Struct Cursor 

pub struct Cursor<T> { /* private fields */ }

A cursor-like writer structure returned by FStr::writer_at.

See the FStr::writer_at documentation for the detailed behavior of this type’s fmt::Write implementation.

Examples

use core::fmt::Write as _;

let mut buffer = FStr::<20>::from_ascii_filler(b'.');
assert_eq!(buffer, "....................");

let mut cursor = buffer.writer_at(0);
assert_eq!(cursor.position(), 0);
assert_eq!(&cursor.get_ref()[..], "....................");

write!(cursor, "gentle")?;
assert_eq!(cursor.position(), 6);
assert_eq!(&cursor.get_ref()[..], "gentle..............");

write!(cursor, " flamingo")?;
assert_eq!(cursor.position(), 15);
assert_eq!(&cursor.get_ref()[..], "gentle flamingo.....");

assert_eq!(
    cursor.get_ref().split_at(cursor.position()),
    ("gentle flamingo", ".....")
);

assert_eq!(buffer, "gentle flamingo.....");

Implementations

impl<T> Cursor<T>

pub fn get_ref(&self) -> &T

Gets a reference to the underlying value in this cursor.

pub fn position(&self) -> usize

Returns the current position of this cursor.

Trait Implementations

impl<T: Debug> Debug for Cursor<T>

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

Formats the value using the given formatter.

impl<T: AsMut<str>> Write for Cursor<T>

fn write_str(&mut self, s: &str) -> Result

Writes a string slice into this writer, returning whether the write succeeded.

fn write_char(&mut self, c: char) -> Result<(), Error>

Writes a char into this writer, returning whether the write succeeded.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Glue for usage of the write! macro with implementors of this trait.