pub fn write(output: &mut dyn Write, args: Arguments<'_>) -> Result
Expand description
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!");
Run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!");
Run