clang-tidy: resolve modernize-use-designated-initializers

[knoepfel]

Resolve modernize-use-designated-initializers clang-tidy warnings.

• Code quality

  • Resolved 69 modernize-use-designated-initializers clang-tidy warnings.
  • Converted aggregate initialization across core, form, Phlex, plugin, and Python integration code to designated initializers.
  • Preserved existing values, behavior, ownership, and control flow.

• API

  • Renamed layer_spec fields:
    • parent_layer_name to parent_layer
    • total_per_parent_data_cell to count
    • starting_value to start_at
  • Updated layer generation and all affected call sites.

• Python integration

  • Converted Python C API method tables, module definitions, and PyTypeObject initializers to designated initialization.
  • Preserved version-specific fields, metadata, callbacks, and type behavior.

• Tests

  • Updated layer-generator, form, framework, filtering, product, and execution tests to use designated initialization.
  • Preserved test hierarchies, assertions, counts, and expected behavior.

• Documentation

  • Marked the clang-tidy check complete in docs/dev/clang-tidy-fixes-2026-04.md.
  • Recorded 69 fixes under PR #835.

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📝 Walkthrough

Walkthrough

The PR converts positional aggregate initialization to designated initialization across runtime code, Python wrappers, and tests. It also renames layer_spec fields and updates the clang-tidy completion record. Runtime values and behavior remain unchanged.

Changes

Initializer modernization

Layer / File(s)	Summary
Layer specification field migration plugins/layer_generator.*, plugins/generate_layers.cpp, test/*layer*, test/*provider*, test/unfold.cpp	Renames layer fields to parent_layer, count, and start_at. Updates generator logic and layer configuration tests.
Runtime aggregate initialization updates form/*, phlex/app/load_module.cpp, phlex/core/*	Uses designated initializers for technology constants, form records, plugin wrappers, graph bundles, messages, and computational-edge entries.
Python C API initializer updates plugins/python/src/*wrap.cpp	Uses designated initializers for Python method tables and type objects, including version-dependent fields.
Test coverage and clang-tidy tracking test/*, docs/dev/clang-tidy-fixes-2026-04.md	Updates remaining test aggregates and marks modernize-use-designated-initializers complete.

Estimated code review effort: 2 (Simple) | ~15 minutes

Merge Risk: 🟡 Moderate · up to d9a3f

The PR still leaves several changed C++ identifiers in non-lower_case form across technology and Python wrapper declarations, so the stated clang-tidy cleanup is incomplete and the current head is not merge-ready until those names are corrected without changing Python-visible or serialized strings.

Suggested reviewers: greenc-fnal

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 4.55% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 22 functions across 34 files. (1 skipped: 1 unsupported.)	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely identifies the main change: resolving the specified clang-tidy check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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Inline comments:
In `@form/core/technology.hpp`:
- Around line 31-33: Rename ROOT_TTREE, ROOT_RNTUPLE, and HDF5 to lower_case
identifiers and update all C++ references in form/core/technology.hpp lines
31-33; rename PhlexConfig_Type in plugins/python/src/configwrap.cpp line 231,
PhlexDataCellIndex_Type in plugins/python/src/dciwrap.cpp line 44,
PhlexLifeline_Type in plugins/python/src/lifelinewrap.cpp line 48, and
PhlexModule_Type and PhlexSource_Type in plugins/python/src/modulewrap.cpp lines
1281 and 1507, updating their C++ references while preserving Python-visible
tp_name values and serialized technology strings.

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📥 Commits

Reviewing files that changed from the base of the PR and between ca7a4d2 and d9a3f16.

