mirror of
https://github.com/Z3Prover/z3
synced 2026-07-15 11:35:42 +00:00
b1aa1e6ddc
This PR adds a first-class Python API helper for expressing regex
constraints in familiar Python regex syntax and translating them into Z3
regex terms. The translator is implemented as a separate module
(`z3regex.py`) as requested, keeping regex conversion logic isolated
from core API files.
- **New Python regex translator module**
- Adds `src/api/python/z3/z3regex.py`.
- Introduces `regex_to_re(pattern, flags=0, ctx=None)` to convert parsed
Python regex constructs into Z3 regex expressions.
- Supports core regular constructs (literals, classes/ranges,
alternation, grouping, quantifiers, categories, wildcard).
- Raises `NotImplementedError` for unsupported non-regular constructs
(e.g., features outside regular languages).
- **API/package integration**
- Exposes the module via `src/api/python/z3/__init__.py`.
- Includes `z3/z3regex.py` in Python binding file copy/install flow in
`src/api/python/CMakeLists.txt`.
- **Doctest entrypoint support**
- Extends `src/api/python/z3test.py` with `z3regex` mode so translator
doctests can be run consistently with existing Python API doctest flows.
```python
from z3 import *
from z3.z3regex import regex_to_re
x = String("x")
r = regex_to_re(r"(ab|cd)+\d{2}")
s = Solver()
s.add(InRe(x, r))
```
---------
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
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| .. | ||
| ackermannization | ||
| api | ||
| ast | ||
| cmd_context | ||
| math | ||
| model | ||
| muz | ||
| nlsat | ||
| opt | ||
| params | ||
| parsers | ||
| qe | ||
| sat | ||
| shell | ||
| smt | ||
| solver | ||
| tactic | ||
| test | ||
| util | ||
| CMakeLists.txt | ||