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Extend analyzer and generator for dict comprehension #6

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Summary

  • handle ast.DictComp in analyzer variable inference and expression typing
  • translate dictionary comprehensions to C++ map construction
  • update docs to mark list comprehension support and note dictionary comprehension work
  • add dictionary comprehension tests for analyzer and conversion

Testing

  • pip install -r requirements.txt
  • pytest -q

https://chatgpt.com/codex/tasks/task_e_684a4fdadb248332ac5e6cafd0b39e03

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Pull Request Overview

This PR extends the Python-to-C++ conversion tool to support dictionary comprehensions alongside the existing list comprehension support. The implementation adds AST handling for ast.DictComp nodes in both the analyzer and code generator components.

  • Adds dictionary comprehension support to the type inference system
  • Implements C++ map construction translation for dictionary comprehensions
  • Updates documentation to reflect list comprehension completion and dictionary comprehension progress

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file
File Description
src/analyzer/code_analyzer_fixed.py Adds ast.DictComp handling for variable type inference and expression typing
src/converter/code_generator_fixed.py Implements C++ lambda-based translation for both list and dictionary comprehensions
src/analyzer/code_analyzer.py Improves tuple assignment handling with better target type checking
src/converter/code_generator.py Updates method signatures to use AnalysisResult type instead of generic Dict
tests/test_code_analyzer_fixed.py Adds comprehensive tests for list and dictionary comprehension type inference
tests/test_conversion_fixed.py Adds end-to-end tests for both list and dictionary comprehension conversion
docs/implementation_gaps_report.md Updates feature status to mark list comprehensions as complete and note dictionary comprehension progress

)
elif isinstance(node, ast.DictComp):
key_type = self._infer_cpp_type(node.key, local_vars)
value_type = self._infer_cpp_type(node.value, local_vars)
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Copilot AI Jul 23, 2025

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The code assumes only one generator exists (index [0]) without checking if the generators list is empty. This could cause an IndexError if a malformed AST is processed.

Suggested change
value_type = self._infer_cpp_type(node.value, local_vars)
value_type = self._infer_cpp_type(node.value, local_vars)
if not node.generators:
raise ValueError("Malformed AST: Dict comprehension has no generators.")

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Copilot AI added a commit that referenced this pull request Jul 23, 2025
…g, performance optimizations

Co-authored-by: CrazyDubya <[email protected]>
CrazyDubya added a commit that referenced this pull request Jul 23, 2025
…slve them all... test code at end make sure fucntional (#12)

* Initial plan

* Implement PRs #4, #6, #9, #10: Math functions, comprehensions, caching, performance optimizations

Co-authored-by: CrazyDubya <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: CrazyDubya <[email protected]>
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