//
// Author: Miguel de Icaza (miguel@gnu.org)
// Ravi Pratap (ravi@ximian.com)
+// Anirban Bhattacharjee (banirban@novell.com)
//
// Licensed under the terms of the GNU GPL
//
using System.Reflection;
using System.Reflection.Emit;
-namespace Mono.CSharp {
+namespace Mono.MonoBASIC {
/// <summary>
/// Enumeration container
/// </summary>
public class Enum : DeclSpace {
-
ArrayList ordered_enums;
- public readonly string BaseType;
+
+ public Expression BaseType;
public Attributes OptAttributes;
public Type UnderlyingType;
// This is for members that have been defined
//
Hashtable member_to_value;
+
+ //
+ // This is used to mark members we're currently defining
+ //
+ Hashtable in_transit;
ArrayList field_builders;
Modifiers.INTERNAL |
Modifiers.PRIVATE;
- public Enum (TypeContainer parent, string type, int mod_flags, string name, Attributes attrs, Location l)
+ public Enum (TypeContainer parent, Expression type, int mod_flags, string name, Attributes attrs, Location l)
: base (parent, name, l)
{
this.BaseType = type;
- ModFlags = Modifiers.Check (AllowedModifiers, mod_flags, Modifiers.PUBLIC, l);
+ ModFlags = Modifiers.Check (AllowedModifiers, mod_flags,
+ IsTopLevel ? Modifiers.INTERNAL : Modifiers.PUBLIC, l);
OptAttributes = attrs;
ordered_enums = new ArrayList ();
member_to_location = new Hashtable ();
member_to_value = new Hashtable ();
+ in_transit = new Hashtable ();
field_builders = new ArrayList ();
}
if (TypeBuilder != null)
return TypeBuilder;
- TypeAttributes attr = TypeAttributes.Class | TypeAttributes.Sealed;
+ TypeAttributes attr = Modifiers.TypeAttr (ModFlags, IsTopLevel);
+
+ attr |= TypeAttributes.Class | TypeAttributes.Sealed;
- UnderlyingType = TypeManager.LookupType (BaseType);
+ UnderlyingType = ResolveType (BaseType, false, Location);
if (UnderlyingType != TypeManager.int32_type &&
UnderlyingType != TypeManager.uint32_type &&
UnderlyingType != TypeManager.ushort_type &&
UnderlyingType != TypeManager.byte_type &&
UnderlyingType != TypeManager.sbyte_type) {
- Report.Error (1008, Location,
+ Report.Error (30650, Location,
"Type byte, sbyte, short, ushort, int, uint, " +
"long, or ulong expected (got: " +
- TypeManager.CSharpName (UnderlyingType) + ")");
+ TypeManager.MonoBASIC_Name (UnderlyingType) + ")");
return null;
}
if (IsTopLevel) {
ModuleBuilder builder = CodeGen.ModuleBuilder;
- if ((ModFlags & Modifiers.PUBLIC) != 0)
- attr |= TypeAttributes.Public;
- else
- attr |= TypeAttributes.NotPublic;
-
TypeBuilder = builder.DefineType (Name, attr, TypeManager.enum_type);
} else {
TypeBuilder builder = Parent.TypeBuilder;
- if ((ModFlags & Modifiers.PUBLIC) != 0)
- attr |= TypeAttributes.NestedPublic;
- else
- attr |= TypeAttributes.NestedPrivate;
-
-
TypeBuilder = builder.DefineNestedType (
Basename, attr, TypeManager.enum_type);
}
return TypeBuilder;
}
- bool IsValidEnumConstant (Expression e)
+ bool IsValidEnumConstant (Expression e)
{
if (!(e is Constant))
return false;
void Error_ConstantValueCannotBeConverted (object val, Location loc)
{
if (val is Constant)
- Report.Error (31, loc, "Constant value '" + ((Constant) val).AsString () +
+ Report.Error (30439, loc, "Constant value '" + ((Constant) val).AsString () +
"' cannot be converted" +
- " to a " + TypeManager.CSharpName (UnderlyingType));
+ " to a " + TypeManager.MonoBASIC_Name (UnderlyingType));
else
- Report.Error (31, loc, "Constant value '" + val +
+ Report.Error (30439, loc, "Constant value '" + val +
"' cannot be converted" +
- " to a " + TypeManager.CSharpName (UnderlyingType));
+ " to a " + TypeManager.MonoBASIC_Name (UnderlyingType));
return;
}
+ /// <summary>
+ /// Determines if a standard implicit conversion exists from
+ /// expr_type to target_type
+ /// </summary>
+ public static bool ImplicitConversionExists (Type expr_type, Type target_type)
+ {
+ expr_type = TypeManager.TypeToCoreType (expr_type);
+
+ if (expr_type == TypeManager.void_type)
+ return false;
+
+ if (expr_type == target_type)
+ return true;
+
+ // First numeric conversions
+
+ if (expr_type == TypeManager.sbyte_type){
+ //
+ // From sbyte to short, int, long, float, double.
