diff --git a/Lexer.g4 b/Lexer.g4
index 59d39b13..a4ab81be 100644
--- a/Lexer.g4
+++ b/Lexer.g4
@@ -38,7 +38,7 @@ PERCENTAGE_PORTION_LITERAL: [0-9]+ ('.' [0-9]+)? '%';
 STRING: '"' ('\\"' | ~[\r\n"])* '"';
 
 IDENTIFIER: [a-z]+ [a-z_]*;
-NUMBER: MINUS? [0-9]+ ('_' [0-9]+)*;
+NUMBER: [0-9]+ ('_' [0-9]+)*;
 ASSET: [A-Z][A-Z0-9]* ('/' [0-9]+)?;
 
 ACCOUNT_START: '@' -> pushMode(ACCOUNT_MODE);
diff --git a/Numscript.g4 b/Numscript.g4
index 7aa15d61..ae136055 100644
--- a/Numscript.g4
+++ b/Numscript.g4
@@ -19,6 +19,7 @@ valueExpr:
 	| NUMBER														# numberLiteral
 	| PERCENTAGE_PORTION_LITERAL									# percentagePortionLiteral
 	| monetaryLit													# monetaryLiteral
+	| op=MINUS valueExpr					# prefixExpr
 	| left = valueExpr op = DIV right = valueExpr					# infixExpr
 	| left = valueExpr op = (PLUS | MINUS) right = valueExpr		# infixExpr
 	| LPARENS valueExpr RPARENS										# parenthesizedExpr
diff --git a/internal/analysis/check.go b/internal/analysis/check.go
index 36a38c89..1e39e47c 100644
--- a/internal/analysis/check.go
+++ b/internal/analysis/check.go
@@ -468,6 +468,16 @@ func (res *CheckResult) checkTypeOf(lit parser.ValueExpr, typeHint string) strin
 			return TypeAny
 		}
 
+	case *parser.Prefix:
+		switch lit.Operator {
+		case parser.PrefixOperatorMinus:
+			res.unifyNodeWith(lit, res.GetExprType(lit.Expr))
+			return res.checkHasOneOfTypes(lit.Expr, []string{TypeNumber, TypeMonetary})
+
+		default:
+			return TypeAny
+		}
+
 	case *parser.AccountInterpLiteral:
 		res.checkAccountInterpolationVersion(*lit)
 
@@ -511,6 +521,20 @@ func (res *CheckResult) checkInfixOverload(bin *parser.BinaryInfix, allowed []st
 	return TypeAny
 }
 
+func (res *CheckResult) checkHasOneOfTypes(expr parser.ValueExpr, allowed []string) string {
+	exprType := res.checkTypeOf(expr, allowed[0])
+
+	if exprType == TypeAny || slices.Contains(allowed, exprType) {
+		return exprType
+	}
+
+	res.pushDiagnostic(expr.GetRange(), TypeMismatch{
+		Expected: strings.Join(allowed, "|"),
+		Got:      exprType,
+	})
+	return TypeAny
+}
+
 func (res *CheckResult) assertHasType(lit parser.ValueExpr, requiredType string, actualType string) {
 	if requiredType == TypeAny || actualType == TypeAny || requiredType == actualType {
 		return
@@ -671,6 +695,19 @@ func (res CheckResult) tryEvaluatingNumberExpr(expr parser.ValueExpr) *big.Int {
 	case *parser.NumberLiteral:
 		return big.NewInt(int64(expr.Number))
 
+	case *parser.Prefix:
+		switch expr.Operator {
+		case parser.PrefixOperatorMinus:
+			evExpr := res.tryEvaluatingNumberExpr(expr.Expr)
+			if evExpr == nil {
+				return nil
+			}
+			return new(big.Int).Neg(evExpr)
+
+		default:
+			return nil
+		}
+
 	case *parser.BinaryInfix:
 		switch expr.Operator {
 		case parser.InfixOperatorPlus:
diff --git a/internal/analysis/hover.go b/internal/analysis/hover.go
index c7448e0e..15b43035 100644
--- a/internal/analysis/hover.go
+++ b/internal/analysis/hover.go
@@ -183,6 +183,9 @@ func hoverOnExpression(lit parser.ValueExpr, position parser.Position) Hover {
 			return hover
 		}
 
+	case *parser.Prefix:
+		return hoverOnExpression(lit.Expr, position)
+
 	case *parser.FnCall:
 		return hoverOnFnCall(*lit, position)
 	}
diff --git a/internal/interpreter/evaluate_expr.go b/internal/interpreter/evaluate_expr.go
index 04b1abc9..41d08aa7 100644
--- a/internal/interpreter/evaluate_expr.go
+++ b/internal/interpreter/evaluate_expr.go
@@ -69,7 +69,6 @@ func (st *programState) evaluateExpr(expr parser.ValueExpr) (Value, InterpreterE
 		return value, nil
 
 	case *parser.BinaryInfix:
-
 		switch expr.Operator {
 		case parser.InfixOperatorPlus:
 			return st.plusOp(expr.Left, expr.Right)
@@ -85,6 +84,16 @@ func (st *programState) evaluateExpr(expr parser.ValueExpr) (Value, InterpreterE
 			return nil, nil
 		}
 
+	case *parser.Prefix:
+		switch expr.Operator {
+		case parser.PrefixOperatorMinus:
+			return st.unaryNegOp(expr.Expr)
+
+		default:
+			utils.NonExhaustiveMatchPanic[any](expr.Operator)
+			return nil, nil
+		}
+
 	case *parser.FnCall:
 		if !st.varOriginPosition {
 			err := st.checkFeatureFlag(flags.ExperimentalMidScriptFunctionCall)
@@ -214,6 +223,25 @@ func (st *programState) divOp(rng parser.Range, left parser.ValueExpr, right par
 	return Portion(*rat), nil
 }
 
+func (st *programState) unaryNegOp(expr parser.ValueExpr) (Value, InterpreterError) {
+	evExpr, err := evaluateExprAs(st, expr, expectOneOf(
+		expectMapped(expectMonetary, func(m Monetary) opNeg {
+			return m
+		}),
+
+		// while "x.map(identity)" is the same as "x", just writing "expectNumber" would't typecheck
+		expectMapped(expectNumber, func(bi big.Int) opNeg {
+			return MonetaryInt(bi)
+		}),
+	))
+
+	if err != nil {
+		return nil, err
+	}
+
+	return (*evExpr).evalNeg(st)
+}
+
 func castToString(v Value, rng parser.Range) (string, InterpreterError) {
 	switch v := v.(type) {
 	case AccountAddress:
diff --git a/internal/interpreter/infix_overloads.go b/internal/interpreter/infix_overloads.go
index a0a9d0f3..386f0785 100644
--- a/internal/interpreter/infix_overloads.go
+++ b/internal/interpreter/infix_overloads.go
@@ -80,3 +80,26 @@ func (m Monetary) evalSub(st *programState, other parser.ValueExpr) (Value, Inte
 	}, nil
 
 }
+
+type opNeg interface {
+	evalNeg(st *programState) (Value, InterpreterError)
+}
+
+var _ opNeg = (*MonetaryInt)(nil)
+var _ opNeg = (*Monetary)(nil)
+
+func (m MonetaryInt) evalNeg(st *programState) (Value, InterpreterError) {
+	m1 := big.Int(m)
+	neg := new(big.Int).Neg(&m1)
+	return MonetaryInt(*neg), nil
+}
+
+func (m Monetary) evalNeg(st *programState) (Value, InterpreterError) {
+	m1 := big.Int(m.Amount)
+	neg := new(big.Int).Neg(&m1)
+	return Monetary{
+		Asset:  m.Asset,
+		Amount: MonetaryInt(*neg),
+	}, nil
+
+}
diff --git a/internal/interpreter/testdata/script-tests/minus-infix-monetary.num b/internal/interpreter/testdata/script-tests/minus-infix-monetary.num
new file mode 100644
index 00000000..22bd42a4
--- /dev/null
+++ b/internal/interpreter/testdata/script-tests/minus-infix-monetary.num
@@ -0,0 +1,4 @@
+send [EUR/2 100] - [EUR/2 1] (
+  source = @world
+  destination = @dest
+)
diff --git a/internal/interpreter/testdata/script-tests/minus-infix-monetary.num.specs.json b/internal/interpreter/testdata/script-tests/minus-infix-monetary.num.specs.json
new file mode 100644
index 00000000..0727d9b2
--- /dev/null
+++ b/internal/interpreter/testdata/script-tests/minus-infix-monetary.num.specs.json
@@ -0,0 +1,16 @@
+{
+  "$schema": "https://raw.githubusercontent.com/formancehq/numscript/main/specs.schema.json",
+  "testCases": [
+    {
+      "it": "should subtract the monetaries",
+      "expect.postings": [
+        {
+          "source": "world",
+          "destination": "dest",
+          "amount": 99,
+          "asset": "EUR/2"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/internal/interpreter/testdata/script-tests/minus-infix-number.num b/internal/interpreter/testdata/script-tests/minus-infix-number.num
new file mode 100644
index 00000000..67a34da4
--- /dev/null
+++ b/internal/interpreter/testdata/script-tests/minus-infix-number.num
@@ -0,0 +1,4 @@
+send [EUR/2 100-1] (
+  source = @world
+  destination = @dest
+)
diff --git a/internal/interpreter/testdata/script-tests/minus-infix-number.num.specs.json b/internal/interpreter/testdata/script-tests/minus-infix-number.num.specs.json
new file mode 100644
index 00000000..336bb433
--- /dev/null
+++ b/internal/interpreter/testdata/script-tests/minus-infix-number.num.specs.json
@@ -0,0 +1,16 @@
+{
+  "$schema": "https://raw.githubusercontent.com/formancehq/numscript/main/specs.schema.json",
+  "testCases": [
+    {
+      "it": "should subtract the numbers",
+      "expect.postings": [
+        {
+          "source": "world",
+          "destination": "dest",
+          "amount": 99,
+          "asset": "EUR/2"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/internal/interpreter/testdata/script-tests/minus-prefix-number.num b/internal/interpreter/testdata/script-tests/minus-prefix-number.num
new file mode 100644
index 00000000..7032cda2
--- /dev/null
+++ b/internal/interpreter/testdata/script-tests/minus-prefix-number.num
@@ -0,0 +1,4 @@
+send -[EUR/2 -100] (
+  source = @world
+  destination = @dest
+)
diff --git a/internal/interpreter/testdata/script-tests/minus-prefix-number.num.specs.json b/internal/interpreter/testdata/script-tests/minus-prefix-number.num.specs.json
new file mode 100644
index 00000000..68dac993
--- /dev/null
+++ b/internal/interpreter/testdata/script-tests/minus-prefix-number.num.specs.json
@@ -0,0 +1,16 @@
+{
+  "$schema": "https://raw.githubusercontent.com/formancehq/numscript/main/specs.schema.json",
+  "testCases": [
+    {
+      "it": "should subtract the numbers",
+      "expect.postings": [
+        {
+          "source": "world",
+          "destination": "dest",
+          "amount": 100,
+          "asset": "EUR/2"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/internal/parser/__snapshots__/parser_test.snap b/internal/parser/__snapshots__/parser_test.snap
index 13841727..85eacf76 100755
--- a/internal/parser/__snapshots__/parser_test.snap
+++ b/internal/parser/__snapshots__/parser_test.snap
@@ -2173,12 +2173,19 @@ parser.Program{
                         },
                         Asset: "EUR/2",
                     },
-                    Amount: &parser.NumberLiteral{
+                    Amount: &parser.Prefix{
                         Range: parser.Range{
                             Start: parser.Position{Character:12, Line:0},
                             End:   parser.Position{Character:16, Line:0},
                         },
-                        Number: -100,
+                        Operator: "-",
+                        Expr:     &parser.NumberLiteral{
+                            Range: parser.Range{
+                                Start: parser.Position{Character:13, Line:0},
+                                End:   parser.Position{Character:16, Line:0},
+                            },
+                            Number: 100,
+                        },
                     },
                 },
             },
diff --git a/internal/parser/antlrParser/Lexer.interp b/internal/parser/antlrParser/Lexer.interp
index b56a2642..c7f5a72d 100644
--- a/internal/parser/antlrParser/Lexer.interp
+++ b/internal/parser/antlrParser/Lexer.interp
@@ -142,4 +142,4 @@ DEFAULT_MODE
 ACCOUNT_MODE
 
