Enum valuable::Variant

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pub enum Variant<'a> {
    Static(&'static VariantDef<'static>),
    Dynamic(VariantDef<'a>),
}
Expand description

An enum variant

Returned by Enumerable::variant(), Variant represents a single enum variant.

Variants§

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Static(&'static VariantDef<'static>)

The variant is statically defined by the associated enum.

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Dynamic(VariantDef<'a>)

The variant is dynamically defined and not included as part of Enumerable::definition().

Implementations§

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impl Variant<'_>

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pub fn name(&self) -> &str

Returns the variant’s name

Examples
use valuable::{Fields, Variant, VariantDef};

static VARIANT: &VariantDef<'static> = &VariantDef::new(
    "Foo", Fields::Unnamed(2));

let variant = Variant::Static(VARIANT);
assert_eq!("Foo", variant.name());
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pub fn fields(&self) -> &Fields<'_>

Returns the variant’s fields

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pub fn is_named_fields(&self) -> bool

Returns true if the variant has associated named fields.

Examples

With named fields

use valuable::{Fields, NamedField, Variant, VariantDef};

static VARIANT: &VariantDef<'static> = &VariantDef::new(
    "Foo", Fields::Named(&[NamedField::new("hello")]));

let variant = Variant::Static(VARIANT);
assert!(variant.is_named_fields());

With unnamed fields

use valuable::{Fields, Variant, VariantDef};

static VARIANT: &VariantDef<'static> = &VariantDef::new(
    "Foo", Fields::Unnamed(1));

let variant = Variant::Static(VARIANT);
assert!(!variant.is_named_fields());
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pub fn is_unnamed_fields(&self) -> bool

Returns true if the variant has associated unnamed fields.

Examples

With named fields

use valuable::{Fields, NamedField, Variant, VariantDef};

static VARIANT: &VariantDef<'static> = &VariantDef::new(
    "Foo", Fields::Named(&[NamedField::new("hello")]));

let variant = Variant::Static(VARIANT);
assert!(!variant.is_unnamed_fields());

With unnamed fields

use valuable::{Fields, Variant, VariantDef};

static VARIANT: &VariantDef<'static> = &VariantDef::new(
    "Foo", Fields::Unnamed(1));

let variant = Variant::Static(VARIANT);
assert!(variant.is_unnamed_fields());

Trait Implementations§

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impl<'a> Debug for Variant<'a>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'a> RefUnwindSafe for Variant<'a>

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impl<'a> Send for Variant<'a>

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impl<'a> Sync for Variant<'a>

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impl<'a> Unpin for Variant<'a>

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impl<'a> UnwindSafe for Variant<'a>

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.