📒 Files selected for processing (35)

• docs/dev/clang-tidy-fixes-2026-04.md
• form/core/technology.hpp
• form/form/form_source_type_registry.cpp
• form/form_source.cpp
• phlex/app/load_module.cpp
• phlex/core/filter.cpp
• phlex/core/framework_graph.hpp
• phlex/core/make_computational_edges.cpp
• plugins/generate_layers.cpp
• plugins/layer_generator.cpp
• plugins/layer_generator.hpp
• plugins/python/src/configwrap.cpp
• plugins/python/src/dciwrap.cpp
• plugins/python/src/lifelinewrap.cpp
• plugins/python/src/modulewrap.cpp
• test/allowed_families.cpp
• test/cached_execution.cpp
• test/demo-giantdata/unfold_transform_fold.cpp
• test/filter.cpp
• test/filter_impl.cpp
• test/fold.cpp
• test/fold_duplicate_layer_name_test.cpp
• test/form/form_basics_test.cpp
• test/form/reader.cpp
• test/form/writer.cpp
• test/framework_graph.cpp
• test/hierarchical_nodes.cpp
• test/layer_generator.cpp
• test/memory-checks/many_events.cpp
• test/output_products.cpp
• test/product_selecting.cpp
• test/provider_test.cpp
• test/type_distinction.cpp
• test/unfold.cpp
• test/vector_of_abstract_types.cpp

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• GitHub Check: Analyze cpp with CodeQL
• GitHub Check: build (gcc, none)
• GitHub Check: coverage
• GitHub Check: clang-tidy-check

🧰 Additional context used

📓 Path-based instructions (5)

**/*.{cpp,cc,cxx,h,hpp}

📄 CodeRabbit inference engine (.github/copilot-instructions.md)

**/*.{cpp,cc,cxx,h,hpp}: Use clang-format tool for all C++ code formatting (VS Code auto-formats on save); configuration defined in .clang-format with 100-character line limit and 2-space indentation
Follow clang-tidy recommendations defined in .clang-tidy

Files:

• plugins/generate_layers.cpp
• form/core/technology.hpp
• test/demo-giantdata/unfold_transform_fold.cpp
• test/fold.cpp
• test/fold_duplicate_layer_name_test.cpp
• phlex/app/load_module.cpp
• test/cached_execution.cpp
• plugins/python/src/lifelinewrap.cpp
• test/filter.cpp
• test/memory-checks/many_events.cpp
• form/form_source.cpp
• test/allowed_families.cpp
• phlex/core/filter.cpp
• test/product_selecting.cpp
• test/type_distinction.cpp
• test/filter_impl.cpp
• form/form/form_source_type_registry.cpp
• test/vector_of_abstract_types.cpp
• plugins/python/src/modulewrap.cpp
• test/output_products.cpp
• plugins/layer_generator.hpp
• phlex/core/make_computational_edges.cpp
• plugins/python/src/dciwrap.cpp
• phlex/core/framework_graph.hpp
• test/framework_graph.cpp
• test/hierarchical_nodes.cpp
• test/provider_test.cpp
• test/unfold.cpp
• test/form/writer.cpp
• test/form/form_basics_test.cpp
• test/form/reader.cpp
• test/layer_generator.cpp
• plugins/layer_generator.cpp
• plugins/python/src/configwrap.cpp

**/*.{hpp,cpp}

📄 CodeRabbit inference engine (AGENTS.md)

**/*.{hpp,cpp}: Use .hpp for header files, .cpp for implementation, and *_test.cpp for test files in C++
Enforce 100-character line limit and 2-space indentation in C++ code via .clang-format
Use QualifierAlignment: Right (east-const) style: int const x not const int x in C++
Use PointerAlignment: Left in C++ (pointer * attached to type, not variable name)
All C++ identifiers must use lower_case naming: namespaces, classes, structs, enums, functions, variables, parameters, members, and constants
Exception to C++ naming: template parameters use CamelCase
Exception to C++ naming: macros use UPPER_CASE
Private, protected, and constant members in C++ must have a trailing underscore (_), no trailing underscore on anything else
Use enum class preferred over plain enum in C++
Use std::shared_ptr for shared ownership, std::unique_ptr for exclusive ownership, raw pointers for non-owning references only in C++
Use functors with agent-noun pattern: ModelEvaluator evaluate_model(...) in C++
Apply .clang-tidy checks for bugprone, cert, clang-analyzer, concurrency, cppcoreguidelines, misc, modernize, performance, portability, and readability as defined in the .clang-tidy configuration file
Use phlex:: namespace for core code, phlex::experimental:: for experimental features in C++