 atn:
-[4, 0, 42, 357, 6, -1, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 2, 20, 7, 20, 2, 21, 7, 21, 2, 22, 7, 22, 2, 23, 7, 23, 2, 24, 7, 24, 2, 25, 7, 25, 2, 26, 7, 26, 2, 27, 7, 27, 2, 28, 7, 28, 2, 29, 7, 29, 2, 30, 7, 30, 2, 31, 7, 31, 2, 32, 7, 32, 2, 33, 7, 33, 2, 34, 7, 34, 2, 35, 7, 35, 2, 36, 7, 36, 2, 37, 7, 37, 2, 38, 7, 38, 2, 39, 7, 39, 2, 40, 7, 40, 2, 41, 7, 41, 2, 42, 7, 42, 1, 0, 4, 0, 90, 8, 0, 11, 0, 12, 0, 91, 1, 0, 1, 0, 1, 1, 4, 1, 97, 8, 1, 11, 1, 12, 1, 98, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 106, 8, 2, 10, 2, 12, 2, 109, 9, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 3, 1, 3, 1, 3, 1, 3, 5, 3, 120, 8, 3, 10, 3, 12, 3, 123, 9, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 4, 1, 4, 1, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 17, 1, 17, 1, 17, 1, 17, 1, 17, 1, 18, 1, 18, 1, 18, 1, 18, 1, 18, 1, 19, 1, 19, 1, 20, 1, 20, 1, 21, 1, 21, 1, 22, 1, 22, 1, 23, 1, 23, 1, 24, 1, 24, 1, 25, 1, 25, 1, 26, 1, 26, 1, 27, 1, 27, 1, 28, 1, 28, 1, 29, 1, 29, 1, 30, 1, 30, 1, 31, 1, 31, 1, 32, 4, 32, 255, 8, 32, 11, 32, 12, 32, 256, 1, 32, 1, 32, 4, 32, 261, 8, 32, 11, 32, 12, 32, 262, 3, 32, 265, 8, 32, 1, 32, 1, 32, 1, 33, 1, 33, 1, 33, 1, 33, 5, 33, 273, 8, 33, 10, 33, 12, 33, 276, 9, 33, 1, 33, 1, 33, 1, 34, 4, 34, 281, 8, 34, 11, 34, 12, 34, 282, 1, 34, 5, 34, 286, 8, 34, 10, 34, 12, 34, 289, 9, 34, 1, 35, 3, 35, 292, 8, 35, 1, 35, 4, 35, 295, 8, 35, 11, 35, 12, 35, 296, 1, 35, 1, 35, 4, 35, 301, 8, 35, 11, 35, 12, 35, 302, 5, 35, 305, 8, 35, 10, 35, 12, 35, 308, 9, 35, 1, 36, 1, 36, 5, 36, 312, 8, 36, 10, 36, 12, 36, 315, 9, 36, 1, 36, 1, 36, 4, 36, 319, 8, 36, 11, 36, 12, 36, 320, 3, 36, 323, 8, 36, 1, 37, 1, 37, 1, 37, 1, 37, 1, 38, 1, 38, 1, 38, 1, 38, 1, 39, 1, 39, 4, 39, 335, 8, 39, 11, 39, 12, 39, 336, 1, 39, 5, 39, 340, 8, 39, 10, 39, 12, 39, 343, 9, 39, 1, 40, 4, 40, 346, 8, 40, 11, 40, 12, 40, 347, 1, 40, 1, 40, 1, 41, 1, 41, 1, 41, 1, 41, 1, 42, 1, 42, 2, 107, 121, 0, 43, 2, 1, 4, 2, 6, 3, 8, 4, 10, 5, 12, 6, 14, 7, 16, 8, 18, 9, 20, 10, 22, 11, 24, 12, 26, 13, 28, 14, 30, 15, 32, 16, 34, 17, 36, 18, 38, 19, 40, 20, 42, 21, 44, 22, 46, 23, 48, 24, 50, 25, 52, 26, 54, 27, 56, 28, 58, 29, 60, 30, 62, 31, 64, 32, 66, 33, 68, 34, 70, 35, 72, 36, 74, 37, 76, 38, 78, 39, 80, 0, 82, 40, 84, 41, 86, 42, 2, 0, 1, 10, 3, 0, 9, 10, 13, 13, 32, 32, 2, 0, 10, 10, 13, 13, 1, 0, 48, 57, 3, 0, 10, 10, 13, 13, 34, 34, 1, 0, 97, 122, 2, 0, 95, 95, 97, 122, 1, 0, 65, 90, 2, 0, 48, 57, 65, 90, 3, 0, 48, 57, 95, 95, 97, 122, 5, 0, 45, 45, 48, 57, 65, 90, 95, 95, 97, 122, 376, 0, 2, 1, 0, 0, 0, 0, 4, 1, 0, 0, 0, 0, 6, 1, 0, 0, 0, 0, 8, 1, 0, 0, 0, 0, 10, 1, 0, 0, 0, 0, 12, 1, 0, 0, 0, 0, 14, 1, 0, 0, 0, 0, 16, 1, 0, 0, 0, 0, 18, 1, 0, 0, 0, 0, 20, 1, 0, 0, 0, 0, 22, 1, 0, 0, 0, 0, 24, 1, 0, 0, 0, 0, 26, 1, 0, 0, 0, 0, 28, 1, 0, 0, 0, 0, 30, 1, 0, 0, 0, 0, 32, 1, 0, 0, 0, 0, 34, 1, 0, 0, 0, 0, 36, 1, 0, 0, 0, 0, 38, 1, 0, 0, 0, 0, 40, 1, 0, 0, 0, 0, 42, 1, 0, 0, 0, 0, 44, 1, 0, 0, 0, 0, 46, 1, 0, 0, 0, 0, 48, 1, 0, 0, 0, 0, 50, 1, 0, 0, 0, 0, 52, 1, 0, 0, 0, 0, 54, 1, 0, 0, 0, 0, 56, 1, 0, 0, 0, 0, 58, 1, 0, 0, 0, 0, 60, 1, 0, 0, 0, 0, 62, 1, 0, 0, 0, 0, 64, 1, 0, 0, 0, 0, 66, 1, 0, 0, 0, 0, 68, 1, 0, 0, 0, 0, 70, 1, 0, 0, 0, 0, 72, 1, 0, 0, 0, 0, 74, 1, 0, 0, 0, 0, 76, 1, 0, 0, 0, 0, 78, 1, 0, 0, 0, 0, 86, 1, 0, 0, 0, 1, 82, 1, 0, 0, 0, 1, 84, 1, 0, 0, 0, 2, 89, 1, 0, 0, 0, 4, 96, 1, 0, 0, 0, 6, 100, 1, 0, 0, 0, 8, 115, 1, 0, 0, 0, 10, 128, 1, 0, 0, 0, 12, 133, 1, 0, 0, 0, 14, 137, 1, 0, 0, 0, 16, 144, 1, 0, 0, 0, 18, 156, 1, 0, 0, 0, 20, 161, 1, 0, 0, 0, 22, 166, 1, 0, 0, 0, 24, 169, 1, 0, 0, 0, 26, 172, 1, 0, 0, 0, 28, 182, 1, 0, 0, 0, 30, 191, 1, 0, 0, 0, 32, 201, 1, 0, 0, 0, 34, 211, 1, 0, 0, 0, 36, 217, 1, 0, 0, 0, 38, 222, 1, 0, 0, 0, 40, 227, 1, 0, 0, 0, 42, 229, 1, 0, 0, 0, 44, 231, 1, 0, 0, 0, 46, 233, 1, 0, 0, 0, 48, 235, 1, 0, 0, 0, 50, 237, 1, 0, 0, 0, 52, 239, 1, 0, 0, 0, 54, 241, 1, 0, 0, 0, 56, 243, 1, 0, 0, 0, 58, 245, 1, 0, 0, 0, 60, 247, 1, 0, 0, 0, 62, 249, 1, 0, 0, 0, 64, 251, 1, 0, 0, 0, 66, 254, 1, 0, 0, 0, 68, 268, 1, 0, 0, 0, 70, 280, 1, 0, 0, 0, 72, 291, 1, 0, 0, 0, 74, 309, 1, 0, 0, 0, 76, 324, 1, 0, 0, 0, 78, 328, 1, 0, 0, 0, 80, 332, 1, 0, 0, 0, 82, 345, 1, 0, 0, 0, 84, 351, 1, 0, 0, 0, 86, 355, 1, 0, 0, 0, 88, 90, 7, 0, 0, 0, 89, 88, 1, 0, 0, 0, 90, 91, 1, 0, 0, 0, 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5, 101, 0, 0, 219, 220, 5, 112, 0, 0, 220, 221, 5, 116, 0, 0, 221, 37, 1, 0, 0, 0, 222, 223, 5, 115, 0, 0, 223, 224, 5, 97, 0, 0, 224, 225, 5, 118, 0, 0, 225, 226, 5, 101, 0, 0, 226, 39, 1, 0, 0, 0, 227, 228, 5, 40, 0, 0, 228, 41, 1, 0, 0, 0, 229, 230, 5, 41, 0, 0, 230, 43, 1, 0, 0, 0, 231, 232, 5, 91, 0, 0, 232, 45, 1, 0, 0, 0, 233, 234, 5, 93, 0, 0, 234, 47, 1, 0, 0, 0, 235, 236, 5, 123, 0, 0, 236, 49, 1, 0, 0, 0, 237, 238, 5, 125, 0, 0, 238, 51, 1, 0, 0, 0, 239, 240, 5, 44, 0, 0, 240, 53, 1, 0, 0, 0, 241, 242, 5, 61, 0, 0, 242, 55, 1, 0, 0, 0, 243, 244, 5, 42, 0, 0, 244, 57, 1, 0, 0, 0, 245, 246, 5, 43, 0, 0, 246, 59, 1, 0, 0, 0, 247, 248, 5, 45, 0, 0, 248, 61, 1, 0, 0, 0, 249, 250, 5, 47, 0, 0, 250, 63, 1, 0, 0, 0, 251, 252, 5, 92, 0, 0, 252, 65, 1, 0, 0, 0, 253, 255, 7, 2, 0, 0, 254, 253, 1, 0, 0, 0, 255, 256, 1, 0, 0, 0, 256, 254, 1, 0, 0, 0, 256, 257, 1, 0, 0, 0, 257, 264, 1, 0, 0, 0, 258, 260, 5, 46, 0, 0, 259, 261, 7, 2, 0, 0, 260, 259, 1, 0, 0, 0, 261, 262, 1, 0, 0, 0, 262, 260, 1, 0, 0, 0, 262, 263, 1, 0, 0, 0, 263, 265, 1, 0, 0, 0, 264, 258, 1, 0, 0, 0, 264, 265, 1, 0, 0, 0, 265, 266, 1, 0, 0, 0, 266, 267, 5, 37, 0, 0, 267, 67, 1, 0, 0, 0, 268, 274, 5, 34, 0, 0, 269, 270, 5, 92, 0, 0, 270, 273, 5, 34, 0, 0, 271, 273, 8, 3, 0, 0, 272, 269, 1, 0, 0, 0, 272, 271, 1, 0, 0, 0, 273, 276, 1, 0, 0, 0, 274, 272, 1, 0, 0, 0, 274, 275, 1, 0, 0, 0, 275, 277, 1, 0, 0, 0, 276, 274, 1, 0, 0, 0, 277, 278, 5, 34, 0, 0, 278, 69, 1, 0, 0, 0, 279, 281, 7, 4, 0, 0, 280, 279, 1, 0, 0, 0, 281, 282, 1, 0, 0, 0, 282, 280, 1, 0, 0, 0, 282, 283, 1, 0, 0, 0, 283, 287, 1, 0, 0, 0, 284, 286, 7, 5, 0, 0, 285, 284, 1, 0, 0, 0, 286, 289, 1, 0, 0, 0, 287, 285, 1, 0, 0, 0, 287, 288, 1, 0, 0, 0, 288, 71, 1, 0, 0, 0, 289, 287, 1, 0, 0, 0, 290, 292, 7, 2, 0, 0, 291, 290, 1, 0, 0, 0, 292, 293, 1, 0, 0, 0, 293, 291, 1, 0, 0, 0, 293, 294, 1, 0, 0, 0, 294, 303, 1, 0, 0, 0, 295, 297, 5, 95, 0, 0, 296, 298, 7, 2, 0, 0, 297, 296, 1, 0, 0, 0, 298, 299, 1, 0, 0, 0, 299, 297, 1, 0, 0, 0, 299, 300, 1, 0, 0, 0, 300, 302, 1, 0, 0, 0, 301, 295, 1, 0, 0, 0, 302, 305, 1, 0, 0, 0, 303, 301, 1, 0, 0, 0, 303, 304, 1, 0, 0, 0, 304, 73, 1, 0, 0, 0, 305, 303, 1, 0, 0, 0, 306, 310, 7, 6, 0, 0, 307, 309, 7, 7, 0, 0, 308, 307, 1, 0, 0, 0, 309, 312, 1, 0, 0, 0, 310, 308, 1, 0, 0, 0, 310, 311, 1, 0, 0, 0, 311, 319, 1, 0, 0, 0, 312, 310, 1, 0, 0, 0, 313, 315, 5, 47, 0, 0, 314, 316, 7, 2, 0, 0, 315, 314, 1, 0, 0, 0, 316, 317, 1, 0, 0, 0, 317, 315, 1, 0, 0, 0, 317, 318, 1, 0, 0, 0, 318, 320, 1, 0, 0, 0, 319, 313, 1, 0, 0, 0, 319, 320, 1, 0, 0, 0, 320, 75, 1, 0, 0, 0, 321, 322, 5, 64, 0, 0, 322, 323, 1, 0, 0, 0, 323, 324, 6, 37, 2, 0, 324, 77, 1, 0, 0, 0, 325, 326, 5, 58, 0, 0, 326, 327, 1, 0, 0, 0, 327, 328, 6, 38, 2, 0, 328, 79, 1, 0, 0, 0, 329, 331, 5, 36, 0, 0, 330, 332, 7, 5, 0, 0, 331, 330, 1, 0, 0, 0, 332, 333, 1, 0, 0, 0, 333, 331, 1, 0, 0, 0, 333, 334, 1, 0, 0, 0, 334, 338, 1, 0, 0, 0, 335, 337, 7, 8, 0, 0, 336, 335, 1, 0, 0, 0, 337, 340, 1, 0, 0, 0, 338, 336, 1, 0, 0, 0, 338, 339, 1, 0, 0, 0, 339, 81, 1, 0, 0, 0, 340, 338, 1, 0, 0, 0, 341, 343, 7, 9, 0, 0, 342, 341, 1, 0, 0, 0, 343, 344, 1, 0, 0, 0, 344, 342, 1, 0, 0, 0, 344, 345, 1, 0, 0, 0, 345, 346, 1, 0, 0, 0, 346, 347, 6, 40, 3, 0, 347, 83, 1, 0, 0, 0, 348, 349, 3, 80, 39, 0, 349, 350, 1, 0, 0, 0, 350, 351, 6, 41, 3, 0, 351, 85, 1, 0, 0, 0, 352, 353, 3, 80, 39, 0, 353, 87, 1, 0, 0, 0, 23, 0, 1, 91, 98, 105, 107, 121, 256, 262, 264, 272, 274, 282, 287, 293, 299, 303, 310, 317, 319, 333, 338, 344, 4, 6, 0, 0, 0, 1, 0, 5, 1, 0, 4, 0, 0]
\ No newline at end of file
diff --git a/internal/parser/antlrParser/Numscript.interp b/internal/parser/antlrParser/Numscript.interp
index 2d4b94b0..36f269a6 100644
--- a/internal/parser/antlrParser/Numscript.interp
+++ b/internal/parser/antlrParser/Numscript.interp
@@ -112,4 +112,4 @@ statement
 
