junrushao opened a new pull request, #454:
URL: https://github.com/apache/tvm-ffi/pull/454
## Summary
- Add a centralized, reflection-based repr system (`ffi.ReprPrint`) that
handles cycles and DAG duplicates via BFS traversal
- Built-in types (String, Tensor, Shape, Array, List, Map) have custom
formatters; user-defined types fall back to generic reflection-based repr
showing `type_key@0xADDR(field=value, ...)`
- Add `refl::repr_fields({"field_a", "field_b"})` tag struct to restrict
which fields appear in repr output (omitting = show all fields, `{}` = no
fields)
- Python `__repr__` on Object/Array/List/Map now delegates to `ffi.ReprPrint`
- SmallStr/SmallBytes POD types rendered as quoted strings in repr
## Format examples
```
42 # int
"hello world" # string
Tensor.float32[3, 4]@cpu:0@0x1234 # tensor
Shape([5, 6]) # shape
[1, 2, 3] # array/list
{"key": "value"} # map
testing.TestIntPair@0x1234(a=10, b=20) # user object (all fields)
testing.TestCxxClass@0x1234(v_f64=3.5) # user object (repr_fields
subset)
testing.TestIntPair@0x1234 # duplicate reference (short
form)
```
## Test plan
- [x] 17 new tests in `tests/python/test_repr.py` covering primitives,
strings, containers, tensors, shapes, user objects, repr_fields, duplicate
references, Python `__repr__` integration, and empty containers
- [x] Updated existing `test_container.py::test_repr` for new string quoting
format
- [x] Full test suite passes (401 Python tests, 276 C++ tests)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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