Macro assert_cmp::debug_assert_op

macro_rules! debug_assert_op {
    ($left:ident $op:tt $right:ident) => { ... };
    ($left:ident $op:tt $right:literal) => { ... };
    ($left:literal $op:tt $right:ident) => { ... };
    ($left:literal $op:tt $right:literal) => { ... };
}

Assert that a binary expression of 2 identifiers/literals returns true.

This macro is the debug-only version of assert_op. It acts like assert_op in debug mode, but does nothing in release mode.