Keyword Index

This page serves as a reference for all keywords reserved in the Neo DevPack for Solidity compiler. Because Neo DevPack for Solidity uses the upstream solang-parser, it reserves the exact same keywords as mainline Ethereum Solidity.

Reserved Keywords

The following keywords are reserved and cannot be used as identifiers (e.g., variable or function names):

• after
• alias
• apply
• auto
• byte
• case
• catch
• copyof
• default
• define
• final
• implements
• in
• inline
• let
• macro
• match
• mutable
• null
• of
• partial
• promise
• reference
• relocatable
• sealed
• sizeof
• static
• supports
• switch
• try
• typedef
• typeof
• unchecked

💡 NeoVM Difference: Parsed Keywords

Keywords like unchecked and assembly are fully parsed by the frontend, but they do not have the same implementation status. unchecked is honored for Solidity 0.8 arithmetic overflow semantics, while assembly lowers a limited Yul subset and warns when unsupported EVM-only operations cannot be emitted.