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Document markdown tokenization#153

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leynos wants to merge 2 commits intomainfrom
codex/add-documentation-to-tokenize_markdown-function
Closed

Document markdown tokenization#153
leynos wants to merge 2 commits intomainfrom
codex/add-documentation-to-tokenize_markdown-function

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@leynos leynos commented Jul 31, 2025

Summary

  • document tokenization logic in tokenize_markdown

Testing

  • make fmt
  • make lint
  • make test
  • make markdownlint
  • make nixie (fails: too many arguments)

https://chatgpt.com/codex/tasks/task_e_688a8aaf45548322b0d8d06d738127aa

Summary by Sourcery

Improve and expand the documentation for markdown tokenization in the wrap module

Documentation:

  • Clarify that consecutive whitespace emits a single text token
  • Describe how backtick runs denote code spans and support nested backticks by matching delimiter lengths
  • Explain the state machine used to preserve fenced block content unchanged

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sourcery-ai Bot commented Jul 31, 2025

Reviewer's Guide

Refines and expands documentation for the markdown tokenizer, clarifying whitespace merging, backtick-based code span handling (including nested and unmatched cases), and the state machine behavior for fenced blocks.

Flow diagram for markdown tokenization logic

flowchart TD
    A[Start] --> B{Whitespace?}
    B -- Yes --> C[Emit Token::Text for whitespace]
    B -- No --> D{Backtick sequence?}
    D -- Yes --> E[Search for matching backtick delimiter]
    E -- Found --> F[Emit code span token]
    E -- Not found --> G[Treat backticks as literal text]
    D -- No --> H[Emit Token::Text for normal text]
    F --> I[Continue]
    G --> I
    H --> I
    C --> I
    I --> J{Fenced block?}
    J -- Yes --> K[Pass lines through unchanged]
    J -- No --> B
    K --> B
    J -- End of input --> L[End]
Loading

File-Level Changes

Change Details Files
Enhanced documentation comment for the markdown tokenizer.
  • Reworded function description to focus on whitespace and backtick delimiters
  • Clarified how consecutive whitespace is merged into a single token
  • Expanded explanation of backtick runs, nested code spans, and unmatched delimiters
  • Added note on state machine for fenced block handling
src/wrap.rs

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coderabbitai Bot commented Jul 31, 2025

Summary by CodeRabbit

  • Documentation
    • Improved the documentation for the markdown tokenisation function, providing a clearer and more detailed explanation of its behaviour and output. No changes to functionality.

Walkthrough

Update the documentation comment for the tokenize_markdown function in src/wrap.rs to provide a more precise and detailed explanation of its behaviour, including its handling of whitespace, backtick delimiters, code spans, and fenced blocks. No functional or control flow changes are introduced.

Changes

Cohort / File(s) Change Summary
Documentation Update
src/wrap.rs
Revise the doc comment for tokenize_markdown to clarify its tokenisation logic, code span handling, and fenced block processing. No code or interface changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

Poem

Whitespace and backticks, a docstring anew,
Explaining the logic of what tokens do.
Fences are guarded, spans nested with care,
The function unchanged, but clarity there.
Let precision in docs ever shine through!

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  • Commit unit tests in branch codex/add-documentation-to-tokenize_markdown-function

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Hey @leynos - I've reviewed your changes and they look great!


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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI
Review profile: ASSERTIVE
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between a007e15 and aecaa69.

📒 Files selected for processing (1)
  • src/wrap.rs (1 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
**/*.rs

📄 CodeRabbit Inference Engine (AGENTS.md)

**/*.rs: Clippy warnings MUST be disallowed.
Fix any warnings emitted during tests in the code itself rather than silencing them.
Where a function is too long, extract meaningfully named helper functions adhering to separation of concerns and CQRS.
Where a function has too many parameters, group related parameters in meaningfully named structs.
Where a function is returning a large error consider using Arc to reduce the amount of data returned.
Write unit and behavioural tests for new functionality. Run both before and after making any change.
Every module must begin with a module level (//!) comment explaining the module's purpose and utility.
Document public APIs using Rustdoc comments (///) so documentation can be generated with cargo doc.
Prefer immutable data and avoid unnecessary mut bindings.
Handle errors with the Result type instead of panicking where feasible.
Avoid unsafe code unless absolutely necessary and document any usage clearly.
Place function attributes after doc comments.
Do not use return in single-line functions.
Use predicate functions for conditional criteria with more than two branches.
Lints must not be silenced except as a last resort.
Lint rule suppressions must be tightly scoped and include a clear reason.
Prefer expect over allow.
Prefer .expect() over .unwrap().
Use concat!() to combine long string literals rather than escaping newlines with a backslash.
Prefer semantic error enums: Derive std::error::Error (via the thiserror crate) for any condition the caller might inspect, retry, or map to an HTTP status.
Use an opaque error only at the app boundary: Use eyre::Report for human-readable logs; these should not be exposed in public APIs.
Never export the opaque type from a library: Convert to domain enums at API boundaries, and to eyre only in the main main() entrypoint or top-level async task.

Files:

  • src/wrap.rs

⚙️ CodeRabbit Configuration File

**/*.rs: * Seek to keep the cyclomatic complexity of functions no more than 12.

  • Adhere to single responsibility and CQRS

  • Place function attributes after doc comments.

