Function fmt_cmp::cmp::cmp [−][src]
Expand description
Compares two values in their Display
representations.
This yields the same result as lhs.to_string().cmp(&rhs.to_string())
without heap allocation.
Note
This may call Display::fmt
multiple times and if it emits different strings between the calls,
the resulting Ordering
value is unspecified.
Also, the Display
implementations may not return error as described by the documentation of
std::fmt
. Doing so would result in an unspecified Ordering
value or might even cause
a panic in a future version.
Examples
Comparing digits of integers lexicographically:
assert!(fmt_cmp::cmp(&42, &240).is_gt());
Comparing format_args!
:
assert!(fmt_cmp::cmp(&format_args!("{:X}", 0x2A), &format_args!("{:X}", 0x9)).is_le());