+ //
+ if ((target_type == TypeManager.int32_type) ||
+ (target_type == TypeManager.int64_type) ||
+ (target_type == TypeManager.double_type) ||
+ (target_type == TypeManager.float_type) ||
+ (target_type == TypeManager.short_type) ||
+ (target_type == TypeManager.decimal_type))
+ return true;
+
+ } else if (expr_type == TypeManager.byte_type){
+ //
+ // From byte to short, ushort, int, uint, long, ulong, float, double
+ //
+ if ((target_type == TypeManager.short_type) ||
+ (target_type == TypeManager.ushort_type) ||
+ (target_type == TypeManager.int32_type) ||
+ (target_type == TypeManager.uint32_type) ||
+ (target_type == TypeManager.uint64_type) ||
+ (target_type == TypeManager.int64_type) ||
+ (target_type == TypeManager.float_type) ||
+ (target_type == TypeManager.double_type) ||
+ (target_type == TypeManager.decimal_type))
+ return true;
+
+ } else if (expr_type == TypeManager.short_type){
+ //
+ // From short to int, long, float, double
+ //
+ if ((target_type == TypeManager.int32_type) ||
+ (target_type == TypeManager.int64_type) ||
+ (target_type == TypeManager.double_type) ||
+ (target_type == TypeManager.float_type) ||
+ (target_type == TypeManager.decimal_type))
+ return true;
+
+ } else if (expr_type == TypeManager.ushort_type){
+ //
+ // From ushort to int, uint, long, ulong, float, double
+ //
+ if ((target_type == TypeManager.uint32_type) ||
+ (target_type == TypeManager.uint64_type) ||
+ (target_type == TypeManager.int32_type) ||
+ (target_type == TypeManager.int64_type) ||
+ (target_type == TypeManager.double_type) ||
+ (target_type == TypeManager.float_type) ||
+ (target_type == TypeManager.decimal_type))
+ return true;
+
+ } else if (expr_type == TypeManager.int32_type){
+ //
+ // From int to long, float, double
+ //
+ if ((target_type == TypeManager.int64_type) ||
+ (target_type == TypeManager.double_type) ||
+ (target_type == TypeManager.float_type) ||
+ (target_type == TypeManager.decimal_type))
+ return true;
+
+ } else if (expr_type == TypeManager.uint32_type){
+ //
+ // From uint to long, ulong, float, double
+ //
+ if ((target_type == TypeManager.int64_type) ||
+ (target_type == TypeManager.uint64_type) ||
+ (target_type == TypeManager.double_type) ||
+ (target_type == TypeManager.float_type) ||
+ (target_type == TypeManager.decimal_type))
+ return true;
+
+ } else if ((expr_type == TypeManager.uint64_type) ||
+ (expr_type == TypeManager.int64_type)) {
+ //
+ // From long/ulong to float, double
+ //
+ if ((target_type == TypeManager.double_type) ||
+ (target_type == TypeManager.float_type) ||
+ (target_type == TypeManager.decimal_type))
+ return true;
+
+ } else if (expr_type == TypeManager.char_type){
+ //
+ // From char to ushort, int, uint, long, ulong, float, double
+ //
+ if ((target_type == TypeManager.ushort_type) ||
+ (target_type == TypeManager.int32_type) ||
+ (target_type == TypeManager.uint32_type) ||
+ (target_type == TypeManager.uint64_type) ||
+ (target_type == TypeManager.int64_type) ||
+ (target_type == TypeManager.float_type) ||
+ (target_type == TypeManager.double_type) ||
+ (target_type == TypeManager.decimal_type))
+ return true;
+
+ } else if (expr_type == TypeManager.float_type){
+ //
