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!.

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 sets, such as arrays and 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 truth checking, which returns Err(std::io::Error(…)):

• assure_io!(a): assure a is true.