protected void consumeMemberExpressionWithSimpleName() {
	FieldReference fr =
		new FieldReference(
			this.identifierStack[this.identifierPtr],
			this.identifierPositionStack[this.identifierPtr--]);
	this.identifierLengthPtr--;
		//optimize push/pop
	fr.receiver = this.expressionStack[this.expressionPtr];
	//fieldreference begins at the receiver
	fr.sourceStart = fr.receiver.sourceStart;
	this.expressionStack[this.expressionPtr] = fr;
}