Crate more_asserts

Small library providing some macros helpful for asserting. The API is very similar to the API provided by the stdlib’s own assert_eq!, assert_ne!, debug_assert_eq!, or debug_assert_ne!.

Name	Enabled	Equivalent to
assert_le!	Always	assert!(a <= b)
assert_lt!	Always	assert!(a < b)
assert_ge!	Always	assert!(a >= b)
assert_gt!	Always	assert!(a > b)
debug_assert_le!	if cfg!(debug_assertions)	debug_assert!(a <= b)
debug_assert_lt!	if cfg!(debug_assertions)	debug_assert!(a < b)
debug_assert_ge!	if cfg!(debug_assertions)	debug_assert!(a >= b)
debug_assert_gt!	if cfg!(debug_assertions)	debug_assert!(a > b)
debug_unreachable!	if cfg!(debug_assertions)	unreachable! when debug_assertions are on.

When one of the assertions fails, it prints out a message like the following:

thread 'main' panicked at 'assertion failed: `left < right`
 left: `4`,
right: `3`', src/main.rs:47:5
note: Run with `RUST_BACKTRACE=1` for a backtrace.

Example

#[macro_use]
extern crate more_asserts;

#[derive(Debug, PartialEq, PartialOrd)]
enum Example { Foo, Bar }

fn main() {
    assert_le!(3, 4);
    assert_ge!(10, 10,
               "You can pass a message too (just like `assert_eq!`)");
    debug_assert_lt!(1.3, 4.5,
        "Format syntax is supported ({}).", "also like `assert_eq!`");

    assert_gt!(Example::Bar, Example::Foo,
        "It works on anything that implements PartialOrd, PartialEq, and Debug!");
}

Macros

assert_ge	Panics if the first expression is not greater than or equal to the second. Requires that the values be comparable with >=.
assert_gt	Panics if the first expression is not strictly greater than the second. Requires that the values be comparable with >.
assert_le	Panics if the first expression is not less than or equal to the second. Requires that the values be comparable with <=.
assert_lt	Panics if the first expression is not strictly less than the second. Requires that the values be comparable with <.
debug_assert_ge	Same as assert_ge! in debug builds or release builds where the -C debug-assertions was provided to the compiler. For all other builds, vanishes without a trace.
debug_assert_gt	Same as assert_gt! in debug builds or release builds where the -C debug-assertions was provided to the compiler. For all other builds, vanishes without a trace.
debug_assert_le	Same as assert_le! in debug builds or release builds where the -C debug-assertions was provided to the compiler. For all other builds, vanishes without a trace.
debug_assert_lt	Same as assert_lt! in debug builds or release builds where the -C debug-assertions was provided to the compiler. For all other builds, vanishes without a trace.
debug_unreachable	Panics if reached. This is a variant of the standard library’s unreachable! macro that is controlled by cfg!(debug_assertions).