pub trait Env: Send + Sync {
Show 40 methods
// Required methods
fn all(&self) -> HashMap<String, String>;
fn bool(&self, key: &str) -> Option<Result<bool, ParseBoolError>>;
fn char(&self, key: &str) -> Option<Result<char, ParseCharError>>;
fn f32(&self, key: &str) -> Option<Result<f32, ParseFloatError>>;
fn f64(&self, key: &str) -> Option<Result<f64, ParseFloatError>>;
fn i8(&self, key: &str) -> Option<Result<i8, ParseIntError>>;
fn i16(&self, key: &str) -> Option<Result<i16, ParseIntError>>;
fn i32(&self, key: &str) -> Option<Result<i32, ParseIntError>>;
fn i64(&self, key: &str) -> Option<Result<i64, ParseIntError>>;
fn i128(&self, key: &str) -> Option<Result<i128, ParseIntError>>;
fn ip_addr(&self, key: &str) -> Option<Result<IpAddr, AddrParseError>>;
fn ipv4_addr(&self, key: &str) -> Option<Result<Ipv4Addr, AddrParseError>>;
fn ipv6_addr(&self, key: &str) -> Option<Result<Ipv6Addr, AddrParseError>>;
fn isize(&self, key: &str) -> Option<Result<isize, ParseIntError>>;
fn non_zero_i8(&self, key: &str) -> Option<Result<NonZeroI8, ParseIntError>>;
fn non_zero_i16(
&self,
key: &str
) -> Option<Result<NonZeroI16, ParseIntError>>;
fn non_zero_i32(
&self,
key: &str
) -> Option<Result<NonZeroI32, ParseIntError>>;
fn non_zero_i64(
&self,
key: &str
) -> Option<Result<NonZeroI64, ParseIntError>>;
fn non_zero_i128(
&self,
key: &str
) -> Option<Result<NonZeroI128, ParseIntError>>;
fn non_zero_isize(
&self,
key: &str
) -> Option<Result<NonZeroIsize, ParseIntError>>;
fn non_zero_u8(&self, key: &str) -> Option<Result<NonZeroU8, ParseIntError>>;
fn non_zero_u16(
&self,
key: &str
) -> Option<Result<NonZeroU16, ParseIntError>>;
fn non_zero_u32(
&self,
key: &str
) -> Option<Result<NonZeroU32, ParseIntError>>;
fn non_zero_u64(
&self,
key: &str
) -> Option<Result<NonZeroU64, ParseIntError>>;
fn non_zero_u128(
&self,
key: &str
) -> Option<Result<NonZeroU128, ParseIntError>>;
fn non_zero_usize(
&self,
key: &str
) -> Option<Result<NonZeroUsize, ParseIntError>>;
fn os_string(&self, key: &str) -> Option<OsString>;
fn path_buf(&self, key: &str) -> Option<PathBuf>;
fn raw(&self, key: &str) -> Result<String, VarError>;
fn socket_addr(
&self,
key: &str
) -> Option<Result<SocketAddr, AddrParseError>>;
fn socket_addr_v4(
&self,
key: &str
) -> Option<Result<SocketAddrV4, AddrParseError>>;
fn socket_addr_v6(
&self,
key: &str
) -> Option<Result<SocketAddrV6, AddrParseError>>;
fn string(&self, key: &str) -> Option<String>;
fn strings(&self, key: &str, sep: &str) -> Option<Vec<String>>;
fn u8(&self, key: &str) -> Option<Result<u8, ParseIntError>>;
fn u16(&self, key: &str) -> Option<Result<u16, ParseIntError>>;
fn u32(&self, key: &str) -> Option<Result<u32, ParseIntError>>;
fn u64(&self, key: &str) -> Option<Result<u64, ParseIntError>>;
fn u128(&self, key: &str) -> Option<Result<u128, ParseIntError>>;
fn usize(&self, key: &str) -> Option<Result<usize, ParseIntError>>;
}Expand description
A trait for getting environment variables.
Required Methods§
sourcefn all(&self) -> HashMap<String, String>
fn all(&self) -> HashMap<String, String>
Returns all environment variables.
See std::env::vars for more details.
sourcefn bool(&self, key: &str) -> Option<Result<bool, ParseBoolError>>
fn bool(&self, key: &str) -> Option<Result<bool, ParseBoolError>>
Returns the value of the environment variable key as a bool.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid bool, an error is returned.
sourcefn char(&self, key: &str) -> Option<Result<char, ParseCharError>>
fn char(&self, key: &str) -> Option<Result<char, ParseCharError>>
Returns the value of the environment variable key as a char.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid char, an error is returned.
sourcefn f32(&self, key: &str) -> Option<Result<f32, ParseFloatError>>
fn f32(&self, key: &str) -> Option<Result<f32, ParseFloatError>>
Returns the value of the environment variable key as a f32.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid f32, an error is returned.