 
 atn:
-[4, 1, 42, 267, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 3, 1, 48, 8, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 58, 8, 2, 10, 2, 12, 2, 61, 9, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 71, 8, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 79, 8, 2, 10, 2, 12, 2, 82, 9, 2, 1, 3, 1, 3, 1, 3, 5, 3, 87, 8, 3, 10, 3, 12, 3, 90, 9, 3, 1, 4, 1, 4, 1, 4, 3, 4, 95, 8, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 3, 6, 105, 8, 6, 1, 7, 1, 7, 1, 7, 5, 7, 110, 8, 7, 10, 7, 12, 7, 113, 9, 7, 1, 7, 1, 7, 1, 8, 3, 8, 118, 8, 8, 1, 8, 5, 8, 121, 8, 8, 10, 8, 12, 8, 124, 9, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 3, 10, 135, 8, 10, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 3, 12, 142, 8, 12, 1, 12, 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62, 71, 5, 36, 0, 0, 63, 71, 5, 33, 0, 0, 64, 71, 3, 0, 0, 0, 65, 66, 5, 20, 0, 0, 66, 67, 3, 4, 2, 0, 67, 68, 5, 21, 0, 0, 68, 71, 1, 0, 0, 0, 69, 71, 3, 8, 4, 0, 70, 49, 1, 0, 0, 0, 70, 51, 1, 0, 0, 0, 70, 52, 1, 0, 0, 0, 70, 53, 1, 0, 0, 0, 70, 62, 1, 0, 0, 0, 70, 63, 1, 0, 0, 0, 70, 64, 1, 0, 0, 0, 70, 65, 1, 0, 0, 0, 70, 69, 1, 0, 0, 0, 71, 80, 1, 0, 0, 0, 72, 73, 10, 4, 0, 0, 73, 74, 5, 31, 0, 0, 74, 79, 3, 4, 2, 5, 75, 76, 10, 3, 0, 0, 76, 77, 7, 0, 0, 0, 77, 79, 3, 4, 2, 4, 78, 72, 1, 0, 0, 0, 78, 75, 1, 0, 0, 0, 79, 82, 1, 0, 0, 0, 80, 78, 1, 0, 0, 0, 80, 81, 1, 0, 0, 0, 81, 5, 1, 0, 0, 0, 82, 80, 1, 0, 0, 0, 83, 88, 3, 4, 2, 0, 84, 85, 5, 26, 0, 0, 85, 87, 3, 4, 2, 0, 86, 84, 1, 0, 0, 0, 87, 90, 1, 0, 0, 0, 88, 86, 1, 0, 0, 0, 88, 89, 1, 0, 0, 0, 89, 7, 1, 0, 0, 0, 90, 88, 1, 0, 0, 0, 91, 92, 7, 1, 0, 0, 92, 94, 5, 20, 0, 0, 93, 95, 3, 6, 3, 0, 94, 93, 1, 0, 0, 0, 94, 95, 1, 0, 0, 0, 95, 96, 1, 0, 0, 0, 96, 97, 5, 21, 0, 0, 97, 9, 1, 0, 0, 0, 98, 99, 5, 27, 0, 0, 99, 100, 3, 4, 2, 0, 100, 11, 1, 0, 0, 0, 101, 102, 5, 35, 0, 0, 102, 104, 5, 42, 0, 0, 103, 105, 3, 10, 5, 0, 104, 103, 1, 0, 0, 0, 104, 105, 1, 0, 0, 0, 105, 13, 1, 0, 0, 0, 106, 107, 5, 5, 0, 0, 107, 111, 5, 24, 0, 0, 108, 110, 3, 12, 6, 0, 109, 108, 1, 0, 0, 0, 110, 113, 1, 0, 0, 0, 111, 109, 1, 0, 0, 0, 111, 112, 1, 0, 0, 0, 112, 114, 1, 0, 0, 0, 113, 111, 1, 0, 0, 0, 114, 115, 5, 25, 0, 0, 115, 15, 1, 0, 0, 0, 116, 118, 3, 14, 7, 0, 117, 116, 1, 0, 0, 0, 117, 118, 1, 0, 0, 0, 118, 122, 1, 0, 0, 0, 119, 121, 3, 38, 19, 0, 120, 119, 1, 0, 0, 0, 121, 124, 1, 0, 0, 0, 122, 120, 1, 0, 0, 0, 122, 123, 1, 0, 0, 0, 123, 125, 1, 0, 0, 0, 124, 122, 1, 0, 0, 0, 125, 126, 5, 0, 0, 1, 126, 17, 1, 0, 0, 0, 127, 128, 5, 22, 0, 0, 128, 129, 3, 4, 2, 0, 129, 130, 5, 28, 0, 0, 130, 131, 5, 23, 0, 0, 131, 19, 1, 0, 0, 0, 132, 135, 3, 4, 2, 0, 133, 135, 5, 13, 0, 0, 134, 132, 1, 0, 0, 0, 134, 133, 1, 0, 0, 0, 135, 21, 1, 0, 0, 0, 136, 137, 5, 32, 0, 0, 137, 138, 3, 4, 2, 0, 138, 23, 1, 0, 0, 0, 139, 141, 3, 4, 2, 0, 140, 142, 3, 22, 11, 0, 141, 140, 1, 0, 0, 0, 141, 142, 1, 0, 0, 0, 142, 143, 1, 0, 0, 0, 143, 144, 5, 14, 0, 0, 144, 145, 5, 15, 0, 0, 145, 146, 5, 16, 0, 0, 146, 192, 1, 0, 0, 0, 147, 149, 3, 4, 2, 0, 148, 150, 3, 22, 11, 0, 149, 148, 1, 0, 0, 0, 149, 150, 1, 0, 0, 0, 150, 151, 1, 0, 0, 0, 151, 152, 5, 14, 0, 0, 152, 153, 5, 16, 0, 0, 153, 154, 5, 11, 0, 0, 154, 155, 5, 12, 0, 0, 155, 156, 3, 4, 2, 0, 156, 192, 1, 0, 0, 0, 157, 159, 3, 4, 2, 0, 158, 160, 3, 22, 11, 0, 159, 158, 1, 0, 0, 0, 159, 160, 1, 0, 0, 0, 160, 192, 1, 0, 0, 0, 161, 163, 5, 24, 0, 0, 162, 164, 3, 26, 13, 0, 163, 162, 1, 0, 0, 0, 164, 165, 1, 0, 0, 0, 165, 163, 1, 0, 0, 0, 165, 166, 1, 0, 0, 0, 166, 167, 1, 0, 0, 0, 167, 168, 5, 25, 0, 0, 168, 192, 1, 0, 0, 0, 169, 173, 5, 24, 0, 0, 170, 172, 3, 24, 12, 0, 171, 170, 1, 0, 0, 0, 172, 175, 1, 0, 0, 0, 173, 171, 1, 0, 0, 0, 173, 174, 1, 0, 0, 0, 174, 176, 1, 0, 0, 0, 175, 173, 1, 0, 0, 0, 176, 192, 5, 25, 0, 0, 177, 178, 5, 17, 0, 0, 178, 180, 5, 24, 0, 0, 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0, 0, 215, 219, 5, 24, 0, 0, 216, 218, 3, 30, 15, 0, 217, 216, 1, 0, 0, 0, 218, 221, 1, 0, 0, 0, 219, 217, 1, 0, 0, 0, 219, 220, 1, 0, 0, 0, 220, 222, 1, 0, 0, 0, 221, 219, 1, 0, 0, 0, 222, 223, 5, 13, 0, 0, 223, 224, 3, 28, 14, 0, 224, 225, 5, 25, 0, 0, 225, 239, 1, 0, 0, 0, 226, 227, 5, 17, 0, 0, 227, 231, 5, 24, 0, 0, 228, 230, 3, 30, 15, 0, 229, 228, 1, 0, 0, 0, 230, 233, 1, 0, 0, 0, 231, 229, 1, 0, 0, 0, 231, 232, 1, 0, 0, 0, 232, 234, 1, 0, 0, 0, 233, 231, 1, 0, 0, 0, 234, 235, 5, 13, 0, 0, 235, 236, 3, 28, 14, 0, 236, 237, 5, 25, 0, 0, 237, 239, 1, 0, 0, 0, 238, 206, 1, 0, 0, 0, 238, 207, 1, 0, 0, 0, 238, 215, 1, 0, 0, 0, 238, 226, 1, 0, 0, 0, 239, 33, 1, 0, 0, 0, 240, 241, 3, 20, 10, 0, 241, 242, 3, 28, 14, 0, 242, 35, 1, 0, 0, 0, 243, 246, 3, 4, 2, 0, 244, 246, 3, 18, 9, 0, 245, 243, 1, 0, 0, 0, 245, 244, 1, 0, 0, 0, 246, 37, 1, 0, 0, 0, 247, 248, 5, 9, 0, 0, 248, 249, 3, 36, 18, 0, 249, 250, 5, 20, 0, 0, 250, 251, 5, 7, 0, 0, 251, 252, 5, 27, 0, 0, 252, 253, 3, 24, 12, 0, 253, 254, 5, 8, 0, 0, 254, 255, 5, 27, 0, 0, 255, 256, 3, 32, 16, 0, 256, 257, 5, 21, 0, 0, 257, 265, 1, 0, 0, 0, 258, 259, 5, 19, 0, 0, 259, 260, 3, 36, 18, 0, 260, 261, 5, 10, 0, 0, 261, 262, 3, 4, 2, 0, 262, 265, 1, 0, 0, 0, 263, 265, 3, 8, 4, 0, 264, 247, 1, 0, 0, 0, 264, 258, 1, 0, 0, 0, 264, 263, 1, 0, 0, 0, 265, 39, 1, 0, 0, 0, 26, 47, 59, 70, 78, 80, 88, 94, 104, 111, 117, 122, 134, 141, 149, 159, 165, 173, 182, 191, 200, 211, 219, 231, 238, 245, 264]
\ No newline at end of file
+[4, 1, 42, 269, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 3, 1, 48, 8, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 58, 8, 2, 10, 2, 12, 2, 61, 9, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 73, 8, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 81, 8, 2, 10, 2, 12, 2, 84, 9, 2, 1, 3, 1, 3, 1, 3, 5, 3, 89, 8, 3, 10, 3, 12, 3, 92, 9, 3, 1, 4, 1, 4, 1, 4, 3, 4, 97, 8, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 3, 6, 107, 8, 6, 1, 7, 1, 7, 1, 7, 5, 7, 112, 8, 7, 10, 7, 12, 7, 115, 9, 7, 1, 7, 1, 7, 1, 8, 3, 8, 120, 8, 8, 1, 8, 5, 8, 123, 8, 8, 10, 8, 12, 8, 126, 9, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 3, 10, 137, 8, 10, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 3, 12, 144, 8, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 152, 8, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 162, 8, 12, 1, 12, 1, 12, 4, 12, 166, 8, 12, 11, 12, 12, 12, 167, 1, 12, 1, 12, 1, 12, 1, 12, 5, 12, 174, 8, 12, 10, 12, 12, 12, 177, 9, 12, 1, 12, 1, 12, 1, 12, 1, 12, 4, 12, 183, 8, 12, 11, 12, 12, 12, 184, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 194, 8, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 3, 14, 203, 8, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 4, 16, 212, 8, 16, 11, 16, 12, 16, 213, 1, 16, 1, 16, 1, 16, 1, 16, 5, 16, 220, 8, 16, 10, 16, 12, 16, 223, 9, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 5, 16, 232, 8, 16, 10, 16, 12, 16, 235, 9, 16, 1, 16, 1, 16, 1, 16, 1, 16, 3, 16, 241, 8, 16, 1, 17, 1, 17, 1, 17, 1, 18, 1, 18, 3, 18, 248, 8, 18, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 3, 19, 267, 8, 19, 1, 19, 0, 1, 4, 20, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 0, 2, 1, 0, 29, 30, 2, 0, 16, 16, 35, 35, 290, 0, 40, 1, 0, 0, 0, 2, 47, 1, 0, 0, 0, 4, 72, 1, 0, 0, 0, 6, 85, 1, 0, 0, 0, 8, 93, 1, 0, 0, 0, 10, 100, 1, 0, 0, 0, 12, 103, 1, 0, 0, 0, 14, 108, 1, 0, 0, 0, 16, 119, 1, 0, 0, 0, 18, 129, 1, 0, 0, 0, 20, 136, 1, 0, 0, 0, 22, 138, 1, 0, 0, 0, 24, 193, 1, 0, 0, 0, 26, 195, 1, 0, 0, 0, 28, 202, 1, 0, 0, 0, 30, 204, 1, 0, 0, 0, 32, 240, 1, 0, 0, 0, 34, 242, 1, 0, 0, 0, 36, 247, 1, 0, 0, 0, 38, 266, 1, 0, 0, 0, 40, 41, 5, 22, 0, 0, 41, 42, 3, 4, 2, 0, 42, 43, 3, 4, 2, 0, 43, 44, 5, 23, 0, 0, 44, 1, 1, 0, 0, 0, 45, 48, 5, 40, 0, 0, 46, 48, 5, 41, 0, 0, 47, 45, 1, 0, 0, 0, 47, 46, 1, 0, 0, 0, 48, 3, 1, 0, 0, 0, 49, 50, 6, 2, -1, 0, 50, 73, 5, 42, 0, 0, 51, 73, 5, 37, 0, 0, 52, 73, 5, 34, 0, 0, 53, 54, 5, 38, 0, 0, 54, 59, 3, 2, 1, 0, 55, 56, 5, 39, 0, 0, 56, 58, 3, 2, 1, 0, 57, 55, 1, 0, 0, 0, 58, 61, 1, 0, 0, 0, 59, 57, 1, 0, 0, 0, 59, 60, 1, 0, 0, 0, 60, 73, 1, 0, 0, 0, 61, 59, 1, 0, 0, 0, 62, 73, 5, 36, 0, 0, 63, 73, 5, 33, 0, 0, 64, 73, 3, 0, 0, 0, 65, 66, 5, 30, 0, 0, 66, 73, 3, 4, 2, 5, 67, 68, 5, 20, 0, 0, 68, 69, 3, 4, 2, 0, 69, 70, 5, 21, 0, 0, 70, 73, 1, 0, 0, 0, 71, 73, 3, 8, 4, 0, 72, 49, 1, 0, 0, 0, 72, 51, 1, 0, 0, 0, 72, 52, 1, 0, 0, 0, 72, 53, 1, 0, 0, 0, 72, 62, 1, 0, 0, 0, 72, 63, 1, 0, 0, 0, 72, 64, 1, 0, 0, 0, 72, 65, 1, 0, 0, 0, 72, 67, 1, 0, 0, 0, 72, 71, 1, 0, 0, 0, 73, 82, 1, 0, 0, 0, 74, 75, 10, 4, 0, 0, 75, 76, 5, 31, 0, 0, 76, 81, 3, 4, 2, 5, 77, 78, 10, 3, 0, 0, 78, 79, 7, 0, 0, 0, 79, 81, 3, 4, 2, 4, 80, 74, 1, 0, 0, 0, 80, 77, 1, 0, 0, 0, 81, 84, 1, 0, 0, 0, 82, 80, 1, 0, 0, 0, 82, 83, 1, 0, 0, 0, 83, 5, 1, 0, 0, 0, 84, 82, 1, 0, 0, 0, 85, 90, 3, 4, 2, 0, 86, 87, 5, 26, 0, 0, 87, 89, 3, 4, 2, 0, 88, 86, 1, 0, 0, 0, 89, 92, 1, 0, 0, 0, 90, 88, 1, 0, 0, 0, 90, 91, 1, 0, 0, 0, 91, 7, 1, 0, 0, 0, 92, 90, 1, 0, 0, 0, 93, 94, 7, 1, 0, 0, 94, 96, 5, 20, 0, 0, 95, 97, 3, 6, 3, 0, 96, 95, 1, 0, 0, 0, 96, 97, 1, 0, 0, 0, 97, 98, 1, 0, 0, 0, 98, 99, 5, 21, 0, 0, 99, 9, 1, 0, 0, 0, 100, 101, 5, 27, 0, 0, 101, 102, 3, 4, 2, 0, 102, 11, 1, 0, 0, 0, 103, 104, 5, 35, 0, 0, 104, 106, 5, 42, 0, 0, 105, 107, 3, 10, 5, 0, 106, 105, 1, 0, 0, 0, 106, 107, 1, 0, 0, 0, 107, 13, 1, 0, 0, 0, 108, 109, 5, 5, 0, 0, 109, 113, 5, 24, 0, 0, 110, 112, 3, 12, 6, 0, 111, 110, 1, 0, 0, 0, 112, 115, 1, 0, 0, 0, 113, 111, 1, 0, 0, 0, 113, 114, 1, 0, 0, 0, 114, 116, 1, 0, 0, 0, 115, 113, 1, 0, 0, 0, 116, 117, 5, 25, 0, 0, 117, 15, 1, 0, 0, 0, 118, 120, 3, 14, 7, 0, 119, 118, 1, 0, 0, 0, 119, 120, 1, 0, 0, 0, 120, 124, 1, 0, 0, 0, 121, 123, 3, 38, 19, 0, 122, 121, 1, 0, 0, 0, 123, 126, 1, 0, 0, 0, 124, 122, 1, 0, 0, 0, 124, 125, 1, 0, 0, 0, 125, 127, 1, 0, 0, 0, 126, 124, 1, 0, 0, 0, 127, 128, 5, 0, 0, 1, 128, 17, 1, 0, 0, 0, 129, 130, 5, 22, 0, 0, 130, 131, 3, 4, 2, 0, 131, 132, 5, 28, 0, 0, 132, 133, 5, 23, 0, 0, 133, 19, 1, 0, 0, 0, 134, 137, 3, 4, 2, 0, 135, 137, 5, 13, 0, 0, 136, 134, 1, 0, 0, 0, 136, 135, 1, 0, 0, 0, 137, 21, 1, 0, 0, 0, 138, 139, 5, 32, 0, 0, 139, 140, 3, 4, 2, 0, 140, 23, 1, 0, 0, 0, 141, 143, 3, 4, 2, 0, 142, 144, 3, 22, 11, 0, 143, 142, 1, 0, 0, 0, 143, 144, 1, 0, 0, 0, 144, 145, 1, 0, 0, 0, 145, 146, 5, 14, 0, 0, 146, 147, 5, 15, 0, 0, 147, 148, 5, 16, 0, 0, 148, 194, 1, 0, 0, 0, 149, 151, 3, 4, 2, 0, 150, 152, 3, 22, 11, 0, 151, 150, 1, 0, 0, 0, 151, 152, 1, 0, 0, 0, 152, 153, 1, 0, 0, 0, 153, 154, 5, 14, 0, 0, 154, 155, 5, 16, 0, 0, 155, 156, 5, 11, 0, 0, 156, 157, 5, 12, 0, 0, 157, 158, 3, 4, 2, 0, 158, 194, 1, 0, 0, 0, 159, 161, 3, 4, 2, 0, 160, 162, 3, 22, 11, 0, 161, 160, 1, 0, 0, 0, 161, 162, 1, 0, 0, 0, 162, 194, 1, 0, 0, 0, 163, 165, 5, 24, 0, 0, 164, 166, 3, 26, 13, 0, 165, 164, 1, 0, 0, 0, 166, 167, 