{"id":68158,"library":"ast-grep-core","title":"Ast-grep Core","description":"Search and rewrite code at large scale using precise AST pattern matching.","status":"active","version":"0.43.0","language":"rust","source_language":null,"source_url":"https://github.com/ast-grep/ast-grep","tags":["ast","pattern-matching","code-search","refactoring"],"install":[{"cmd":"# Cargo.toml\n[dependencies]\nast-grep-core = \"0.43.0\"","lang":"toml","label":"Cargo.toml"},{"cmd":"cargo add ast-grep-core","lang":"bash","label":"cargo add"}],"dependencies":[],"imports":[{"symbol":"AstGrep","correct":"use ast_grep_core::AstGrep;"}],"quickstart":{"code":"use ast_grep_core::AstGrep;\n\nfn main() {\n    let source = \"let x = 1;\";\n    let grep = AstGrep::new(source, \"javascript\");\n    let results = grep.all(\"let $A = $B\");\n    for r in results {\n        println!(\"Found: {}\", r.text());\n    }\n}","lang":"rust","description":"Search JavaScript code for pattern matches."},"warnings":[{"fix":"Enable the corresponding feature in Cargo.toml: ast-grep-core = { features = [\"javascript\"] }","message":"Requires language-specific parser feature flags (e.g., 'javascript', 'python').","severity":"gotcha","affected_versions":">=0.43.0"}],"env_vars":null,"search_vec":"'ast':2,14,17 'ast-grep':1 'code':8,22 'code-search':21 'core':4 'grep':3 'larg':10 'match':16,20 'pattern':15,19 'pattern-match':18 'precis':13 'refactor':24 'rewrit':7 'scale':11 'search':5,23 'use':12","created_at":"2026-06-17T17:46:19.889064+00:00","updated_at":"2026-06-17T17:46:19.889064+00:00","problems":[],"ecosystem":"crates","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":null,"cli_version":null,"type":"library","homepage":"https://ast-grep.github.io/","github":"https://github.com/ast-grep/ast-grep","docs":"https://docs.rs/ast-grep-core/","changelog":null,"pypi":null,"npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["utility","other"],"base_url":null,"auth_type":null,"provenance":{"verified_status":null,"verified_at":null,"last_verified":"2026-06-17","next_check":"2026-12-14","install_tag":null}}