Struct boa::property::Attribute

pub struct Attribute { /* fields omitted */ }

This struct constains the property flags as describen in the ECMAScript specification.

It contains the following flags:

• [[Writable]] (WRITABLE) - If false, attempts by ECMAScript code to change the property's [[Value]] attribute using [[Set]] will not succeed.
• [[Enumerable]] (ENUMERABLE) - If the property will be enumerated by a for-in enumeration.
• [[Configurable]] (CONFIGURABLE) - If false, attempts to delete the property, change the property to be an accessor property, or change its attributes (other than [[Value]], or changing [[Writable]] to false) will fail.

Implementations

impl Attribute

pub const WRITABLE: Attribute

The Writable attribute decides whether the value associated with the property can be changed or not, from its initial value.

pub const ENUMERABLE: Attribute

If the property can be enumerated by a for-in loop.

pub const CONFIGURABLE: Attribute

If the property descriptor can be changed later.

pub const READONLY: Attribute

The property is not writable.

pub const NON_ENUMERABLE: Attribute

The property can not be enumerated in a for-in loop.

pub const PERMANENT: Attribute

The property descriptor cannot be changed.

pub const fn empty() -> Attribute

Returns an empty set of flags

pub const fn all() -> Attribute

Returns the set containing all flags.

pub const fn bits(&self) -> u8

Returns the raw value of the flags currently stored.

pub fn from_bits(bits: u8) -> Option<Attribute>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

pub const fn from_bits_truncate(bits: u8) -> Attribute

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

pub const unsafe fn from_bits_unchecked(bits: u8) -> Attribute

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

pub const fn is_all(&self) -> bool

Returns true if all flags are currently set.

pub const fn intersects(&self, other: Attribute) -> bool

Returns true if there are flags common to both self and other.

pub const fn contains(&self, other: Attribute) -> bool

Returns true all of the flags in other are contained within self.

pub fn insert(&mut self, other: Attribute)

Inserts the specified flags in-place.

pub fn remove(&mut self, other: Attribute)

Removes the specified flags in-place.

pub fn toggle(&mut self, other: Attribute)

Toggles the specified flags in-place.

pub fn set(&mut self, other: Attribute, value: bool)

Inserts or removes the specified flags depending on the passed value.

impl Attribute

pub fn clear(&mut self)

Clear all flags.

pub fn set_writable(&mut self, value: bool)

Sets the writable flag.

pub fn writable(self) -> bool

Gets the writable flag.

pub fn set_enumerable(&mut self, value: bool)

Sets the enumerable flag.

pub fn enumerable(self) -> bool

Gets the enumerable flag.

pub fn set_configurable(&mut self, value: bool)

Sets the configurable flag.

pub fn configurable(self) -> bool

Gets the configurable flag.

Trait Implementations

impl Binary for Attribute

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

Formats the value using the given formatter.

impl BitAnd<Attribute> for Attribute

type Output = Attribute

The resulting type after applying the & operator.

pub fn bitand(self, other: Attribute) -> Attribute

Returns the intersection between the two sets of flags.

impl BitAndAssign<Attribute> for Attribute

pub fn bitand_assign(&mut self, other: Attribute)

Disables all flags disabled in the set.

impl BitOr<Attribute> for Attribute

type Output = Attribute

The resulting type after applying the | operator.

pub fn bitor(self, other: Attribute) -> Attribute

Returns the union of the two sets of flags.

impl BitOrAssign<Attribute> for Attribute

pub fn bitor_assign(&mut self, other: Attribute)

Adds the set of flags.

impl BitXor<Attribute> for Attribute

type Output = Attribute

The resulting type after applying the ^ operator.

pub fn bitxor(self, other: Attribute) -> Attribute

Returns the left flags, but with all the right flags toggled.

impl BitXorAssign<Attribute> for Attribute

pub fn bitxor_assign(&mut self, other: Attribute)

Toggles the set of flags.

impl Clone for Attribute

pub fn clone(&self) -> Attribute

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Attribute

impl Debug for Attribute

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

Formats the value using the given formatter.

impl Default for Attribute

pub fn default() -> Self

Returns the default flags according to the ECMAScript specification.

impl Eq for Attribute

impl Extend<Attribute> for Attribute

pub fn extend<T: IntoIterator<Item = Attribute>>(&mut self, iterator: T)

Extends a collection with the contents of an iterator.

pub fn extend_one(&mut self, item: A)

🔬 This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

pub fn extend_reserve(&mut self, additional: usize)

🔬 This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl Finalize for Attribute

pub fn finalize(&self)

impl FromIterator<Attribute> for Attribute

pub fn from_iter<T: IntoIterator<Item = Attribute>>(iterator: T) -> Attribute

Creates a value from an iterator.

impl Hash for Attribute

pub fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl LowerHex for Attribute

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

Formats the value using the given formatter.

impl Not for Attribute

type Output = Attribute

The resulting type after applying the ! operator.

pub fn not(self) -> Attribute

Returns the complement of this set of flags.

impl Octal for Attribute

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

Formats the value using the given formatter.

impl Ord for Attribute

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

This method returns an Ordering between self and other.

#[must_use]pub fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]pub fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<Attribute> for Attribute

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

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

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

This method tests for !=.

impl PartialOrd<Attribute> for Attribute

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl StructuralEq for Attribute

impl StructuralPartialEq for Attribute

impl Sub<Attribute> for Attribute

type Output = Attribute

The resulting type after applying the - operator.

pub fn sub(self, other: Attribute) -> Attribute

Returns the set difference of the two sets of flags.

impl SubAssign<Attribute> for Attribute

pub fn sub_assign(&mut self, other: Attribute)

Disables all flags enabled in the set.

impl Trace for Attribute

pub unsafe fn trace(&self)

Marks all contained Gcs.

pub unsafe fn root(&self)

Increments the root-count of all contained Gcs.

pub unsafe fn unroot(&self)

Decrements the root-count of all contained Gcs.

pub fn finalize_glue(&self)

Runs Finalize::finalize() on this object and all contained subobjects

impl UpperHex for Attribute

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

Formats the value using the given formatter.