Enum build_target::Env

#[non_exhaustive]
pub enum Env<'a> {
    GNU,
    MSVC,
    Musl,
    SGX,
    uClibc,
    Other(Cow<'a, str>),
}

Target enviroment that disambiguates the target platform by ABI / libc.

Note

This value is closely related to the fourth element of the platform target triple, though it is not identical. For example, embedded ABIs such as gnueabihf will simply define target_env as "gnu" (i.e. Env::GNU)

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

GNU

gnu: The GNU C Library (glibc)

MSVC

msvc: Microsoft Visual C(++)

Musl

musl: Clean, efficient, standards-conformant libc implementation.

SGX

sgx: Intel Software Guard Extensions (SGX) Enclave

uClibc

uclibc: C library for developing embedded Linux systems

Other(Cow<'a, str>)

Unknown target environment

Tuple Fields of Other

0: Cow<'a, str>

Implementations

impl<'a> Env<'a>

pub fn as_str(&self) -> &str

String representing this environment which matches #[cfg(target_env)].

pub fn target() -> Result<Self, VarError>

Gets the current target Env.

Trait Implementations

impl<'a> Clone for Env<'a>

fn clone(&self) -> Env<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Env<'a>

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

Formats the value using the given formatter.

impl<'a> Display for Env<'a>

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

Formats the value using the given formatter.

impl<'a> Hash for Env<'a>

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<'a> Ord for Env<'a>

fn cmp(&self, other: &Env<'a>) -> Ordering

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl<'a> PartialEq<Env<'a>> for Env<'a>

fn eq(&self, other: &Env<'a>) -> bool

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

fn ne(&self, other: &Env<'a>) -> bool

This method tests for !=.

impl<'a> PartialOrd<Env<'a>> for Env<'a>

fn partial_cmp(&self, other: &Env<'a>) -> Option<Ordering>

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

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

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

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

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

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

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

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

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

impl<'a> Eq for Env<'a>

impl<'a> StructuralEq for Env<'a>

impl<'a> StructuralPartialEq for Env<'a>