Struct cfg_expr::targets::Env

source ·

pub struct Env(pub Cow<'static, str>);

Expand description

The “environment” field, which specifies an ABI environment on top of the operating system. In many configurations, this field is omitted, and the environment is implied by the operating system.

Tuple Fields§

§0: Cow<'static, str>

Implementations§

source §

pub fn new(val: impl Into<Cow<'static, str>>) -> Self

Constructs a new instance of this field.

This method accepts both owned Strings and &'static strs.

Examples found in repository ?

src/expr.rs (lines 449-451)

    fn to_pred<'a>(&self, s: &'a str) -> Predicate<'a> {
        use InnerPredicate as IP;
        use Predicate::{
            DebugAssertions, Feature, Flag, KeyValue, ProcMacro, Target, TargetFeature, Test,
        };

        match self {
            IP::Target(it) => match &it.which {
                Which::Abi => Target(TargetPredicate::Abi(targ::Abi::new(
                    s[it.span.clone().unwrap()].to_owned(),
                ))),
                Which::Arch => Target(TargetPredicate::Arch(targ::Arch::new(
                    s[it.span.clone().unwrap()].to_owned(),
                ))),
                Which::Os => Target(TargetPredicate::Os(targ::Os::new(
                    s[it.span.clone().unwrap()].to_owned(),
                ))),
                Which::Vendor => Target(TargetPredicate::Vendor(targ::Vendor::new(
                    s[it.span.clone().unwrap()].to_owned(),
                ))),
                Which::Env => Target(TargetPredicate::Env(targ::Env::new(
                    s[it.span.clone().unwrap()].to_owned(),
                ))),
                Which::Family => Target(TargetPredicate::Family(targ::Family::new(
                    s[it.span.clone().unwrap()].to_owned(),
                ))),
                Which::Endian(end) => Target(TargetPredicate::Endian(*end)),
                Which::HasAtomic(has_atomic) => Target(TargetPredicate::HasAtomic(*has_atomic)),
                Which::Panic => Target(TargetPredicate::Panic(targ::Panic::new(
                    s[it.span.clone().unwrap()].to_owned(),
                ))),
                Which::PointerWidth(pw) => Target(TargetPredicate::PointerWidth(*pw)),
            },
            IP::Test => Test,
            IP::DebugAssertions => DebugAssertions,
            IP::ProcMacro => ProcMacro,
            IP::Feature(rng) => Feature(&s[rng.clone()]),
            IP::TargetFeature(rng) => TargetFeature(&s[rng.clone()]),
            IP::Other { identifier, value } => match value {
                Some(vs) => KeyValue {
                    key: &s[identifier.clone()],
                    val: &s[vs.clone()],
                },
                None => Flag(&s[identifier.clone()]),
            },
        }
    }

source

pub const fn new_const(val: &'static str) -> Self

Constructs a new instance of this field from a &'static str.

Examples found in repository ?

src/targets/builtins.rs (line 2619)

    pub const eabihf: Env = Env::new_const("eabihf");
    pub const gnu: Env = Env::new_const("gnu");
    pub const gnueabihf: Env = Env::new_const("gnueabihf");
    pub const msvc: Env = Env::new_const("msvc");
    pub const musl: Env = Env::new_const("musl");
    pub const newlib: Env = Env::new_const("newlib");
    pub const relibc: Env = Env::new_const("relibc");
    pub const sgx: Env = Env::new_const("sgx");
    pub const uclibc: Env = Env::new_const("uclibc");