ROC
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Roc Preview.
At a glance
| Purpose | Roc source code: an app, module, package or platform of the purely functional language. |
| Extensions | .roc |
| Poka parser | poka-roc |
| Viewer | poka-metadata-card-viewer |
| Depth tier | Metadata card (see Depth tiers) |
| Breadth tier | B4 Summary (see Breadth tiers) |
How much Poka reads
B4 Summary. The container and metadata are read and summarised (counts, properties, structure), but the main content is not rendered.
Confidence: medium (the reviewer read the code). Basis: Reviewed 2026-10-26: read parsers/poka-roc/src/main.rs (348 lines) and plugin.json in full. The crate has no unit tests and no tests/samples.rs, and the corpus has no .roc sample, so the tier rests on reading the code. Covers .roc. The output is a metadata card of counts found by matching text line by line: the header kind, imports, provides, exposes, packages, top-level signatures and definitions, type aliases, tag unions and records, lambdas, when and if blocks, Task.* and Effect.* uses, crash, dbg and expect, doc comments, distinct names and line counts. Judgement: B4, because the structure is summarised but the source itself is never shown.
What Poka does not read
- The source text is not shown: the card carries only counts and a few sample names, with no code view or highlighting
- Constructs are found by matching text line by line, not by parsing, so multi-line declarations, nested or indented definitions and keywords inside strings or comments can be miscounted
- Counts of named items stop where their name list is capped (imports at 32), so a larger file under-reports them
- Files over 32 MiB are cut to the first 32 MiB (the card says so)
- Text that is not UTF-8 is decoded with replacement characters; no other encoding is tried
Libraries
Libraries Poka uses or has assessed for this format, with the status, licence and language the registry records.
- tree-sitter-roc (faldor20) (candidate; MIT; C/Rust bindings; https://github.com/faldor20/tree-sitter-roc) — Community tree-sitter grammar used by Zed; no description on repo; language inferred from file names
Sources
- parsers/poka-roc/src/main.rs
- parsers/poka-roc/plugin.json