Expression transformBinaryExpression(final BinaryExpression bin) {
if (bin instanceof DeclarationExpression) {
Expression optimized = transformDeclarationExpression(bin);
if (optimized != null) {
return optimized;
}
}
Object[] list = bin.getNodeMetaData(BINARY_EXP_TARGET);
Token operation = bin.getOperation();
int operationType = operation.getType();
Expression rightExpression = bin.getRightExpression();
Expression leftExpression = bin.getLeftExpression();
if (bin instanceof DeclarationExpression && leftExpression instanceof VariableExpression) {
ClassNode declarationType = ((VariableExpression) leftExpression).getOriginType();
if (rightExpression instanceof ConstantExpression) {
ClassNode unwrapper = ClassHelper.getUnwrapper(declarationType);
ClassNode wrapper = ClassHelper.getWrapper(declarationType);
if (!rightExpression.getType().equals(declarationType)
&& wrapper.isDerivedFrom(ClassHelper.Number_TYPE)
&& WideningCategories.isDoubleCategory(unwrapper)) {
ConstantExpression constant = (ConstantExpression) rightExpression;
if (constant.getValue() != null) {
return optimizeConstantInitialization(
bin, operation, constant, leftExpression, declarationType);
}
}
}
}
if (operationType == Types.EQUAL && leftExpression instanceof PropertyExpression) {
MethodNode directMCT =
leftExpression.getNodeMetaData(StaticTypesMarker.DIRECT_METHOD_CALL_TARGET);
if (directMCT != null) {
return transformPropertyAssignmentToSetterCall(
(PropertyExpression) leftExpression, rightExpression, directMCT);
}
}
if (operationType == Types.COMPARE_EQUAL || operationType == Types.COMPARE_NOT_EQUAL) {
// let's check if one of the operands is the null constant
CompareToNullExpression compareToNullExpression = null;
if (isNullConstant(leftExpression)) {
compareToNullExpression =
new CompareToNullExpression(
staticCompilationTransformer.transform(rightExpression),
operationType == Types.COMPARE_EQUAL);
} else if (isNullConstant(rightExpression)) {
compareToNullExpression =
new CompareToNullExpression(
staticCompilationTransformer.transform(leftExpression),
operationType == Types.COMPARE_EQUAL);
}
if (compareToNullExpression != null) {
compareToNullExpression.setSourcePosition(bin);
return compareToNullExpression;
}
} else if (operationType == Types.KEYWORD_IN) {
return convertInOperatorToTernary(bin, rightExpression, leftExpression);
}
if (list != null) {
if (operationType == Types.COMPARE_TO) {
StaticTypesTypeChooser typeChooser = staticCompilationTransformer.getTypeChooser();
ClassNode classNode = staticCompilationTransformer.getClassNode();
ClassNode leftType = typeChooser.resolveType(leftExpression, classNode);
if (leftType.implementsInterface(ClassHelper.COMPARABLE_TYPE)) {
ClassNode rightType = typeChooser.resolveType(rightExpression, classNode);
if (rightType.implementsInterface(ClassHelper.COMPARABLE_TYPE)) {
Expression left = staticCompilationTransformer.transform(leftExpression);
Expression right = staticCompilationTransformer.transform(rightExpression);
MethodCallExpression call =
new MethodCallExpression(left, "compareTo", new ArgumentListExpression(right));
call.setImplicitThis(false);
call.setMethodTarget(COMPARE_TO_METHOD);
CompareIdentityExpression compareIdentity = new CompareIdentityExpression(left, right);
compareIdentity.putNodeMetaData(
StaticTypesMarker.INFERRED_RETURN_TYPE, ClassHelper.boolean_TYPE);
TernaryExpression result =
new TernaryExpression(
new BooleanExpression(compareIdentity), // a==b
CONSTANT_ZERO,
new TernaryExpression(
new BooleanExpression(new CompareToNullExpression(left, true)), // a==null
CONSTANT_MINUS_ONE,
new TernaryExpression(
new BooleanExpression(
new CompareToNullExpression(right, true)), // b==null
CONSTANT_ONE,
call)));
compareIdentity.putNodeMetaData(
