Language Tutorials
These tutorials start from recognizable source code and show the same query in Rune Query Language and canonical JSON CodeQuery. Their fixtures, queries, and complete expected results are executed by Bifrost’s integration tests.
Each page builds from a broad structural query to narrower filters and exclusions. Import Traversal covers direct project-file edges, while Reference Traversal follows exact indexed declarations to source sites and semantic users. Every language cookbook also executes supertypes, subtypes, members, and owner, with bounded and transitive hierarchy examples distributed across the suite. The examples do not claim points-to, control-flow, or data-flow reasoning.
Hierarchy recipes return only declarations indexed by the fixture’s analyzer. Real projects may expose usages of library types whose declarations are not indexed; those library declarations remain outside the query result until library indexing can be targeted explicitly.
All language pages below are marked with the date of their last successful end-to-end verification.
Tutorials
Section titled “Tutorials”- Import Traversal Across Languages
- Reference Traversal Across Languages
- Python
- Java
- JavaScript
- TypeScript
- Go
- C and C++ through the
cppadapter - Rust
- PHP
- Scala
- C#
- Ruby
What “Every Kind” Means
Section titled “What “Every Kind” Means”query_code works with a public language-neutral vocabulary, not raw tree-sitter grammar node names. The completed tutorial suite exercises every normalized kind and role from that public vocabulary, including abstract subtype-aware queries such as callable, declaration, and literal. The aggregate integration test fails if a future vocabulary addition is not taught here.
Coverage map
Section titled “Coverage map”The pages deliberately spread the vocabulary across languages: calls and assignments appear in every adapter, decorators are demonstrated where the grammar exposes them, kwargs appears in Python, PHP, Scala, C#, and Ruby, and C/C++ share the cpp adapter. The executable coverage test is the authoritative map because it checks the canonical JSON cases and their exact results.