assertables

Macro assert_len_lt_expr

source 
macro_rules! assert_len_lt_expr {
    ($a:expr, $b:expr $(,)?) => { ... };
    ($a:expr, $b:expr, $($message:tt)+) => { ... };
}
Expand description

Assert a length is less than an expression.

Pseudocode:
a.len() < b

  • If true, return ().

  • Otherwise, call panic! with a message and the values of the expressions with their debug representations.

§Examples

use assertables::*;

let a = "x";
let b = 2;
assert_len_lt_expr!(a, b);

let a = "xx";
let b = 1;
assert_len_lt_expr!(a, b);
// assertion failed: `assert_len_lt_expr!(a, b)`
// https://docs.rs/assertables/8.14.0/assertables/macro.assert_len_lt_expr.html
//  a label: `a`,
//  a debug: `\"xx\"`,
//  a.len(): `2`",
//  b label: `b`,
//  b debug: `1`

§Module macros