Lib.rs

Provides a macro assert_within! for tests involving floating point numbers.

assert_within!(+0.001, val, target, "Value was not within additive 0.001: {more} {context}");
assert_within!(~0.05, val, target, "Value was not within 5% of target: {additional} {information:?}");

Highlights include:

• Pass arguments by reference or value
• Sigils (+, ~) indicate additive or relative error
• Traps Nan in any of the arguments
• Errors cause both the stringified expressions and their values to be displayed
• Arbitrary additional format args
• Generic over num_traits::FloatCore
• no_std compatible