Add bit operator: bit-xor (#5940)

crates/nu-command/src/database/values/dsl/expression.rs

@@ -119,6 +119,7 @@ impl CustomValue for ExprDb {
             | Operator::NotIn
             | Operator::Pow
             | Operator::BitOr
+            | Operator::BitXor
             | Operator::BitAnd
             | Operator::ShiftLeft
             | Operator::ShiftRight

crates/nu-engine/src/eval.rs

@@ -442,6 +442,10 @@ pub fn eval_expression(
                     let rhs = eval_expression(engine_state, stack, rhs)?;
                     lhs.bit_or(op_span, &rhs, expr.span)
                 }
+                Operator::BitXor => {
+                    let rhs = eval_expression(engine_state, stack, rhs)?;
+                    lhs.bit_xor(op_span, &rhs, expr.span)
+                }
                 Operator::BitAnd => {
                     let rhs = eval_expression(engine_state, stack, rhs)?;
                     lhs.bit_and(op_span, &rhs, expr.span)

crates/nu-parser/src/parser.rs

@@ -4107,6 +4107,7 @@ pub fn parse_operator(
         b"not-in" => Operator::NotIn,
         b"mod" => Operator::Modulo,
         b"bit-or" => Operator::BitOr,
+        b"bit-xor" => Operator::BitXor,
         b"bit-and" => Operator::BitAnd,
         b"bit-shl" => Operator::ShiftLeft,
         b"bit-shr" => Operator::ShiftRight,

crates/nu-parser/src/type_check.rs

@@ -492,27 +492,29 @@ pub fn math_result_type(
                     )
                 }
             },
-            Operator::ShiftLeft | Operator::ShiftRight | Operator::BitAnd | Operator::BitOr => {
-                match (&lhs.ty, &rhs.ty) {
-                    (Type::Int, Type::Int) => (Type::Int, None),
+            Operator::ShiftLeft
+            | Operator::ShiftRight
+            | Operator::BitOr
+            | Operator::BitXor
+            | Operator::BitAnd => match (&lhs.ty, &rhs.ty) {
+                (Type::Int, Type::Int) => (Type::Int, None),
 
-                    (Type::Any, _) => (Type::Any, None),
-                    (_, Type::Any) => (Type::Any, None),
-                    _ => {
-                        *op = Expression::garbage(op.span);
-                        (
-                            Type::Any,
-                            Some(ParseError::UnsupportedOperation(
-                                op.span,
-                                lhs.span,
-                                lhs.ty.clone(),
-                                rhs.span,
-                                rhs.ty.clone(),
-                            )),
-                        )
-                    }
+                (Type::Any, _) => (Type::Any, None),
+                (_, Type::Any) => (Type::Any, None),
+                _ => {
+                    *op = Expression::garbage(op.span);
+                    (
+                        Type::Any,
+                        Some(ParseError::UnsupportedOperation(
+                            op.span,
+                            lhs.span,
+                            lhs.ty.clone(),
+                            rhs.span,
+                            rhs.ty.clone(),
+                        )),
+                    )
                 }
-            }
+            },
         },
         _ => {
             *op = Expression::garbage(op.span);

crates/nu-protocol/src/ast/expression.rs

@@ -49,7 +49,7 @@ impl Expression {
                     | Operator::In
                     | Operator::NotIn => 80,
                     Operator::BitAnd => 75,
-                    // Operator::BitXor => 70,
+                    Operator::BitXor => 70,
                     Operator::BitOr => 60,
                     Operator::And => 50,
                     Operator::Or => 40,

crates/nu-protocol/src/ast/operator.rs

@@ -27,6 +27,7 @@ pub enum Operator {
     StartsWith,
     EndsWith,
     BitOr,
+    BitXor,
     BitAnd,
     ShiftLeft,
     ShiftRight,
@@ -53,6 +54,7 @@ impl Display for Operator {
             Operator::Or => write!(f, "||"),
             Operator::Pow => write!(f, "**"),
             Operator::BitOr => write!(f, "bit-or"),
+            Operator::BitXor => write!(f, "bit-xor"),
             Operator::BitAnd => write!(f, "bit-and"),
             Operator::ShiftLeft => write!(f, "bit-shl"),
             Operator::ShiftRight => write!(f, "bit-shr"),

crates/nu-protocol/src/value/mod.rs

@@ -2297,6 +2297,25 @@ impl Value {
         }
     }
 
+    pub fn bit_xor(&self, op: Span, rhs: &Value, span: Span) -> Result<Value, ShellError> {
+        match (self, rhs) {
+            (Value::Int { val: lhs, .. }, Value::Int { val: rhs, .. }) => Ok(Value::Int {
+                span,
+                val: *lhs ^ rhs,
+            }),
+            (Value::CustomValue { val: lhs, span }, rhs) => {
+                lhs.operation(*span, Operator::BitXor, op, rhs)
+            }
+            _ => Err(ShellError::OperatorMismatch {
+                op_span: op,
+                lhs_ty: self.get_type(),
+                lhs_span: self.span()?,
+                rhs_ty: rhs.get_type(),
+                rhs_span: rhs.span()?,
+            }),
+        }
+    }
+
     pub fn bit_and(&self, op: Span, rhs: &Value, span: Span) -> Result<Value, ShellError> {
         match (self, rhs) {
             (Value::Int { val: lhs, .. }, Value::Int { val: rhs, .. }) => Ok(Value::Int {

src/tests/test_math.rs

@@ -55,6 +55,16 @@ fn or() -> TestResult {
     run_test("true || false", "true")
 }
 
+#[test]
+fn bit_xor() -> TestResult {
+    run_test("4 bit-xor 4", "0")
+}
+
+#[test]
+fn bit_xor_add() -> TestResult {
+    run_test("4 bit-xor 2 + 2", "0")
+}
+
 #[test]
 fn bit_and() -> TestResult {
     run_test("2 bit-and 4", "0")