effekt-lang/effekt
Jan 2025 – Aug 2025
5 Months active
Languages Used
CEffektJavaScriptLLVM IRScalaYAML
Technical Skills
Backend DevelopmentCompiler DevelopmentLLVMLanguage ImplementationTestingBuild Systems
Mattis Böckle
PROFILE
Mattis Böckle
Mattis Derbock contributed to the effekt-lang/effekt repository by developing and optimizing core compiler features over five months. He enhanced the LLVM backend with new math intrinsics and improved data handling, moving key data structures from C to LLVM IR for better optimization and reduced binary size. His work included parser updates to support generic constructors and list literals with trailing commas, as well as targeted bug fixes for character semantics and byte array comparisons. Using C, Scala, and LLVM IR, Mattis focused on backend development, code generation, and language design, delivering robust, maintainable improvements that strengthened the language’s core infrastructure.
Overall Statistics
Feature vs Bugs
57%Features
Repository Contributions
8Total
Bugs
3
Commits
8
Features
4
Lines of code
541
Activity Months5
Work History
August 2025
1 Commits • 1 Features
Aug 1, 2025Monthly summary for 2025-08 focused on Effekt-lang/effekt. Delivered a core language parser enhancement: adding support for type parameters (tparams) in constructors. This enables generic constructors, aligning the language with existing generic patterns and improving code reuse. Implemented parsing changes to capture tparams in constructor definitions and added a dedicated test verifying type inference for a parameterized constructor. Commit reference: 319039ce02f7fa08cdb0bca17f9cfc4252d2cd0b (Add tparams to constructors (#1104)).
1 Commits • 1 Features
Aug 1, 2025Monthly summary for 2025-08 focused on Effekt-lang/effekt. Delivered a core language parser enhancement: adding support for type parameters (tparams) in constructors. This enables generic constructors, aligning the language with existing generic patterns and improving code reuse. Implemented parsing changes to capture tparams in constructor definitions and added a dedicated test verifying type inference for a parameterized constructor. Commit reference: 319039ce02f7fa08cdb0bca17f9cfc4252d2cd0b (Add tparams to constructors (#1104)).
August 2025
July 2025
1 Commits
Jul 1, 2025Month: 2025-07 — Focused on correctness of Char handling in Effekt and expanding test coverage. Delivered a bug fix for the Char default value and added tests to ensure long-term correctness. The change is tracked in effekt-lang/effekt with a clear commit, enabling reliable numeric/character semantics for downstream code and libraries.
July 2025
1 Commits
Jul 1, 2025Month: 2025-07 — Focused on correctness of Char handling in Effekt and expanding test coverage. Delivered a bug fix for the Char default value and added tests to ensure long-term correctness. The change is tracked in effekt-lang/effekt with a clear commit, enabling reliable numeric/character semantics for downstream code and libraries.
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025: Focused on LLVM backend enhancements for Effekt to improve performance and reduce code size. Moved core data structures (Array, ByteArray, Ref) from C to LLVM IR to enable stronger optimization and inlining, and emitted most declared function definitions as private by default to shrink binary size. Updated the LLVM pretty printer and transformer to support the new linkage parameter, and reimplemented supporting C utilities in LLVM to streamline the toolchain. These changes establish a more efficient, maintainable backend with faster execution paths and smaller deployments.
2 Commits • 1 Features
Apr 1, 2025April 2025: Focused on LLVM backend enhancements for Effekt to improve performance and reduce code size. Moved core data structures (Array, ByteArray, Ref) from C to LLVM IR to enable stronger optimization and inlining, and emitted most declared function definitions as private by default to shrink binary size. Updated the LLVM pretty printer and transformer to support the new linkage parameter, and reimplemented supporting C utilities in LLVM to streamline the toolchain. These changes establish a more efficient, maintainable backend with faster execution paths and smaller deployments.
April 2025
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 summary for effekt-lang/effekt: Delivered targeted improvements that enhance language usability and CI reliability, driving developer productivity and more predictable builds. Key work includes a feature enhancement for list literal parsing and a CI stability fix, with expanded tests to cover new syntax edge cases and reduce regressions. Repository: effekt-lang/effekt.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 summary for effekt-lang/effekt: Delivered targeted improvements that enhance language usability and CI reliability, driving developer productivity and more predictable builds. Key work includes a feature enhancement for list literal parsing and a CI stability fix, with expanded tests to cover new syntax edge cases and reduce regressions. Repository: effekt-lang/effekt.
January 2025
2 Commits • 1 Features
Jan 1, 2025January 2025 — The Effekt LLVM backend received a focused set of capabilities and robustness improvements, delivering business value through enhanced numeric support and reliable data handling. The work reduced friction for users implementing math-heavy code and ensured correct ordering semantics for binary data, positioning the platform for broader adoption and future feature growth.
2 Commits • 1 Features
Jan 1, 2025January 2025 — The Effekt LLVM backend received a focused set of capabilities and robustness improvements, delivering business value through enhanced numeric support and reliable data handling. The work reduced friction for users implementing math-heavy code and ensured correct ordering semantics for binary data, positioning the platform for broader adoption and future feature growth.
January 2025
Activity
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Quality Metrics
Correctness91.2%
Maintainability90.0%
Architecture88.8%
Performance85.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
CEffektJavaScriptLLVM IRScalaYAML
Technical Skills
Backend DevelopmentBuild SystemsCI/CDCode GenerationCompiler DevelopmentCompiler ToolchainsLLVMLLVM IRLanguage DesignLanguage ImplementationLow-Level OptimizationMemory ManagementParser DevelopmentParsingTesting
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