// this method is called later, when all the objects' names are registered as references
public void Define(AnalysisEnvironment environment, FunctionDeclaration decl)
{
if (this is Interop.ClrFunctionRecord)
{
return;
}
this.Declaration = decl;
// evaluate the type used for current function. including the return types and parameter types.
// a function is complete only when:
// (1) its return type can be described with available types.
// (2) all of its parameter types can be described with available types.
// (3) all of the locals can be described with available types.
// (4) all the references to outside is within the availble definitions.
// (1) return type evaluation
this.ReturnType = environment.GetDirectTypeRecord(decl.ReturnType);
if (this.ReturnType is Record.IOperationType op)
{
op.Evaluate(environment);
}
else
{
this.ReturnType.GetIdentifer(this.Parent, environment);
}
// (2) parameter evaluation
this.ParameterModifer.Clear();
this.Parameters.Clear();
this.ParameterSymbol.Clear();
this.ParameterType.Clear();
foreach (var param in decl.Parameters)
{
DataRecord data = new DataRecord();
data.Definition = environment.GetDirectTypeRecord(param.Type);
data.ExplicitType = param.Type;
data.Expression = param.Default;
data.Symbol = param.Identifer.Value;
data.ClrTypeRecordIndex = data.Definition.ClrTypeRecordIndex;
ParameterType.Add(data.Definition);
ParameterSymbol.Add(data.Symbol, data.Oid);
environment.SetObject(data.Oid, data);
var modifers = Analysis.ParameterModifers.ByValue;
foreach (var item in param.Modifers)
{
switch (item.Value.ToLower())
{
case "readonly":
modifers |= ParameterModifers.Readonly; break;
case "extends":
modifers |= ParameterModifers.Extends; break;
case "byname":
modifers = modifers & (~ParameterModifers.PassAttributes);
modifers |= ParameterModifers.ByName;
break;
case "byref":
case "byreference":
modifers = modifers & (~ParameterModifers.PassAttributes);
modifers |= ParameterModifers.ByReference;
break;
case "byval":
case "byvalue":
modifers = modifers & (~ParameterModifers.PassAttributes);
modifers |= ParameterModifers.ByValue;
break;
case "cdom":
case "currentdomain":
modifers |= ParameterModifers.CurrentDomain; break;
}
}
this.ParameterModifer.Add(modifers);
this.Parameters.Add(param.Identifer.Value, data);
data.ClrTypeRecordIndex = data.Definition.ClrTypeRecordIndex;
}
}