onflow/cadence v0.10.0 on GitHub

💥 Breaking Changes

Contract Deployment

This release adds support for deploying multiple contracts per account.
The API for deploying has changed:

The functions AuthAccount.setCode and AuthAccount.unsafeNotInitializingSetCode were removed (#390).
A new contract management API has been added, which allows adding, updating, and removing multiple contracts per account (#333, #352).
See the updated documentation for details and examples.

⭐ Features

Enumerations

This release adds support for enumerations (#344).

For example, a days-of-the-week enum can be declared though:

enum Day: UInt8 {
    case Monday
    case Tuesday
    case Wednesday
    case Thursday
    case Friday
    case Saturday
    case Sunday
}

See the documentation for further details and examples.

Switch Statement

This release adds support for switch statements (#365).

fun describe(number: Int): String {
    switch number {
    case 1:
        return "one"
    case 2:
        return "two"
    default:
        return "other"
    }
}

See the documentation for further details and examples.

Code Formatter

Development of a code formatter has started, in form of a plugin for Prettier (#348).
If you would like to contribute, please let us know!

🛠 Improvements

Limitations on data structure complexity are now enforced when decoding and also when encoding storage data, e.g number of array elements, number of dictionary entries, etc. (#370)
Using the force-unwrap operator on a non-optional is no longer an error, but a hint is reported suggesting the removal of the unnecessary operation (#347)
Language Server: The features requiring a Flow client connection are now optional. This allows using the language server in editors other than Visual Studio Code, such as Emacs, Vim, etc. (#303)

🐞 Bug Fixes

Fixed the encoding of bignums in storage (#370)
Fixed the timing of recording composite-type explicit-conformances (#356)
Added support for exporting and JSON encoding/decoding of type values and capabilities (#374)
Added support for exporting/importing and JSON encoding/decoding of path values (#319)
Fixed the handling of empty integer literals in the checker (#354)
Fixed the non-storable fields error (#350)

📖 Documentation

Added a roadmap describing planned features and ideas (#367)
Various documentation improvements (#385). Thanks to @andrejtokarcik for contributing this!

📦 Dependencies

This release depends on a fork of the CBOR library that Cadence uses.
When importing Cadence in another Go codebase, add the following statement to the go.mod file:

replace github.com/fxamacker/cbor/v2 => github.com/turbolent/cbor/v2 v2.2.1-0.20200911003300-cac23af49154