using System.Collections;
using System.Reflection;
using System.Reflection.Emit;
+using System.Globalization;
namespace Mono.CSharp {
+ // Maybe can be usefull to derive from MemberCore
+ class EnumMember: Attributable {
+ string name;
+ Enum parent;
+ Location loc;
+
+ static string[] attribute_targets = new string [] { "field" };
+
+ public FieldBuilder builder;
+
+ public EnumMember (string name, Enum parent, Location loc, Attributes attrs):
+ base (attrs)
+ {
+ this.name = name;
+ this.parent = parent;
+ this.loc = loc;
+ }
+
+ public override void ApplyAttributeBuilder(Attribute a, CustomAttributeBuilder cb)
+ {
+ if (a.Type == TypeManager.marshal_as_attr_type) {
+ UnmanagedMarshal marshal = a.GetMarshal ();
+ if (marshal != null) {
+ builder.SetMarshal (marshal);
+ return;
+ }
+ Report.Warning_T (-24, a.Location);
+ return;
+ }
+
+ builder.SetCustomAttribute (cb);
+ }
+
+ public override AttributeTargets AttributeTargets {
+ get {
+ return AttributeTargets.Field;
+ }
+ }
+
+ public override bool IsClsCompliaceRequired(DeclSpace ds)
+ {
+ return parent.IsClsCompliaceRequired (ds);
+ }
+
+ public void DefineMember (TypeBuilder tb)
+ {
+ FieldAttributes attr = FieldAttributes.Public | FieldAttributes.Static
+ | FieldAttributes.Literal;
+
+ builder = tb.DefineField (name, tb, attr);
+ }
+
+ public void Emit (EmitContext ec)
+ {
+ if (OptAttributes != null)
+ OptAttributes.Emit (ec, this);
+ }
+
+ // TODO: caching would be usefull
+ public ObsoleteAttribute GetObsoleteAttribute (EmitContext ec)
+ {
+ if (OptAttributes == null)
+ return null;
+
+ Attribute obsolete_attr = OptAttributes.Search (TypeManager.obsolete_attribute_type, ec);
+ if (obsolete_attr == null)
+ return null;
+
+ ObsoleteAttribute obsolete = obsolete_attr.GetObsoleteAttribute (ec.DeclSpace);
+ if (obsolete == null)
+ return null;
+
+ return obsolete;
+ }
+
+ protected override string[] ValidAttributeTargets {
+ get {
+ return attribute_targets;
+ }
+ }
+ }
+
/// <summary>
/// Enumeration container
/// </summary>
public class Enum : DeclSpace {
-
ArrayList ordered_enums;
- public readonly string BaseType;
- public Attributes OptAttributes;
+
+ public Expression BaseType;
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;
+
+
+ Hashtable name_to_member;
public const int AllowedModifiers =
Modifiers.NEW |
Modifiers.INTERNAL |
Modifiers.PRIVATE;
- public Enum (TypeContainer parent, string type, int mod_flags, string name, Attributes attrs, Location l)
- : base (parent, name, l)
+ public Enum (NamespaceEntry ns, TypeContainer parent, Expression type, int mod_flags,
+ string name, Attributes attrs, Location l)
+ : base (ns, parent, name, attrs, l)
{
this.BaseType = type;
- ModFlags = Modifiers.Check (AllowedModifiers, mod_flags, Modifiers.PUBLIC, l);
- OptAttributes = attrs;
+ ModFlags = Modifiers.Check (AllowedModifiers, mod_flags,
+ IsTopLevel ? Modifiers.INTERNAL : Modifiers.PRIVATE, l);
ordered_enums = new ArrayList ();
member_to_location = new Hashtable ();
member_to_value = new Hashtable ();
+ in_transit = new Hashtable ();
field_builders = new ArrayList ();
+
+ name_to_member = new Hashtable ();
}
/// <summary>
if (defined_names.Contains (name))
return AdditionResult.NameExists;
+ if (name == "value__") {
+ Report.Error (76, loc, "An item in an enumeration can't have an identifier `value__'");
+ return AdditionResult.Error;
+ }
+
DefineName (name, expr);
ordered_enums.Add (name);
member_to_attributes = new Hashtable ();
member_to_attributes.Add (name, opt_attrs);
+
+ name_to_member.Add (name, new EnumMember (name, this, loc, opt_attrs));
return AdditionResult.Success;
}
if (TypeBuilder != null)
return TypeBuilder;
- TypeAttributes attr = TypeAttributes.Class | TypeAttributes.Sealed;
+ TypeAttributes attr = Modifiers.TypeAttr (ModFlags, IsTopLevel);
- UnderlyingType = TypeManager.LookupType (BaseType);
+ attr |= TypeAttributes.Class | TypeAttributes.Sealed;
+
+ if (!(BaseType is TypeLookupExpression)) {
+ Report.Error (1008, Location,
