/*
* feature -- Basic operations
*/
public virtual void call(object agent, object[] open_operands)
// Call associated routine `agent' with open arguments `open_operands'.
{
#if ASSERTIONS
ASSERTIONS.CHECK("open_operands_not_void", open_operands != null);
#endif
}
// Last result of a function call
public object item(object agent, object[] open_operands)
// Call associated routine `agent' with open arguments `open_operands'.
{
#if ASSERTIONS
ASSERTIONS.CHECK("open_operands_not_void", open_operands != null);
#endif
call(agent, open_operands);
return(last_result);
}
public static bool is_assertion_checked(Type t, ASSERTION_LEVEL_ENUM val, bool saved_caller_supplier_precondition)
// Are assertions checked for type `t' for assertion type `val'.
// Note that `val' is not a combination.
{
ASSERTION_LEVEL_ENUM type_assertion_level;
object obj;
bool Result;
#if ASSERTIONS
ASSERTIONS.CHECK("Valid val",
(val == ASSERTION_LEVEL_ENUM.no) ||
(val == ASSERTION_LEVEL_ENUM.check) ||
(val == ASSERTION_LEVEL_ENUM.require) ||
(val == ASSERTION_LEVEL_ENUM.ensure) ||
(val == ASSERTION_LEVEL_ENUM.loop) ||
(val == ASSERTION_LEVEL_ENUM.invariant));
#endif
Result = !in_assertion();
if (Result)
{
if (val == ASSERTION_LEVEL_ENUM.require && saved_caller_supplier_precondition)
{
Result = true;
}
else
{
// Let's extract the specified assertion level for type `t'.
// If `is_global_assertion_level_set' is set, then we can return
// the global one.
if (is_global_assertion_level_set)
{
return((global_assertion_level & val) == val);
}
else if ((assertion_levels != null))
{
obj = assertion_levels [t];
if (obj != null)
{
type_assertion_level = (ASSERTION_LEVEL_ENUM)obj;
}
else
{
type_assertion_level = ASSERTION_LEVEL_ENUM.no;
}
}
else
{
type_assertion_level = ASSERTION_LEVEL_ENUM.no;
}
Result = ((type_assertion_level & val) == val);
}
}
return(Result);
}
public static bool same_type(object Current, object other)
// Is type of current object identical to type of `other'?
{
bool Result = false;
RT_GENERIC_TYPE l_current_type, l_other_type;
EIFFEL_TYPE_INFO l_current;
#if ASSERTIONS
ASSERTIONS.REQUIRE("other_not_void", other != null);
#endif
if (Current == null)
{
generate_call_on_void_target_exception();
}
else
{
Result = Current.GetType().Equals(other.GetType());
if (Result)
{
l_current = Current as EIFFEL_TYPE_INFO;
if (l_current != null)
{
// We perform generic conformance in case it is needed.
l_current_type = l_current.____type();
if (l_current_type != null)
{
// Because we already know that `Current' and `other' have
// the same type, therefore cast to EIFFEL_TYPE_INFO is
// going to succeed.
l_other_type = ((EIFFEL_TYPE_INFO)other).____type();
#if ASSERTIONS
ASSERTIONS.CHECK("has_derivation", l_other_type != null);
ASSERTIONS.CHECK("Same base type", l_current_type.type.Equals(l_other_type.type));
#endif
Result = l_current_type.Equals(l_other_type);
}
}
else
{
// It is not generic, then they definitely have the same type.
// No need to assign Result again, as it is already holding the true value.
}
}
}
#if ASSERTIONS
ASSERTIONS.ENSURE("definition", Result == (conforms_to(Current, other) &&
conforms_to(other, Current)));
#endif
return(Result);
}
//FIXME: to remove when TUPLE is updated not to use this routine anymore.
public static Type type_of_generic_parameter(object an_obj, int pos)
// Given an Eiffel object `an_obj', find the associated type of generic parameter
// at position `pos'.
