gram_grep
contract
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gram_grep
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AST-grep(sg) is a CLI tool for code structural search, lint, and rewriting
There is also gram_grep[0]"Search text using a grammar, lexer, or straight regex. Chain searches for greater refinement."
See also parsertl-playground[1] for online edit/test grammars.
[0]https://github.com/BenHanson/gram_grep
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Show HN: Yacc/Lex editor/tester online
I'm building an online yacc/lex (LALR(1)) grammar editor/tester to help develop/debug/document grammars, the main repository is here https://github.com/mingodad/parsertl-playground and the online playground with several non trivial examples is here https://mingodad.github.io/parsertl-playground/playground/ .
Select a grammar/example from "Examples" select box and then click "Parse" to see a parser tree for the source in "Input source" editor.
It's based on https://github.com/BenHanson/gram_grep and https://github.com/BenHanson/lexertl14 .
Any feedback is welcome !
The grammars available so far (with varying state of correctness):
- Ada parser
- Question about lexer and parser generators in Rust
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MSVC Backend Updates in Visual Studio 2019 version 16.10 Preview 2 | C++ Team Blog
Thanks for the tip, but I fear storing the result on the stack will be too much to ask for for big lexers (see https://github.com/BenHanson/gram_grep/blob/c64f8829661f11b38a55b42b37f5051c5eabfaa6/main.cpp#L2301 for example).
contract
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AST-grep(sg) is a CLI tool for code structural search, lint, and rewriting
Interesting use-case: We use ast-grep extensively at CodeRabbit[0] to review pull requests with AI.
We use gpt-4 to generate ast-grep patterns to deep-dive and verify pull-request integrity. We just rolled this feature out 3 days back and we are getting amazing results!
For example, comments such as these are powered by AI-generate ast-grep queries: https://github.com/amorphie/contract/pull/100#discussion_r14...
[0]: https://coderabbit.ai
What are some alternatives?
frozen - a header-only, constexpr alternative to gperf for C++14 users
diffsitter - A tree-sitter based AST difftool to get meaningful semantic diffs
tracy - Frame profiler
gramatika - A minimal toolkit for writing parsers with Rust
parsertl14 - C++14 version of parsertl
chumsky - Write expressive, high-performance parsers with ease.
semgrep - Lightweight static analysis for many languages. Find bug variants with patterns that look like source code.
STL - MSVC's implementation of the C++ Standard Library.
ssr.nvim - Treesitter based structural search and replace plugin for Neovim.
nom - Rust parser combinator framework
rewrite - Automated mass refactoring of source code.