1, 0, 0, 0, 167, 165, 1, 0, 0, 0, 167, 168, 1, 0, 0, 0, 168, 169, 1, 0, 0, 0, 169, 170, 5, 25, 0, 0, 170, 194, 1, 0, 0, 0, 171, 175, 5, 24, 0, 0, 172, 174, 3, 24, 12, 0, 173, 172, 1, 0, 0, 0, 174, 177, 1, 0, 0, 0, 175, 173, 1, 0, 0, 0, 175, 176, 1, 0, 0, 0, 176, 178, 1, 0, 0, 0, 177, 175, 1, 0, 0, 0, 178, 194, 5, 25, 0, 0, 179, 180, 5, 17, 0, 0, 180, 182, 5, 24, 0, 0, 181, 183, 3, 24, 12, 0, 182, 181, 1, 0, 0, 0, 183, 184, 1, 0, 0, 0, 184, 182, 1, 0, 0, 0, 184, 185, 1, 0, 0, 0, 185, 186, 1, 0, 0, 0, 186, 187, 5, 25, 0, 0, 187, 194, 1, 0, 0, 0, 188, 189, 5, 6, 0, 0, 189, 190, 3, 4, 2, 0, 190, 191, 5, 10, 0, 0, 191, 192, 3, 24, 12, 0, 192, 194, 1, 0, 0, 0, 193, 141, 1, 0, 0, 0, 193, 149, 1, 0, 0, 0, 193, 159, 1, 0, 0, 0, 193, 163, 1, 0, 0, 0, 193, 171, 1, 0, 0, 0, 193, 179, 1, 0, 0, 0, 193, 188, 1, 0, 0, 0, 194, 25, 1, 0, 0, 0, 195, 196, 3, 20, 10, 0, 196, 197, 5, 10, 0, 0, 197, 198, 3, 24, 12, 0, 198, 27, 1, 0, 0, 0, 199, 200, 5, 12, 0, 0, 200, 203, 3, 32, 16, 0, 201, 203, 5, 18, 0, 0, 202, 199, 1, 0, 0, 0, 202, 201, 1, 0, 0, 0, 203, 29, 1, 0, 0, 0, 204, 205, 5, 6, 0, 0, 205, 206, 3, 4, 2, 0, 206, 207, 3, 28, 14, 0, 207, 31, 1, 0, 0, 0, 208, 241, 3, 4, 2, 0, 209, 211, 5, 24, 0, 0, 210, 212, 3, 34, 17, 0, 211, 210, 1, 0, 0, 0, 212, 213, 1, 0, 0, 0, 213, 211, 1, 0, 0, 0, 213, 214, 1, 0, 0, 0, 214, 215, 1, 0, 0, 0, 215, 216, 5, 25, 0, 0, 216, 241, 1, 0, 0, 0, 217, 221, 5, 24, 0, 0, 218, 220, 3, 30, 15, 0, 219, 218, 1, 0, 0, 0, 220, 223, 1, 0, 0, 0, 221, 219, 1, 0, 0, 0, 221, 222, 1, 0, 0, 0, 222, 224, 1, 0, 0, 0, 223, 221, 1, 0, 0, 0, 224, 225, 5, 13, 0, 0, 225, 226, 3, 28, 14, 0, 226, 227, 5, 25, 0, 0, 227, 241, 1, 0, 0, 0, 228, 229, 5, 17, 0, 0, 229, 233, 5, 24, 0, 0, 230, 232, 3, 30, 15, 0, 231, 230, 1, 0, 0, 0, 232, 235, 1, 0, 0, 0, 233, 231, 1, 0, 0, 0, 233, 234, 1, 0, 0, 0, 234, 236, 1, 0, 0, 0, 235, 233, 1, 0, 0, 0, 236, 237, 5, 13, 0, 0, 237, 238, 3, 28, 14, 0, 238, 239, 5, 25, 0, 0, 239, 241, 1, 0, 0, 0, 240, 208, 1, 0, 0, 0, 240, 209, 1, 0, 0, 0, 240, 217, 1, 0, 0, 0, 240, 228, 1, 0, 0, 0, 241, 33, 1, 0, 0, 0, 242, 243, 3, 20, 10, 0, 243, 244, 3, 28, 14, 0, 244, 35, 1, 0, 0, 0, 245, 248, 3, 4, 2, 0, 246, 248, 3, 18, 9, 0, 247, 245, 1, 0, 0, 0, 247, 246, 1, 0, 0, 0, 248, 37, 1, 0, 0, 0, 249, 250, 5, 9, 0, 0, 250, 251, 3, 36, 18, 0, 251, 252, 5, 20, 0, 0, 252, 253, 5, 7, 0, 0, 253, 254, 5, 27, 0, 0, 254, 255, 3, 24, 12, 0, 255, 256, 5, 8, 0, 0, 256, 257, 5, 27, 0, 0, 257, 258, 3, 32, 16, 0, 258, 259, 5, 21, 0, 0, 259, 267, 1, 0, 0, 0, 260, 261, 5, 19, 0, 0, 261, 262, 3, 36, 18, 0, 262, 263, 5, 10, 0, 0, 263, 264, 3, 4, 2, 0, 264, 267, 1, 0, 0, 0, 265, 267, 3, 8, 4, 0, 266, 249, 1, 0, 0, 0, 266, 260, 1, 0, 0, 0, 266, 265, 1, 0, 0, 0, 267, 39, 1, 0, 0, 0, 26, 47, 59, 72, 80, 82, 90, 96, 106, 113, 119, 124, 136, 143, 151, 161, 167, 175, 184, 193, 202, 213, 221, 233, 240, 247, 266]
\ No newline at end of file
diff --git a/internal/parser/antlrParser/lexer.go b/internal/parser/antlrParser/lexer.go
index e1524f68..449fcd65 100644
--- a/internal/parser/antlrParser/lexer.go
+++ b/internal/parser/antlrParser/lexer.go
@@ -69,7 +69,7 @@ func lexerLexerInit() {
 	}
 	staticData.PredictionContextCache = antlr.NewPredictionContextCache()
 	staticData.serializedATN = []int32{
-		4, 0, 42, 357, 6, -1, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3,
+		4, 0, 42, 354, 6, -1, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3,
 		7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9,
 		7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7,
 		14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19,
@@ -97,139 +97,137 @@ func lexerLexerInit() {
 		12, 32, 262, 3, 32, 265, 8, 32, 1, 32, 1, 32, 1, 33, 1, 33, 1, 33, 1, 33,
 		5, 33, 273, 8, 33, 10, 33, 12, 33, 276, 9, 33, 1, 33, 1, 33, 1, 34, 4,
 		34, 281, 8, 34, 11, 34, 12, 34, 282, 1, 34, 5, 34, 286, 8, 34, 10, 34,
-		12, 34, 289, 9, 34, 1, 35, 3, 35, 292, 8, 35, 1, 35, 4, 35, 295, 8, 35,
-		11, 35, 12, 35, 296, 1, 35, 1, 35, 4, 35, 301, 8, 35, 11, 35, 12, 35, 302,
-		5, 35, 305, 8, 35, 10, 35, 12, 35, 308, 9, 35, 1, 36, 1, 36, 5, 36, 312,
-		8, 36, 10, 36, 12, 36, 315, 9, 36, 1, 36, 1, 36, 4, 36, 319, 8, 36, 11,
-		36, 12, 36, 320, 3, 36, 323, 8, 36, 1, 37, 1, 37, 1, 37, 1, 37, 1, 38,
-		1, 38, 1, 38, 1, 38, 1, 39, 1, 39, 4, 39, 335, 8, 39, 11, 39, 12, 39, 336,
-		1, 39, 5, 39, 340, 8, 39, 10, 39, 12, 39, 343, 9, 39, 1, 40, 4, 40, 346,
-		8, 40, 11, 40, 12, 40, 347, 1, 40, 1, 40, 1, 41, 1, 41, 1, 41, 1, 41, 1,
-		42, 1, 42, 2, 107, 121, 0, 43, 2, 1, 4, 2, 6, 3, 8, 4, 10, 5, 12, 6, 14,
-		7, 16, 8, 18, 9, 20, 10, 22, 11, 24, 12, 26, 13, 28, 14, 30, 15, 32, 16,
-		34, 17, 36, 18, 38, 19, 40, 20, 42, 21, 44, 22, 46, 23, 48, 24, 50, 25,
-		52, 26, 54, 27, 56, 28, 58, 29, 60, 30, 62, 31, 64, 32, 66, 33, 68, 34,
-		70, 35, 72, 36, 74, 37, 76, 38, 78, 39, 80, 0, 82, 40, 84, 41, 86, 42,
-		2, 0, 1, 10, 3, 0, 9, 10, 13, 13, 32, 32, 2, 0, 10, 10, 13, 13, 1, 0, 48,
-		57, 3, 0, 10, 10, 13, 13, 34, 34, 1, 0, 97, 122, 2, 0, 95, 95, 97, 122,
-		1, 0, 65, 90, 2, 0, 48, 57, 65, 90, 3, 0, 48, 57, 95, 95, 97, 122, 5, 0,
-		45, 45, 48, 57, 65, 90, 95, 95, 97, 122, 376, 0, 2, 1, 0, 0, 0, 0, 4, 1,
-		0, 0, 0, 0, 6, 1, 0, 0, 0, 0, 8, 1, 0, 0, 0, 0, 10, 1, 0, 0, 0, 0, 12,
-		1, 0, 0, 0, 0, 14, 1, 0, 0, 0, 0, 16, 1, 0, 0, 0, 0, 18, 1, 0, 0, 0, 0,
-		20, 1, 0, 0, 0, 0, 22, 1, 0, 0, 0, 0, 24, 1, 0, 0, 0, 0, 26, 1, 0, 0, 0,
-		0, 28, 1, 0, 0, 0, 0, 30, 1, 0, 0, 0, 0, 32, 1, 0, 0, 0, 0, 34, 1, 0, 0,
-		0, 0, 36, 1, 0, 0, 0, 0, 38, 1, 0, 0, 0, 0, 40, 1, 0, 0, 0, 0, 42, 1, 0,
-		0, 0, 0, 44, 1, 0, 0, 0, 0, 46, 1, 0, 0, 0, 0, 48, 1, 0, 0, 0, 0, 50, 1,
-		0, 0, 0, 0, 52, 1, 0, 0, 0, 0, 54, 1, 0, 0, 0, 0, 56, 1, 0, 0, 0, 0, 58,
-		1, 0, 0, 0, 0, 60, 1, 0, 0, 0, 0, 62, 1, 0, 0, 0, 0, 64, 1, 0, 0, 0, 0,
-		66, 1, 0, 0, 0, 0, 68, 1, 0, 0, 0, 0, 70, 1, 0, 0, 0, 0, 72, 1, 0, 0, 0,
-		0, 74, 1, 0, 0, 0, 0, 76, 1, 0, 0, 0, 0, 78, 1, 0, 0, 0, 0, 86, 1, 0, 0,
-		0, 1, 82, 1, 0, 0, 0, 1, 84, 1, 0, 0, 0, 2, 89, 1, 0, 0, 0, 4, 96, 1, 0,
-		0, 0, 6, 100, 1, 0, 0, 0, 8, 115, 1, 0, 0, 0, 10, 128, 1, 0, 0, 0, 12,
-		133, 1, 0, 0, 0, 14, 137, 1, 0, 0, 0, 16, 144, 1, 0, 0, 0, 18, 156, 1,
-		0, 0, 0, 20, 161, 1, 0, 0, 0, 22, 166, 1, 0, 0, 0, 24, 169, 1, 0, 0, 0,
-		26, 172, 1, 0, 0, 0, 28, 182, 1, 0, 0, 0, 30, 191, 1, 0, 0, 0, 32, 201,
-		1, 0, 0, 0, 34, 211, 1, 0, 0, 0, 36, 217, 1, 0, 0, 0, 38, 222, 1, 0, 0,
-		0, 40, 227, 1, 0, 0, 0, 42, 229, 1, 0, 0, 0, 44, 231, 1, 0, 0, 0, 46, 233,
-		1, 0, 0, 0, 48, 235, 1, 0, 0, 0, 50, 237, 1, 0, 0, 0, 52, 239, 1, 0, 0,
-		0, 54, 241, 1, 0, 0, 0, 56, 243, 1, 0, 0, 0, 58, 245, 1, 0, 0, 0, 60, 247,
-		1, 0, 0, 0, 62, 249, 1, 0, 0, 0, 64, 251, 1, 0, 0, 0, 66, 254, 1, 0, 0,
-		0, 68, 268, 1, 0, 0, 0, 70, 280, 1, 0, 0, 0, 72, 291, 1, 0, 0, 0, 74, 309,
-		1, 0, 0, 0, 76, 324, 1, 0, 0, 0, 78, 328, 1, 0, 0, 0, 80, 332, 1, 0, 0,
-		0, 82, 345, 1, 0, 0, 0, 84, 351, 1, 0, 0, 0, 86, 355, 1, 0, 0, 0, 88, 90,
-		7, 0, 0, 0, 89, 88, 1, 0, 0, 0, 90, 91, 1, 0, 0, 0, 91, 89, 1, 0, 0, 0,
-		91, 92, 1, 0, 0, 0, 92, 93, 1, 0, 0, 0, 93, 94, 6, 0, 0, 0, 94, 3, 1, 0,
-		0, 0, 95, 97, 7, 1, 0, 0, 96, 95, 1, 0, 0, 0, 97, 98, 1, 0, 0, 0, 98, 96,
-		1, 0, 0, 0, 98, 99, 1, 0, 0, 0, 99, 5, 1, 0, 0, 0, 100, 101, 5, 47, 0,
-		0, 101, 102, 5, 42, 0, 0, 102, 107, 1, 0, 0, 0, 103, 106, 3, 6, 2, 0, 104,
-		106, 9, 0, 0, 0, 105, 103, 1, 0, 0, 0, 105, 104, 1, 0, 0, 0, 106, 109,
-		1, 0, 0, 0, 107, 108, 1, 0, 0, 0, 107, 105, 1, 0, 0, 0, 108, 110, 1, 0,
-		0, 0, 109, 107, 1, 0, 0, 0, 110, 111, 5, 42, 0, 0, 111, 112, 5, 47, 0,
-		0, 112, 113, 1, 0, 0, 0, 113, 114, 6, 2, 0, 0, 114, 7, 1, 0, 0, 0, 115,
-		116, 5, 47, 0, 0, 116, 117, 5, 47, 0, 0, 117, 121, 1, 0, 0, 0, 118, 120,
-		9, 0, 0, 0, 119, 118, 1, 0, 0, 0, 120, 123, 1, 0, 0, 0, 121, 122, 1, 0,
-		0, 0, 121, 119, 1, 0, 0, 0, 122, 124, 1, 0, 0, 0, 123, 121, 1, 0, 0, 0,
-		124, 125, 3, 4, 1, 0, 125, 126, 1, 0, 0, 0, 126, 127, 6, 3, 1, 0, 127,
-		9, 1, 0, 0, 0, 128, 129, 5, 118, 0, 0, 129, 130, 5, 97, 0, 0, 130, 131,
-		5, 114, 0, 0, 131, 132, 5, 115, 0, 0, 132, 11, 1, 0, 0, 0, 133, 134, 5,
-		109, 0, 0, 134, 135, 5, 97, 0, 0, 135, 136, 5, 120, 0, 0, 136, 13, 1, 0,
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+		1, 0, 0, 0, 287, 285, 1, 0, 0, 0, 287, 288, 1, 0, 0, 0, 288, 71, 1, 0,
+		0, 0, 289, 287, 1, 0, 0, 0, 290, 292, 7, 2, 0, 0, 291, 290, 1, 0, 0, 0,
+		292, 293, 1, 0, 0, 0, 293, 291, 1, 0, 0, 0, 293, 294, 1, 0, 0, 0, 294,
+		303, 1, 0, 0, 0, 295, 297, 5, 95, 0, 0, 296, 298, 7, 2, 0, 0, 297, 296,
+		1, 0, 0, 0, 298, 299, 1, 0, 0, 0, 299, 297, 1, 0, 0, 0, 299, 300, 1, 0,
+		0, 0, 300, 302, 1, 0, 0, 0, 301, 295, 1, 0, 0, 0, 302, 305, 1, 0, 0, 0,
+		303, 301, 1, 0, 0, 0, 303, 304, 1, 0, 0, 0, 304, 73, 1, 0, 0, 0, 305, 303,
+		1, 0, 0, 0, 306, 310, 7, 6, 0, 0, 307, 309, 7, 7, 0, 0, 308, 307, 1, 0,
+		0, 0, 309, 312, 1, 0, 0, 0, 310, 308, 1, 0, 0, 0, 310, 311, 1, 0, 0, 0,
+		311, 319, 1, 0, 0, 0, 312, 310, 1, 0, 0, 0, 313, 315, 5, 47, 0, 0, 314,
+		316, 7, 2, 0, 0, 315, 314, 1, 0, 0, 0, 316, 317, 1, 0, 0, 0, 317, 315,
+		1, 0, 0, 0, 317, 318, 1, 0, 0, 0, 318, 320, 1, 0, 0, 0, 319, 313, 1, 0,
+		0, 0, 319, 320, 1, 0, 0, 0, 320, 75, 1, 0, 0, 0, 321, 322, 5, 64, 0, 0,
+		322, 323, 1, 0, 0, 0, 323, 324, 6, 37, 2, 0, 324, 77, 1, 0, 0, 0, 325,
+		326, 5, 58, 0, 0, 326, 327, 1, 0, 0, 0, 327, 328, 6, 38, 2, 0, 328, 79,
+		1, 0, 0, 0, 329, 331, 5, 36, 0, 0, 330, 332, 7, 5, 0, 0, 331, 330, 1, 0,
+		0, 0, 332, 333, 1, 0, 0, 0, 333, 331, 1, 0, 0, 0, 333, 334, 1, 0, 0, 0,
+		334, 338, 1, 0, 0, 0, 335, 337, 7, 8, 0, 0, 336, 335, 1, 0, 0, 0, 337,
+		340, 1, 0, 0, 0, 338, 336, 1, 0, 0, 0, 338, 339, 1, 0, 0, 0, 339, 81, 1,
+		0, 0, 0, 340, 338, 1, 0, 0, 0, 341, 343, 7, 9, 0, 0, 342, 341, 1, 0, 0,
+		0, 343, 344, 1, 0, 0, 0, 344, 342, 1, 0, 0, 0, 344, 345, 1, 0, 0, 0, 345,
+		346, 1, 0, 0, 0, 346, 347, 6, 40, 3, 0, 347, 83, 1, 0, 0, 0, 348, 349,
+		3, 80, 39, 0, 349, 350, 1, 0, 0, 0, 350, 351, 6, 41, 3, 0, 351, 85, 1,
+		0, 0, 0, 352, 353, 3, 80, 39, 0, 353, 87, 1, 0, 0, 0, 23, 0, 1, 91, 98,
+		105, 107, 121, 256, 262, 264, 272, 274, 282, 287, 293, 299, 303, 310, 317,
+		319, 333, 338, 344, 4, 6, 0, 0, 0, 1, 0, 5, 1, 0, 4, 0, 0,
 	}
 	deserializer := antlr.NewATNDeserializer(nil)
 	staticData.atn = deserializer.Deserialize(staticData.serializedATN)
diff --git a/internal/parser/antlrParser/numscript_base_listener.go b/internal/parser/antlrParser/numscript_base_listener.go
index e786e701..47339927 100644
--- a/internal/parser/antlrParser/numscript_base_listener.go
+++ b/internal/parser/antlrParser/numscript_base_listener.go
@@ -44,6 +44,12 @@ func (s *BaseNumscriptListener) EnterVariableExpr(ctx *VariableExprContext) {}
 // ExitVariableExpr is called when production variableExpr is exited.
 func (s *BaseNumscriptListener) ExitVariableExpr(ctx *VariableExprContext) {}
 
