pastey crate Safety qualification analysis report

Author: bharatGoswami8

external_crate_safety_qualification/pastey/result.rst

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+Pastey - Safety Qualification Results
+=====================================
+
+Crate Information
+-----------------
+
+**Crate Name:** pastey
+
+**Type:** Procedural Macro (proc-macro)
+
+**Purpose:** A small-sized procedural macro providing identifier pasting and case modification capabilities with environment variable support.
+
+**Description:** Pastey is a Rust procedural macro crate designed to provide convenient syntax for identifier construction. It supports various features including identifier pasting, case modifiers (uppercase, lowercase, snake_case, etc.), ``env!`` macro support, raw mode, and replace modifiers.
+
+**Repository:** https://github.com/as1100k/pastey
+
+**Documentation:** https://docs.rs/pastey/0.2.1/pastey/
+
+**Crate Version:** 0.2.1
+
+**Key Characteristics:**
+
+* Single public interface (one main macro function)
+* 917 lines of code (excluding tests and comments)
+* No unsafe code
+* Comprehensive test suite covering unit and integration tests
+* CI/CD with multi-version Rust testing (nightly, beta, stable, 1.54)
+* LLVM-based code coverage reporting
+
+**Qualification Date:** ....
+
+**Assessed By:** ....
+
+Safety Qualification Assessment
+--------------------------------
+
+Step 1: Determine (P): the uncertainty of the Processes applied
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. list-table::
+   :header-rows: 1
+   :widths: 5 50 10 35
+
+   * - Id
+     - Indicator for applying process
+     - Result
+     - Rationale for result
+
+   * - 1
+     - Are rules, state-of-the art processes applied for the design, implementation and verification?
+     - PE
+     - The project follows standard Rust open-source practices.
+       
+       CI verifications include:
+       
+       * test suite (4 Rust versions: nightly, beta, stable, 1.54)
+       * MSRV check
+       * Documentation generation
+       * Clippy linting strict warnings enforced (-Dwarnings)
+       * Miri UB detection
+       * dependency staleness checks
+       
+       This is a small-size proc-macro so relevant details are in the crate documentation, which includes usage, feature overview, brief detail of macro, APIs and use-cases examples.
+
+   * - 2
+     - Are requirements available?
+     - PE
+     - As this is small size procedural macro crate so functional requirements are partially captured in crate documentation as expected macro behaviors (identifier pasting, case modifiers, ``env!`` support, raw mode, replace modifier) with each feature explanation.
+       
+       CHANGELOG entries, and linked GitHub issues for all kind of new development.
+
+   * - 3
+     - Are design specifications available?
+     - PE
+     - It is small crate structure with one public interface so it does not required UML/Class diagram but all the relevant details are part of crate document.
+
+   * - 4
+     - Are specifications for functionalities and properties available (architecture)?
+     - PE
+     - It is small procedural macro so crate documentation contains the partially specifications for functionalities and their properties through feature descriptions, usage examples, and modifier tables.
+
+   * - 5
+     - Are configuration specification and data available, if applicable?
+     - HE
+     - Not applicable.
+       
+       The crate does not use any runtime configuration, environment-based settings, or configuration files. So no configuration specification is applicable or needed.
+
+   * - 6
+     - Are verification measures including tests and reports available?
+     - HE
+     - Comprehensive test suite exists, test files covering unit tests, integration tests (tests).
+       
+       An LLVM-based code coverage report is generated and available at index.html.
+
+Step 2: Determine (C): the uncertainty of finding systematic faults based on the Complexity
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. list-table::
+   :header-rows: 1
+   :widths: 5 40 30 10 10 20
+
+   * - Id
+     - Indicator for high Complexity
+     - Complexity measure Tool
+     - Result
+     - Number
+     - Comment
+
+   * - 1
+     - High amount of Lines of Code
+     - Lines of Code (without comments) (generated code is excluded, e.g. ProtoCmpl)
+     - NH
+     - 917
+     - Excluding tests
+
+   * - 2
+     - Unsafe code used / total unsafe code
+     - LoUC+N: lines of unsafe code with safety note. LoUC: lines of unsafe code, no safety note
+     - NH
+     - 0
+     - No unsafe code
+
+   * - 3
+     - Test exists / Coverage (Function, Line)
+     - Existing Tests Coverage
+     - NH
+     - Comprehensive test suite with LLVM-based code coverage report available
+     - With this PR https://github.com/AS1100K/pastey/pull/28, code coverage is -
+         * 100% function coverage
+         * 96.5% line coverage (C0) (missing lines are for error handling paths in the code, which are difficult to cover with tests)
+         * 93.2% branch coverage(C1) (missing branches are for error handling paths in the code, which are difficult to cover with tests)
+
+   * - 4
+     - High amount of public function interfaces
+     - Number of public function interfaces
+     - NH
+     - 1
+     - pastey macro has only 1 function
+
+   * - 5
+     - High amount of function parameters
+     - Number of parameters
+     - NH
+     - 1
+     - TokenStream is a only parameter for proc macro
+
+Step 3: Determine (CLAS_OUT): the classification outcome
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. list-table::
+   :header-rows: 1
+   :widths: 20 20 20 20
+
+   * - 
+     - C=1
+     - C=2
+     - C=3
+
+   * - P=1
+     - Q
+     - Q
+     - QR
+
+   * - P=2
+     - QR
+     - QR
+     - QR
+
+   * - P=3
+     - QR
+     - QR
+     - NQ
+
+**Result: Classification Outcome**
+
+Based on the assessment:
+
+* P (Processes) = 1
+* C (Complexity) = 2
+* **CLAS_OUT (Classification Outcome) = Q**
+
+**Classification Results:**
+
+* **Q:** Follow the processes for qualification of software components in a safety context.
+* **QR:** Follow the process for pre-existing software architectural elements.
+* **NQ:** Do not use this element in safety context.
+
+
+Assessment References document:  https://eclipse-score.github.io/score/main/modules/feo/feo/docs/component_classification.html