sourcefn f64(&self, key: &str) -> Option<Result<f64, ParseFloatError>>
fn f64(&self, key: &str) -> Option<Result<f64, ParseFloatError>>
Returns the value of the environment variable key as a f64.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid f64, an error is returned.
sourcefn i8(&self, key: &str) -> Option<Result<i8, ParseIntError>>
fn i8(&self, key: &str) -> Option<Result<i8, ParseIntError>>
Returns the value of the environment variable key as a i8.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid i8, an error is returned.
sourcefn i16(&self, key: &str) -> Option<Result<i16, ParseIntError>>
fn i16(&self, key: &str) -> Option<Result<i16, ParseIntError>>
Returns the value of the environment variable key as a i16.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid i16, an error is returned.
sourcefn i32(&self, key: &str) -> Option<Result<i32, ParseIntError>>
fn i32(&self, key: &str) -> Option<Result<i32, ParseIntError>>
Returns the value of the environment variable key as a i32.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid i32, an error is returned.
sourcefn i64(&self, key: &str) -> Option<Result<i64, ParseIntError>>
fn i64(&self, key: &str) -> Option<Result<i64, ParseIntError>>
Returns the value of the environment variable key as a i64.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid i64, an error is returned.
sourcefn i128(&self, key: &str) -> Option<Result<i128, ParseIntError>>
fn i128(&self, key: &str) -> Option<Result<i128, ParseIntError>>
Returns the value of the environment variable key as a i128.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid i128, an error is returned.
sourcefn ip_addr(&self, key: &str) -> Option<Result<IpAddr, AddrParseError>>
fn ip_addr(&self, key: &str) -> Option<Result<IpAddr, AddrParseError>>
Returns the value of the environment variable key as a IpAddr.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid IpAddr, an error is returned.
sourcefn ipv4_addr(&self, key: &str) -> Option<Result<Ipv4Addr, AddrParseError>>
fn ipv4_addr(&self, key: &str) -> Option<Result<Ipv4Addr, AddrParseError>>
Returns the value of the environment variable key as a Ipv4Addr.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid Ipv4Addr, an error is returned.
sourcefn ipv6_addr(&self, key: &str) -> Option<Result<Ipv6Addr, AddrParseError>>
fn ipv6_addr(&self, key: &str) -> Option<Result<Ipv6Addr, AddrParseError>>
Returns the value of the environment variable key as a Ipv6Addr.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid Ipv6Addr, an error is returned.
sourcefn isize(&self, key: &str) -> Option<Result<isize, ParseIntError>>
fn isize(&self, key: &str) -> Option<Result<isize, ParseIntError>>
Returns the value of the environment variable key as a isize.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid isize, an error is returned.
sourcefn non_zero_i8(&self, key: &str) -> Option<Result<NonZeroI8, ParseIntError>>
fn non_zero_i8(&self, key: &str) -> Option<Result<NonZeroI8, ParseIntError>>
Returns the value of the environment variable key as a NonZeroI8.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroI8, an error is returned.
sourcefn non_zero_i16(&self, key: &str) -> Option<Result<NonZeroI16, ParseIntError>>
fn non_zero_i16(&self, key: &str) -> Option<Result<NonZeroI16, ParseIntError>>
Returns the value of the environment variable key as a NonZeroI16.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroI16, an error is returned.
sourcefn non_zero_i32(&self, key: &str) -> Option<Result<NonZeroI32, ParseIntError>>
fn non_zero_i32(&self, key: &str) -> Option<Result<NonZeroI32, ParseIntError>>
Returns the value of the environment variable key as a NonZeroI32.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroI32, an error is returned.
sourcefn non_zero_i64(&self, key: &str) -> Option<Result<NonZeroI64, ParseIntError>>
fn non_zero_i64(&self, key: &str) -> Option<Result<NonZeroI64, ParseIntError>>
Returns the value of the environment variable key as a NonZeroI64.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroI64, an error is returned.
sourcefn non_zero_i128(&self, key: &str) -> Option<Result<NonZeroI128, ParseIntError>>
fn non_zero_i128(&self, key: &str) -> Option<Result<NonZeroI128, ParseIntError>>
Returns the value of the environment variable key as a NonZeroI128.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroI128, an error is returned.
sourcefn non_zero_isize(
&self,
key: &str
) -> Option<Result<NonZeroIsize, ParseIntError>>
fn non_zero_isize( &self, key: &str ) -> Option<Result<NonZeroIsize, ParseIntError>>
Returns the value of the environment variable key as a NonZeroIsize.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroIsize, an error is returned.
sourcefn non_zero_u8(&self, key: &str) -> Option<Result<NonZeroU8, ParseIntError>>
fn non_zero_u8(&self, key: &str) -> Option<Result<NonZeroU8, ParseIntError>>
Returns the value of the environment variable key as a NonZeroU8.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroU8, an error is returned.