+// EnterPrefixExpr is called when production prefixExpr is entered.
+func (s *BaseNumscriptListener) EnterPrefixExpr(ctx *PrefixExprContext) {}
+
+// ExitPrefixExpr is called when production prefixExpr is exited.
+func (s *BaseNumscriptListener) ExitPrefixExpr(ctx *PrefixExprContext) {}
+
 // EnterInfixExpr is called when production infixExpr is entered.
 func (s *BaseNumscriptListener) EnterInfixExpr(ctx *InfixExprContext) {}
 
diff --git a/internal/parser/antlrParser/numscript_listener.go b/internal/parser/antlrParser/numscript_listener.go
index 2f7c5b67..36a1fc48 100644
--- a/internal/parser/antlrParser/numscript_listener.go
+++ b/internal/parser/antlrParser/numscript_listener.go
@@ -19,6 +19,9 @@ type NumscriptListener interface {
 	// EnterVariableExpr is called when entering the variableExpr production.
 	EnterVariableExpr(c *VariableExprContext)
 
+	// EnterPrefixExpr is called when entering the prefixExpr production.
+	EnterPrefixExpr(c *PrefixExprContext)
+
 	// EnterInfixExpr is called when entering the infixExpr production.
 	EnterInfixExpr(c *InfixExprContext)
 
@@ -151,6 +154,9 @@ type NumscriptListener interface {
 	// ExitVariableExpr is called when exiting the variableExpr production.
 	ExitVariableExpr(c *VariableExprContext)
 
+	// ExitPrefixExpr is called when exiting the prefixExpr production.
+	ExitPrefixExpr(c *PrefixExprContext)
+
 	// ExitInfixExpr is called when exiting the infixExpr production.
 	ExitInfixExpr(c *InfixExprContext)
 
