public override CILInstructionField BuildNode(ParseTreeNode node)
{
CILInstructionField result = null;
var instrFieldParseTreeNode = node.GetFirstChildWithGrammarName(GrammarNames.INSTR_FIELD);
var ldfldParseTreeNode = instrFieldParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_ldfld);
if (ldfldParseTreeNode != null)
{
result = new LoadFieldInstruction();
}
var ldfldaParseTreeNode = instrFieldParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_ldflda);
if (ldfldaParseTreeNode != null)
{
result = new LoadFieldAddressInstruction();
}
var ldsfldParseTreeNode = instrFieldParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_ldsfld);
if (ldsfldParseTreeNode != null)
{
result = new LoadStaticFieldInstruction();
}
var stfldParseTreeNode = instrFieldParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_stfld);
if (stfldParseTreeNode != null)
{
result = new SetFieldInstruction();
}
var stsfldParseTreeNode = instrFieldParseTreeNode?.GetFirstChildWithGrammarName(GrammarNames.keyword_stsfld);
if (stsfldParseTreeNode != null)
{
result = new SetStaticFieldInstruction();
}
if (result != null)
{
var typeParseTreeNode = node.GetFirstChildWithGrammarName(GrammarNames.type);
result.FieldType = TypeParseTreeNodeHelper.GetType(typeParseTreeNode);
var typeSpecParseTreeNode = node.GetFirstChildWithGrammarName(GrammarNames.typeSpec);
result.FieldOwnerTypeSpecification = TypeSpecParseTreeNodeHelper.GetValue(typeSpecParseTreeNode);
var idParseTreeNode = node.GetFirstChildWithGrammarName(GrammarNames.id);
result.FieldName = IdParseTreeNodeHelper.GetValue(idParseTreeNode);
return(result);
}
throw new ArgumentException("Cannot recognize CIL instruction field.");
}
protected override void VisitLoadFieldAddressInstruction(LoadFieldAddressInstruction instruction)
{
ControlState.EvaluationStack.PopValue(out CilValueReference thisRef);
var classInstance = ManagedMemory.Load(thisRef) as CilClassInstance;
var fieldValue = classInstance.Fields[instruction.FieldId];
var fieldPointer = new CilValueManagedPointer(fieldValue);
ControlState.EvaluationStack.PushValue(fieldPointer);
ControlState.MoveToNextInstruction();
}
protected abstract void VisitLoadFieldAddressInstruction(LoadFieldAddressInstruction instruction);
