public void generateOptimizedStringConcatenationCreation(
BlockScope blockScope, CodeStream codeStream, int typeID) {
// keep implementation in sync with BinaryExpression
// #generateOptimizedStringConcatenationCreation
if (this.referencesTable == null) {
super.generateOptimizedStringConcatenationCreation(blockScope, codeStream, typeID);
} else {
if ((((this.bits & ASTNode.OperatorMASK) >> ASTNode.OperatorSHIFT) == OperatorIds.PLUS)
&& ((this.bits & ASTNode.ReturnTypeIDMASK) == TypeIds.T_JavaLangString)
&& this.constant == Constant.NotAConstant) {
int pc = codeStream.position;
BinaryExpression cursor = this.referencesTable[this.arity - 1];
// silence warnings
int restart = 0;
for (restart = this.arity - 1; restart >= 0; restart--) {
if (((((cursor = this.referencesTable[restart]).bits & ASTNode.OperatorMASK)
>> ASTNode.OperatorSHIFT)
== OperatorIds.PLUS)
&& ((cursor.bits & ASTNode.ReturnTypeIDMASK) == TypeIds.T_JavaLangString)) {
if (cursor.constant != Constant.NotAConstant) {
codeStream.newStringContatenation(); // new: java.lang.StringBuffer
codeStream.dup();
codeStream.ldc(cursor.constant.stringValue());
codeStream.invokeStringConcatenationStringConstructor();
// invokespecial: java.lang.StringBuffer.<init>(Ljava.lang.String;)V
break;
}
} else {
cursor.generateOptimizedStringConcatenationCreation(
blockScope, codeStream, cursor.implicitConversion & TypeIds.COMPILE_TYPE_MASK);
break;
}
}
restart++;
if (restart == 0) { // reached the leftmost expression
cursor.left.generateOptimizedStringConcatenationCreation(
blockScope, codeStream, cursor.left.implicitConversion & TypeIds.COMPILE_TYPE_MASK);
}
int pcAux;
for (int i = restart; i < this.arity; i++) {
codeStream.recordPositionsFrom(pc, (cursor = this.referencesTable[i]).left.sourceStart);
pcAux = codeStream.position;
cursor.right.generateOptimizedStringConcatenation(
blockScope, codeStream, cursor.right.implicitConversion & TypeIds.COMPILE_TYPE_MASK);
codeStream.recordPositionsFrom(pcAux, cursor.right.sourceStart);
}
codeStream.recordPositionsFrom(pc, this.left.sourceStart);
pc = codeStream.position;
this.right.generateOptimizedStringConcatenation(
blockScope, codeStream, this.right.implicitConversion & TypeIds.COMPILE_TYPE_MASK);
codeStream.recordPositionsFrom(pc, this.right.sourceStart);
} else {
super.generateOptimizedStringConcatenationCreation(blockScope, codeStream, typeID);
}
}
}
/** Code generation for string literal */
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
int pc = codeStream.position;
if (valueRequired) codeStream.ldc(constant.stringValue());
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
if (!valueRequired) currentScope.problemReporter().unusedObjectAllocation(this);
int pc = codeStream.position;
MethodBinding codegenBinding = this.binding.original();
ReferenceBinding allocatedType = codegenBinding.declaringClass;
codeStream.new_(allocatedType);
boolean isUnboxing = (this.implicitConversion & TypeIds.UNBOXING) != 0;
if (valueRequired || isUnboxing) {
codeStream.dup();
}
// better highlight for allocation: display the type individually
if (this.type != null) { // null for enum constant body
codeStream.recordPositionsFrom(pc, this.type.sourceStart);
} else {
// push enum constant name and ordinal
codeStream.ldc(String.valueOf(this.enumConstant.name));
codeStream.generateInlinedValue(this.enumConstant.binding.id);
}
// handling innerclass instance allocation - enclosing instance arguments
if (allocatedType.isNestedType()) {
codeStream.generateSyntheticEnclosingInstanceValues(
currentScope, allocatedType, enclosingInstance(), this);
}
// generate the arguments for constructor
generateArguments(this.binding, this.arguments, currentScope, codeStream);
// handling innerclass instance allocation - outer local arguments
if (allocatedType.isNestedType()) {
codeStream.generateSyntheticOuterArgumentValues(currentScope, allocatedType, this);
}
// invoke constructor
if (this.syntheticAccessor == null) {
codeStream.invoke(
Opcodes.OPC_invokespecial, codegenBinding, null /* default declaringClass */);
} else {
// synthetic accessor got some extra arguments appended to its signature, which need values
for (int i = 0,
max = this.syntheticAccessor.parameters.length - codegenBinding.parameters.length;
i < max;
i++) {
codeStream.aconst_null();
}
codeStream.invoke(
Opcodes.OPC_invokespecial, this.syntheticAccessor, null /* default declaringClass */);
}
if (valueRequired) {
codeStream.generateImplicitConversion(this.implicitConversion);
} else if (isUnboxing) {
// conversion only generated if unboxing
codeStream.generateImplicitConversion(this.implicitConversion);
switch (postConversionType(currentScope).id) {
case T_long:
case T_double:
codeStream.pop2();
break;
default:
codeStream.pop();
}
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
if (this.anonymousType != null) {
this.anonymousType.generateCode(currentScope, codeStream);
}
}