clear out some old TODOs

README.md

@@ -233,5 +233,3 @@ my_pattern.ref(_make_my_subpattern(), offset=..., ...)
 * Tests tests tests
 * check renderpather
 * pather and renderpather examples
-* context manager for retool
-* allow a specific mismatch when connecting ports

examples/tutorial/pather.py

@@ -265,6 +265,12 @@ def main() -> None:
     # when using pather.retool().
     pather.path_to('VCC', None, -50_000, out_ptype='m1wire')
 
+    # Now extend GND out to x=-50_000, using M2 for a portion of the path.
+    # We can use `pather.toolctx()` to temporarily retool, instead of calling `retool()` twice.
+    with pather.toolctx(M2_tool, keys=['GND']):
+        pather.path_to('GND', None, -40_000)
+    pather.path_to('GND', None, -50_000)
+
     # Save the pather's pattern into our library
     library['Pather_and_BasicTool'] = pather.pattern
 

masque/builder/builder.py

@@ -2,7 +2,7 @@
 Simplified Pattern assembly (`Builder`)
 """
 from typing import Self
-from collections.abc import Sequence, Mapping
+from collections.abc import Iterable, Sequence, Mapping
 import copy
 import logging
 from functools import wraps
@@ -226,6 +226,7 @@ class Builder(PortList):
             inherit_name: bool = True,
             set_rotation: bool | None = None,
             append: bool = False,
+            ok_connections: Iterable[tuple[str, str]] = (),
             ) -> Self:
         """
         Wrapper around `Pattern.plug` which allows a string for `other`.
@@ -260,6 +261,11 @@ class Builder(PortList):
             append: If `True`, `other` is appended instead of being referenced.
                 Note that this does not flatten  `other`, so its refs will still
                 be refs (now inside `self`).
+            ok_connections: Set of "allowed" ptype combinations. Identical
+                ptypes are always allowed to connect, as is `'unk'` with
+                any other ptypte. Non-allowed ptype connections will emit a
+                warning. Order is ignored, i.e. `(a, b)` is equivalent to
+                `(b, a)`.
 
         Returns:
             self
@@ -293,6 +299,7 @@ class Builder(PortList):
             inherit_name=inherit_name,
             set_rotation=set_rotation,
             append=append,
+            ok_connections=ok_connections,
             )
         return self
 

masque/builder/pather.py

@@ -2,9 +2,10 @@
 Manual wire/waveguide routing (`Pather`)
 """
 from typing import Self
-from collections.abc import Sequence, MutableMapping, Mapping
+from collections.abc import Sequence, MutableMapping, Mapping, Iterator
 import copy
 import logging
+from contextlib import contextmanager
 from pprint import pformat
 
 import numpy
@@ -281,6 +282,37 @@ class Pather(Builder):
                 self.tools[key] = tool
         return self
 
+    @contextmanager
+    def toolctx(
+            self,
+            tool: Tool,
+            keys: str | Sequence[str | None] | None = None,
+            ) -> Iterator[Self]:
+        """
+          Context manager for temporarily `retool`-ing and reverting the `retool`
+        upon exiting the context.
+
+        Args:
+            tool: The new `Tool` to use for the given ports.
+            keys: Which ports the tool should apply to. `None` indicates the default tool,
+                used when there is no matching entry in `self.tools` for the port in question.
+
+        Returns:
+            self
+        """
+        if keys is None or isinstance(keys, str):
+            keys = [keys]
+        saved_tools = {kk: self.tools.get(kk, None) for kk in keys}      # If not in self.tools, save `None`
+        try:
+            yield self.retool(tool=tool, keys=keys)
+        finally:
+            for kk, tt in saved_tools.items():
+                if tt is None:
+                    # delete if present
+                    self.tools.pop(tt, None)
+                else:
+                    self.tools[kk] = tt
+
     def path(
             self,
             portspec: str,

masque/library.py

@@ -542,7 +542,7 @@ class ILibraryView(Mapping[str, 'Pattern'], metaclass=ABCMeta):
         Return:
             Topologically sorted list of pattern names.
         """
-        return list(TopologicalSorter(self.child_graph()).static_order())
+        return cast(list[str], list(TopologicalSorter(self.child_graph()).static_order()))
 
     def find_refs_local(
             self,

masque/pattern.py

@@ -1225,6 +1225,7 @@ class Pattern(PortList, AnnotatableImpl, Mirrorable):
             inherit_name: bool = True,
             set_rotation: bool | None = None,
             append: bool = False,
+            ok_connections: Iterable[tuple[str, str]] = (),
             ) -> Self:
         """
         Instantiate or append a pattern into the current pattern, connecting
@@ -1270,6 +1271,11 @@ class Pattern(PortList, AnnotatableImpl, Mirrorable):
             append: If `True`, `other` is appended instead of being referenced.
                 Note that this does not flatten  `other`, so its refs will still
                 be refs (now inside `self`).
+            ok_connections: Set of "allowed" ptype combinations. Identical
+                ptypes are always allowed to connect, as is `'unk'` with
+                any other ptypte. Non-allowed ptype connections will emit a
+                warning. Order is ignored, i.e. `(a, b)` is equivalent to
+                `(b, a)`.
 