sourcefn non_zero_u16(&self, key: &str) -> Option<Result<NonZeroU16, ParseIntError>>
fn non_zero_u16(&self, key: &str) -> Option<Result<NonZeroU16, ParseIntError>>
Returns the value of the environment variable key as a NonZeroU16.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroU16, an error is returned.
sourcefn non_zero_u32(&self, key: &str) -> Option<Result<NonZeroU32, ParseIntError>>
fn non_zero_u32(&self, key: &str) -> Option<Result<NonZeroU32, ParseIntError>>
Returns the value of the environment variable key as a NonZeroU32.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroU32, an error is returned.
sourcefn non_zero_u64(&self, key: &str) -> Option<Result<NonZeroU64, ParseIntError>>
fn non_zero_u64(&self, key: &str) -> Option<Result<NonZeroU64, ParseIntError>>
Returns the value of the environment variable key as a NonZeroU64.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroU64, an error is returned.
sourcefn non_zero_u128(&self, key: &str) -> Option<Result<NonZeroU128, ParseIntError>>
fn non_zero_u128(&self, key: &str) -> Option<Result<NonZeroU128, ParseIntError>>
Returns the value of the environment variable key as a NonZeroU128.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroU128, an error is returned.
sourcefn non_zero_usize(
&self,
key: &str
) -> Option<Result<NonZeroUsize, ParseIntError>>
fn non_zero_usize( &self, key: &str ) -> Option<Result<NonZeroUsize, ParseIntError>>
Returns the value of the environment variable key as a NonZeroUsize.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid NonZeroUsize, an error is returned.
sourcefn os_string(&self, key: &str) -> Option<OsString>
fn os_string(&self, key: &str) -> Option<OsString>
Returns the value of the environment variable key as a OsString.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid OsString, an error is returned.
sourcefn path_buf(&self, key: &str) -> Option<PathBuf>
fn path_buf(&self, key: &str) -> Option<PathBuf>
Returns the value of the environment variable key as a PathBuf.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid PathBuf, an error is returned.
sourcefn raw(&self, key: &str) -> Result<String, VarError>
fn raw(&self, key: &str) -> Result<String, VarError>
Returns the value of the environment variable key as a String.
If the environment variable is not present or it is not a valid unicode, an error is returned.
See std::env::var for more details.
sourcefn socket_addr(&self, key: &str) -> Option<Result<SocketAddr, AddrParseError>>
fn socket_addr(&self, key: &str) -> Option<Result<SocketAddr, AddrParseError>>
Returns the value of the environment variable key as a SocketAddr.
If the environment variable is not present, None is returned.
If the environment variable is not a valid SocketAddr, an error is returned.
sourcefn socket_addr_v4(
&self,
key: &str
) -> Option<Result<SocketAddrV4, AddrParseError>>
fn socket_addr_v4( &self, key: &str ) -> Option<Result<SocketAddrV4, AddrParseError>>
Returns the value of the environment variable key as a SocketAddrV4.
If the environment variable is not present, None is returned.
If the environment variable is not a valid SocketAddrV4, an error is returned.
sourcefn socket_addr_v6(
&self,
key: &str
) -> Option<Result<SocketAddrV6, AddrParseError>>
fn socket_addr_v6( &self, key: &str ) -> Option<Result<SocketAddrV6, AddrParseError>>
Returns the value of the environment variable key as a SocketAddrV6.
If the environment variable is not present, None is returned.
If the environment variable is not a valid SocketAddrV6, an error is returned.
sourcefn string(&self, key: &str) -> Option<String>
fn string(&self, key: &str) -> Option<String>
Returns the value of the environment variable key as a String.
If the environment variable is not present or it is not a valid unicode, None is returned.
sourcefn strings(&self, key: &str, sep: &str) -> Option<Vec<String>>
fn strings(&self, key: &str, sep: &str) -> Option<Vec<String>>
Returns the value of the environment variable key as a Vec<String>.
The value is split by sep and each item is trimmed.
If the environment variable is not present or it is not a valid unicode, None is returned.
sourcefn u8(&self, key: &str) -> Option<Result<u8, ParseIntError>>
fn u8(&self, key: &str) -> Option<Result<u8, ParseIntError>>
Returns the value of the environment variable key as a u8.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid u8, an error is returned.
sourcefn u16(&self, key: &str) -> Option<Result<u16, ParseIntError>>
fn u16(&self, key: &str) -> Option<Result<u16, ParseIntError>>
Returns the value of the environment variable key as a u16.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid u16, an error is returned.
sourcefn u32(&self, key: &str) -> Option<Result<u32, ParseIntError>>
fn u32(&self, key: &str) -> Option<Result<u32, ParseIntError>>
Returns the value of the environment variable key as a u32.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid u32, an error is returned.
sourcefn u64(&self, key: &str) -> Option<Result<u64, ParseIntError>>
fn u64(&self, key: &str) -> Option<Result<u64, ParseIntError>>
Returns the value of the environment variable key as a u64.
If the environment variable is not present or it is not a valid unicode, None is returned.
If the environment variable is not a valid u64, an error is returned.