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feat!: FixedWidthParser 2.0 — bytes-only API, native library and Python package - #79

Merged

GabrielMarquezMatte merged 68 commits into

developfrom

feat/v2-api

Oct 25, 2026

Merged

feat!: FixedWidthParser 2.0 — bytes-only API, native library and Python package#79
GabrielMarquezMatte merged 68 commits into
developfrom
feat/v2-api

Commits on Oct 15, 2026
Commits on Oct 16, 2026
- perf(writer): format numbers straight into the column and write plain doubles as scaled integers
  GabrielMarquezMatte
  committed
  4fce9bb
- refactor(generator): read one column in its own method
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  committed
  759aafc
- build: align .editorconfig with the style guide and pin LF line endings
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  committed
  868d528
- docs: add a style guide, an architecture map and the writer measurements
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  committed
  b6f25b2
- feat(reader): aggregate a file in parallel
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  committed
  a800a14
- feat(reader): aggregate a stream in parallel
  
  GabrielMarquezMatte
  and
  claude
  committed
  a32b1d5
- feat(reader)!: drop PipeReader reading in favour of AsStream
  
  GabrielMarquezMatte
  and
  claude
  committed
  d36b958
Commits on Oct 24, 2026
- feat(layout): build attribute layouts as FixedWidthLayout<T> objects
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  committed
  ff98723
- feat(reader): read and aggregate through a FixedWidthLayout<T>
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  committed
  0eb52a7
- feat(writer): write generated and layout models through FixedWidth
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  committed
  ae1ca4a
- feat(layout): describe a layout fluently with FixedWidthLayout.Build
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  committed
  1b09d6e
- feat!: make FixedWidth the only entry point and drop the runtime classes
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  committed
  b640bcb
- test: publish a fluent-layout app with NativeAOT and record the read/write timings
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  02da8af
- docs: document FixedWidthLayout and the single FixedWidth API
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  9b017fc
- test: take the best of three allocation measurements per guard
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  committed
  c57d36a
- feat(layout): add nullable decoded and nullable converted fluent columns
  GabrielMarquezMatte
  committed
  cff0c39
- refactor!: move user-facing types to the root namespace and plumbing to Infrastructure
  
  GabrielMarquezMatte
  and
  claude
  committed
  bcfc200
- refactor!: name parameters the same way across the API
  
  GabrielMarquezMatte
  and
  claude
  committed
  9eee4ac
- refactor!: fold FixedWidthParallelOptions into FixedWidthReaderOptions
  
  GabrielMarquezMatte
  and
  claude
  committed
  cb5ee86
- refactor!: pass per-column parse and format settings as extensible structs
  
  GabrielMarquezMatte
  and
  claude
  committed
  18c1545
- refactor: hide generated-code plumbing from IntelliSense
  
  GabrielMarquezMatte
  and
  claude
  committed
  55c74ea
- docs: describe the settled public surface and the 2.x compatibility rules
  
  GabrielMarquezMatte
  and
  claude
  committed
  c556c08
- feat: accept ref struct models in the readers and aggregates
  GabrielMarquezMatte
  committed
  487d889
- refactor: run parallel aggregation over an internal line sink and source
  
  GabrielMarquezMatte
  and
  claude
  committed
  6a1504b
- feat(native): scaffold the NativeAOT library
  
  GabrielMarquezMatte
  and
  claude
  committed
  b291855
- feat(native): build layouts from C column specs
  GabrielMarquezMatte
  committed
  7b8d214
- feat(native): read fixed-width files into a columnar table
  
  GabrielMarquezMatte
  and
  claude
  committed
  030629c
- feat(native): read in parallel by byte range
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  committed
  903894d
- feat(native): read in batches
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  committed
  e1aee57
- feat(native): export reads through the Arrow C Data Interface
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  committed
  7608ee7
- feat(native): write columnar tables
  GabrielMarquezMatte
  committed
  57029c1
- feat(native): C header and smoke test
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  committed
  7629e84
- feat(python): fixedwidth package over the native library
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  committed
  5e3ac88
- docs: benchmark the Python reader against pandas.read_fwf
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  committed
  60c45c0
- feat(cpp): header-only C++ wrapper
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  committed
  9d30a6e
- ci: build and test the native library and its bindings
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  committed
  d3cefe1
- fix(native): valid UTF-8, size limits and UTC timestamps
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  committed
  c130f5c
- docs(native): document UTF-8 replacement and UTC timestamps in the header
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  committed
  251d786
- fix: add IDE1006 to WarningsNotAsErrors in Directory.Build.props
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  committed
  2b94e05
- ci: publish and run the NativeAOT smoke app
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  committed
  b7baca0
- fix(python): exact, range-checked decimal writes
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  committed
  68b4b8b
- fix: merge stream aggregation results incrementally with bounded pending work
  GabrielMarquezMatte
  committed
  3c55352
- fix(generator): include inherited mapped columns
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  committed
  e9a5ad8
- fix: return the rented buffer when strict decoding throws
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  committed
  26e5672
- fix(cpp): import library for the target architecture
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  committed
  3cf7130
- refactor(ci): clean up comments and improve workflow clarity
  GabrielMarquezMatte
  committed
  1236724
- perf: parse doubles with csFastFloat in comma cultures
  GabrielMarquezMatte
  committed
  6ec4caa
- perf: cache UTF-8 columns in front of StringPool
  GabrielMarquezMatte
  committed
  6b40b40
- feat: enhance documentation for FixedWidthMapper and add example usage
  GabrielMarquezMatte
  committed
  ef287ed
- docs: split the README into a usage guide and a benchmarks page
  GabrielMarquezMatte
  committed
  a03957c
- docs: bring the docs up to date with the code
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  committed
  6268482
- build: turn off package validation while 2.0 is in development
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  committed
  b7db52d
- perf: replace csFastFloat with ports of ExcelReader's FastDouble and FastDecimal
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  committed
  5241a19
- refactor: collapse duplicated parse, format and read helpers
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  committed
  8da9f7a
- refactor(native): share column constants and the invalid-argument helper
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  committed
  4fdcdcf
- refactor(generator): make ColumnInfo a record struct
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  committed
  d230e3c
- perf: parse digit-only dates and integers straight from the bytes
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  committed
  ecbe0cf
- perf(native): cut page faults and serial work from parallel reads
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  committed
  fff8a5a
- bench: add a Python write benchmark against savetxt and polars
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  committed
  d6f30d5
- perf: write integers and digit-only dates directly, and write files in parallel
  GabrielMarquezMatte
  committed
  b4d22cf
- refactor: reorganize import statements for clarity
  GabrielMarquezMatte
  committed
  a313504
Commits on Oct 25, 2026
- perf(native): parse partitions straight into the final columns
  GabrielMarquezMatte
  committed
  c8d1d5a
- ci(release): publish Python wheels to PyPI as fixedwidthparser
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  committed
  3f3b55a
- Merge develop
  GabrielMarquezMatte
  committed
  b34af7a
- ci: run each workflow only when its paths change
  GabrielMarquezMatte
  committed
  7f47469

Commits

Commits on Oct 15, 2026

Commits on Oct 16, 2026

Commits on Oct 24, 2026

Commits on Oct 25, 2026