เอกสารประกอบและการวิเคราะห์แบบสถิตด้วย Dialyzer

Maintainable Elixir is well documented and statically checked. Elixir bakes documentation and type hints right into the language, and tools verify them automatically.

Use @moduledoc for a module overview and @doc for each public function. These power generated docs and editor tooltips.

@spec declares the types a function accepts and returns. It documents intent and feeds static analysis.

Define reusable types with @type to keep specs readable.

Examples in a @doc can double as tests. Write an iex prompt and expected output, then ExUnit runs them via doctest.

Hook doctests into your test module so they run with the rest of the suite. Now your docs can never go stale.

ExDoc turns your moduledocs and specs into a polished HTML site. Add it as a dev dependency and run mix docs.

Dialyzer performs success typing — it finds code that can never succeed (type mismatches, unreachable clauses, bad spec usage) without you annotating everything.

The dialyxir wrapper makes Dialyzer easy. It builds a PLT (persistent lookup table) once, then checks fast.

Credo enforces style and surfaces refactoring opportunities — overly complex functions, inconsistent naming, code smells. Run it in CI to keep quality high.

A healthy Elixir pipeline runs:

• mix format --check-formatted
• mix credo --strict
• mix dialyzer
• mix test (including doctests)

Together they keep the codebase consistent and correct.

Test your documentation and analysis knowledge.

You learned documentation and static analysis:

• @moduledoc/@doc document modules and functions
• @spec and @type declare types
• Doctests keep examples verified
• ExDoc generates HTML docs
• Dialyzer finds type errors; Credo enforces style

These tools make Elixir codebases maintainable at scale.