Serialize assignment expressions.

pkg/analyzer/lib/src/summary/summarize_const_expr.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library serialization.summarize_const_expr;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/src/summary/format.dart';
 import 'package:analyzer/src/summary/idl.dart';
@@ skipping 36 matching lines @@
    * See [UnlinkedConstBuilder.isInvalid].
    */
   bool isInvalid = false;
 
   /**
    * See [UnlinkedConstBuilder.operations].
    */
   final List<UnlinkedConstOperation> operations = <UnlinkedConstOperation>[];
 
   /**
+   * See [UnlinkedConstBuilder.assignmentOperators].
+   */
+  final List<UnlinkedExprAssignOperator> assignmentOperators =
+      <UnlinkedExprAssignOperator>[];
+
+  /**
    * See [UnlinkedConstBuilder.ints].
    */
   final List<int> ints = <int>[];
 
   /**
    * See [UnlinkedConstBuilder.doubles].
    */
   final List<double> doubles = <double>[];
 
   /**
@@ skipping 76 matching lines @@
   /**
    * Return the [UnlinkedConstBuilder] that corresponds to the state of this
    * serializer.
    */
   UnlinkedConstBuilder toBuilder() {
     if (isInvalid) {
       return new UnlinkedConstBuilder(isInvalid: true);
     }
     return new UnlinkedConstBuilder(
         operations: operations,
+        assignmentOperators: assignmentOperators,
         ints: ints,
         doubles: doubles,
         strings: strings,
         references: references);
   }
 
   void _pushInt(int value) {
     assert(value >= 0);
     if (value >= (1 << 32)) {
       int numOfComponents = 0;
@@ skipping 71 matching lines @@
       _serialize(expr.condition);
       _serialize(expr.thenExpression);
       _serialize(expr.elseExpression);
       operations.add(UnlinkedConstOperation.conditional);
     } else if (expr is PrefixExpression) {
       _serializePrefixExpression(expr);
     } else if (expr is PropertyAccess) {
       _serializePropertyAccess(expr);
     } else if (expr is ParenthesizedExpression) {
       _serialize(expr.expression);
+    } else if (expr is AssignmentExpression) {
+      _serializeAssignment(expr);
     } else {
       throw new StateError('Unknown expression type: $expr');
     }
   }
 
+  void _serializeAssignment(AssignmentExpression expr) {
+    // Push the assignment operator.
+    TokenType operator = expr.operator.type;
+    if (operator == TokenType.EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.assign);
+    } else if (operator == TokenType.QUESTION_QUESTION_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.ifNull);
+    } else if (operator == TokenType.STAR_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.multiply);
+    } else if (operator == TokenType.SLASH_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.divide);
+    } else if (operator == TokenType.TILDE_SLASH_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.floorDivide);
+    } else if (operator == TokenType.PERCENT_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.modulo);
+    } else if (operator == TokenType.PLUS_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.plus);
+    } else if (operator == TokenType.MINUS_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.minus);
+    } else if (operator == TokenType.LT_LT_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.shiftLeft);
+    } else if (operator == TokenType.GT_GT_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.shiftRight);
+    } else if (operator == TokenType.AMPERSAND_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.bitAnd);
+    } else if (operator == TokenType.CARET_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.bitXor);
+    } else if (operator == TokenType.BAR_EQ) {
+      assignmentOperators.add(UnlinkedExprAssignOperator.bitOr);
+    } else {
+      throw new StateError('Unknown assignment operator: $operator');
+    }
+    // Push the target and prepare the assignment operation.
+    Expression leftHandSide = expr.leftHandSide;
+    UnlinkedConstOperation assignOperation;
+    if (_isIdentifierSequence(leftHandSide)) {
+      EntityRefBuilder ref = serializeIdentifierSequence(leftHandSide);
+      references.add(ref);
+      assignOperation = UnlinkedConstOperation.assignToRef;
+    } else if (leftHandSide is PropertyAccess) {
+      _serialize(leftHandSide.target);
+      strings.add(leftHandSide.propertyName.name);
+      assignOperation = UnlinkedConstOperation.assignToProperty;
+    } else if (leftHandSide is IndexExpression) {
+      _serialize(leftHandSide.target);
+      _serialize(leftHandSide.index);
+      assignOperation = UnlinkedConstOperation.assignToIndex;
+    } else {
+      throw new StateError('Unsupported LHS: $leftHandSide');
+    }
+    // Push the value.
+    _serialize(expr.rightHandSide);
+    // Push the target-specific assignment operation.
+    operations.add(assignOperation);
+  }
+
   void _serializeBinaryExpression(BinaryExpression expr) {
     _serialize(expr.leftOperand);
     _serialize(expr.rightOperand);
     TokenType operator = expr.operator.type;
     if (operator == TokenType.EQ_EQ) {
       operations.add(UnlinkedConstOperation.equal);
     } else if (operator == TokenType.BANG_EQ) {
       operations.add(UnlinkedConstOperation.notEqual);
     } else if (operator == TokenType.AMPERSAND_AMPERSAND) {
       operations.add(UnlinkedConstOperation.and);
@@ skipping 129 matching lines @@
         expr = (expr as PrefixedIdentifier).prefix;
       } else if (expr is PropertyAccess) {
         expr = (expr as PropertyAccess).target;
       } else {
         return false;
       }
     }
     return false;
   }
 }