

The __iter metamethod.

Executed before the iteration begins, and should return an iterator function like next (or a custom one).

Requires feature = "lua"

Close

The __close metamethod.

Executed when a variable, that marked as to-be-closed, goes out of scope.

More information about to-be-closed variabled can be found in the Lua 5.4 documentation.

Requires feature = "lua54"

Custom(StdString)

A custom metamethod.

Must not be in the protected list: __gc, __metatable, __mlua*.

Implementations

impl MetaMethod

pub fn name(&self) -> &str

Returns Lua metamethod name, usually prefixed by two underscores.

Trait Implementations

impl Clone for MetaMethod

fn clone(&self) -> MetaMethod

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MetaMethod

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

Formats the value using the given formatter.

impl Display for MetaMethod

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

Formats the value using the given formatter.

impl From<&str> for MetaMethod

fn from(name: &str) -> Self

Converts to this type from the input type.

impl From<String> for MetaMethod

fn from(name: StdString) -> Self

Converts to this type from the input type.

impl Hash for MetaMethod

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,

Feeds a slice of this type into the given Hasher.

impl PartialEq<MetaMethod> for MetaMethod

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for MetaMethod