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# System prepended metadata

title: 'Open Discussion: New features for Yul'

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# Open Discussion: New features for Yul

*These are collaborative notes from the open discussion round about "New features for Yul" at the [Solidity Summit 2020](https://solidity-summit.ethereum.org/).*

Single-case switch: https://github.com/ethereum/solidity/issues/4285
- Suggestion: always require a default case for switches


Curly braces around cases: https://github.com/ethereum/solidity/issues/8142
- Con: It'd be a different kind of block.

User-defined types: https://github.com/ethereum/solidity/issues/3525