Files:

• plugins/generate_layers.cpp
• form/core/technology.hpp
• test/demo-giantdata/unfold_transform_fold.cpp
• test/fold.cpp
• test/fold_duplicate_layer_name_test.cpp
• phlex/app/load_module.cpp
• test/cached_execution.cpp
• plugins/python/src/lifelinewrap.cpp
• test/filter.cpp
• test/memory-checks/many_events.cpp
• form/form_source.cpp
• test/allowed_families.cpp
• phlex/core/filter.cpp
• test/product_selecting.cpp
• test/type_distinction.cpp
• test/filter_impl.cpp
• form/form/form_source_type_registry.cpp
• test/vector_of_abstract_types.cpp
• plugins/python/src/modulewrap.cpp
• test/output_products.cpp
• plugins/layer_generator.hpp
• phlex/core/make_computational_edges.cpp
• plugins/python/src/dciwrap.cpp
• phlex/core/framework_graph.hpp
• test/framework_graph.cpp
• test/hierarchical_nodes.cpp
• test/provider_test.cpp
• test/unfold.cpp
• test/form/writer.cpp
• test/form/form_basics_test.cpp
• test/form/reader.cpp
• test/layer_generator.cpp
• plugins/layer_generator.cpp
• plugins/python/src/configwrap.cpp

**/*.hpp

📄 CodeRabbit inference engine (AGENTS.md)

Avoid boolean parameters in C++ interfaces; prefer enumerations instead

Files:

• form/core/technology.hpp
• plugins/layer_generator.hpp
• phlex/core/framework_graph.hpp

**/*.md

📄 CodeRabbit inference engine (.github/copilot-instructions.md)

**/*.md: All Markdown files must follow markdownlint rule MD012: no multiple consecutive blank lines (never more than one blank line in a row)
All Markdown files must follow markdownlint rule MD022: headings must be surrounded by exactly one blank line before and after
All Markdown files must follow markdownlint rule MD031: fenced code blocks must be surrounded by exactly one blank line before and after
All Markdown files must follow markdownlint rule MD032: lists must be surrounded by exactly one blank line before and after (including after headings and code blocks)
All Markdown files must follow markdownlint rule MD034: no bare URLs (use markdown link syntax like [text](destination) instead of plain URLs)
All Markdown files must follow markdownlint rule MD036: use # headings for titles, not Bold:
All Markdown files must follow markdownlint rule MD040: always specify code block language (for example, use 'bash', 'python', '```text', etc.)

**/*.md: Do not use multiple consecutive blank lines in Markdown (MD012)
Surround Markdown headings with exactly one blank line (MD022)
Surround Markdown fenced code blocks with exactly one blank line (MD031)
Surround Markdown lists with exactly one blank line (MD032)
Do not use bare URLs in Markdown; use [text](url) syntax instead (MD034)
Use # headings in Markdown, not **Bold** for section titles (MD036)
Always specify language on fenced code blocks in Markdown (MD040)

Files:

• docs/dev/clang-tidy-fixes-2026-04.md

plugins/python/**/*.cpp

📄 CodeRabbit inference engine (AGENTS.md)

plugins/python/**/*.cpp: Use std::runtime_error for C++ runtime failures; propagate Python exceptions via PyErr_SetString/PyErr_Format; return nullptr on error; call PyErr_Clear() when recovering in Python/C++ integration
Use manual Py_INCREF/Py_DECREF for reference counting and PyGILRAII RAII wrapper for GIL management in C++ code that interacts with Python
For GC-tracked Python types in C++: use Py_TPFLAGS_HAVE_GC, implement tp_traverse and tp_clear, call PyObject_GC_UnTrack before deallocation

Files:

• plugins/python/src/lifelinewrap.cpp
• plugins/python/src/modulewrap.cpp
• plugins/python/src/dciwrap.cpp
• plugins/python/src/configwrap.cpp

🔇 Additional comments (34)

form/form/form_source_type_registry.cpp (1)

42-44: LGTM!

form/form_source.cpp (1)

146-147: LGTM!

phlex/app/load_module.cpp (1)

129-129: LGTM!

