Enum LinkParamValueOrNone 

#[repr(C, u8)]
pub enum LinkParamValueOrNone {
    None,
    Specified(OwnedStr),
}

A struct to hold a specific ‘?’, since an empty value (param(–a, )) serializes differently than a non-provided value (param(–a))

Variants

None

Handles the case when no value is provided at all: param(–a)

Specified(OwnedStr)

Handles the cases for provided, or provided but empty, e.g. param(–a, blue) and param(–a, )

Trait Implementations

impl Clone for LinkParamValueOrNone

fn clone(&self) -> LinkParamValueOrNone

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LinkParamValueOrNone

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

Formats the value using the given formatter.

impl MallocSizeOf for LinkParamValueOrNone

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl PartialEq for LinkParamValueOrNone

fn eq(&self, other: &LinkParamValueOrNone) -> 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 SpecifiedValueInfo for LinkParamValueOrNone

const SUPPORTED_TYPES: u8

Supported CssTypes by the given value type.

fn collect_completion_keywords(_f: &mut dyn FnMut(&[&'static str]))

Collect value starting words for the given specified value type. This includes keyword and function names which can appear at the beginning of a value of this type.

impl ToComputedValue for LinkParamValueOrNone

where OwnedStr: ToComputedValue<ComputedValue = OwnedStr>,

type ComputedValue = LinkParamValueOrNone

The computed value type we’re going to be converted to.

fn from_computed_value(from: &Self::ComputedValue) -> Self

Convert a computed value to specified value form.

fn to_computed_value(&self, context: &Context<'_>) -> Self::ComputedValue

Convert a specified value to a computed value, using itself and the data inside the Context.

impl ToResolvedValue for LinkParamValueOrNone

where OwnedStr: ToResolvedValue<ResolvedValue = OwnedStr>,

type ResolvedValue = LinkParamValueOrNone

The resolved value type we’re going to be converted to.

fn from_resolved_value(from: Self::ResolvedValue) -> Self

Convert a resolved value to resolved value form.

fn to_resolved_value(self, context: &Context<'_>) -> Self::ResolvedValue

Convert a resolved value to a resolved value.

impl ToShmem for LinkParamValueOrNone

fn to_shmem(&self, builder: &mut SharedMemoryBuilder) -> Result<Self>

Clones this value into a form suitable for writing into a SharedMemoryBuilder.

impl StructuralPartialEq for LinkParamValueOrNone