Macro truncate_long 

macro_rules! truncate_long {
    ($query:expr) => { ... };
}

Truncate long strings for logging and error messages purpose.

Returns a format_args! that yields at most 497 characters from the start of the input followed by ... when truncation occurred. Minimal overhead.

Examples

use tank_core::truncate_long;
let short = "SELECT 1";
assert_eq!(format!("{}", truncate_long!(short)), "SELECT 1\n");
let long = format!("SELECT {}", "X".repeat(600));
let logged = format!("{}", truncate_long!(long));
assert!(logged.starts_with("SELECT XXXXXX"));
assert!(logged.ends_with("...\n"));