PatLang Branch Coverage

Paste a self-contained PatLang program (no include lines -- this instruments the text directly) and click Run. The summary table and per-function tabs below show which branches your program's own code actually took while it ran, and which it never did -- the same static-catalog-plus-dynamic-instrumentation technique as the CLI tool (pat --ir-run self_hosting/tools/coverage_main.patlang <test file>), which can report on a whole real test suite including files the browser can't read. See the Paradigms Guide and self_hosting/lib/coverage.patlang for how instrumentation works and why it's built this way (there's no execution-tracing hook anywhere in PatLang's runtime, so this regenerates the source with a small tracking call wrapped around every branch condition, rather than changing the interpreter).

make a function called classify takes n returns r if n > 100 then return "big" else if n > 10 then return "medium" else return "small" end end end print(classify(5)) print(classify(50))

Run Coverage