Function alloc::fmt::write 1.0.0[−][src]
pub fn write(output: &mut dyn Write, args: Arguments<'_>) -> Result<(), Error>
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