         Returns:
             self
@@ -1300,6 +1306,7 @@ class Pattern(PortList, AnnotatableImpl, Mirrorable):
             map_in,
             mirrored=mirrored,
             set_rotation=set_rotation,
+            ok_connections=ok_connections,
             )
 
         # get rid of plugged ports

masque/ports.py

@@ -419,6 +419,7 @@ class PortList(metaclass=ABCMeta):
             *,
             mirrored: bool = False,
             set_rotation: bool | None = None,
+            ok_connections: Iterable[tuple[str, str]] = (),
             ) -> tuple[NDArray[numpy.float64], float, NDArray[numpy.float64]]:
         """
         Given a device `other` and a mapping `map_in` specifying port connections,
@@ -435,6 +436,11 @@ class PortList(metaclass=ABCMeta):
                 port with `rotation=None`), `set_rotation` must be provided
                 to indicate how much `other` should be rotated. Otherwise,
                 `set_rotation` must remain `None`.
+            ok_connections: Set of "allowed" ptype combinations. Identical
+                ptypes are always allowed to connect, as is `'unk'` with
+                any other ptypte. Non-allowed ptype connections will emit a
+                warning. Order is ignored, i.e. `(a, b)` is equivalent to
+                `(b, a)`.
 
         Returns:
             - The (x, y) translation (performed last)
@@ -451,6 +457,7 @@ class PortList(metaclass=ABCMeta):
             map_in=map_in,
             mirrored=mirrored,
             set_rotation=set_rotation,
+            ok_connections=ok_connections,
             )
 
     @staticmethod
@@ -461,13 +468,14 @@ class PortList(metaclass=ABCMeta):
             *,
             mirrored: bool = False,
             set_rotation: bool | None = None,
+            ok_connections: Iterable[tuple[str, str]] = (),
             ) -> tuple[NDArray[numpy.float64], float, NDArray[numpy.float64]]:
         """
         Given two sets of ports (s_ports and o_ports) and a mapping `map_in`
           specifying port connections, find the transform which will correctly
           align the specified o_ports onto their respective s_ports.
 
-        Args:t
+        Args:
             s_ports: A list of stationary ports
             o_ports: A list of ports which are to be moved/mirrored.
             map_in: dict of `{'s_port': 'o_port'}` mappings, specifying
@@ -479,6 +487,11 @@ class PortList(metaclass=ABCMeta):
                 port with `rotation=None`), `set_rotation` must be provided
                 to indicate how much `o_ports` should be rotated. Otherwise,
                 `set_rotation` must remain `None`.
+            ok_connections: Set of "allowed" ptype combinations. Identical
+                ptypes are always allowed to connect, as is `'unk'` with
+                any other ptypte. Non-allowed ptype connections will emit a
+                warning. Order is ignored, i.e. `(a, b)` is equivalent to
+                `(b, a)`.
 
         Returns:
             - The (x, y) translation (performed last)
@@ -502,7 +515,8 @@ class PortList(metaclass=ABCMeta):
             o_offsets[:, 1] *= -1
             o_rotations *= -1
 
-        type_conflicts = numpy.array([st != ot and 'unk' not in (st, ot)
+        ok_pairs = {tuple(sorted(pair)) for pair in ok_connections if pair[0] != pair[1]}
+        type_conflicts = numpy.array([(st != ot) and ('unk' not in (st, ot)) and (tuple(sorted((st, ot))) not in ok_pairs)
                                       for st, ot in zip(s_types, o_types, strict=True)])
         if type_conflicts.any():
             msg = 'Ports have conflicting types:\n'
@@ -523,8 +537,8 @@ class PortList(metaclass=ABCMeta):
         if not numpy.allclose(rotations[:1], rotations):
             rot_deg = numpy.rad2deg(rotations)
             msg = 'Port orientations do not match:\n'
-            for nn, (k, v) in enumerate(map_in.items()):
+            for nn, (kk, vv) in enumerate(map_in.items()):
-                msg += f'{k} | {rot_deg[nn]:g} | {v}\n'
+                msg += f'{kk} | {rot_deg[nn]:g} | {vv}\n'
             raise PortError(msg)
 
         pivot = o_offsets[0].copy()
@@ -532,8 +546,8 @@ class PortList(metaclass=ABCMeta):
         translations = s_offsets - o_offsets
         if not numpy.allclose(translations[:1], translations):
             msg = 'Port translations do not match:\n'
-            for nn, (k, v) in enumerate(map_in.items()):
+            for nn, (kk, vv) in enumerate(map_in.items()):
-                msg += f'{k} | {translations[nn]} | {v}\n'
+                msg += f'{kk} | {translations[nn]} | {vv}\n'
             raise PortError(msg)
 
         return translations[0], rotations[0], o_offsets[0]

masque/shapes/arc.py

@@ -233,7 +233,7 @@ class Arc(Shape):
         r0, r1 = self.radii
 
         # Convert from polar angle to ellipse parameter (for [rx*cos(t), ry*sin(t)] representation)
-        a_ranges = self._angles_to_parameters()
+        a_ranges = cast(tuple[tuple[float, float], tuple[float, float]], self._angles_to_parameters())
 
         # Approximate perimeter via numerical integration