feat(serialize): ✨Safe call serialize withou parent

Author: vivaxy

lib/serialize.js

@@ -36,13 +36,14 @@ const serializeTypes = {
       ' ' +
       serialize(ast.right, ast);
     if (
-      parent.type === astTypes.UNARY_EXPRESSION ||
-      (parent.type === astTypes.BINARY_EXPRESSION &&
-        (binaryOperatorPrecedences[parent.operator] >
-          binaryOperatorPrecedences[ast.operator] ||
-          (binaryOperatorPrecedences[parent.operator] ===
-            binaryOperatorPrecedences[ast.operator] &&
-            ast === parent.right)))
+      parent &&
+      (parent.type === astTypes.UNARY_EXPRESSION ||
+        (parent.type === astTypes.BINARY_EXPRESSION &&
+          (binaryOperatorPrecedences[parent.operator] >
+            binaryOperatorPrecedences[ast.operator] ||
+            (binaryOperatorPrecedences[parent.operator] ===
+              binaryOperatorPrecedences[ast.operator] &&
+              ast === parent.right))))
     ) {
       return addParen(serialized);
     }
@@ -70,9 +71,10 @@ const serializeTypes = {
       ' ' +
       serialize(ast.right, ast);
     if (
-      parent.type === astTypes.UNARY_EXPRESSION ||
-      parent.type === astTypes.BINARY_EXPRESSION ||
-      (parent.type === astTypes.LOGICAL_EXPRESSION && ast.operator === '||')
+      parent &&
+      (parent.type === astTypes.UNARY_EXPRESSION ||
+        parent.type === astTypes.BINARY_EXPRESSION ||
+        (parent.type === astTypes.LOGICAL_EXPRESSION && ast.operator === '||'))
     ) {
       return addParen(serialized);
     }
@@ -93,9 +95,10 @@ const serializeTypes = {
       ' : ' +
       serialize(ast.alternate, ast);
     if (
-      parent.type === astTypes.UNARY_EXPRESSION ||
-      parent.type === astTypes.LOGICAL_EXPRESSION ||
-      parent.type === astTypes.BINARY_EXPRESSION
+      parent &&
+      (parent.type === astTypes.UNARY_EXPRESSION ||
+        parent.type === astTypes.LOGICAL_EXPRESSION ||
+        parent.type === astTypes.BINARY_EXPRESSION)
     ) {
       return addParen(serialized);
     }