language: add binary operators (#6)

- unary binary not
- infix bitwise and
- infix bitwise or
- infix bitwise exclusive or (xor)

ast/src/main/kotlin/gay/pizza/pork/ast/InfixOperator.kt

@@ -18,5 +18,8 @@ enum class InfixOperator(val token: String) {
   Lesser("<"),
   Greater(">"),
   GreaterEqual(">="),
-  LesserEqual("<=")
+  LesserEqual("<="),
+  BinaryAnd("&"),
+  BinaryOr("|"),
+  BinaryExclusiveOr("^")
 }

ast/src/main/kotlin/gay/pizza/pork/ast/PrefixOperator.kt

@@ -9,5 +9,6 @@ import kotlinx.serialization.Serializable
 enum class PrefixOperator(val token: String) {
   Negate("!"),
   UnaryPlus("+"),
-  UnaryMinus("-")
+  UnaryMinus("-"),
+  BinaryNot("~")
 }