+ "Type byte, sbyte, short, ushort, int, uint, " +
+ "long, or ulong expected (got: `{0}')", BaseType);
+ return null;
+ }
+
+ UnderlyingType = ResolveType (BaseType, false, Location);
if (UnderlyingType != TypeManager.int32_type &&
UnderlyingType != TypeManager.uint32_type &&
}
if (IsTopLevel) {
- ModuleBuilder builder = CodeGen.ModuleBuilder;
-
- if ((ModFlags & Modifiers.PUBLIC) != 0)
- attr |= TypeAttributes.Public;
- else
- attr |= TypeAttributes.NotPublic;
+ if (TypeManager.NamespaceClash (Name, Location))
+ return null;
+ ModuleBuilder builder = CodeGen.Module.Builder;
+
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);
}
if (e is IntConstant || e is UIntConstant || e is LongConstant ||
e is ByteConstant || e is SByteConstant || e is ShortConstant ||
- e is UShortConstant || e is ULongConstant || e is EnumConstant)
+ e is UShortConstant || e is ULongConstant || e is EnumConstant ||
+ e is CharConstant)
return true;
else
return false;
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;
+ }
+
+ //
+ // Horrible, horrible. But there is no other way we can pass the EmitContext
+ // to the recursive definition triggered by the evaluation of a forward
+ // expression
+ //
+ static EmitContext current_ec = null;
+
/// <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
/// </summary>
public object LookupEnumValue (EmitContext ec, string name, Location loc)
{
+
object default_value = null;
Constant c = null;
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
string n = (string) ordered_enums [i];
Location m_loc = (Mono.CSharp.Location)
member_to_location [n];
+ in_transit.Add (name, true);
+
+ EmitContext old_ec = current_ec;
+ current_ec = ec;
+
default_value = LookupEnumValue (ec, n, m_loc);
+
+ current_ec = old_ec;
+
+ in_transit.Remove (name);
+ if (default_value == null)
+ return null;
}
default_value = GetNextDefaultValue (default_value);
} else {
bool old = ec.InEnumContext;
ec.InEnumContext = true;
+ in_transit.Add (name, true);
+
+ EmitContext old_ec = current_ec;
+ current_ec = ec;
val = val.Resolve (ec);
- ec.InEnumContext = old;
+ current_ec = old_ec;
- if (val == null) {
- Report.Error (-12, loc, "Definition is circular.");
+ in_transit.Remove (name);
+ ec.InEnumContext = old;
+
+ if (val == null)
return null;
- }
- if (IsValidEnumConstant (val)) {
- c = (Constant) val;
- default_value = c.GetValue ();
-
- if (default_value == null) {
- Error_ConstantValueCannotBeConverted (c, loc);
- return null;
- }
-
- } else {
+ if (!IsValidEnumConstant (val)) {
Report.Error (
1008, loc,
"Type byte, sbyte, short, ushort, int, uint, long, or " +
"ulong expected (have: " + val + ")");
return null;
}
+
+ 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 (!ImplicitConversionExists (etype, UnderlyingType)){
+ Convert.Error_CannotImplicitConversion (
+ loc, c.Type, UnderlyingType);
+ return null;
+ }
+ }
}
- FieldAttributes attr = FieldAttributes.Public | FieldAttributes.Static
- | FieldAttributes.Literal;
-
- FieldBuilder fb = TypeBuilder.DefineField (name, UnderlyingType, attr);
+ EnumMember em = name_to_member [name] as EnumMember;
+ em.DefineMember (TypeBuilder);
- try {
- default_value = TypeManager.ChangeType (default_value, UnderlyingType);
- } catch {
+ bool fail;
+ default_value = TypeManager.ChangeType (default_value, UnderlyingType, out fail);
+ if (fail){
Error_ConstantValueCannotBeConverted (c, loc);
return null;
}
- fb.SetConstant (default_value);
- field_builders.Add (fb);
+ em.builder.SetConstant (default_value);
+ field_builders.Add (em.builder);
member_to_value [name] = default_value;
- if (!TypeManager.RegisterFieldValue (fb, default_value))
+ if (!TypeManager.RegisterFieldValue (em.builder, default_value))
return null;
- //
- // Now apply attributes
- //
- Attribute.ApplyAttributes (ec, fb, fb, (Attributes) member_to_attributes [name], loc);
-
return default_value;
}
+
+ public override bool DefineMembers (TypeContainer parent)
+ {
+ return true;
+ }
public override bool Define (TypeContainer parent)
{
//
if (TypeBuilder == null)
