--- dist/index.mjs	2021-07-22 21:19:31.000000000 +0200
+++ index-patched.mjs	2021-07-22 21:15:30.000000000 +0200
@@ -11,6 +11,7 @@
 var IMEMBER = 'IMEMBER';
 var IENDSTATEMENT = 'IENDSTATEMENT';
 var IARRAY = 'IARRAY';
+var IMEMBEREXPR = 'IMEMBEREXPR';
 
 function Instruction(type, value) {
   this.type = type;
@@ -174,7 +175,15 @@
         nstack.push(n1 ? true : !!evaluate(n2, expr, values));
       } else if (item.value === '=') {
         f = expr.binaryOps[item.value];
-        nstack.push(f(n1, evaluate(n2, expr, values), values));
+        // Name is created as in obj.property.arrayIdx.etc
+        let property = '';
+        while (typeof n1 === 'string' && n1.startsWith('.')) {
+          property = n1 + property;
+          n1 = nstack.pop();
+        }
+        nstack.push(
+          f(n1, evaluate(n2, expr, values), values, property !== '' ? property.slice(1) : undefined)
+        );
       } else {
         f = expr.binaryOps[item.value];
         nstack.push(f(resolveExpression(n1, values), resolveExpression(n2, values)));
@@ -247,6 +256,14 @@
       nstack.push(createExpressionEvaluator(item, expr));
     } else if (type === IEXPREVAL) {
       nstack.push(item);
+    } else if (type === IMEMBEREXPR) {
+      if (item.value === '.') {
+        n1 = nstack.pop();
+        // Create name as in obj.property.arrayIdx.etc
+        nstack.push('.' + n1);
+      } else {
+        nstack.push('.' + item.value);
+      }
     } else if (type === IMEMBER) {
       n1 = nstack.pop();
       nstack.push(n1[item.value]);
@@ -1137,13 +1154,28 @@
       instr.push(new Instruction(IFUNDEF, varName.value));
       continue;
     }
-    if (varName.type !== IVAR && varName.type !== IMEMBER) {
-      throw new Error('expected variable for assignment');
+    if (varName.type === IOP2 && varName.value === '[') {
+      this.parseVariableAssignmentExpression(varValue);
+      instr.push(new Instruction(IMEMBEREXPR, '.'));
+      instr.push(new Instruction(IEXPR, varValue));
+      instr.push(binaryInstruction('='));
+      continue;
     }
-    this.parseVariableAssignmentExpression(varValue);
-    instr.push(new Instruction(IVARNAME, varName.value));
-    instr.push(new Instruction(IEXPR, varValue));
-    instr.push(binaryInstruction('='));
+    if (varName.type === IMEMBER) {
+      this.parseVariableAssignmentExpression(varValue);
+      instr.push(new Instruction(IMEMBEREXPR, varName.value));
+      instr.push(new Instruction(IEXPR, varValue));
+      instr.push(binaryInstruction('='));
+      continue;
+    }
+    if (varName.type === IVAR) {
+      this.parseVariableAssignmentExpression(varValue);
+      instr.push(new Instruction(IVARNAME, varName.value));
+      instr.push(new Instruction(IEXPR, varValue));
+      instr.push(binaryInstruction('='));
+      continue;
+    }
+    throw new Error('expected variable for assignment');
   }
 };
 
@@ -1566,8 +1598,22 @@
   return +(value[0] + 'e' + (value[1] ? (+value[1] + exp) : exp));
 }
 
-function setVar(name, value, variables) {
-  if (variables) variables[name] = value;
+function setVar(nameOrObj, value, variables, property) {
+  if (typeof nameOrObj === 'string') {
+    if (variables) {
+      if (property) {
+        variables[nameOrObj][property] = value;
+      } else {
+        variables[nameOrObj] = value;
+      }
+    }
+  } else {
+    if (property) {
+      nameOrObj[property] = value;
+    } else {
+      throw new Error('Cannot change value of reference to array or object');
+    }
+  }
   return value;
 }