v0.4.0

Changes

• no_std feature support #97

  • To disable std, change your Cargo.toml dependency to:
    bigdecimal = { version = "0.4", default-features = false }
  • Still depends on alloc (I think we will always need dynamic storage)

• Allow user to set default max-precision at compile time

  • Use environment variable RUST_BIGDECIMAL_DEFAULT_PRECISION
  • Defaults to 100
  • This "is the number of 3s in calculation of 1/3"
  • Better solutions are being considered
    • This is tricky: Do we set a global variable? Do we require every math operation to specify precision? Do we store precision in each BigDecimal? Is that set from a global variable? Should we use macros to balance explicit precision and tidy code?

• Add rounding module with RoundingMode enum

  • Used in new method: BigDecimal::with_scale_round
  • Finally, you can truncate your decimal with the rounding you prefer!
  • Will be coming to more methods, soon

• Reimplement parsing from {32,64}-bit float values

  • Use binary bits instead of formatting to string and parsing
  • Already surprising users: #103

• Bump Minimum Supported Rust Version from 1.34 to 1.43

  • Was breaking a few test dependencies
  • Able to do more at compile time
  • Probably wont affect too many people?

• Fix implementations of to_u128/to_i128 #101

  • Default implementations cast values to 64 bit ints

• Fix issue where underscores after the decimal counted towards total digit count (giving wrong exponent) #99

• Fix case of panic during rounding #90

• Add preliminary benchmarking code

  • Unsatisfied with statistics: more work to be done with Criterion
  • Eventually get some answers on how best to parse strings, and in what format should the digits be stored

• Started using my crazy approach to unit testing