return false;
-
- EmitContext ec = new EmitContext (parent, this, Location, null,
+
+ EmitContext ec = new EmitContext (this, this, Location, null,
UnderlyingType, ModFlags, false);
+
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 (default_value == null)
return true;
-
} else {
- FieldBuilder fb = TypeBuilder.DefineField (
- name, UnderlyingType, attr);
+ if (name == "value__"){
+ Report.Error (76, loc, "The name `value__' is reserved for enumerations");
+ return false;
+ }
+
+ EnumMember em = name_to_member [name] as EnumMember;
+
+ em.DefineMember (TypeBuilder);
+ FieldBuilder fb = em.builder;
if (default_value == null) {
Report.Error (543, loc, "Enumerator value for '" + name + "' is too large to " +
"fit in its type");
return false;
}
-
- try {
- default_value = TypeManager.ChangeType (default_value, UnderlyingType);
- } catch {
+
+ bool fail;
+ default_value = TypeManager.ChangeType (default_value, UnderlyingType, out fail);
+ if (fail){
Error_ConstantValueCannotBeConverted (default_value, loc);
return false;
}
if (!TypeManager.RegisterFieldValue (fb, default_value))
return false;
-
- //
- // Apply attributes on the enum member
- //
- 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;
+ }
+
+ public override void Emit (TypeContainer tc)
+ {
+ EmitContext ec = new EmitContext (tc, this, Location, null, null, ModFlags, false);
+
+ if (OptAttributes != null) {
+ OptAttributes.Emit (ec, this);
+ }
+
+ foreach (EnumMember em in name_to_member.Values) {
+ em.Emit (ec);
+ }
+
+ base.Emit (tc);
+ }
+
+ protected override bool IsIdentifierClsCompliant (DeclSpace ds)
+ {
+ if (!base.IsIdentifierClsCompliant (ds))
+ return false;
+
+ for (int i = 1; i < ordered_enums.Count; ++i) {
+ string checked_name = ordered_enums [i] as string;
+ for (int ii = 0; ii < ordered_enums.Count; ++ii) {
+ if (ii == i)
+ continue;
+
+ string enumerator_name = ordered_enums [ii] as string;
+ if (String.Compare (checked_name, enumerator_name, true, CultureInfo.InvariantCulture) == 0) {
+ Report.SymbolRelatedToPreviousError ((Location)member_to_location [enumerator_name], enumerator_name);
+ Report.Error_T (3005, (Location)member_to_location [checked_name], GetEnumeratorName (checked_name));
+ break;
+ }
+ }
+ }
+ return true;
+ }
+
+ protected override bool VerifyClsCompliance (DeclSpace ds)
+ {
+ if (!base.VerifyClsCompliance (ds))
+ return false;
+
+ if (!AttributeTester.IsClsCompliant (UnderlyingType)) {
+ Report.Error_T (3009, Location, GetSignatureForError (), TypeManager.CSharpName (UnderlyingType));
+ }
return true;
}
+ /// <summary>
+ /// Returns full enum name.
+ /// </summary>
+ string GetEnumeratorName (string valueName)
+ {
+ return String.Concat (Name, ".", valueName);
+ }
+
//
- // 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 ();
if ((mt & MemberTypes.Field) != 0) {
+ if (criteria is string){
+ if (member_to_value [criteria] == null && current_ec != null){
+ LookupEnumValue (current_ec, (string) criteria, Location.Null);
+ }
+ }
+
foreach (FieldBuilder fb in field_builders)
if (filter (fb, criteria) == true)
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 {
return (Expression) defined_names [name];
}
}
+
+ public override AttributeTargets AttributeTargets {
+ get {
+ return AttributeTargets.Enum;
+ }
+ }
+
+ protected override void VerifyObsoleteAttribute()
+ {
+ // UnderlyingType is never obsolete
+ }
+
+ /// <summary>
+ /// Returns ObsoleteAttribute for both enum type and enum member
+ /// </summary>
+ public ObsoleteAttribute GetObsoleteAttribute (EmitContext ec, string identifier)
+ {
+ if ((caching_flags & Flags.Obsolete_Undetected) == 0 && (caching_flags & Flags.Obsolete) == 0) {
+ return null;
+ }
+
+ ObsoleteAttribute oa = GetObsoleteAttribute (ec.DeclSpace);
+ if (oa != null)
+ return oa;
+
+ EnumMember em = (EnumMember)name_to_member [identifier];
+ oa = em.GetObsoleteAttribute (ec);
+
+ if (oa == null)
+ return null;
+
+ caching_flags |= Flags.Obsolete;
+ return oa;
+ }
}
}
projects / mono.git / blobdiff