Struct read_with::ReadWith [−][src]
pub struct ReadWith<F, S> where
F: FnMut() -> Option<S>,
S: AsRef<[u8]> + Default, { /* fields omitted */ }
An object that implements the Read
trait
Methods
impl<F, S> ReadWith<F, S> where
F: FnMut() -> Option<S>,
S: AsRef<[u8]> + Default,
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impl<F, S> ReadWith<F, S> where
F: FnMut() -> Option<S>,
S: AsRef<[u8]> + Default,
pub fn new(f: F) -> Self
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pub fn new(f: F) -> Self
Create an object that will read from the given function.
Keeps on reading from f
until it returns a None.
The function may return anything that can be turned into
a &[u8]
which includes String
and &str
.
Trait Implementations
impl<F, S> Read for ReadWith<F, S> where
F: FnMut() -> Option<S>,
S: AsRef<[u8]> + Default,
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impl<F, S> Read for ReadWith<F, S> where
F: FnMut() -> Option<S>,
S: AsRef<[u8]> + Default,
fn read(&mut self, buf: &mut [u8]) -> Result<usize>
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fn read(&mut self, buf: &mut [u8]) -> Result<usize>
Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more
unsafe fn initializer(&self) -> Initializer
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unsafe fn initializer(&self) -> Initializer
read_initializer
)Determines if this Read
er can work with buffers of uninitialized memory. Read more
fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>
1.0.0[src]
fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>
Read all bytes until EOF in this source, placing them into buf
. Read more
fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
1.0.0[src]
fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
Read all bytes until EOF in this source, appending them to buf
. Read more
fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
1.6.0[src]
fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
Read the exact number of bytes required to fill buf
. Read more
fn by_ref(&mut self) -> &mut Self
1.0.0[src]
fn by_ref(&mut self) -> &mut Self
Creates a "by reference" adaptor for this instance of Read
. Read more
fn bytes(self) -> Bytes<Self>
1.0.0[src]
fn bytes(self) -> Bytes<Self>
Transforms this Read
instance to an [Iterator
] over its bytes. Read more
fn chars(self) -> Chars<Self>
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fn chars(self) -> Chars<Self>
: Use str::from_utf8 instead: https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
🔬 This is a nightly-only experimental API. (io
)
the semantics of a partial read/write of where errors happen is currently unclear and may change
Transforms this Read
instance to an [Iterator
] over [char
]s. Read more
fn chain<R>(self, next: R) -> Chain<Self, R> where
R: Read,
1.0.0[src]
fn chain<R>(self, next: R) -> Chain<Self, R> where
R: Read,
Creates an adaptor which will chain this stream with another. Read more
fn take(self, limit: u64) -> Take<Self>
1.0.0[src]
fn take(self, limit: u64) -> Take<Self>
Creates an adaptor which will read at most limit
bytes from it. Read more