Assure: macros for Rust runtime checks and error handling

This Rust crate provides the macro assure! and its friends. These are similar to the macro assert! and its friends.

assure!(condition) will return Result with Ok(true) or Err(message).
assert!(condition) will return successfully or will call panic!.

Macros for simple values

Macro for truth checking:

assure!(a): assure a is true.

Macros for value comparison:

assure_eq!(a, b): assure a is equal to b.
assure_ne!(a, b): assure a is not equal to b.
assure_lt!(a, b): assure a is less than b.
assure_le!(a, b): assure a is less than or equal to b.
assure_gt!(a, b): assure a is greater than b.
assure_ge!(a, b): assure a is greater than or equal to b.

Macros for iterator set comparison

These macros help with order-independent comparison of iterator set parameters, such as comparison of two arrays, or two vectors.

assure_set_eq(a, b): assure the set a is equal to the set b.
assure_set_ne(a, b): assure the set a is not equal to the set b.

Macros for IO-related checking

These macros help with IO-related checking, such as comparison of files, streams, etc. These macros return a Result with Ok(true) or Err(std::io::Error(…)).