Struct CfgSet

pub struct CfgSet(/* private fields */);

Set of #[cfg(...)] options.

Behaves like a multimap, i.e. it permits storing multiple values for the same key. This allows expressing, for example, the feature option that Rust/Cargo does.

Implementations

impl CfgSet

pub fn new() -> Self

Creates an empty CfgSet.

This function does not allocate.

pub fn len(&self) -> usize

Returns the number of elements in the set.

pub fn is_empty(&self) -> bool

Returns true if the set contains no elements.

pub fn insert(&mut self, cfg: Cfg)

Adds a value to the set.

pub fn union(&self, other: &Self) -> Self

Combines two sets into new one.

pub fn iter(&self) -> impl Iterator<Item = &Cfg>

An iterator visiting all elements in insertion order.

pub fn contains(&self, cfg: &Cfg) -> bool

Returns true if the set contains a value.

pub fn is_subset(&self, other: &Self) -> bool

Returns true if the set is a subset of another, i.e., other contains at least all the values in self.

pub fn is_superset(&self, other: &Self) -> bool

Returns true if the set is a superset of another, i.e., self contains at least all the values in other.

Trait Implementations

impl Clone for CfgSet

fn clone(&self) -> CfgSet

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CfgSet

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

Formats the value using the given formatter.

impl Default for CfgSet

fn default() -> CfgSet

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CfgSet

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl FromIterator<Cfg> for CfgSet

fn from_iter<T: IntoIterator<Item = Cfg>>(iter: T) -> Self

Creates a value from an iterator.

impl Hash for CfgSet

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<'a> IntoIterator for &'a CfgSet

type Item = &'a Cfg

The type of the elements being iterated over.

type IntoIter = <&'a BTreeSet<Cfg> as IntoIterator>::IntoIter

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl IntoIterator for CfgSet

type Item = Cfg

The type of the elements being iterated over.

type IntoIter = <BTreeSet<Cfg> as IntoIterator>::IntoIter

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl PartialEq for CfgSet

fn eq(&self, other: &CfgSet) -> 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 Serialize for CfgSet

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for CfgSet

impl StructuralPartialEq for CfgSet