well-typed/hs-bindgen
Nov 2024 – Mar 2026
15 Months active
Languages Used
CC++HaskellMakefileRustShellMarkdownText
Technical Skills
C ProgrammingError HandlingExample ImplementationException ManagementHeader File GenerationLibrary Refactoring
Edsko de Vries
PROFILE
Edsko De Vries
Over a 15-month period, contributed to the well-typed/hs-bindgen repository by architecting and evolving a robust C-to-Haskell binding generator. The work spanned core API design, AST manipulation, and cross-language code generation, with a focus on maintainability, type safety, and extensibility. Leveraging Haskell, C, and C++, delivered features such as improved macro handling, enhanced type system modeling, and streamlined build tooling. Refactored internal data models and parsing infrastructure to reduce technical debt and accelerate onboarding. Emphasized documentation, testing, and compatibility, enabling safer FFI adoption and more reliable bindings for downstream users while supporting ongoing project scalability.
Overall Statistics
Feature vs Bugs
82%Features
Repository Contributions
323Total
Bugs
19
Commits
323
Features
86
Lines of code
356,428
Activity Months15
Your Network
21 peopleWork History
March 2026
2 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for well-typed/hs-bindgen: Delivered release 0.1.0-alpha2 with breaking changes for hs-bindgen-runtime and transitioned the runtime module to a public pre-release status. Updated release notes and CHANGELOG to reflect the new pre-release and migration path. This work establishes the foundation for broader adoption and future iterations while maintaining clear communication with downstream consumers, enabling downstream teams to plan migrations and integrations with the updated API surface.
2 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for well-typed/hs-bindgen: Delivered release 0.1.0-alpha2 with breaking changes for hs-bindgen-runtime and transitioned the runtime module to a public pre-release status. Updated release notes and CHANGELOG to reflect the new pre-release and migration path. This work establishes the foundation for broader adoption and future iterations while maintaining clear communication with downstream consumers, enabling downstream teams to plan migrations and integrations with the updated API surface.
March 2026
February 2026
19 Commits • 3 Features
Feb 1, 2026February 2026 monthly summary for well-typed/hs-bindgen focused on delivering robust documentation, improved tooling, and increased build stability to enable safer adoption and faster time-to-value for downstream users.
February 2026
19 Commits • 3 Features
Feb 1, 2026February 2026 monthly summary for well-typed/hs-bindgen focused on delivering robust documentation, improved tooling, and increased build stability to enable safer adoption and faster time-to-value for downstream users.
January 2026
4 Commits • 3 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for well-typed/hs-bindgen. Focused on reliability, maintainability, and developer velocity in the Haskell codebase. Key work includes documentation and memory management enhancements (SizedByteArray docs, thawToPinned memory handling, and ensuring docs attach to declarations in the current module), robustness improvements to anonymous declarations location tracking (support for multiple source locations to improve code generation accuracy), and codebase naming convention cleanup to standardize unwrap usage across data types and fields. These changes reduce ambiguity, enhance memory safety, and streamline future development and codegen. Commits touched: 28c5454834871436315d9f687b779b88d6468925; ec041f565d5668ae0314602b2aa95b3cf200a232; 1aca3186d9465c83a802dd499f8c392e6fdcd187; adc355aa5a84e6d9b4221b1fcd1f8a323da956e7. (Closes #1442, Closes #1631).
4 Commits • 3 Features
Jan 1, 2026January 2026 (2026-01) monthly summary for well-typed/hs-bindgen. Focused on reliability, maintainability, and developer velocity in the Haskell codebase. Key work includes documentation and memory management enhancements (SizedByteArray docs, thawToPinned memory handling, and ensuring docs attach to declarations in the current module), robustness improvements to anonymous declarations location tracking (support for multiple source locations to improve code generation accuracy), and codebase naming convention cleanup to standardize unwrap usage across data types and fields. These changes reduce ambiguity, enhance memory safety, and streamline future development and codegen. Commits touched: 28c5454834871436315d9f687b779b88d6468925; ec041f565d5668ae0314602b2aa95b3cf200a232; 1aca3186d9465c83a802dd499f8c392e6fdcd187; adc355aa5a84e6d9b4221b1fcd1f8a323da956e7. (Closes #1442, Closes #1631).