+ // float to double
+ //
+ if (target_type == TypeManager.double_type)
+ return true;
+ }
+
+ return false;
+ }
+
/// <summary>
/// This is used to lookup the value of an enum member. If the member is undefined,
/// it attempts to define it and return its value
{
object default_value = null;
Constant c = null;
+ TypeContainer parent = ec.TypeContainer;
- default_value = member_to_value [name];
+ // first check whether the requested name is there
+ // in the member list of enum
+ if (!(ordered_enums.Contains(name)))
+ Report.Error (30456, loc,
+ name + " is not found in member list of enum " + this.Name);
+ default_value = member_to_value [name];
+
if (default_value != null)
return default_value;
if (!defined_names.Contains (name))
return null;
+ if (in_transit.Contains (name)) {
+ Report.Error (110, loc, "The evaluation of the constant value for `" +
+ Name + "." + name + "' involves a circular definition.");
+ return null;
+ }
+
//
// So if the above doesn't happen, we have a member that is undefined
// We now proceed to define it
//
Expression val = this [name];
+ int idx = ordered_enums.IndexOf (name);
if (val == null) {
- int idx = ordered_enums.IndexOf (name);
+ //int idx = ordered_enums.IndexOf (name);
if (idx == 0)
default_value = 0;
else {
for (int i = 0; i < idx; ++i) {
string n = (string) ordered_enums [i];
- Location m_loc = (Mono.CSharp.Location)
+ Location m_loc = (Mono.MonoBASIC.Location)
member_to_location [n];
+ in_transit.Add (name, true);
default_value = LookupEnumValue (ec, n, m_loc);
+ in_transit.Remove (name);
+ if (default_value == null)
+ return null;
}
default_value = GetNextDefaultValue (default_value);
}
} else {
- bool old = ec.InEnumContext;
- ec.InEnumContext = true;
- val = val.Resolve (ec);
- ec.InEnumContext = old;
-
- if (val == null) {
- Report.Error (-12, loc, "Definition is circular.");
- return null;
+ // check for any cyclic dependency
+ if (val is Mono.MonoBASIC.SimpleName) {
+ int var_idx = ordered_enums.IndexOf (val.ToString());
+
+ if (idx <= var_idx)
+ Report.Error(30500, loc,
+ "The evaluation of the constant value for `" +
+ Name + "." + name + "' involves a circular definition");
+ else
+ default_value = member_to_value [val.ToString()];
}
+ else {
+ bool old = ec.InEnumContext;
+ ec.InEnumContext = true;
+ in_transit.Add (name, true);
+ val = val.Resolve (ec);
+ in_transit.Remove (name);
+ ec.InEnumContext = old;
+
+ if (val == null)
+ return null;
+
+ if (!IsValidEnumConstant (val)) {
+ Report.Error (
+ 30650, loc,
+ "Type byte, sbyte, short, ushort, int, uint, long, or " +
+ "ulong expected (have: " + val + ")");
+ return null;
+ }
- if (IsValidEnumConstant (val)) {
c = (Constant) val;
+
default_value = c.GetValue ();
+ }
+
+ if (default_value == null) {
+ Error_ConstantValueCannotBeConverted (c, loc);
+ return null;
+ }
+
+ if (val is EnumConstant) {
+ Type etype = TypeManager.EnumToUnderlying (c.Type);
- if (default_value == null) {
- Error_ConstantValueCannotBeConverted (c, loc);
+ if ( (!ImplicitConversionExists (etype, UnderlyingType)) &&
+ (!Expression.RuntimeConversionExists (ec, val, UnderlyingType)) ){
+ Expression.Error_CannotConvertImplicit (
+ loc, c.Type, UnderlyingType);
return null;