diff --git a/internal/parser/antlrParser/numscript_parser.go b/internal/parser/antlrParser/numscript_parser.go
index 838b47a0..68477afd 100644
--- a/internal/parser/antlrParser/numscript_parser.go
+++ b/internal/parser/antlrParser/numscript_parser.go
@@ -56,123 +56,125 @@ func numscriptParserInit() {
 	}
 	staticData.PredictionContextCache = antlr.NewPredictionContextCache()
 	staticData.serializedATN = []int32{
-		4, 1, 42, 267, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7,
+		4, 1, 42, 269, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7,
 		4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7,
 		10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15,
 		2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 1, 0, 1, 0, 1,
 		0, 1, 0, 1, 0, 1, 1, 1, 1, 3, 1, 48, 8, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2,
 		1, 2, 1, 2, 1, 2, 5, 2, 58, 8, 2, 10, 2, 12, 2, 61, 9, 2, 1, 2, 1, 2, 1,
-		2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 71, 8, 2, 1, 2, 1, 2, 1, 2, 1, 2,
-		1, 2, 1, 2, 5, 2, 79, 8, 2, 10, 2, 12, 2, 82, 9, 2, 1, 3, 1, 3, 1, 3, 5,
-		3, 87, 8, 3, 10, 3, 12, 3, 90, 9, 3, 1, 4, 1, 4, 1, 4, 3, 4, 95, 8, 4,
-		1, 4, 1, 4, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 3, 6, 105, 8, 6, 1, 7,
-		1, 7, 1, 7, 5, 7, 110, 8, 7, 10, 7, 12, 7, 113, 9, 7, 1, 7, 1, 7, 1, 8,
-		3, 8, 118, 8, 8, 1, 8, 5, 8, 121, 8, 8, 10, 8, 12, 8, 124, 9, 8, 1, 8,
-		1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 3, 10, 135, 8, 10, 1,
-		11, 1, 11, 1, 11, 1, 12, 1, 12, 3, 12, 142, 8, 12, 1, 12, 1, 12, 1, 12,
-		1, 12, 1, 12, 1, 12, 3, 12, 150, 8, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1,
-		12, 1, 12, 1, 12, 1, 12, 3, 12, 160, 8, 12, 1, 12, 1, 12, 4, 12, 164, 8,
-		12, 11, 12, 12, 12, 165, 1, 12, 1, 12, 1, 12, 1, 12, 5, 12, 172, 8, 12,
-		10, 12, 12, 12, 175, 9, 12, 1, 12, 1, 12, 1, 12, 1, 12, 4, 12, 181, 8,
-		12, 11, 12, 12, 12, 182, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12,
-		3, 12, 192, 8, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 3,
-		14, 201, 8, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 4, 16,
-		210, 8, 16, 11, 16, 12, 16, 211, 1, 16, 1, 16, 1, 16, 1, 16, 5, 16, 218,
-		8, 16, 10, 16, 12, 16, 221, 9, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1,
-		16, 1, 16, 5, 16, 230, 8, 16, 10, 16, 12, 16, 233, 9, 16, 1, 16, 1, 16,
-		1, 16, 1, 16, 3, 16, 239, 8, 16, 1, 17, 1, 17, 1, 17, 1, 18, 1, 18, 3,
-		18, 246, 8, 18, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19,
-		1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 3, 19, 265,
-		8, 19, 1, 19, 0, 1, 4, 20, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24,
-		26, 28, 30, 32, 34, 36, 38, 0, 2, 1, 0, 29, 30, 2, 0, 16, 16, 35, 35, 287,
-		0, 40, 1, 0, 0, 0, 2, 47, 1, 0, 0, 0, 4, 70, 1, 0, 0, 0, 6, 83, 1, 0, 0,
-		0, 8, 91, 1, 0, 0, 0, 10, 98, 1, 0, 0, 0, 12, 101, 1, 0, 0, 0, 14, 106,
-		1, 0, 0, 0, 16, 117, 1, 0, 0, 0, 18, 127, 1, 0, 0, 0, 20, 134, 1, 0, 0,
-		0, 22, 136, 1, 0, 0, 0, 24, 191, 1, 0, 0, 0, 26, 193, 1, 0, 0, 0, 28, 200,
-		1, 0, 0, 0, 30, 202, 1, 0, 0, 0, 32, 238, 1, 0, 0, 0, 34, 240, 1, 0, 0,
-		0, 36, 245, 1, 0, 0, 0, 38, 264, 1, 0, 0, 0, 40, 41, 5, 22, 0, 0, 41, 42,
-		3, 4, 2, 0, 42, 43, 3, 4, 2, 0, 43, 44, 5, 23, 0, 0, 44, 1, 1, 0, 0, 0,
-		45, 48, 5, 40, 0, 0, 46, 48, 5, 41, 0, 0, 47, 45, 1, 0, 0, 0, 47, 46, 1,
-		0, 0, 0, 48, 3, 1, 0, 0, 0, 49, 50, 6, 2, -1, 0, 50, 71, 5, 42, 0, 0, 51,
-		71, 5, 37, 0, 0, 52, 71, 5, 34, 0, 0, 53, 54, 5, 38, 0, 0, 54, 59, 3, 2,
-		1, 0, 55, 56, 5, 39, 0, 0, 56, 58, 3, 2, 1, 0, 57, 55, 1, 0, 0, 0, 58,
-		61, 1, 0, 0, 0, 59, 57, 1, 0, 0, 0, 59, 60, 1, 0, 0, 0, 60, 71, 1, 0, 0,
-		0, 61, 59, 1, 0, 0, 0, 62, 71, 5, 36, 0, 0, 63, 71, 5, 33, 0, 0, 64, 71,
-		3, 0, 0, 0, 65, 66, 5, 20, 0, 0, 66, 67, 3, 4, 2, 0, 67, 68, 5, 21, 0,
-		0, 68, 71, 1, 0, 0, 0, 69, 71, 3, 8, 4, 0, 70, 49, 1, 0, 0, 0, 70, 51,
-		1, 0, 0, 0, 70, 52, 1, 0, 0, 0, 70, 53, 1, 0, 0, 0, 70, 62, 1, 0, 0, 0,
-		70, 63, 1, 0, 0, 0, 70, 64, 1, 0, 0, 0, 70, 65, 1, 0, 0, 0, 70, 69, 1,
-		0, 0, 0, 71, 80, 1, 0, 0, 0, 72, 73, 10, 4, 0, 0, 73, 74, 5, 31, 0, 0,
-		74, 79, 3, 4, 2, 5, 75, 76, 10, 3, 0, 0, 76, 77, 7, 0, 0, 0, 77, 79, 3,
-		4, 2, 4, 78, 72, 1, 0, 0, 0, 78, 75, 1, 0, 0, 0, 79, 82, 1, 0, 0, 0, 80,
-		78, 1, 0, 0, 0, 80, 81, 1, 0, 0, 0, 81, 5, 1, 0, 0, 0, 82, 80, 1, 0, 0,
-		0, 83, 88, 3, 4, 2, 0, 84, 85, 5, 26, 0, 0, 85, 87, 3, 4, 2, 0, 86, 84,
-		1, 0, 0, 0, 87, 90, 1, 0, 0, 0, 88, 86, 1, 0, 0, 0, 88, 89, 1, 0, 0, 0,
-		89, 7, 1, 0, 0, 0, 90, 88, 1, 0, 0, 0, 91, 92, 7, 1, 0, 0, 92, 94, 5, 20,
-		0, 0, 93, 95, 3, 6, 3, 0, 94, 93, 1, 0, 0, 0, 94, 95, 1, 0, 0, 0, 95, 96,
-		1, 0, 0, 0, 96, 97, 5, 21, 0, 0, 97, 9, 1, 0, 0, 0, 98, 99, 5, 27, 0, 0,
-		99, 100, 3, 4, 2, 0, 100, 11, 1, 0, 0, 0, 101, 102, 5, 35, 0, 0, 102, 104,
-		5, 42, 0, 0, 103, 105, 3, 10, 5, 0, 104, 103, 1, 0, 0, 0, 104, 105, 1,
-		0, 0, 0, 105, 13, 1, 0, 0, 0, 106, 107, 5, 5, 0, 0, 107, 111, 5, 24, 0,
-		0, 108, 110, 3, 12, 6, 0, 109, 108, 1, 0, 0, 0, 110, 113, 1, 0, 0, 0, 111,
-		109, 1, 0, 0, 0, 111, 112, 1, 0, 0, 0, 112, 114, 1, 0, 0, 0, 113, 111,
-		1, 0, 0, 0, 114, 115, 5, 25, 0, 0, 115, 15, 1, 0, 0, 0, 116, 118, 3, 14,
-		7, 0, 117, 116, 1, 0, 0, 0, 117, 118, 1, 0, 0, 0, 118, 122, 1, 0, 0, 0,
-		119, 121, 3, 38, 19, 0, 120, 119, 1, 0, 0, 0, 121, 124, 1, 0, 0, 0, 122,
-		120, 1, 0, 0, 0, 122, 123, 1, 0, 0, 0, 123, 125, 1, 0, 0, 0, 124, 122,
-		1, 0, 0, 0, 125, 126, 5, 0, 0, 1, 126, 17, 1, 0, 0, 0, 127, 128, 5, 22,
-		0, 0, 128, 129, 3, 4, 2, 0, 129, 130, 5, 28, 0, 0, 130, 131, 5, 23, 0,
-		0, 131, 19, 1, 0, 0, 0, 132, 135, 3, 4, 2, 0, 133, 135, 5, 13, 0, 0, 134,
-		132, 1, 0, 0, 0, 134, 133, 1, 0, 0, 0, 135, 21, 1, 0, 0, 0, 136, 137, 5,
-		32, 0, 0, 137, 138, 3, 4, 2, 0, 138, 23, 1, 0, 0, 0, 139, 141, 3, 4, 2,
-		0, 140, 142, 3, 22, 11, 0, 141, 140, 1, 0, 0, 0, 141, 142, 1, 0, 0, 0,
-		142, 143, 1, 0, 0, 0, 143, 144, 5, 14, 0, 0, 144, 145, 5, 15, 0, 0, 145,
-		146, 5, 16, 0, 0, 146, 192, 1, 0, 0, 0, 147, 149, 3, 4, 2, 0, 148, 150,
-		3, 22, 11, 0, 149, 148, 1, 0, 0, 0, 149, 150, 1, 0, 0, 0, 150, 151, 1,
-		0, 0, 0, 151, 152, 5, 14, 0, 0, 152, 153, 5, 16, 0, 0, 153, 154, 5, 11,
-		0, 0, 154, 155, 5, 12, 0, 0, 155, 156, 3, 4, 2, 0, 156, 192, 1, 0, 0, 0,
-		157, 159, 3, 4, 2, 0, 158, 160, 3, 22, 11, 0, 159, 158, 1, 0, 0, 0, 159,
-		160, 1, 0, 0, 0, 160, 192, 1, 0, 0, 0, 161, 163, 5, 24, 0, 0, 162, 164,
-		3, 26, 13, 0, 163, 162, 1, 0, 0, 0, 164, 165, 1, 0, 0, 0, 165, 163, 1,
-		0, 0, 0, 165, 166, 1, 0, 0, 0, 166, 167, 1, 0, 0, 0, 167, 168, 5, 25, 0,
-		0, 168, 192, 1, 0, 0, 0, 169, 173, 5, 24, 0, 0, 170, 172, 3, 24, 12, 0,
-		171, 170, 1, 0, 0, 0, 172, 175, 1, 0, 0, 0, 173, 171, 1, 0, 0, 0, 173,
-		174, 1, 0, 0, 0, 174, 176, 1, 0, 0, 0, 175, 173, 1, 0, 0, 0, 176, 192,
-		5, 25, 0, 0, 177, 178, 5, 17, 0, 0, 178, 180, 5, 24, 0, 0, 179, 181, 3,
-		24, 12, 0, 180, 179, 1, 0, 0, 0, 181, 182, 1, 0, 0, 0, 182, 180, 1, 0,
-		0, 0, 182, 183, 1, 0, 0, 0, 183, 184, 1, 0, 0, 0, 184, 185, 5, 25, 0, 0,
-		185, 192, 1, 0, 0, 0, 186, 187, 5, 6, 0, 0, 187, 188, 3, 4, 2, 0, 188,
-		189, 5, 10, 0, 0, 189, 190, 3, 24, 12, 0, 190, 192, 1, 0, 0, 0, 191, 139,
-		1, 0, 0, 0, 191, 147, 1, 0, 0, 0, 191, 157, 1, 0, 0, 0, 191, 161, 1, 0,
-		0, 0, 191, 169, 1, 0, 0, 0, 191, 177, 1, 0, 0, 0, 191, 186, 1, 0, 0, 0,
-		192, 25, 1, 0, 0, 0, 193, 194, 3, 20, 10, 0, 194, 195, 5, 10, 0, 0, 195,
-		196, 3, 24, 12, 0, 196, 27, 1, 0, 0, 0, 197, 198, 5, 12, 0, 0, 198, 201,
-		3, 32, 16, 0, 199, 201, 5, 18, 0, 0, 200, 197, 1, 0, 0, 0, 200, 199, 1,
-		0, 0, 0, 201, 29, 1, 0, 0, 0, 202, 203, 5, 6, 0, 0, 203, 204, 3, 4, 2,
-		0, 204, 205, 3, 28, 14, 0, 205, 31, 1, 0, 0, 0, 206, 239, 3, 4, 2, 0, 207,
-		209, 5, 24, 0, 0, 208, 210, 3, 34, 17, 0, 209, 208, 1, 0, 0, 0, 210, 211,
-		1, 0, 0, 0, 211, 209, 1, 0, 0, 0, 211, 212, 1, 0, 0, 0, 212, 213, 1, 0,
-		0, 0, 213, 214, 5, 25, 0, 0, 214, 239, 1, 0, 0, 0, 215, 219, 5, 24, 0,
-		0, 216, 218, 3, 30, 15, 0, 217, 216, 1, 0, 0, 0, 218, 221, 1, 0, 0, 0,
-		219, 217, 1, 0, 0, 0, 219, 220, 1, 0, 0, 0, 220, 222, 1, 0, 0, 0, 221,
-		219, 1, 0, 0, 0, 222, 223, 5, 13, 0, 0, 223, 224, 3, 28, 14, 0, 224, 225,
-		5, 25, 0, 0, 225, 239, 1, 0, 0, 0, 226, 227, 5, 17, 0, 0, 227, 231, 5,
-		24, 0, 0, 228, 230, 3, 30, 15, 0, 229, 228, 1, 0, 0, 0, 230, 233, 1, 0,
-		0, 0, 231, 229, 1, 0, 0, 0, 231, 232, 1, 0, 0, 0, 232, 234, 1, 0, 0, 0,
-		233, 231, 1, 0, 0, 0, 234, 235, 5, 13, 0, 0, 235, 236, 3, 28, 14, 0, 236,
-		237, 5, 25, 0, 0, 237, 239, 1, 0, 0, 0, 238, 206, 1, 0, 0, 0, 238, 207,
-		1, 0, 0, 0, 238, 215, 1, 0, 0, 0, 238, 226, 1, 0, 0, 0, 239, 33, 1, 0,
-		0, 0, 240, 241, 3, 20, 10, 0, 241, 242, 3, 28, 14, 0, 242, 35, 1, 0, 0,
-		0, 243, 246, 3, 4, 2, 0, 244, 246, 3, 18, 9, 0, 245, 243, 1, 0, 0, 0, 245,
-		244, 1, 0, 0, 0, 246, 37, 1, 0, 0, 0, 247, 248, 5, 9, 0, 0, 248, 249, 3,
-		36, 18, 0, 249, 250, 5, 20, 0, 0, 250, 251, 5, 7, 0, 0, 251, 252, 5, 27,
-		0, 0, 252, 253, 3, 24, 12, 0, 253, 254, 5, 8, 0, 0, 254, 255, 5, 27, 0,
-		0, 255, 256, 3, 32, 16, 0, 256, 257, 5, 21, 0, 0, 257, 265, 1, 0, 0, 0,
-		258, 259, 5, 19, 0, 0, 259, 260, 3, 36, 18, 0, 260, 261, 5, 10, 0, 0, 261,
-		262, 3, 4, 2, 0, 262, 265, 1, 0, 0, 0, 263, 265, 3, 8, 4, 0, 264, 247,
-		1, 0, 0, 0, 264, 258, 1, 0, 0, 0, 264, 263, 1, 0, 0, 0, 265, 39, 1, 0,
-		0, 0, 26, 47, 59, 70, 78, 80, 88, 94, 104, 111, 117, 122, 134, 141, 149,
-		159, 165, 173, 182, 191, 200, 211, 219, 231, 238, 245, 264,
+		2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 73, 8, 2, 1, 2, 1, 2,
+		1, 2, 1, 2, 1, 2, 1, 2, 5, 2, 81, 8, 2, 10, 2, 12, 2, 84, 9, 2, 1, 3, 1,
+		3, 1, 3, 5, 3, 89, 8, 3, 10, 3, 12, 3, 92, 9, 3, 1, 4, 1, 4, 1, 4, 3, 4,
+		97, 8, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 3, 6, 107, 8,
+		6, 1, 7, 1, 7, 1, 7, 5, 7, 112, 8, 7, 10, 7, 12, 7, 115, 9, 7, 1, 7, 1,
+		7, 1, 8, 3, 8, 120, 8, 8, 1, 8, 5, 8, 123, 8, 8, 10, 8, 12, 8, 126, 9,
+		8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 3, 10, 137,
+		8, 10, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 3, 12, 144, 8, 12, 1, 12, 1,
+		12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 152, 8, 12, 1, 12, 1, 12, 1, 12,
+		1, 12, 1, 12, 1, 12, 1, 12, 1, 12, 3, 12, 162, 8, 12, 1, 12, 1, 12, 4,
+		12, 166, 8, 12, 11, 12, 12, 12, 167, 1, 12, 1, 12, 1, 12, 1, 12, 5, 12,
+		174, 8, 12, 10, 12, 12, 12, 177, 9, 12, 1, 12, 1, 12, 1, 12, 1, 12, 4,
+		12, 183, 8, 12, 11, 12, 12, 12, 184, 1, 12, 1, 12, 1, 12, 1, 12, 1, 12,
+		1, 12, 1, 12, 3, 12, 194, 8, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1,
+		14, 1, 14, 3, 14, 203, 8, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16,
+		1, 16, 4, 16, 212, 8, 16, 11, 16, 12, 16, 213, 1, 16, 1, 16, 1, 16, 1,
+		16, 5, 16, 220, 8, 16, 10, 16, 12, 16, 223, 9, 16, 1, 16, 1, 16, 1, 16,
+		1, 16, 1, 16, 1, 16, 1, 16, 5, 16, 232, 8, 16, 10, 16, 12, 16, 235, 9,
+		16, 1, 16, 1, 16, 1, 16, 1, 16, 3, 16, 241, 8, 16, 1, 17, 1, 17, 1, 17,
+		1, 18, 1, 18, 3, 18, 248, 8, 18, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1,
+		19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19, 1, 19,
+		1, 19, 3, 19, 267, 8, 19, 1, 19, 0, 1, 4, 20, 0, 2, 4, 6, 8, 10, 12, 14,
+		16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 0, 2, 1, 0, 29, 30, 2,
+		0, 16, 16, 35, 35, 290, 0, 40, 1, 0, 0, 0, 2, 47, 1, 0, 0, 0, 4, 72, 1,
+		0, 0, 0, 6, 85, 1, 0, 0, 0, 8, 93, 1, 0, 0, 0, 10, 100, 1, 0, 0, 0, 12,
+		103, 1, 0, 0, 0, 14, 108, 1, 0, 0, 0, 16, 119, 1, 0, 0, 0, 18, 129, 1,
+		0, 0, 0, 20, 136, 1, 0, 0, 0, 22, 138, 1, 0, 0, 0, 24, 193, 1, 0, 0, 0,
+		26, 195, 1, 0, 0, 0, 28, 202, 1, 0, 0, 0, 30, 204, 1, 0, 0, 0, 32, 240,
+		1, 0, 0, 0, 34, 242, 1, 0, 0, 0, 36, 247, 1, 0, 0, 0, 38, 266, 1, 0, 0,
+		0, 40, 41, 5, 22, 0, 0, 41, 42, 3, 4, 2, 0, 42, 43, 3, 4, 2, 0, 43, 44,
+		5, 23, 0, 0, 44, 1, 1, 0, 0, 0, 45, 48, 5, 40, 0, 0, 46, 48, 5, 41, 0,
+		0, 47, 45, 1, 0, 0, 0, 47, 46, 1, 0, 0, 0, 48, 3, 1, 0, 0, 0, 49, 50, 6,
+		2, -1, 0, 50, 73, 5, 42, 0, 0, 51, 73, 5, 37, 0, 0, 52, 73, 5, 34, 0, 0,
+		53, 54, 5, 38, 0, 0, 54, 59, 3, 2, 1, 0, 55, 56, 5, 39, 0, 0, 56, 58, 3,
+		2, 1, 0, 57, 55, 1, 0, 0, 0, 58, 61, 1, 0, 0, 0, 59, 57, 1, 0, 0, 0, 59,
+		60, 1, 0, 0, 0, 60, 73, 1, 0, 0, 0, 61, 59, 1, 0, 0, 0, 62, 73, 5, 36,
+		0, 0, 63, 73, 5, 33, 0, 0, 64, 73, 3, 0, 0, 0, 65, 66, 5, 30, 0, 0, 66,
+		73, 3, 4, 2, 5, 67, 68, 5, 20, 0, 0, 68, 69, 3, 4, 2, 0, 69, 70, 5, 21,
+		0, 0, 70, 73, 1, 0, 0, 0, 71, 73, 3, 8, 4, 0, 72, 49, 1, 0, 0, 0, 72, 51,
+		1, 0, 0, 0, 72, 52, 1, 0, 0, 0, 72, 53, 1, 0, 0, 0, 72, 62, 1, 0, 0, 0,
+		72, 63, 1, 0, 0, 0, 72, 64, 1, 0, 0, 0, 72, 65, 1, 0, 0, 0, 72, 67, 1,
+		0, 0, 0, 72, 71, 1, 0, 0, 0, 73, 82, 1, 0, 0, 0, 74, 75, 10, 4, 0, 0, 75,
+		76, 5, 31, 0, 0, 76, 81, 3, 4, 2, 5, 77, 78, 10, 3, 0, 0, 78, 79, 7, 0,
+		0, 0, 79, 81, 3, 4, 2, 4, 80, 74, 1, 0, 0, 0, 80, 77, 1, 0, 0, 0, 81, 84,
+		1, 0, 0, 0, 82, 80, 1, 0, 0, 0, 82, 83, 1, 0, 0, 0, 83, 5, 1, 0, 0, 0,
+		84, 82, 1, 0, 0, 0, 85, 90, 3, 4, 2, 0, 86, 87, 5, 26, 0, 0, 87, 89, 3,
+		4, 2, 0, 88, 86, 1, 0, 0, 0, 89, 92, 1, 0, 0, 0, 90, 88, 1, 0, 0, 0, 90,
+		91, 1, 0, 0, 0, 91, 7, 1, 0, 0, 0, 92, 90, 1, 0, 0, 0, 93, 94, 7, 1, 0,
+		0, 94, 96, 5, 20, 0, 0, 95, 97, 3, 6, 3, 0, 96, 95, 1, 0, 0, 0, 96, 97,
+		1, 0, 0, 0, 97, 98, 1, 0, 0, 0, 98, 99, 5, 21, 0, 0, 99, 9, 1, 0, 0, 0,
+		100, 101, 5, 27, 0, 0, 101, 102, 3, 4, 2, 0, 102, 11, 1, 0, 0, 0, 103,
+		104, 5, 35, 0, 0, 104, 106, 5, 42, 0, 0, 105, 107, 3, 10, 5, 0, 106, 105,
+		1, 0, 0, 0, 106, 107, 1, 0, 0, 0, 107, 13, 1, 0, 0, 0, 108, 109, 5, 5,
+		0, 0, 109, 113, 5, 24, 0, 0, 110, 112, 3, 12, 6, 0, 111, 110, 1, 0, 0,
+		0, 112, 115, 1, 0, 0, 0, 113, 111, 1, 0, 0, 0, 113, 114, 1, 0, 0, 0, 114,
+		116, 1, 0, 0, 0, 115, 113, 1, 0, 0, 0, 116, 117, 5, 25, 0, 0, 117, 15,
+		1, 0, 0, 0, 118, 120, 3, 14, 7, 0, 119, 118, 1, 0, 0, 0, 119, 120, 1, 0,
+		0, 0, 120, 124, 1, 0, 0, 0, 121, 123, 3, 38, 19, 0, 122, 121, 1, 0, 0,
+		0, 123, 126, 1, 0, 0, 0, 124, 122, 1, 0, 0, 0, 124, 125, 1, 0, 0, 0, 125,
+		127, 1, 0, 0, 0, 126, 124, 1, 0, 0, 0, 127, 128, 5, 0, 0, 1, 128, 17, 1,
+		0, 0, 0, 129, 130, 5, 22, 0, 0, 130, 131, 3, 4, 2, 0, 131, 132, 5, 28,
+		0, 0, 132, 133, 5, 23, 0, 0, 133, 19, 1, 0, 0, 0, 134, 137, 3, 4, 2, 0,
+		135, 137, 5, 13, 0, 0, 136, 134, 1, 0, 0, 0, 136, 135, 1, 0, 0, 0, 137,
+		21, 1, 0, 0, 0, 138, 139, 5, 32, 0, 0, 139, 140, 3, 4, 2, 0, 140, 23, 1,
+		0, 0, 0, 141, 143, 3, 4, 2, 0, 142, 144, 3, 22, 11, 0, 143, 142, 1, 0,
+		0, 0, 143, 144, 1, 0, 0, 0, 144, 145, 1, 0, 0, 0, 145, 146, 5, 14, 0, 0,
+		146, 147, 5, 15, 0, 0, 147, 148, 5, 16, 0, 0, 148, 194, 1, 0, 0, 0, 149,
+		151, 3, 4, 2, 0, 150, 152, 3, 22, 11, 0, 151, 150, 1, 0, 0, 0, 151, 152,
+		1, 0, 0, 0, 152, 153, 1, 0, 0, 0, 153, 154, 5, 14, 0, 0, 154, 155, 5, 16,
+		0, 0, 155, 156, 5, 11, 0, 0, 156, 157, 5, 12, 0, 0, 157, 158, 3, 4, 2,
+		0, 158, 194, 1, 0, 0, 0, 159, 161, 3, 4, 2, 0, 160, 162, 3, 22, 11, 0,
+		161, 160, 1, 0, 0, 0, 161, 162, 1, 0, 0, 0, 162, 194, 1, 0, 0, 0, 163,
+		165, 5, 24, 0, 0, 164, 166, 3, 26, 13, 0, 165, 164, 1, 0, 0, 0, 166, 167,
+		1, 0, 0, 0, 167, 165, 1, 0, 0, 0, 167, 168, 1, 0, 0, 0, 168, 169, 1, 0,
+		0, 0, 169, 170, 5, 25, 0, 0, 170, 194, 1, 0, 0, 0, 171, 175, 5, 24, 0,
+		0, 172, 174, 3, 24, 12, 0, 173, 172, 1, 0, 0, 0, 174, 177, 1, 0, 0, 0,
+		175, 173, 1, 0, 0, 0, 175, 176, 1, 0, 0, 0, 176, 178, 1, 0, 0, 0, 177,
+		175, 1, 0, 0, 0, 178, 194, 5, 25, 0, 0, 179, 180, 5, 17, 0, 0, 180, 182,
+		5, 24, 0, 0, 181, 183, 3, 24, 12, 0, 182, 181, 1, 0, 0, 0, 183, 184, 1,
+		0, 0, 0, 184, 182, 1, 0, 0, 0, 184, 185, 1, 0, 0, 0, 185, 186, 1, 0, 0,
+		0, 186, 187, 5, 25, 0, 0, 187, 194, 1, 0, 0, 0, 188, 189, 5, 6, 0, 0, 189,
+		190, 3, 4, 2, 0, 190, 191, 5, 10, 0, 0, 191, 192, 3, 24, 12, 0, 192, 194,
+		1, 0, 0, 0, 193, 141, 1, 0, 0, 0, 193, 149, 1, 0, 0, 0, 193, 159, 1, 0,
+		0, 0, 193, 163, 1, 0, 0, 0, 193, 171, 1, 0, 0, 0, 193, 179, 1, 0, 0, 0,
+		193, 188, 1, 0, 0, 0, 194, 25, 1, 0, 0, 0, 195, 196, 3, 20, 10, 0, 196,
+		197, 5, 10, 0, 0, 197, 198, 3, 24, 12, 0, 198, 27, 1, 0, 0, 0, 199, 200,
+		5, 12, 0, 0, 200, 203, 3, 32, 16, 0, 201, 203, 5, 18, 0, 0, 202, 199, 1,
+		0, 0, 0, 202, 201, 1, 0, 0, 0, 203, 29, 1, 0, 0, 0, 204, 205, 5, 6, 0,
+		0, 205, 206, 3, 4, 2, 0, 206, 207, 3, 28, 14, 0, 207, 31, 1, 0, 0, 0, 208,
+		241, 3, 4, 2, 0, 209, 211, 5, 24, 0, 0, 210, 212, 3, 34, 17, 0, 211, 210,
+		1, 0, 0, 0, 212, 213, 1, 0, 0, 0, 213, 211, 1, 0, 0, 0, 213, 214, 1, 0,
+		0, 0, 214, 215, 1, 0, 0, 0, 215, 216, 5, 25, 0, 0, 216, 241, 1, 0, 0, 0,
+		217, 221, 5, 24, 0, 0, 218, 220, 3, 30, 15, 0, 219, 218, 1, 0, 0, 0, 220,
+		223, 1, 0, 0, 0, 221, 219, 1, 0, 0, 0, 221, 222, 1, 0, 0, 0, 222, 224,
+		1, 0, 0, 0, 223, 221, 1, 0, 0, 0, 224, 225, 5, 13, 0, 0, 225, 226, 3, 28,
+		14, 0, 226, 227, 5, 25, 0, 0, 227, 241, 1, 0, 0, 0, 228, 229, 5, 17, 0,
+		0, 229, 233, 5, 24, 0, 0, 230, 232, 3, 30, 15, 0, 231, 230, 1, 0, 0, 0,
+		232, 235, 1, 0, 0, 0, 233, 231, 1, 0, 0, 0, 233, 234, 1, 0, 0, 0, 234,
+		236, 1, 0, 0, 0, 235, 233, 1, 0, 0, 0, 236, 237, 5, 13, 0, 0, 237, 238,
+		3, 28, 14, 0, 238, 239, 5, 25, 0, 0, 239, 241, 1, 0, 0, 0, 240, 208, 1,
+		0, 0, 0, 240, 209, 1, 0, 0, 0, 240, 217, 1, 0, 0, 0, 240, 228, 1, 0, 0,
+		0, 241, 33, 1, 0, 0, 0, 242, 243, 3, 20, 10, 0, 243, 244, 3, 28, 14, 0,
+		244, 35, 1, 0, 0, 0, 245, 248, 3, 4, 2, 0, 246, 248, 3, 18, 9, 0, 247,
+		245, 1, 0, 0, 0, 247, 246, 1, 0, 0, 0, 248, 37, 1, 0, 0, 0, 249, 250, 5,
+		9, 0, 0, 250, 251, 3, 36, 18, 0, 251, 252, 5, 20, 0, 0, 252, 253, 5, 7,
+		0, 0, 253, 254, 5, 27, 0, 0, 254, 255, 3, 24, 12, 0, 255, 256, 5, 8, 0,
+		0, 256, 257, 5, 27, 0, 0, 257, 258, 3, 32, 16, 0, 258, 259, 5, 21, 0, 0,
+		259, 267, 1, 0, 0, 0, 260, 261, 5, 19, 0, 0, 261, 262, 3, 36, 18, 0, 262,
+		263, 5, 10, 0, 0, 263, 264, 3, 4, 2, 0, 264, 267, 1, 0, 0, 0, 265, 267,
+		3, 8, 4, 0, 266, 249, 1, 0, 0, 0, 266, 260, 1, 0, 0, 0, 266, 265, 1, 0,
+		0, 0, 267, 39, 1, 0, 0, 0, 26, 47, 59, 72, 80, 82, 90, 96, 106, 113, 119,
+		124, 136, 143, 151, 161, 167, 175, 184, 193, 202, 213, 221, 233, 240, 247,
+		266,
 	}
 	deserializer := antlr.NewATNDeserializer(nil)
 	staticData.atn = deserializer.Deserialize(staticData.serializedATN)
@@ -732,6 +734,61 @@ func (s *VariableExprContext) ExitRule(listener antlr.ParseTreeListener) {
 	}
 }
 