January 2026
December 2025
98 Commits • 21 Features
Dec 1, 2025December 2025 performance snapshot for well-typed/hs-bindgen. Delivered a sequence of architectural cleanups and feature refinements that reduce complexity, improve maintainability, and accelerate future iterations. The work emphasizes correctness, cross-module consistency, and alignment with Ghc compatibility requirements, delivering tangible business value in reduced maintenance burden and faster delivery cycles. Key outcomes include: - Obsolete QualPrelimDeclId and QualDeclId removed from the codebase to simplify the identifier model and remove legacy debt; commits 23a0cb2c3e7201adbac1febc3e59688da23270d6 and f2ab7253bdca106e1df720bfd77a75571d80532b. - Dropped cycle detection and clarified that builtins are not a separate name kind, streamlining name handling and enabling a cleaner Great Identifier Simplification; commits 9b4d469f80c0159b5b6f875985f60b9c0667fe57 and da366d6f1a13721fc8ef5c0c5335ed3872703f45b. - Macro parsing improvements: ensure the parser can parse the literal 0 (avoiding octal misinterpretation) and introduce coercePassMacroBody for a cleaner macro body handling; commits 5c09aa4ed8230a17150c183b335a038d68119659 and 9ee08343a7c9df407bdeb9376b43c1e7a0a3cd16. - Major compiler/type-system refactors: added AssignAnonIds pass, enabled UnboxedTuples when Prim is used, and removed the HaskellId type family in favor of Id, enhancing consistency and simplifying dependencies; commits d57d2e2552b389e70b16221daec55803dbf16c9b, 64165a4025253bbe7b8b214f98182d79fa4c4bd2, and 9d1931b9f24c858d0c352aab34303020cc919b8b. - Architecture/dep cleanup and data-model enrichment: external AST removal and Config type family drop to reduce cross-dependencies, complemented by extensive record-field refactors across modules (HeaderInfo, Parse.Result, Decl.DeclInfo, AST.Decl, Trace.Predicate, Tasty.Golden, Golden/TestCase, ClangArgsConfig, Config and Config.Internal) to improve traceability, testing, and future extensibility; commits 5aaf0aab8e19a5ecc493b08661ee78c60d9a528b and b8d5ee6d01d9120c5b61c0c98a57586601be645c, plus numerous related record-field updates. Overall impact: Reduced technical debt and cross-module coupling, improved type-system cleanliness, and a clearer path for Ghc 9.2+ compatibility. Business value includes faster iteration cycles, easier onboarding for contributors, and more reliable bindings generation for the Haskell FFI surface. Technologies/skills demonstrated: advanced Haskell design (type families, passes, and AST structuring), large-scale refactoring with minimal disruption, cross-module data modeling, and emphasis on maintainability and future-proofing for compiler/tooling workloads.
