std::format_args!

macro_rules! format_args { ($fmt:expr, $($args:tt)*) => ({
        /* compiler built-in */
    }) }

The core macro for formatted string creation & output.

This macro produces a value of type fmt::Arguments. This value can be passed to the functions in std::fmt for performing useful functions. All other formatting macros (format!, write!, println!, etc) are proxied through this one.

For more information, see the documentation in std::fmt.

Example

fn main() { use std::fmt; let s = fmt::format(format_args!("hello {}", "world")); assert_eq!(s, format!("hello {}", "world")); }

use std::fmt;

let s = fmt::format(format_args!("hello {}", "world"));
assert_eq!(s, format!("hello {}", "world"));