StaticTypesMarker.INFERRED_RETURN_TYPE, ClassHelper.int_TYPE);
result.putNodeMetaData(StaticTypesMarker.INFERRED_TYPE, ClassHelper.int_TYPE);
TernaryExpression expr = (TernaryExpression) result.getFalseExpression();
expr.putNodeMetaData(StaticTypesMarker.INFERRED_TYPE, ClassHelper.int_TYPE);
expr.getFalseExpression()
.putNodeMetaData(StaticTypesMarker.INFERRED_TYPE, ClassHelper.int_TYPE);
return result;
}
}
}
boolean isAssignment = StaticTypeCheckingSupport.isAssignment(operationType);
MethodCallExpression call;
MethodNode node = (MethodNode) list[0];
String name = (String) list[1];
Expression left = staticCompilationTransformer.transform(leftExpression);
Expression right = staticCompilationTransformer.transform(rightExpression);
BinaryExpression optimized = tryOptimizeCharComparison(left, right, bin);
if (optimized != null) {
optimized.removeNodeMetaData(BINARY_EXP_TARGET);
return transformBinaryExpression(optimized);
}
call = new MethodCallExpression(left, name, new ArgumentListExpression(right));
call.setImplicitThis(false);
call.setMethodTarget(node);
MethodNode adapter = StaticCompilationTransformer.BYTECODE_BINARY_ADAPTERS.get(operationType);
if (adapter != null) {
ClassExpression sba =
new ClassExpression(StaticCompilationTransformer.BYTECODE_ADAPTER_CLASS);
// replace with compareEquals
call =
new MethodCallExpression(sba, "compareEquals", new ArgumentListExpression(left, right));
call.setMethodTarget(adapter);
call.setImplicitThis(false);
}
if (!isAssignment) return call;
// case of +=, -=, /=, ...
// the method represents the operation type only, and we must add an assignment
return new BinaryExpression(
left, Token.newSymbol("=", operation.getStartLine(), operation.getStartColumn()), call);
}
if (bin.getOperation().getType() == Types.EQUAL
&& leftExpression instanceof TupleExpression
&& rightExpression instanceof ListExpression) {
// multiple assignment
ListOfExpressionsExpression cle = new ListOfExpressionsExpression();
boolean isDeclaration = bin instanceof DeclarationExpression;
List<Expression> leftExpressions = ((TupleExpression) leftExpression).getExpressions();
List<Expression> rightExpressions = ((ListExpression) rightExpression).getExpressions();
Iterator<Expression> leftIt = leftExpressions.iterator();
Iterator<Expression> rightIt = rightExpressions.iterator();
if (isDeclaration) {
while (leftIt.hasNext()) {
Expression left = leftIt.next();
if (rightIt.hasNext()) {
Expression right = rightIt.next();
BinaryExpression bexp = new DeclarationExpression(left, bin.getOperation(), right);
bexp.setSourcePosition(right);
cle.addExpression(bexp);
}
}
} else {
// (next, result) = [ result, next+result ]
// -->
// def tmp1 = result
// def tmp2 = next+result
// next = tmp1
// result = tmp2
int size = rightExpressions.size();
List<Expression> tmpAssignments = new ArrayList<Expression>(size);
List<Expression> finalAssignments = new ArrayList<Expression>(size);
for (int i = 0; i < Math.min(size, leftExpressions.size()); i++) {
Expression left = leftIt.next();
Expression right = rightIt.next();
VariableExpression tmpVar = new VariableExpression("$tmpVar$" + tmpVarCounter++);
BinaryExpression bexp = new DeclarationExpression(tmpVar, bin.getOperation(), right);
bexp.setSourcePosition(right);
tmpAssignments.add(bexp);
bexp = new BinaryExpression(left, bin.getOperation(), new VariableExpression(tmpVar));
bexp.setSourcePosition(left);
finalAssignments.add(bexp);
}
for (Expression tmpAssignment : tmpAssignments) {
cle.addExpression(tmpAssignment);
}
for (Expression finalAssignment : finalAssignments) {
cle.addExpression(finalAssignment);
}
}
return staticCompilationTransformer.transform(cle);
}
return staticCompilationTransformer.superTransform(bin);
}