December 2025
98 Commits • 21 Features
Dec 1, 2025December 2025 performance snapshot for well-typed/hs-bindgen. Delivered a sequence of architectural cleanups and feature refinements that reduce complexity, improve maintainability, and accelerate future iterations. The work emphasizes correctness, cross-module consistency, and alignment with Ghc compatibility requirements, delivering tangible business value in reduced maintenance burden and faster delivery cycles. Key outcomes include: - Obsolete QualPrelimDeclId and QualDeclId removed from the codebase to simplify the identifier model and remove legacy debt; commits 23a0cb2c3e7201adbac1febc3e59688da23270d6 and f2ab7253bdca106e1df720bfd77a75571d80532b. - Dropped cycle detection and clarified that builtins are not a separate name kind, streamlining name handling and enabling a cleaner Great Identifier Simplification; commits 9b4d469f80c0159b5b6f875985f60b9c0667fe57 and da366d6f1a13721fc8ef5c0c5335ed3872703f45b. - Macro parsing improvements: ensure the parser can parse the literal 0 (avoiding octal misinterpretation) and introduce coercePassMacroBody for a cleaner macro body handling; commits 5c09aa4ed8230a17150c183b335a038d68119659 and 9ee08343a7c9df407bdeb9376b43c1e7a0a3cd16. - Major compiler/type-system refactors: added AssignAnonIds pass, enabled UnboxedTuples when Prim is used, and removed the HaskellId type family in favor of Id, enhancing consistency and simplifying dependencies; commits d57d2e2552b389e70b16221daec55803dbf16c9b, 64165a4025253bbe7b8b214f98182d79fa4c4bd2, and 9d1931b9f24c858d0c352aab34303020cc919b8b. - Architecture/dep cleanup and data-model enrichment: external AST removal and Config type family drop to reduce cross-dependencies, complemented by extensive record-field refactors across modules (HeaderInfo, Parse.Result, Decl.DeclInfo, AST.Decl, Trace.Predicate, Tasty.Golden, Golden/TestCase, ClangArgsConfig, Config and Config.Internal) to improve traceability, testing, and future extensibility; commits 5aaf0aab8e19a5ecc493b08661ee78c60d9a528b and b8d5ee6d01d9120c5b61c0c98a57586601be645c, plus numerous related record-field updates. Overall impact: Reduced technical debt and cross-module coupling, improved type-system cleanliness, and a clearer path for Ghc 9.2+ compatibility. Business value includes faster iteration cycles, easier onboarding for contributors, and more reliable bindings generation for the Haskell FFI surface. Technologies/skills demonstrated: advanced Haskell design (type families, passes, and AST structuring), large-scale refactoring with minimal disruption, cross-module data modeling, and emphasis on maintainability and future-proofing for compiler/tooling workloads.
November 2025
32 Commits • 15 Features
Nov 1, 2025In 2025-11, well-typed/hs-bindgen delivered a major ID/type system overhaul, translation infrastructure refinements, and solid build/quality improvements that collectively increase stability and accelerate future work. The highlights include a refactored name/ID model (DeclId, QualDeclId, TaggedTypeId) with new NamedDeclId and BuiltDeclId, improved name mangler integration, and added haskellId support for new bindings; groundwork for qualifiers and cross-module references is in place. Translation/config was disentangled, module naming standardized (Hs.ModuleName, BaseModuleName), and export discipline enforced to improve API clarity. Build hygiene was improved with a libclang bump and fixture alignment; several bug fixes reduced risk in deployment (void macro-type parsing, C wrapper source handling, and foreignImportOrigName naming). These changes reduce risk in symbol resolution, improve maintainability, and enable faster future refactors.
32 Commits • 15 Features
Nov 1, 2025In 2025-11, well-typed/hs-bindgen delivered a major ID/type system overhaul, translation infrastructure refinements, and solid build/quality improvements that collectively increase stability and accelerate future work. The highlights include a refactored name/ID model (DeclId, QualDeclId, TaggedTypeId) with new NamedDeclId and BuiltDeclId, improved name mangler integration, and added haskellId support for new bindings; groundwork for qualifiers and cross-module references is in place. Translation/config was disentangled, module naming standardized (Hs.ModuleName, BaseModuleName), and export discipline enforced to improve API clarity. Build hygiene was improved with a libclang bump and fixture alignment; several bug fixes reduced risk in deployment (void macro-type parsing, C wrapper source handling, and foreignImportOrigName naming). These changes reduce risk in symbol resolution, improve maintainability, and enable faster future refactors.
