modify parser

pyproject.toml

@@ -10,3 +10,4 @@ anf = "anf.cli:main"
 
 [tool.pytest.ini_options]
 testpaths = ["tests"]
+pythonpath = ["src"]

src/anf/parser.py

@@ -10,8 +10,9 @@ TOKEN_RE = re.compile(
     \s*(
         \(|\)|
         !|
-        \+|\*|
-        AND|OR|
+        OR|XOR|
+        \+|⊕|
+        AND|\*|⸱|
         0|1|
         X\d+|
         [A-Za-z_][A-Za-z0-9_]*
@@ -53,16 +54,24 @@ class Parser:
         return p
 
     def parse_or(self) -> Poly:
-        left = self.parse_and()
+        left = self.parse_xor()
         while self.peek() in ("OR", "+"):
             self.eat()
-            right = self.parse_and()
+            right = self.parse_xor()
             left = poly_xor(poly_xor(left, right), poly_and(left, right))
         return left
 
+    def parse_xor(self) -> Poly:
+        left = self.parse_and()
+        while self.peek() in ("XOR", "⊕"):
+            self.eat()
+            right = self.parse_and()
+            left = poly_xor(left, right)
+        return left
+
     def parse_and(self) -> Poly:
         left = self.parse_not()
-        while self.peek() in ("AND", "*"):
+        while self.peek() in ("AND", "*", "⸱"):
             self.eat()
             right = self.parse_not()
             left = poly_and(left, right)