+type PrefixExprContext struct {
+	ValueExprContext
+	op antlr.Token
+}
+
+func NewPrefixExprContext(parser antlr.Parser, ctx antlr.ParserRuleContext) *PrefixExprContext {
+	var p = new(PrefixExprContext)
+
+	InitEmptyValueExprContext(&p.ValueExprContext)
+	p.parser = parser
+	p.CopyAll(ctx.(*ValueExprContext))
+
+	return p
+}
+
+func (s *PrefixExprContext) GetOp() antlr.Token { return s.op }
+
+func (s *PrefixExprContext) SetOp(v antlr.Token) { s.op = v }
+
+func (s *PrefixExprContext) GetRuleContext() antlr.RuleContext {
+	return s
+}
+
+func (s *PrefixExprContext) ValueExpr() IValueExprContext {
+	var t antlr.RuleContext
+	for _, ctx := range s.GetChildren() {
+		if _, ok := ctx.(IValueExprContext); ok {
+			t = ctx.(antlr.RuleContext)
+			break
+		}
+	}
+
+	if t == nil {
+		return nil
+	}
+
+	return t.(IValueExprContext)
+}
+
+func (s *PrefixExprContext) MINUS() antlr.TerminalNode {
+	return s.GetToken(NumscriptParserMINUS, 0)
+}
+
+func (s *PrefixExprContext) EnterRule(listener antlr.ParseTreeListener) {
+	if listenerT, ok := listener.(NumscriptListener); ok {
+		listenerT.EnterPrefixExpr(s)
+	}
+}
+
+func (s *PrefixExprContext) ExitRule(listener antlr.ParseTreeListener) {
+	if listenerT, ok := listener.(NumscriptListener); ok {
+		listenerT.ExitPrefixExpr(s)
+	}
+}
+
 type InfixExprContext struct {
 	ValueExprContext
 	left  IValueExprContext
@@ -1213,7 +1270,7 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 	var _alt int
 
 	p.EnterOuterAlt(localctx, 1)
-	p.SetState(70)
+	p.SetState(72)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -1347,12 +1404,32 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 			p.MonetaryLit()
 		}
 
+	case NumscriptParserMINUS:
+		localctx = NewPrefixExprContext(p, localctx)
+		p.SetParserRuleContext(localctx)
+		_prevctx = localctx
+		{
+			p.SetState(65)
+
+			var _m = p.Match(NumscriptParserMINUS)
+
+			localctx.(*PrefixExprContext).op = _m
+			if p.HasError() {
+				// Recognition error - abort rule
+				goto errorExit
+			}
+		}
+		{
+			p.SetState(66)
+			p.valueExpr(5)
+		}
+
 	case NumscriptParserLPARENS:
 		localctx = NewParenthesizedExprContext(p, localctx)
 		p.SetParserRuleContext(localctx)
 		_prevctx = localctx
 		{
-			p.SetState(65)
+			p.SetState(67)
 			p.Match(NumscriptParserLPARENS)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -1360,11 +1437,11 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 			}
 		}
 		{
-			p.SetState(66)
+			p.SetState(68)
 			p.valueExpr(0)
 		}
 		{
-			p.SetState(67)
+			p.SetState(69)
 			p.Match(NumscriptParserRPARENS)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -1377,7 +1454,7 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 		p.SetParserRuleContext(localctx)
 		_prevctx = localctx
 		{
-			p.SetState(69)
+			p.SetState(71)
 			p.FunctionCall()
 		}
 
@@ -1386,7 +1463,7 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 		goto errorExit
 	}
 	p.GetParserRuleContext().SetStop(p.GetTokenStream().LT(-1))
-	p.SetState(80)
+	p.SetState(82)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -1401,7 +1478,7 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 				p.TriggerExitRuleEvent()
 			}
 			_prevctx = localctx
-			p.SetState(78)
+			p.SetState(80)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -1413,14 +1490,14 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 				localctx.(*InfixExprContext).left = _prevctx
 
 				p.PushNewRecursionContext(localctx, _startState, NumscriptParserRULE_valueExpr)
-				p.SetState(72)
+				p.SetState(74)
 
 				if !(p.Precpred(p.GetParserRuleContext(), 4)) {
 					p.SetError(antlr.NewFailedPredicateException(p, "p.Precpred(p.GetParserRuleContext(), 4)", ""))
 					goto errorExit
 				}
 				{
-					p.SetState(73)
+					p.SetState(75)
 
 					var _m = p.Match(NumscriptParserDIV)
 
@@ -1431,7 +1508,7 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 					}
 				}
 				{
-					p.SetState(74)
+					p.SetState(76)
 
 					var _x = p.valueExpr(5)
 
@@ -1443,14 +1520,14 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 				localctx.(*InfixExprContext).left = _prevctx
 
 				p.PushNewRecursionContext(localctx, _startState, NumscriptParserRULE_valueExpr)
-				p.SetState(75)
+				p.SetState(77)
 
 				if !(p.Precpred(p.GetParserRuleContext(), 3)) {
 					p.SetError(antlr.NewFailedPredicateException(p, "p.Precpred(p.GetParserRuleContext(), 3)", ""))
 					goto errorExit
 				}
 				{
-					p.SetState(76)
+					p.SetState(78)
 
 					var _lt = p.GetTokenStream().LT(1)
 
@@ -1468,7 +1545,7 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 					}
 				}
 				{
-					p.SetState(77)
+					p.SetState(79)
 
 					var _x = p.valueExpr(4)
 
@@ -1480,7 +1557,7 @@ func (p *NumscriptParser) valueExpr(_p int) (localctx IValueExprContext) {
 			}
 
 		}
-		p.SetState(82)
+		p.SetState(84)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -1629,10 +1706,10 @@ func (p *NumscriptParser) FunctionCallArgs() (localctx IFunctionCallArgsContext)
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(83)
+		p.SetState(85)
 		p.valueExpr(0)
 	}
-	p.SetState(88)
+	p.SetState(90)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -1641,7 +1718,7 @@ func (p *NumscriptParser) FunctionCallArgs() (localctx IFunctionCallArgsContext)
 
 	for _la == NumscriptParserCOMMA {
 		{
-			p.SetState(84)
+			p.SetState(86)
 			p.Match(NumscriptParserCOMMA)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -1649,11 +1726,11 @@ func (p *NumscriptParser) FunctionCallArgs() (localctx IFunctionCallArgsContext)
 			}
 		}
 		{
-			p.SetState(85)
+			p.SetState(87)
 			p.valueExpr(0)
 		}
 
-		p.SetState(90)
+		p.SetState(92)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -1794,7 +1871,7 @@ func (p *NumscriptParser) FunctionCall() (localctx IFunctionCallContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(91)
+		p.SetState(93)
 
 		var _lt = p.GetTokenStream().LT(1)
 
@@ -1812,29 +1889,29 @@ func (p *NumscriptParser) FunctionCall() (localctx IFunctionCallContext) {
 		}
 	}
 	{
-		p.SetState(92)
+		p.SetState(94)
 		p.Match(NumscriptParserLPARENS)
 		if p.HasError() {
 			// Recognition error - abort rule
 			goto errorExit
 		}
 	}
-	p.SetState(94)
+	p.SetState(96)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
 	}
 	_la = p.GetTokenStream().LA(1)
 
-	if (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4939217698816) != 0 {
+	if (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4940291440640) != 0 {
 		{
-			p.SetState(93)
+			p.SetState(95)
 			p.FunctionCallArgs()
 		}
 
 	}
 	{
-		p.SetState(96)
+		p.SetState(98)
 		p.Match(NumscriptParserRPARENS)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -1947,7 +2024,7 @@ func (p *NumscriptParser) VarOrigin() (localctx IVarOriginContext) {
 	p.EnterRule(localctx, 10, NumscriptParserRULE_varOrigin)
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(98)
+		p.SetState(100)
 		p.Match(NumscriptParserEQ)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -1955,7 +2032,7 @@ func (p *NumscriptParser) VarOrigin() (localctx IVarOriginContext) {
 		}
 	}
 	{
-		p.SetState(99)
+		p.SetState(101)
 		p.valueExpr(0)
 	}
 
@@ -2093,7 +2170,7 @@ func (p *NumscriptParser) VarDeclaration() (localctx IVarDeclarationContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(101)
+		p.SetState(103)
 
 		var _m = p.Match(NumscriptParserIDENTIFIER)
 
@@ -2104,7 +2181,7 @@ func (p *NumscriptParser) VarDeclaration() (localctx IVarDeclarationContext) {
 		}
 	}
 	{
-		p.SetState(102)
+		p.SetState(104)
 
 		var _m = p.Match(NumscriptParserVARIABLE_NAME)
 
@@ -2114,7 +2191,7 @@ func (p *NumscriptParser) VarDeclaration() (localctx IVarDeclarationContext) {
 			goto errorExit
 		}
 	}
-	p.SetState(104)
+	p.SetState(106)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -2123,7 +2200,7 @@ func (p *NumscriptParser) VarDeclaration() (localctx IVarDeclarationContext) {
 
 	if _la == NumscriptParserEQ {
 		{
-			p.SetState(103)
+			p.SetState(105)
 			p.VarOrigin()
 		}
 
@@ -2272,7 +2349,7 @@ func (p *NumscriptParser) VarsDeclaration() (localctx IVarsDeclarationContext) {
 
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(106)
+		p.SetState(108)
 		p.Match(NumscriptParserVARS)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -2280,14 +2357,14 @@ func (p *NumscriptParser) VarsDeclaration() (localctx IVarsDeclarationContext) {
 		}
 	}
 	{
-		p.SetState(107)
+		p.SetState(109)
 		p.Match(NumscriptParserLBRACE)
 		if p.HasError() {
 			// Recognition error - abort rule
 			goto errorExit
 		}
 	}
-	p.SetState(111)
+	p.SetState(113)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -2296,11 +2373,11 @@ func (p *NumscriptParser) VarsDeclaration() (localctx IVarsDeclarationContext) {
 
 	for _la == NumscriptParserIDENTIFIER {
 		{
-			p.SetState(108)
+			p.SetState(110)
 			p.VarDeclaration()
 		}
 
-		p.SetState(113)
+		p.SetState(115)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -2308,7 +2385,7 @@ func (p *NumscriptParser) VarsDeclaration() (localctx IVarsDeclarationContext) {
 		_la = p.GetTokenStream().LA(1)
 	}
 	{
-		p.SetState(114)
+		p.SetState(116)
 		p.Match(NumscriptParserRBRACE)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -2465,7 +2542,7 @@ func (p *NumscriptParser) Program() (localctx IProgramContext) {
 	var _la int
 
 	p.EnterOuterAlt(localctx, 1)
-	p.SetState(117)
+	p.SetState(119)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -2474,12 +2551,12 @@ func (p *NumscriptParser) Program() (localctx IProgramContext) {
 
 	if _la == NumscriptParserVARS {
 		{
-			p.SetState(116)
+			p.SetState(118)
 			p.VarsDeclaration()
 		}
 
 	}
-	p.SetState(122)
+	p.SetState(124)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -2488,11 +2565,11 @@ func (p *NumscriptParser) Program() (localctx IProgramContext) {
 
 	for (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&34360328704) != 0 {
 		{
-			p.SetState(119)
+			p.SetState(121)
 			p.Statement()
 		}
 
-		p.SetState(124)
+		p.SetState(126)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -2500,7 +2577,7 @@ func (p *NumscriptParser) Program() (localctx IProgramContext) {
 		_la = p.GetTokenStream().LA(1)
 	}
 	{
-		p.SetState(125)
+		p.SetState(127)
 		p.Match(NumscriptParserEOF)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -2634,7 +2711,7 @@ func (p *NumscriptParser) SentAllLit() (localctx ISentAllLitContext) {
 	p.EnterRule(localctx, 18, NumscriptParserRULE_sentAllLit)
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(127)
+		p.SetState(129)
 		p.Match(NumscriptParserLBRACKET)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -2643,7 +2720,7 @@ func (p *NumscriptParser) SentAllLit() (localctx ISentAllLitContext) {
 	}
 
 	{
-		p.SetState(128)
+		p.SetState(130)
 
 		var _x = p.valueExpr(0)
 
@@ -2651,7 +2728,7 @@ func (p *NumscriptParser) SentAllLit() (localctx ISentAllLitContext) {
 	}
 
 	{
-		p.SetState(129)
+		p.SetState(131)
 		p.Match(NumscriptParserSTAR)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -2659,7 +2736,7 @@ func (p *NumscriptParser) SentAllLit() (localctx ISentAllLitContext) {
 		}
 	}
 	{
-		p.SetState(130)
+		p.SetState(132)
 		p.Match(NumscriptParserRBRACKET)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -2817,18 +2894,18 @@ func (s *PortionedAllotmentContext) ExitRule(listener antlr.ParseTreeListener) {
 func (p *NumscriptParser) Allotment() (localctx IAllotmentContext) {
 	localctx = NewAllotmentContext(p, p.GetParserRuleContext(), p.GetState())
 	p.EnterRule(localctx, 20, NumscriptParserRULE_allotment)
-	p.SetState(134)
+	p.SetState(136)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
 	}
 
 	switch p.GetTokenStream().LA(1) {
-	case NumscriptParserOVERDRAFT, NumscriptParserLPARENS, NumscriptParserLBRACKET, NumscriptParserPERCENTAGE_PORTION_LITERAL, NumscriptParserSTRING, NumscriptParserIDENTIFIER, NumscriptParserNUMBER, NumscriptParserASSET, NumscriptParserACCOUNT_START, NumscriptParserVARIABLE_NAME:
+	case NumscriptParserOVERDRAFT, NumscriptParserLPARENS, NumscriptParserLBRACKET, NumscriptParserMINUS, NumscriptParserPERCENTAGE_PORTION_LITERAL, NumscriptParserSTRING, NumscriptParserIDENTIFIER, NumscriptParserNUMBER, NumscriptParserASSET, NumscriptParserACCOUNT_START, NumscriptParserVARIABLE_NAME:
 		localctx = NewPortionedAllotmentContext(p, localctx)
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(132)
+			p.SetState(134)
 			p.valueExpr(0)
 		}
 
@@ -2836,7 +2913,7 @@ func (p *NumscriptParser) Allotment() (localctx IAllotmentContext) {
 		localctx = NewRemainingAllotmentContext(p, localctx)
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(133)
+			p.SetState(135)
 			p.Match(NumscriptParserREMAINING)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -2954,7 +3031,7 @@ func (p *NumscriptParser) ColorConstraint() (localctx IColorConstraintContext) {
 	p.EnterRule(localctx, 22, NumscriptParserRULE_colorConstraint)
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(136)
+		p.SetState(138)
 		p.Match(NumscriptParserRESTRICT)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -2962,7 +3039,7 @@ func (p *NumscriptParser) ColorConstraint() (localctx IColorConstraintContext) {
 		}
 	}
 	{
-		p.SetState(137)
+		p.SetState(139)
 		p.valueExpr(0)
 	}
 
@@ -3608,7 +3685,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 	p.EnterRule(localctx, 24, NumscriptParserRULE_source)
 	var _la int
 
-	p.SetState(191)
+	p.SetState(193)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -3619,13 +3696,13 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 		localctx = NewSrcAccountUnboundedOverdraftContext(p, localctx)
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(139)
+			p.SetState(141)
 
 			var _x = p.valueExpr(0)
 
 			localctx.(*SrcAccountUnboundedOverdraftContext).address = _x
 		}
-		p.SetState(141)
+		p.SetState(143)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -3634,13 +3711,13 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 
 		if _la == NumscriptParserRESTRICT {
 			{
-				p.SetState(140)
+				p.SetState(142)
 				p.ColorConstraint()
 			}
 
