// Pushes ancestors into the stack until it has found one of type T.
public bool GetAncestors <T>(ref Stack <object> ancestors)
{
ancestors.Push(this);
if (GetParent(out T value))
{
ancestors.Push(value);
return(true);
}
return(Parent != null &&
Parent.GetAncestors <T>(ref ancestors));
}
public static bool IsFieldValueType(this ASTRecord record)
{
var ancestors = new Stack <object>();
if (!record.GetAncestors <Field>(ref ancestors))
{
return(false);
}
var field = (Field)ancestors.Pop();
return(field.Type.Desugar().TryGetClass(out var decl) && decl.IsValueType);
}
public static bool FunctionReturnsClassByValue(this ASTRecord record)
{
var ancestors = new Stack <object>();
if (!record.GetAncestors <Function>(ref ancestors))
{
return(false);
}
var function = (Function)ancestors.Pop();
var tagType = function.ReturnType.Type.Desugar() as TagType;
return(tagType?.Declaration is Class);
}
public static bool IsFieldValueType(this ASTRecord record)
{
var ancestors = new Stack <object>();
if (!record.GetAncestors <Field>(ref ancestors))
{
return(false);
}
var field = (Field)ancestors.Pop();
Class decl;
if (!field.Type.Desugar().IsTagDecl(out decl))
{
return(false);
}
return(decl.IsValueType);
}