Trait ValueTypeOptional

pub trait ValueTypeOptional:
    ValueType
    + ToValueOptional
    + FromValueOptional<'static>
    + StaticType { }

A type that can be stored in Values and is optional.

These are types were storing an Option is valid. Examples are String and all object types.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl ValueTypeOptional for Box<str>

impl ValueTypeOptional for String

impl ValueTypeOptional for PathBuf

impl ValueTypeOptional for Context

impl ValueTypeOptional for Device

impl ValueTypeOptional for ImageSurface

impl ValueTypeOptional for Matrix

impl ValueTypeOptional for RecordingSurface

impl ValueTypeOptional for Rectangle

impl ValueTypeOptional for RectangleInt

impl ValueTypeOptional for Region

impl ValueTypeOptional for Surface

Implementors

impl ValueTypeOptional for BoxedValue

impl ValueTypeOptional for GString