}
-
- } else {
- Report.Error (
- 1008, loc,
- "Type byte, sbyte, short, ushort, int, uint, long, or " +
- "ulong expected (have: " + val + ")");
- return null;
}
}
FieldAttributes attr = FieldAttributes.Public | FieldAttributes.Static
| FieldAttributes.Literal;
- FieldBuilder fb = TypeBuilder.DefineField (name, UnderlyingType, attr);
+ FieldBuilder fb = TypeBuilder.DefineField (name, TypeBuilder, attr);
try {
default_value = TypeManager.ChangeType (default_value, UnderlyingType);
return default_value;
}
+
+ public override bool DefineMembers (TypeContainer parent)
+ {
+ return true;
+ }
public override bool Define (TypeContainer parent)
{
object default_value = 0;
- FieldAttributes attr = FieldAttributes.Public | FieldAttributes.Static
- | FieldAttributes.Literal;
-
-
foreach (string name in ordered_enums) {
- //
- // Have we already been defined, thanks to some cross-referencing ?
- //
if (member_to_value.Contains (name))
continue;
- Location loc = (Mono.CSharp.Location) member_to_location [name];
+ Location loc = (Mono.MonoBASIC.Location) member_to_location [name];
if (this [name] != null) {
default_value = LookupEnumValue (ec, name, loc);
if (default_value == null)
return true;
-
} else {
- FieldBuilder fb = TypeBuilder.DefineField (
- name, UnderlyingType, attr);
-
+ FieldAttributes attr = FieldAttributes.Public | FieldAttributes.Static
+ | FieldAttributes.Literal;
+
+ FieldBuilder fb = TypeBuilder.DefineField (name, TypeBuilder, attr);
+
if (default_value == null) {
- Report.Error (543, loc, "Enumerator value for '" + name + "' is too large to " +
- "fit in its type");
+ Report.Error (30439, loc, "Enumerator value for '" + name + "' is too large to " +
+ "fit in its type");
return false;
}
-
- try {
+
+ try {
default_value = TypeManager.ChangeType (default_value, UnderlyingType);
- } catch {
+ } catch {
Error_ConstantValueCannotBeConverted (default_value, loc);
return false;
}
fb.SetConstant (default_value);
field_builders.Add (fb);
member_to_value [name] = default_value;
-
+
if (!TypeManager.RegisterFieldValue (fb, default_value))
return false;
//
- // Apply attributes on the enum member
+ // Now apply attributes
//
- Attribute.ApplyAttributes (ec, fb, fb, (Attributes) member_to_attributes [name], loc);
+ Attribute.ApplyAttributes (ec, fb, fb, (Attributes) member_to_attributes [name], loc);
}
default_value = GetNextDefaultValue (default_value);
}
Attribute.ApplyAttributes (ec, TypeBuilder, this, OptAttributes, Location);
-
return true;
}
//
- // Hack around System.Reflection as found everywhere else
+ // IMemberFinder
//
- public MemberInfo [] FindMembers (MemberTypes mt, BindingFlags bf,
- MemberFilter filter, object criteria)
+ public override MemberList FindMembers (MemberTypes mt, BindingFlags bf,
+ MemberFilter filter, object criteria)
{
ArrayList members = new ArrayList ();
members.Add (fb);
}
- int count = members.Count;
+ return new MemberList (members);
+ }
- if (count > 0) {
- MemberInfo [] mi = new MemberInfo [count];
- members.CopyTo (mi, 0);
- return mi;
+ public override MemberCache MemberCache {
+ get {
+ return null;
}
-
- return null;
}
public ArrayList ValueNames {
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