I scoured the Mix and Solidity repos for something like a formal definition of the language's grammar, so that one may generate parsers using tools like GrammarKit, but couldn't find anything.
Any pointers?
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1If there's no answer here, I suggest trying gitter.im/ethereum/solidity– eth ♦Commented Jun 15, 2016 at 9:57
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5 Answers
There's a file called grammar.txt in the Solidity repo:
https://github.com/ethereum/solidity/blob/develop/docs/grammar.txt
That's probably what you're looking for?
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Thanks! I searched for "grammar" in the same repo, and the only thing GitHub was able to find was "Scanner.cpp"... Too bad they're not using BNF, I might raise an issue for that. Should be easy to convert though.– mxkCommented Jun 15, 2016 at 15:02
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2NOTE: This has now moved to github.com/ethereum/solidity/blob/develop/docs/grammar.txt Commented Jan 5, 2017 at 15:07
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the 2nd link is also broken, but here’s a “mirror”: ethereumacademy.blogspot.com/2017/10/… Commented Mar 1, 2021 at 14:41
I wrote an ANTLR4 grammar for Solidity that you may find useful:
https://github.com/solidityj/solidity-antlr4
It can generate parsers in any of the ANTLR supported targets and it has full support for the Solidity language as of today.
Here's yet another link pointing to the solidity documentation:
http://solidity.readthedocs.io/en/develop/miscellaneous.html#language-grammar
There is also a xText grammar, https://github.com/webdaford/smart-contract-tools/blob/master/workspace/com.dell.research.bc.eth.solidity.editor/src/com/dell/research/bc/eth/solidity/editor/Solidity.xtext which is quite similar to BNF.
There is also a grammar based on javascript grammar.
