Solidity 0.8.35

Overview

The Solidity team has released version 0.8.35 of the Solidity Compiler, introducing a new builtin for ERC-7201 storage namespace computation and several compiler infrastructure improvements. This release also expands the experimental mode framework and adds future-keyword warnings.

New Language Features

• ERC-7201 Builtin — A new builtin function computes the base slot of a storage namespace using the erc7201 formula defined in ERC-7201, simplifying storage layout management in upgradeable contracts.
• Future Keyword Warnings — The Name Resolver now warns about identifiers selected for future promotion to Solidity or Yul keywords, including at, error, layout, leave, super, transient, and this.
• Yul Reserved Identifiers — The Yul Analyzer warns about identifiers reserved for future use such as basefee, blobbasefee, blobhash, clz, leave, memoryguard, mcopy, prevrandao, tload, and tstore.

Compiler Features

• Experimental Flag — A new --experimental flag is now required to enable experimental mode, replacing the previous implicit opt-in mechanism.
• SSA CFG Codegen — The SSA-based control-flow-graph code generation pipeline is introduced as an experimental feature, paving the way for improved optimization passes.
• Granular ETHDebug Outputs — The deprecated --ethdebug and --ethdebug-runtime options are replaced with more granular --ethdebug-resources, --ethdebug-compilation, --ethdebug-program, and --ethdebug-program-runtime.
• Experimental EVM Version — An experimental EVM version @future is introduced for testing upcoming EVM features.
• Deprecated Assembly Input Removed — The CLI no longer allows selecting the deprecated assembly input mode via --assemble.

Performance and Internals

• Sanity Check Optimization — Performance of sanity checks throughout the compiler implementation has been improved.
• Experimental Mode Metadata — The state of experimental mode is now stored in both JSON and CBOR metadata, broadening the existing experimental field semantics.
• Restricted Experimental Features — All existing experimental features (generic-solidity, lsp, ethdebug, eof, evm, ast-import, evmasm-import, ir-ast, ssa-cfg) are now restricted to experimental mode only.

Solidity 0.8.35 is available now via the official installer, solc-bin, or Docker. Full release notes are available on the Solidity blog and the GitHub releases page.