November 2025
October 2025
4 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for well-typed/hs-bindgen focused on macro system cleanup and translation refactor. Delivered two major features that simplify macro processing, reduce dead code, and streamline translation pipelines. No customer-reported bugs in this period; emphasis on maintainability, long-term stability, and readiness for future enhancements.
October 2025
4 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for well-typed/hs-bindgen focused on macro system cleanup and translation refactor. Delivered two major features that simplify macro processing, reduce dead code, and streamline translation pipelines. No customer-reported bugs in this period; emphasis on maintainability, long-term stability, and readiness for future enhancements.
September 2025
16 Commits • 4 Features
Sep 1, 2025September 2025 monthly summary for well-typed/hs-bindgen. Focused on delivering core parsing and API improvements, refactoring for maintainability, and streamlining the build/CI process to accelerate future work and reduce risk in cross-language bindings.
16 Commits • 4 Features
Sep 1, 2025September 2025 monthly summary for well-typed/hs-bindgen. Focused on delivering core parsing and API improvements, refactoring for maintainability, and streamlining the build/CI process to accelerate future work and reduce risk in cross-language bindings.
September 2025
July 2025
20 Commits • 3 Features
Jul 1, 2025July 2025 monthly summary for well-typed/hs-bindgen: Focused on expanding binding coverage, improving robustness, and strengthening testing and diagnostics to accelerate reliable C/C++ bindings generation.
July 2025
20 Commits • 3 Features
Jul 1, 2025July 2025 monthly summary for well-typed/hs-bindgen: Focused on expanding binding coverage, improving robustness, and strengthening testing and diagnostics to accelerate reliable C/C++ bindings generation.
June 2025
44 Commits • 9 Features
Jun 1, 2025June 2025 - well-typed/hs-bindgen: Delivered a frontend replacement and core API refactor, expanded Clang bindings, and overhauled parsing/AST internals for better reliability and maintainability. Implemented an AST folding/resolution overhaul, introduced HsBindgen.Clang, and enhanced the parser with separate monads for types/decls, plus improved error handling and variadic function support. Strengthened build tooling and project structure, added ConstantArray utilities, and performed essential cleanup (Licensing, unused files, submodules).
44 Commits • 9 Features
Jun 1, 2025June 2025 - well-typed/hs-bindgen: Delivered a frontend replacement and core API refactor, expanded Clang bindings, and overhauled parsing/AST internals for better reliability and maintainability. Implemented an AST folding/resolution overhaul, introduced HsBindgen.Clang, and enhanced the parser with separate monads for types/decls, plus improved error handling and variadic function support. Strengthened build tooling and project structure, added ConstantArray utilities, and performed essential cleanup (Licensing, unused files, submodules).
June 2025
May 2025
5 Commits • 3 Features
May 1, 2025In May 2025, delivered three major enhancements to the C-to-Haskell binding generator and Clang integration, focusing on reliability, accuracy, and extensibility. These changes reduce binding churn, broaden coverage for real-world C code (including attributed types), and provide a robust foundation for future features.
May 2025
5 Commits • 3 Features
May 1, 2025In May 2025, delivered three major enhancements to the C-to-Haskell binding generator and Clang integration, focusing on reliability, accuracy, and extensibility. These changes reduce binding churn, broaden coverage for real-world C code (including attributed types), and provide a robust foundation for future features.
April 2025
18 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for well-typed/hs-bindgen: delivered substantial feature enhancements for complex C type and enum support, improved name/type handling in the bindings generator, expanded external bindings documentation and configuration, and significant internal refactors to improve readability and maintainability. These changes improved cross-language fixture generation (C, Haskell, Rust), stabilized codegen, and reduced issues related to typedefs, quirky C identifiers, and unsigned char mappings, delivering measurable business value through safer bindings, faster iteration, and clearer user guidance.
