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

This method can only succeed if the entire string slice was successfullywritten, and this method will not return until all data has beenwritten or an error occurs.

§Errors

This function will return an instance ofstd::fmt::Error on error.

The purpose of that error is to abort the formatting operation when the underlyingdestination encounters some error preventing it from accepting more text;in particular, it does not communicate any information aboutwhat error occurred.It should generally be propagated rather than handled, at least when implementingformatting traits.

§Examples

usestd::fmt::{Error, Write};fnwriter<W: Write>(f:&mutW, s:&str) ->Result<(), Error> {    f.write_str(s)}letmutbuf = String::new();writer(&mutbuf,"hola")?;assert_eq!(&buf,"hola");

Writes achar into this writer, returning whether the write succeeded.

A singlechar may be encoded as more than one byte.This method can only succeed if the entire byte sequence was successfullywritten, and this method will not return until all data has beenwritten or an error occurs.

§Errors

This function will return an instance ofError on error.

§Examples

usestd::fmt::{Error, Write};fnwriter<W: Write>(f:&mutW, c: char) ->Result<(), Error> {    f.write_char(c)}letmutbuf = String::new();writer(&mutbuf,'a')?;writer(&mutbuf,'b')?;assert_eq!(&buf,"ab");

Glue for usage of thewrite! macro with implementors of this trait.

This method should generally not be invoked manually, but rather throughthewrite! macro itself.

§Errors

This function will return an instance ofError on error. Please seewrite_str for details.

§Examples

usestd::fmt::{Error, Write};fnwriter<W: Write>(f:&mutW, s:&str) ->Result<(), Error> {    f.write_fmt(format_args!("{s}"))}letmutbuf = String::new();writer(&mutbuf,"world")?;assert_eq!(&buf,"world");