// string addition assign expression
public void createBCode(CodeGeneration gen) {
TypeDecl dest = getDest().type();
TypeDecl source = getSource().type();
if (dest.isString()) {
getDest().createAssignLoadDest(gen);
// new StringBuffer()
TypeDecl stringBuffer = lookupType("java.lang", "StringBuffer");
String classname = stringBuffer.constantPoolName();
String desc;
int index;
TypeDecl argumentType;
stringBuffer.emitNew(gen); // new StringBuffer
gen.emitDup(); // dup
desc = "()V";
index = gen.constantPool().addMethodref(classname, "<init>", desc);
gen.emit(Bytecode.INVOKESPECIAL, -1).add2(index); // invokespecial StringBuffer()
gen.emitSwap();
// append
argumentType = dest.stringPromotion();
desc = "(" + argumentType.typeDescriptor() + ")" + stringBuffer.typeDescriptor();
index = gen.constantPool().addMethodref(classname, "append", desc);
gen.emit(Bytecode.INVOKEVIRTUAL, -argumentType.variableSize())
.add2(index); // StringBuffer.append
getSource().createBCode(gen);
// typed append
argumentType = source.stringPromotion();
desc = "(" + argumentType.typeDescriptor() + ")" + stringBuffer.typeDescriptor();
index = gen.constantPool().addMethodref(classname, "append", desc);
gen.emit(Bytecode.INVOKEVIRTUAL, -argumentType.variableSize())
.add2(index); // StringBuffer.append
// toString
desc = "()" + type().typeDescriptor();
index = gen.constantPool().addMethodref(classname, "toString", desc);
gen.emit(Bytecode.INVOKEVIRTUAL, 0).add2(index); // StringBuffer.toString
if (needsPush()) {
getDest().createPushAssignmentResult(gen);
}
getDest().emitStore(gen);
} else {
super.createBCode(gen);
}
}
/** @apilevel internal */
public void flushCollectionCache() {
super.flushCollectionCache();
}
/** @apilevel low-level */
public void flushCache() {
super.flushCache();
}