Struct Features

pub struct Features {
    pub adt_const_params: bool,
    pub generic_const_exprs: bool,
    pub register_tool: bool,
    pub auto_traits: bool,
    pub negative_impls: bool,
    pub registered_tools: HashSet<String>,
}

A subset of rustc_feature::Features that is relevant to us

Fields

adt_const_params: bool

generic_const_exprs: bool

register_tool: bool

auto_traits: bool

negative_impls: bool

registered_tools: HashSet<String>

Implementations

impl Features

pub fn into_iter(&self) -> impl Iterator<Item = String>

pub fn detect(options: &Options, rustc_args: &Vec<String>) -> Self

Runs Rustc with a driver that only collects which unstable Rustc features are enabled

pub fn detect_forking() -> Self

Just like detect, but wraps the call in a subprocess so that we can capture stdout and stderr: we don’t want the use to see error message from Rustc twice, or Cargo to have to parse Rustc messages twice.

Trait Implementations

impl Clone for Features

fn clone(&self) -> Features

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Features

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

Formats the value using the given formatter.

impl Default for Features

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Features

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<&Features> for Features

fn from(rfeatures: &Features) -> Self

Converts to this type from the input type.

impl Serialize for Features

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Sub for Features

type Output = Features

The resulting type after applying the - operator.

fn sub(self, rhs: Self) -> Self

Performs the - operation.