Also applies to: 141-141, 161-161

phlex/core/filter.cpp (1)

74-74: LGTM!

phlex/core/framework_graph.hpp (1)

79-82: LGTM!

phlex/core/make_computational_edges.cpp (1)

63-64: LGTM!

Also applies to: 96-97, 147-147

plugins/python/src/configwrap.cpp (1)

224-227: LGTM!

Also applies to: 229-230, 233-289

plugins/python/src/dciwrap.cpp (1)

36-40: LGTM!

Also applies to: 42-43, 46-102

plugins/python/src/lifelinewrap.cpp (1)

49-106: LGTM!

plugins/python/src/modulewrap.cpp (1)

1268-1277: LGTM!

Also applies to: 1279-1280, 1282-1339, 1498-1503, 1505-1506, 1508-1565

plugins/layer_generator.hpp (1)

43-45: LGTM!

plugins/generate_layers.cpp (1)

36-38: LGTM!

plugins/layer_generator.cpp (1)

96-98: LGTM!

Also applies to: 113-121, 157-159

test/allowed_families.cpp (1)

38-40: LGTM!

test/cached_execution.cpp (1)

56-58: LGTM!

test/demo-giantdata/unfold_transform_fold.cpp (1)

49-51: LGTM!

test/fold.cpp (1)

64-65: LGTM!

Also applies to: 108-109

test/fold_duplicate_layer_name_test.cpp (1)

61-63: LGTM!

test/layer_generator.cpp (1)

26-26: LGTM!

Also applies to: 40-41, 56-57, 72-74, 86-91

test/output_products.cpp (1)

71-71: LGTM!

test/product_selecting.cpp (1)

35-35: LGTM!

test/provider_test.cpp (1)

81-81: LGTM!

Also applies to: 110-110, 181-181

test/memory-checks/many_events.cpp (1)

18-18: LGTM!

test/type_distinction.cpp (1)

47-47: LGTM!

test/unfold.cpp (1)

108-108: LGTM!

Also applies to: 176-176, 209-209

test/vector_of_abstract_types.cpp (1)

43-43: LGTM!

test/filter.cpp (1)

108-108: LGTM!

Also applies to: 135-135, 158-158, 189-189, 216-216

docs/dev/clang-tidy-fixes-2026-04.md (1)

121-122: LGTM!

test/filter_impl.cpp (1)

22-22: LGTM!

Also applies to: 32-37

test/form/form_basics_test.cpp (1)

197-198: LGTM!

Also applies to: 217-218, 427-428, 440-441

test/form/reader.cpp (1)

100-116: LGTM!

Also applies to: 172-172

test/form/writer.cpp (1)

104-104: LGTM!

Also applies to: 115-115, 126-128, 154-154

test/framework_graph.cpp (1)

52-67: LGTM!

Also applies to: 89-89, 127-127, 222-222

test/hierarchical_nodes.cpp (1)

54-54: LGTM!

Also applies to: 82-83

[pcanal]

LGTM.

[Copilot]

Pull request overview

Converts aggregate construction to C++ designated initializers while preserving behavior across core, FORM, plugins, Python bindings, and tests.

Changes:

• Modernizes 69 aggregate initializers.
• Renames layer_spec fields and updates all usages.
• Marks the clang-tidy check complete.