 		}
 		{
-			p.SetState(143)
+			p.SetState(145)
 			p.Match(NumscriptParserALLOWING)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3648,7 +3725,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(144)
+			p.SetState(146)
 			p.Match(NumscriptParserUNBOUNDED)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3656,7 +3733,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(145)
+			p.SetState(147)
 			p.Match(NumscriptParserOVERDRAFT)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3668,13 +3745,13 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 		localctx = NewSrcAccountBoundedOverdraftContext(p, localctx)
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(147)
+			p.SetState(149)
 
 			var _x = p.valueExpr(0)
 
 			localctx.(*SrcAccountBoundedOverdraftContext).address = _x
 		}
-		p.SetState(149)
+		p.SetState(151)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -3683,13 +3760,13 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 
 		if _la == NumscriptParserRESTRICT {
 			{
-				p.SetState(148)
+				p.SetState(150)
 				p.ColorConstraint()
 			}
 
 		}
 		{
-			p.SetState(151)
+			p.SetState(153)
 			p.Match(NumscriptParserALLOWING)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3697,7 +3774,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(152)
+			p.SetState(154)
 			p.Match(NumscriptParserOVERDRAFT)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3705,7 +3782,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(153)
+			p.SetState(155)
 			p.Match(NumscriptParserUP)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3713,7 +3790,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(154)
+			p.SetState(156)
 			p.Match(NumscriptParserTO)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3721,7 +3798,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(155)
+			p.SetState(157)
 
 			var _x = p.valueExpr(0)
 
@@ -3732,10 +3809,10 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 		localctx = NewSrcAccountContext(p, localctx)
 		p.EnterOuterAlt(localctx, 3)
 		{
-			p.SetState(157)
+			p.SetState(159)
 			p.valueExpr(0)
 		}
-		p.SetState(159)
+		p.SetState(161)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -3744,7 +3821,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 
 		if _la == NumscriptParserRESTRICT {
 			{
-				p.SetState(158)
+				p.SetState(160)
 				p.ColorConstraint()
 			}
 
@@ -3754,27 +3831,27 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 		localctx = NewSrcAllotmentContext(p, localctx)
 		p.EnterOuterAlt(localctx, 4)
 		{
-			p.SetState(161)
+			p.SetState(163)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(163)
+		p.SetState(165)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
 		}
 		_la = p.GetTokenStream().LA(1)
 
-		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4939217707008) != 0) {
+		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4940291448832) != 0) {
 			{
-				p.SetState(162)
+				p.SetState(164)
 				p.AllotmentClauseSrc()
 			}
 
-			p.SetState(165)
+			p.SetState(167)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -3782,7 +3859,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(167)
+			p.SetState(169)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3794,27 +3871,27 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 		localctx = NewSrcInorderContext(p, localctx)
 		p.EnterOuterAlt(localctx, 5)
 		{
-			p.SetState(169)
+			p.SetState(171)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(173)
+		p.SetState(175)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
 		}
 		_la = p.GetTokenStream().LA(1)
 
-		for (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4939234607168) != 0 {
+		for (int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4940308348992) != 0 {
 			{
-				p.SetState(170)
+				p.SetState(172)
 				p.Source()
 			}
 
-			p.SetState(175)
+			p.SetState(177)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -3822,7 +3899,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(176)
+			p.SetState(178)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3834,7 +3911,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 		localctx = NewSrcOneofContext(p, localctx)
 		p.EnterOuterAlt(localctx, 6)
 		{
-			p.SetState(177)
+			p.SetState(179)
 			p.Match(NumscriptParserONEOF)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3842,27 +3919,27 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(178)
+			p.SetState(180)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(180)
+		p.SetState(182)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
 		}
 		_la = p.GetTokenStream().LA(1)
 
-		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4939234607168) != 0) {
+		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4940308348992) != 0) {
 			{
-				p.SetState(179)
+				p.SetState(181)
 				p.Source()
 			}
 
-			p.SetState(182)
+			p.SetState(184)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -3870,7 +3947,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(184)
+			p.SetState(186)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3882,7 +3959,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 		localctx = NewSrcCappedContext(p, localctx)
 		p.EnterOuterAlt(localctx, 7)
 		{
-			p.SetState(186)
+			p.SetState(188)
 			p.Match(NumscriptParserMAX)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3890,14 +3967,14 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(187)
+			p.SetState(189)
 
 			var _x = p.valueExpr(0)
 
 			localctx.(*SrcCappedContext).cap_ = _x
 		}
 		{
-			p.SetState(188)
+			p.SetState(190)
 			p.Match(NumscriptParserFROM)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -3905,7 +3982,7 @@ func (p *NumscriptParser) Source() (localctx ISourceContext) {
 			}
 		}
 		{
-			p.SetState(189)
+			p.SetState(191)
 			p.Source()
 		}
 
@@ -4035,11 +4112,11 @@ func (p *NumscriptParser) AllotmentClauseSrc() (localctx IAllotmentClauseSrcCont
 	p.EnterRule(localctx, 26, NumscriptParserRULE_allotmentClauseSrc)
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(193)
+		p.SetState(195)
 		p.Allotment()
 	}
 	{
-		p.SetState(194)
+		p.SetState(196)
 		p.Match(NumscriptParserFROM)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -4047,7 +4124,7 @@ func (p *NumscriptParser) AllotmentClauseSrc() (localctx IAllotmentClauseSrcCont
 		}
 	}
 	{
-		p.SetState(195)
+		p.SetState(197)
 		p.Source()
 	}
 
@@ -4205,7 +4282,7 @@ func (s *DestinationToContext) ExitRule(listener antlr.ParseTreeListener) {
 func (p *NumscriptParser) KeptOrDestination() (localctx IKeptOrDestinationContext) {
 	localctx = NewKeptOrDestinationContext(p, p.GetParserRuleContext(), p.GetState())
 	p.EnterRule(localctx, 28, NumscriptParserRULE_keptOrDestination)
-	p.SetState(200)
+	p.SetState(202)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -4216,7 +4293,7 @@ func (p *NumscriptParser) KeptOrDestination() (localctx IKeptOrDestinationContex
 		localctx = NewDestinationToContext(p, localctx)
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(197)
+			p.SetState(199)
 			p.Match(NumscriptParserTO)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4224,7 +4301,7 @@ func (p *NumscriptParser) KeptOrDestination() (localctx IKeptOrDestinationContex
 			}
 		}
 		{
-			p.SetState(198)
+			p.SetState(200)
 			p.Destination()
 		}
 
@@ -4232,7 +4309,7 @@ func (p *NumscriptParser) KeptOrDestination() (localctx IKeptOrDestinationContex
 		localctx = NewDestinationKeptContext(p, localctx)
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(199)
+			p.SetState(201)
 			p.Match(NumscriptParserKEPT)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4367,7 +4444,7 @@ func (p *NumscriptParser) DestinationInOrderClause() (localctx IDestinationInOrd
 	p.EnterRule(localctx, 30, NumscriptParserRULE_destinationInOrderClause)
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(202)
+		p.SetState(204)
 		p.Match(NumscriptParserMAX)
 		if p.HasError() {
 			// Recognition error - abort rule
@@ -4375,11 +4452,11 @@ func (p *NumscriptParser) DestinationInOrderClause() (localctx IDestinationInOrd
 		}
 	}
 	{
-		p.SetState(203)
+		p.SetState(205)
 		p.valueExpr(0)
 	}
 	{
-		p.SetState(204)
+		p.SetState(206)
 		p.KeptOrDestination()
 	}
 
@@ -4782,7 +4859,7 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 	p.EnterRule(localctx, 32, NumscriptParserRULE_destination)
 	var _la int
 
-	p.SetState(238)
+	p.SetState(240)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -4793,7 +4870,7 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 		localctx = NewDestAccountContext(p, localctx)
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(206)
+			p.SetState(208)
 			p.valueExpr(0)
 		}
 
@@ -4801,27 +4878,27 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 		localctx = NewDestAllotmentContext(p, localctx)
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(207)
+			p.SetState(209)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(209)
+		p.SetState(211)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
 		}
 		_la = p.GetTokenStream().LA(1)
 
-		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4939217707008) != 0) {
+		for ok := true; ok; ok = ((int64(_la) & ^0x3f) == 0 && ((int64(1)<<_la)&4940291448832) != 0) {
 			{
-				p.SetState(208)
+				p.SetState(210)
 				p.AllotmentClauseDest()
 			}
 
-			p.SetState(211)
+			p.SetState(213)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -4829,7 +4906,7 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(213)
+			p.SetState(215)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4841,14 +4918,14 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 		localctx = NewDestInorderContext(p, localctx)
 		p.EnterOuterAlt(localctx, 3)
 		{
-			p.SetState(215)
+			p.SetState(217)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(219)
+		p.SetState(221)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -4857,11 +4934,11 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 
 		for _la == NumscriptParserMAX {
 			{
-				p.SetState(216)
+				p.SetState(218)
 				p.DestinationInOrderClause()
 			}
 
-			p.SetState(221)
+			p.SetState(223)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -4869,7 +4946,7 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(222)
+			p.SetState(224)
 			p.Match(NumscriptParserREMAINING)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4877,11 +4954,11 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			}
 		}
 		{
-			p.SetState(223)
+			p.SetState(225)
 			p.KeptOrDestination()
 		}
 		{
-			p.SetState(224)
+			p.SetState(226)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4893,7 +4970,7 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 		localctx = NewDestOneofContext(p, localctx)
 		p.EnterOuterAlt(localctx, 4)
 		{
-			p.SetState(226)
+			p.SetState(228)
 			p.Match(NumscriptParserONEOF)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4901,14 +4978,14 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			}
 		}
 		{
-			p.SetState(227)
+			p.SetState(229)
 			p.Match(NumscriptParserLBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
 				goto errorExit
 			}
 		}
-		p.SetState(231)
+		p.SetState(233)
 		p.GetErrorHandler().Sync(p)
 		if p.HasError() {
 			goto errorExit
@@ -4917,11 +4994,11 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 
 		for _la == NumscriptParserMAX {
 			{
-				p.SetState(228)
+				p.SetState(230)
 				p.DestinationInOrderClause()
 			}
 
-			p.SetState(233)
+			p.SetState(235)
 			p.GetErrorHandler().Sync(p)
 			if p.HasError() {
 				goto errorExit
@@ -4929,7 +5006,7 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			_la = p.GetTokenStream().LA(1)
 		}
 		{
-			p.SetState(234)
+			p.SetState(236)
 			p.Match(NumscriptParserREMAINING)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -4937,11 +5014,11 @@ func (p *NumscriptParser) Destination() (localctx IDestinationContext) {
 			}
 		}
 		{
-			p.SetState(235)
+			p.SetState(237)
 			p.KeptOrDestination()
 		}
 		{
-			p.SetState(236)
+			p.SetState(238)
 			p.Match(NumscriptParserRBRACE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5070,11 +5147,11 @@ func (p *NumscriptParser) AllotmentClauseDest() (localctx IAllotmentClauseDestCo
 	p.EnterRule(localctx, 34, NumscriptParserRULE_allotmentClauseDest)
 	p.EnterOuterAlt(localctx, 1)
 	{
-		p.SetState(240)
+		p.SetState(242)
 		p.Allotment()
 	}
 	{
-		p.SetState(241)
+		p.SetState(243)
 		p.KeptOrDestination()
 	}
 
@@ -5240,7 +5317,7 @@ func (s *SentLiteralContext) ExitRule(listener antlr.ParseTreeListener) {
 func (p *NumscriptParser) SentValue() (localctx ISentValueContext) {
 	localctx = NewSentValueContext(p, p.GetParserRuleContext(), p.GetState())
 	p.EnterRule(localctx, 36, NumscriptParserRULE_sentValue)
-	p.SetState(245)
+	p.SetState(247)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -5251,7 +5328,7 @@ func (p *NumscriptParser) SentValue() (localctx ISentValueContext) {
 		localctx = NewSentLiteralContext(p, localctx)
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(243)
+			p.SetState(245)
 			p.valueExpr(0)
 		}
 
@@ -5259,7 +5336,7 @@ func (p *NumscriptParser) SentValue() (localctx ISentValueContext) {
 		localctx = NewSentAllContext(p, localctx)
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(244)
+			p.SetState(246)
 			p.SentAllLit()
 		}
 
@@ -5559,7 +5636,7 @@ func (s *FnCallStatementContext) ExitRule(listener antlr.ParseTreeListener) {
 func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 	localctx = NewStatementContext(p, p.GetParserRuleContext(), p.GetState())
 	p.EnterRule(localctx, 38, NumscriptParserRULE_statement)
-	p.SetState(264)
+	p.SetState(266)
 	p.GetErrorHandler().Sync(p)
 	if p.HasError() {
 		goto errorExit
@@ -5570,7 +5647,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 		localctx = NewSendStatementContext(p, localctx)
 		p.EnterOuterAlt(localctx, 1)
 		{
-			p.SetState(247)
+			p.SetState(249)
 			p.Match(NumscriptParserSEND)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5578,11 +5655,11 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(248)
+			p.SetState(250)
 			p.SentValue()
 		}
 		{
-			p.SetState(249)
+			p.SetState(251)
 			p.Match(NumscriptParserLPARENS)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5590,7 +5667,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(250)
+			p.SetState(252)
 			p.Match(NumscriptParserSOURCE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5598,7 +5675,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(251)
+			p.SetState(253)
 			p.Match(NumscriptParserEQ)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5606,11 +5683,11 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(252)
+			p.SetState(254)
 			p.Source()
 		}
 		{
-			p.SetState(253)
+			p.SetState(255)
 			p.Match(NumscriptParserDESTINATION)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5618,7 +5695,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(254)
+			p.SetState(256)
 			p.Match(NumscriptParserEQ)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5626,11 +5703,11 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(255)
+			p.SetState(257)
 			p.Destination()
 		}
 		{
-			p.SetState(256)
+			p.SetState(258)
 			p.Match(NumscriptParserRPARENS)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5642,7 +5719,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 		localctx = NewSaveStatementContext(p, localctx)
 		p.EnterOuterAlt(localctx, 2)
 		{
-			p.SetState(258)
+			p.SetState(260)
 			p.Match(NumscriptParserSAVE)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5650,11 +5727,11 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(259)
+			p.SetState(261)
 			p.SentValue()
 		}
 		{
-			p.SetState(260)
+			p.SetState(262)
 			p.Match(NumscriptParserFROM)
 			if p.HasError() {
 				// Recognition error - abort rule
@@ -5662,7 +5739,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 			}
 		}
 		{
-			p.SetState(261)
+			p.SetState(263)
 			p.valueExpr(0)
 		}
 
@@ -5670,7 +5747,7 @@ func (p *NumscriptParser) Statement() (localctx IStatementContext) {
 		localctx = NewFnCallStatementContext(p, localctx)
 		p.EnterOuterAlt(localctx, 3)
 		{
-			p.SetState(263)
+			p.SetState(265)
 			p.FunctionCall()
 		}
 
diff --git a/internal/parser/ast.go b/internal/parser/ast.go
index 5dd4d776..8ce0911c 100644
--- a/internal/parser/ast.go
+++ b/internal/parser/ast.go
@@ -18,8 +18,15 @@ func (*PercentageLiteral) valueExpr()    {}
 func (*NumberLiteral) valueExpr()        {}
 func (*StringLiteral) valueExpr()        {}
 func (*BinaryInfix) valueExpr()          {}
+func (*Prefix) valueExpr()               {}
 func (*FnCall) valueExpr()               {}
 
+type PrefixOperator string
+
+const (
+	PrefixOperatorMinus PrefixOperator = "-"
+)
+
 type InfixOperator string
 
 const (
@@ -66,6 +73,12 @@ type (
 		Name string
 	}
 
+	Prefix struct {
+		Range
+		Operator PrefixOperator
+		Expr     ValueExpr
+	}
+
 	BinaryInfix struct {
 		Range
 		Operator InfixOperator
diff --git a/internal/parser/parser.go b/internal/parser/parser.go
index e997af82..0b165004 100644
--- a/internal/parser/parser.go
+++ b/internal/parser/parser.go
@@ -362,6 +362,13 @@ func parseValueExpr(valueExprCtx antlrParser.IValueExprContext) ValueExpr {
 	case *antlrParser.StringLiteralContext:
 		return parseStringLiteralCtx(valueExprCtx)
 
+	case *antlrParser.PrefixExprContext:
+		return &Prefix{
+			Range:    ctxToRange(valueExprCtx),
+			Operator: PrefixOperator(valueExprCtx.GetOp().GetText()),
+			Expr:     parseValueExpr(valueExprCtx.ValueExpr()),
+		}
+
 	case *antlrParser.InfixExprContext:
 		return &BinaryInfix{
 			Range:    ctxToRange(valueExprCtx),