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use crate::error::Error;
use core::{fmt, str::FromStr};
#[cfg(feature = "serde")]
use serde::{de, ser, Deserialize, Serialize};
#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
#[non_exhaustive]
pub enum Env {
GNU,
MSVC,
Musl,
SGX,
#[allow(non_camel_case_types)]
uClibc,
Unknown,
}
impl Env {
pub fn as_str(self) -> &'static str {
match self {
Env::GNU => "gnu",
Env::MSVC => "msvc",
Env::Musl => "musl",
Env::SGX => "sgx",
Env::uClibc => "uclibc",
Env::Unknown => "unknown",
}
}
}
impl FromStr for Env {
type Err = Error;
fn from_str(env_name: &str) -> Result<Self, Self::Err> {
let env = match env_name {
"gnu" => Env::GNU,
"msvc" => Env::MSVC,
"musl" => Env::Musl,
"sgx" => Env::SGX,
"uclibc" => Env::uClibc,
_ => return Err(Error),
};
Ok(env)
}
}
impl fmt::Display for Env {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(self.as_str())
}
}
#[cfg(feature = "serde")]
impl Serialize for Env {
fn serialize<S: ser::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
serializer.serialize_str(self.as_str())
}
}
#[cfg(feature = "serde")]
impl<'de> Deserialize<'de> for Env {
fn deserialize<D: de::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
Ok(<&str>::deserialize(deserializer)?
.parse()
.unwrap_or(Env::Unknown))
}
}
#[cfg(target_env = "gnu")]
pub const TARGET_ENV: Option<Env> = Some(Env::GNU);
#[cfg(target_env = "msvc")]
pub const TARGET_ENV: Option<Env> = Some(Env::MSVC);
#[cfg(target_env = "musl")]
pub const TARGET_ENV: Option<Env> = Some(Env::Musl);
#[cfg(target_env = "sgx")]
pub const TARGET_ENV: Option<Env> = Some(Env::SGX);
#[cfg(target_env = "uclibc")]
pub const TARGET_ENV: Option<Env> = Some(Env::uClibc);
#[cfg(not(any(
target_env = "gnu",
target_env = "msvc",
target_env = "musl",
target_env = "sgx",
target_env = "uclibc",
)))]
pub const TARGET_ENV: Option<Env> = None;