  • Do not use return in single-line functions.

  • Move conditionals with >2 branches into a predicate function.

  • Avoid unsafe unless absolutely necessary.

  • Every module must begin with a //! doc comment that explains the module's purpose and utility.

  • Comments and docs must follow en-GB-oxendict (-ize / -our) spelling and grammar

  • Lints must not be silenced except as a last resort.

    • #[allow] is forbidden.
    • Only narrowly scoped #[expect(lint, reason = "...")] is allowed.
    • No lint groups, no blanket or file-wide suppression.
    • Include FIXME: with link if a fix is expected.
  • Use rstest fixtures for shared setup and to avoid repetition between tests.

  • Replace duplicated tests with #[rstest(...)] parameterised cases.

  • Prefer mockall for mocks/stubs.

  • Prefer .expect() over .unwrap()

  • Ensure that any API or behavioural changes are reflected in the documentation in docs/

  • Ensure that any completed roadmap steps are recorded in the appropriate roadmap in docs/

  • Files must not exceed 400 lines in length

    • Large modules must be decomposed
    • Long match statements or dispatch tables should be decomposed by domain and collocated with targets
    • Large blocks of inline data (e.g., test fixtures, constants or templates) must be moved to external files and inlined at compile-time or loaded at run-time.

Files:

  • src/wrap.rs

Comment thread src/wrap.rs Outdated
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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI
Review profile: ASSERTIVE
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between aecaa69 and d66ae8d.

📒 Files selected for processing (1)
  • src/wrap.rs (1 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
**/*.rs

📄 CodeRabbit Inference Engine (AGENTS.md)

**/*.rs: Clippy warnings MUST be disallowed.
Fix any warnings emitted during tests in the code itself rather than silencing them.
Where a function is too long, extract meaningfully named helper functions adhering to separation of concerns and CQRS.
Where a function has too many parameters, group related parameters in meaningfully named structs.
Where a function is returning a large error consider using Arc to reduce the amount of data returned.
Write unit and behavioural tests for new functionality. Run both before and after making any change.
Every module must begin with a module level (//!) comment explaining the module's purpose and utility.
Document public APIs using Rustdoc comments (///) so documentation can be generated with cargo doc.
Prefer immutable data and avoid unnecessary mut bindings.
Handle errors with the Result type instead of panicking where feasible.
Avoid unsafe code unless absolutely necessary and document any usage clearly.
Place function attributes after doc comments.
Do not use return in single-line functions.
Use predicate functions for conditional criteria with more than two branches.
Lints must not be silenced except as a last resort.
Lint rule suppressions must be tightly scoped and include a clear reason.
Prefer expect over allow.
Prefer .expect() over .unwrap().
Use concat!() to combine long string literals rather than escaping newlines with a backslash.
Prefer semantic error enums: Derive std::error::Error (via the thiserror crate) for any condition the caller might inspect, retry, or map to an HTTP status.
Use an opaque error only at the app boundary: Use eyre::Report for human-readable logs; these should not be exposed in public APIs.
Never export the opaque type from a library: Convert to domain enums at API boundaries, and to eyre only in the main main() entrypoint or top-level async task.

Files:

  • src/wrap.rs

⚙️ CodeRabbit Configuration File

**/*.rs: * Seek to keep the cyclomatic complexity of functions no more than 12.

  • Adhere to single responsibility and CQRS

  • Place function attributes after doc comments.

  • Do not use return in single-line functions.

  • Move conditionals with >2 branches into a predicate function.

  • Avoid unsafe unless absolutely necessary.

  • Every module must begin with a //! doc comment that explains the module's purpose and utility.

  • Comments and docs must follow en-GB-oxendict (-ize / -our) spelling and grammar

  • Lints must not be silenced except as a last resort.

    • #[allow] is forbidden.
    • Only narrowly scoped #[expect(lint, reason = "...")] is allowed.
    • No lint groups, no blanket or file-wide suppression.
    • Include FIXME: with link if a fix is expected.
  • Use rstest fixtures for shared setup and to avoid repetition between tests.

  • Replace duplicated tests with #[rstest(...)] parameterised cases.

  • Prefer mockall for mocks/stubs.

  • Prefer .expect() over .unwrap()

  • Ensure that any API or behavioural changes are reflected in the documentation in docs/

  • Ensure that any completed roadmap steps are recorded in the appropriate roadmap in docs/

  • Files must not exceed 400 lines in length

    • Large modules must be decomposed
    • Long match statements or dispatch tables should be decomposed by domain and collocated with targets
    • Large blocks of inline data (e.g., test fixtures, constants or templates) must be moved to external files and inlined at compile-time or loaded at run-time.

Files:

  • src/wrap.rs
🔇 Additional comments (1)
src/wrap.rs (1)

189-198: Documentation improvement addresses whitespace delimiter concern.

The updated documentation correctly clarifies that whitespace is preserved exactly as it appears and no longer incorrectly describes whitespace as a delimiter. This addresses the concern raised in the previous review about the function's actual behaviour.

Comment thread src/wrap.rs
@leynos
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leynos commented Jul 31, 2025

Stale

@leynos leynos closed this Jul 31, 2025
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