Function core::fmt::write

pub fn write(output: &mut dyn Write, args: Arguments<'_>) -> Result

write 函数接受一个输出流，以及一个可以与 format_args! 宏预编译的 Arguments 结构体。

参数将根据指定的格式字符串格式化为提供的输出流。

Examples

基本用法:

use std::fmt;

let mut output = String::new();
fmt::write(&mut output, format_args!("Hello {}!", "world"))
    .expect("Error occurred while trying to write in String");
assert_eq!(output, "Hello world!");

请注意，使用 write! 可能更可取。Example:

use std::fmt::Write;

let mut output = String::new();
write!(&mut output, "Hello {}!", "world")
    .expect("Error occurred while trying to write in String");
assert_eq!(output, "Hello world!");