Struct runtime_cfg::Cfg

pub struct Cfg(_);

Boolean evaluation of configuration flags, at runtime-time.

Methods

impl Cfg

pub fn find<'ast>(
    attrs: impl IntoIterator<Item = &'ast Attribute>
) -> Option<Cfg>

Find and parse the cfg attribute

pub fn parse<S: AsRef<str>>(s: S) -> Result<Self>

Parse the cfg attribute from meta

Methods from Deref<Target = Predicate>

pub fn matches<P: Pattern>(&self, pattern: &P) -> bool

Returns true if configuration matches the predicate

Trait Implementations

impl PartialEq<Cfg> for Cfg

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

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

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

This method tests for !=.

impl AsRef<Predicate> for Cfg

fn as_ref(&self) -> &Predicate

Performs the conversion.

impl From<Predicate> for Cfg

fn from(predicate: Predicate) -> Self

Performs the conversion.

impl From<Cfg> for Predicate

fn from(cfg: Cfg) -> Self

Performs the conversion.

impl Clone for Cfg

fn clone(&self) -> Cfg

Returns a copy of the value.

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

Performs copy-assignment from source.

impl AsMut<Predicate> for Cfg

fn as_mut(&mut self) -> &mut Predicate

Performs the conversion.

impl DerefMut for Cfg

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl Debug for Cfg

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

Formats the value using the given formatter.

impl Display for Cfg

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

Formats the value using the given formatter.

impl FromStr for Cfg

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl TryFrom<TokenStream> for Cfg

type Error = Error

The type returned in the event of a conversion error.

fn try_from(s: TokenStream) -> Result<Self, Self::Error>

Performs the conversion.

impl<'ast> TryFrom<&'ast Attribute> for Cfg

type Error = Error

The type returned in the event of a conversion error.

fn try_from(attr: &'ast Attribute) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Attribute> for Cfg

type Error = Error

The type returned in the event of a conversion error.

fn try_from(attr: Attribute) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<Meta> for Cfg

type Error = Error

The type returned in the event of a conversion error.

fn try_from(meta: Meta) -> Result<Self, Self::Error>

Performs the conversion.

impl Deref for Cfg

type Target = Predicate

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for Cfg

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, 

Feeds a slice of this type into the given [Hasher].

impl Parse for Cfg

fn parse(input: ParseStream) -> Result<Self>