{
EIFFEL_TYPE_INFO l_object = an_obj as EIFFEL_TYPE_INFO;
RT_GENERIC_TYPE l_gen_type;
RT_CLASS_TYPE cl_type;
Type Result = null;
if (l_object != null)
{
#if ASSERTIONS
ASSERTIONS.REQUIRE("Has generic info", l_object.____type() != null);
ASSERTIONS.REQUIRE("Valid position `pos'",
(pos > 0) && (pos <= l_object.____type().count));
#endif
l_gen_type = l_object.____type();
cl_type = (RT_CLASS_TYPE)l_gen_type.generics [pos - 1];
if (!cl_type.is_basic())
{
if (cl_type.type.Value != (System.IntPtr) 0)
{
Result = interface_type(Type.GetTypeFromHandle(cl_type.type));
}
else
{
/* Generic parameter is of type NONE, so we return an instance
* of RT_NONE_TYPE as associated type. It is mostly there to fix
* assertions violations in TUPLE when one of the elements of
* a manifest tuple is `Void'. */
#if ASSERTIONS
ASSERTIONS.CHECK("Is NONE type.", cl_type is RT_NONE_TYPE);
#endif
Result = typeof(RT_NONE_TYPE);
}
}
else
{
Result = Type.GetTypeFromHandle(cl_type.type);
}
}
return(Result);
}
/*
* feature -- Status report
*/
public static bool conforms_to(object Current, object other)
// Does type of current object conform to type
// of `other' (as per Eiffel: The Language, chapter 13)?
{
bool Result = false;
RT_GENERIC_TYPE l_current_type, l_other_type;
EIFFEL_TYPE_INFO current_info = Current as EIFFEL_TYPE_INFO;
EIFFEL_TYPE_INFO other_info = other as EIFFEL_TYPE_INFO;
#if ASSERTIONS
ASSERTIONS.REQUIRE("other_not_void", other != null);
#endif
if (Current == null)
{
generate_call_on_void_target_exception();
}
else
{
if (other_info == null)
{
// `other' is not an Eiffel object, we simply check for .NET conformance
Result = other.GetType().IsAssignableFrom(Current.GetType());
}
else if (current_info == null)
{
// `other' is an Eiffel object, but not `Current', therefore there is
// no conformance. We do nothing since `Result' is already initialized to
// false.
}
else
{
l_current_type = current_info.____type();
l_other_type = other_info.____type();
if (l_other_type == null)
{
// Parent type represented by the `other' instance
// is not generic, therefore `Current' should directly
// conform to the parent type.
Result = ISE_RUNTIME.interface_type(other_info.GetType()).IsAssignableFrom(Current.GetType());
}
else if (l_current_type == null)
{
// Parent is generic, but not type represented by
// `Current', so let's first check if it simply
// conforms without looking at the generic parameter.
Result = ISE_RUNTIME.interface_type(other_info.GetType()).IsAssignableFrom(Current.GetType());
if (Result)
{
// It does conform, so now we have to go through
// the parents to make sure it has the same generic
// derivation.
// FIXME: we should use feature `conform_to' from RT_TYPE here.
}
}
else
{
// Both types are generic. We first check if they
// simply conforms.
#if ASSERTIONS
ASSERTIONS.CHECK("l_current_type_not_void", l_current_type != null);
ASSERTIONS.CHECK("l_other_type_not_void", l_other_type != null);
#endif
Result = ISE_RUNTIME.interface_type(other_info.GetType()).IsAssignableFrom(Current.GetType());
if (Result)
{
Result = l_current_type.conform_to(l_other_type);
}
}
}
}
return(Result);
}
// Tag of last checked assertion
public static void assertion_initialize(RuntimeTypeHandle type_handle)
// Initializes runtime datastructure for assembly associated with
// `type_handle'.
{
assertion_levels = new Hashtable(100);
Assembly a = Type.GetTypeFromHandle(type_handle).Assembly;
ASSERTION_LEVEL_ATTRIBUTE level_attribute;
ASSERTION_LEVEL_ENUM l_common_level, l_current_level;
bool l_computed, l_same_level;
#if ASSERTIONS
ASSERTIONS.CHECK("There should be an assembly", a != null);
#endif
try {
object [] cas = a.GetCustomAttributes(typeof(ASSERTION_LEVEL_ATTRIBUTE), false);
if ((cas != null) && (cas.Length > 0))
{
l_same_level = true;
l_computed = false;
l_common_level = ASSERTION_LEVEL_ENUM.no;
foreach (object ca in cas)
{
level_attribute = (ASSERTION_LEVEL_ATTRIBUTE)ca;
l_current_level = level_attribute.assertion_level;
assertion_levels.Add(
level_attribute.class_type, // key
l_current_level); // value
if (!l_computed)
{
l_common_level = l_current_level;
l_computed = true;
}
else
{
if (l_same_level)
{
l_same_level = (l_common_level == l_current_level);
}
}
}
if (l_same_level)
{
global_assertion_level = l_common_level;
is_global_assertion_level_set = true;
}
else
{
is_global_assertion_level_set = false;
}
}
else
{
global_assertion_level = ASSERTION_LEVEL_ENUM.no;
is_global_assertion_level_set = true;
}
} catch {
global_assertion_level = ASSERTION_LEVEL_ENUM.no;
is_global_assertion_level_set = true;
}
}