depyler v3.20.2 Compatibility Update - 50% Examples Now Compile

[noahgift]

Summary

Tested latest depyler v3.20.2 against all 6 argparse examples. example_positional now compiles successfully, improving compatibility from 2/6 (33%) to 3/6 (50%).

Test Results

Example	Status	Details
example_simple	✅ Works	Full support - compiles and runs
example_flags	✅ Works	Full support - compiles and runs
example_positional	✅ Works	NEW - Fixed in v3.20.2 (was failing in v3.20.1)
example_subcommands	❌ Build fails	Subcommand enum comparison issues
example_complex	❌ Build fails	Option type handling issues
example_stdlib	❌ Transpile fails	Expression type not supported

Key Improvement

example_positional now compiles successfully with depyler compile. This was failing in v3.20.1 with Vec formatting issues.

cd examples/example_positional
depyler compile positional_args.py -o test_positional_args
# ✅ Binary created: test_positional_args

Remaining Issues

example_subcommands (Build Fails)

error[E0369]: binary operation `==` cannot be applied to type `Commands`
  --> src/main.rs:37:36
   |
37 |     let _cse_temp_0 = args.command == "clone";
   |                       ------------ ^^ ------- &str
   |                       |
   |                       Commands

Issue: Enum variants need pattern matching instead of string comparison.

example_complex (Build Fails)

error[E0308]: mismatched types
  --> src/main.rs:94:4
   |
94 | if args.count {
   |    ^^^^^^^^^^ expected `bool`, found `Option<String>`

Issue: Optional arguments not properly handled as Option<T> types.

example_stdlib (Transpile Fails)

Error: Failed to transpile Python to Rust
Caused by: Expression type not yet supported

Issue: Python stdlib module patterns not yet supported.

Environment

• depyler version: v3.20.2
• Rust: 1.83.0
• System: Ubuntu 22.04 LTS

Notes

All examples have manual Rust implementations with 100% I/O equivalence validation, ensuring complete test coverage regardless of depyler compile status.

Related

• Updated in commit: 0c9df04
• Documentation: README.md compatibility table updated

[noahgift]

Update: Tested with Latest depyler Source (v3.20.0+47 commits)

Retested all 6 examples with latest depyler source from ../depyler (commit 1a355a7, 47 commits ahead of v3.20.0).

Result: 3/6 examples compile successfully (50%) - unchanged

Example	Status	Notes
example_simple	✅ Works	Clean compilation
example_flags	✅ Works	Clean compilation
example_positional	✅ Works	Clean compilation
example_subcommands	❌ Build fails	Enum pattern matching issues despite DEPYLER-0382 fix
example_complex	❌ Build fails	argparse scope + Exception type issues
example_stdlib	❌ Transpile fails	Expression type not supported

Detailed Errors

example_subcommands: DEPYLER-0382 adds subcommand parsing support, but dispatch logic still broken:

error[E0533]: expected unit struct, unit variant or constant, found struct variant `Commands::Clone`
  --> src/main.rs:37:46
   |
37 |     let _cse_temp_0 = matches\!(args.command, Commands::Clone);
   |                                              ^^^^^^^^^^^^^^^ not a unit struct, unit variant or constant

example_complex: Multiple type errors with custom validators and option handling:

error[E0425]: cannot find value `argparse` in this scope
  --> src/main.rs:24:18
   |
24 |     panic\!("{}", argparse.ArgumentTypeError(format\!("Port must be between 1 and 65535, got {}", port)));

example_stdlib: Transpilation fails before compilation:

Error: Failed to transpile Python to Rust
Caused by: Expression type not yet supported```

### Conclusion

The recent argparse fixes (DEPYLER-0382, 0384, 0385, 0387) improve parsing but don't increase the compile success rate. The 3 basic examples continue to work, while the 3 advanced examples (subcommands, complex validators, stdlib integration) still require manual Rust implementations.