18 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for well-typed/hs-bindgen: delivered substantial feature enhancements for complex C type and enum support, improved name/type handling in the bindings generator, expanded external bindings documentation and configuration, and significant internal refactors to improve readability and maintainability. These changes improved cross-language fixture generation (C, Haskell, Rust), stabilized codegen, and reduced issues related to typedefs, quirky C identifiers, and unsigned char mappings, delivering measurable business value through safer bindings, faster iteration, and clearer user guidance.
April 2025
March 2025
33 Commits • 9 Features
Mar 1, 2025March 2025 focused on strengthening the reliability and extensibility of the hs-bindgen code generation pipeline, with major refactors to the name generation, path handling, and Haskell-specific naming. The work reduces naming-related risks, simplifies future feature work, and improves maintainability and onboarding for contributors. A set of targeted maintenance tasks further stabilized the repository and clarified public APIs.
March 2025
33 Commits • 9 Features
Mar 1, 2025March 2025 focused on strengthening the reliability and extensibility of the hs-bindgen code generation pipeline, with major refactors to the name generation, path handling, and Haskell-specific naming. The work reduces naming-related risks, simplifies future feature work, and improves maintainability and onboarding for contributors. A set of targeted maintenance tasks further stabilized the repository and clarified public APIs.
February 2025
7 Commits • 5 Features
Feb 1, 2025February 2025 (2025-02) monthly summary for well-typed/hs-bindgen. Focused on strengthening cross-platform build capabilities, safer code generation, and improved developer ergonomics. Delivered several targeted features, notable improvements in type safety, and code-quality refactors that reduce ambiguity in generated artifacts.
7 Commits • 5 Features
Feb 1, 2025February 2025 (2025-02) monthly summary for well-typed/hs-bindgen. Focused on strengthening cross-platform build capabilities, safer code generation, and improved developer ergonomics. Delivered several targeted features, notable improvements in type safety, and code-quality refactors that reduce ambiguity in generated artifacts.
February 2025
January 2025
19 Commits • 3 Features
Jan 1, 2025January 2025 (well-typed/hs-bindgen): Delivered a substantial modernization of the core codegen pipeline, strengthening parsing/translation, error handling, and FFI readiness while laying the groundwork for a richer type-system and safer bindings. The work enables more reliable bindings generation, easier onboarding for users, and a solid platform for future deriving and documentation initiatives.
January 2025
19 Commits • 3 Features
Jan 1, 2025January 2025 (well-typed/hs-bindgen): Delivered a substantial modernization of the core codegen pipeline, strengthening parsing/translation, error handling, and FFI readiness while laying the groundwork for a richer type-system and safer bindings. The work enables more reliable bindings generation, easier onboarding for users, and a solid platform for future deriving and documentation initiatives.
November 2024
2 Commits • 2 Features
Nov 1, 20242024-11 monthly summary for well-typed/hs-bindgen focusing on delivering practical binding-generation improvements, improved error clarity, and maintainability gains. Highlights include a new example header to illustrate binding generation requirements and a refactor that simplifies error reporting in libclang bindings.
2 Commits • 2 Features
Nov 1, 20242024-11 monthly summary for well-typed/hs-bindgen focusing on delivering practical binding-generation improvements, improved error clarity, and maintainability gains. Highlights include a new example header to illustrate binding generation requirements and a refactor that simplifies error reporting in libclang bindings.
November 2024
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Quality Metrics
Correctness93.8%
Maintainability92.0%
Architecture91.8%
Performance87.2%
AI Usage22.6%
Skills & Technologies
Programming Languages
CC++CabalGitHaskellMakefileMarkdownPerlRustShell
Technical Skills
API DesignAPI DevelopmentAST ManipulationAST TraversalAST manipulationAbstract Syntax Trees (AST)AbstractionBackend DevelopmentBinding GenerationBug FixingBug fixingBuild AutomationBuild System ConfigurationBuild System IntegrationBuild System Management
Repositories Contributed To
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