Reviewed changes

Copilot reviewed 35 out of 35 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/vector_of_abstract_types.cpp	Updates layer specification initialization.
test/unfold.cpp	Updates unfold test layer specifications.
test/type_distinction.cpp	Updates test layer initialization.
test/provider_test.cpp	Updates provider test layer specifications.
test/product_selecting.cpp	Uses renamed layer_spec fields.
test/output_products.cpp	Updates layer initialization.
test/memory-checks/many_events.cpp	Updates high-volume layer specification.
test/layer_generator.cpp	Updates layer-generator test initializers.
test/hierarchical_nodes.cpp	Modernizes result and layer initialization.
test/framework_graph.cpp	Modernizes driver and layer bundles.
test/form/writer.cpp	Modernizes FORM product records.
test/form/reader.cpp	Modernizes FORM product records.
test/form/form_basics_test.cpp	Modernizes FORM identifiers and products.
test/fold.cpp	Updates fold test layer specifications.
test/fold_duplicate_layer_name_test.cpp	Updates duplicate-layer test setup.
test/filter.cpp	Updates filtering test layers.
test/filter_impl.cpp	Modernizes filter decision records.
test/demo-giantdata/unfold_transform_fold.cpp	Updates pipeline layer specifications.
test/cached_execution.cpp	Updates cached-execution hierarchy setup.
test/allowed_families.cpp	Updates family hierarchy setup.
plugins/python/src/modulewrap.cpp	Modernizes Python methods and type objects.
plugins/python/src/lifelinewrap.cpp	Modernizes the lifeline type object.
plugins/python/src/dciwrap.cpp	Modernizes data-cell Python definitions.
plugins/python/src/configwrap.cpp	Modernizes mapping and type definitions.
plugins/layer_generator.hpp	Renames layer_spec fields.
plugins/layer_generator.cpp	Adopts renamed layer fields.
plugins/generate_layers.cpp	Updates configured layer construction.
phlex/core/make_computational_edges.cpp	Modernizes input-port records.
phlex/core/framework_graph.hpp	Modernizes source bundle construction.
phlex/core/filter.cpp	Modernizes message construction.
phlex/app/load_module.cpp	Modernizes plugin wrapper construction.
form/form/form_source_type_registry.cpp	Modernizes registry entries.
form/form_source.cpp	Modernizes FORM product construction.
form/core/technology.hpp	Modernizes technology constants.
docs/dev/clang-tidy-fixes-2026-04.md	Records completion under PR 835.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@            Coverage Diff             @@
##             main     #835      +/-   ##
==========================================
- Coverage   84.18%   84.16%   -0.03%     
==========================================
  Files         174      174              
  Lines        7419     7427       +8     
  Branches      888      888              
==========================================
+ Hits         6246     6251       +5     
- Misses        889      890       +1     
- Partials      284      286       +2     

Flag	Coverage Δ
scripts	80.09% <ø> (ø)
unittests	86.12% <100.00%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
form/core/technology.hpp	100.00% <ø> (ø)
form/form/form_source_type_registry.cpp	95.45% <100.00%> (+0.21%)	⬆️
form/form_source.cpp	55.91% <100.00%> (+0.47%)	⬆️
phlex/app/load_module.cpp	86.27% <100.00%> (ø)
phlex/core/filter.cpp	71.42% <100.00%> (ø)
phlex/core/framework_graph.hpp	100.00% <100.00%> (ø)
phlex/core/make_computational_edges.cpp	100.00% <100.00%> (ø)
plugins/generate_layers.cpp	100.00% <100.00%> (ø)
plugins/layer_generator.cpp	100.00% <100.00%> (ø)
plugins/layer_generator.hpp	100.00% <ø> (ø)
... and 4 more

... and 2 files with indirect coverage changes

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[aolivier23]

Heads up: the FORM files this PR modifies are about to get big changes in #830

[knoepfel]

Heads up: the FORM files this PR modifies are about to get big changes in #830

@aolivier23, shall I hold off on merging then?

[aolivier23]

FORM changes look good to me. Thanks Kyle.