The C++ test suite is built with LLVM source-based coverage instrumentation. The detailed HTML report is embedded below; it is generated next to this documentation by make doc. The published site rewrites the iframe to ../coverage/ so /api does not carry a second copy of the report.

Interpreting the summary

The text table printed by make coverage shows coverage per file across regions, functions, lines and branches. The HTML report keeps the same totals and adds per-line highlighting: covered lines are green, uncovered lines are red, and partially covered regions are yellow.