Enum ValueClass 

pub enum ValueClass {
    Literal(LiteralClass),
    Type(TypeClass),
    Expr,
}

Constrains for attribute value type

Variants

Literal(LiteralClass)

The value must be a literal matching given literal constraints (see LiteralClass)

Type(TypeClass)

The value must be of a native rust type matching given type constraints (see TypeClass)

Expr

The value must be of a native rust expression.

Implementations

impl ValueClass

pub fn str() -> ValueClass

Convenience constructor creating ValueClass::Literal(LiteralClass::Str)

pub fn byte_str() -> ValueClass

Convenience constructor creating ValueClass::Literal(LiteralClass::ByteStr)

pub fn byte() -> ValueClass

Convenience constructor creating ValueClass::Literal(LiteralClass::Byte)

pub fn int() -> ValueClass

Convenience constructor creating ValueClass::Literal(LiteralClass::Int)

pub fn float() -> ValueClass

Convenience constructor creating ValueClass::Literal(LiteralClass::Float)

pub fn char() -> ValueClass

Convenience constructor creating ValueClass::Literal(LiteralClass::Char)

pub fn bool() -> ValueClass

Convenience constructor creating ValueClass::Literal(LiteralClass::Bool)

impl ValueClass

pub fn check( self, value: &ArgValue, attr: impl ToString, arg: impl ToString, ) -> Result<(), Error>

Checks the value against value class requirements, generating Error if the requirements are not met.

Trait Implementations

impl Clone for ValueClass

fn clone(&self) -> ValueClass

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValueClass

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

Formats the value using the given formatter.

impl From<&Lit> for ValueClass

fn from(lit: &Lit) -> Self

Converts to this type from the input type.

impl From<&Type> for ValueClass

fn from(ty: &Type) -> Self

Converts to this type from the input type.

impl From<Lit> for ValueClass

fn from(lit: Lit) -> Self

Converts to this type from the input type.

impl From<LiteralClass> for ValueClass

fn from(cls: LiteralClass) -> Self

Converts to this type from the input type.

impl From<Type> for ValueClass

fn from(ty: Type) -> Self

Converts to this type from the input type.

impl From<TypeClass> for ValueClass

fn from(cls: TypeClass) -> Self

Converts to this type from the input type.

impl Hash for ValueClass

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 Ord for ValueClass

fn cmp(&self, other: &ValueClass) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ValueClass

fn eq(&self, other: &ValueClass) -> 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 PartialOrd for ValueClass

fn partial_cmp(&self, other: &ValueClass) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for ValueClass

impl Eq for ValueClass

impl StructuralPartialEq for ValueClass

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 2 bytes

Size for each variant:

• Literal: 1 byte
• Type: 1 byte
• Expr: 0 bytes