/// <summary>
/// This function tells whether one of our base classes implements
/// the given method (which turns out, it is valid to have an interface
/// implementation in a base
/// </summary>
bool BaseImplements(TypeSpec iface_type, MethodSpec mi, out MethodSpec base_method)
{
base_method = null;
var base_type = container.BaseType;
//
// Setup filter with no return type to give better error message
// about mismatch at return type when the check bellow rejects them
//
var parameters = mi.Parameters;
MethodSpec close_match = null;
while (true)
{
var candidates = MemberCache.FindMembers(base_type, mi.Name, false);
if (candidates == null)
{
base_method = close_match;
return(false);
}
MethodSpec similar_candidate = null;
foreach (var candidate in candidates)
{
if (candidate.Kind != MemberKind.Method)
{
continue;
}
if (candidate.Arity != mi.Arity)
{
continue;
}
var candidate_param = ((MethodSpec)candidate).Parameters;
if (!TypeSpecComparer.Override.IsEqual(parameters.Types, candidate_param.Types))
{
continue;
}
bool modifiers_match = true;
for (int i = 0; i < parameters.Count; ++i)
{
//
// First check exact ref/out match
//
if ((parameters.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask) == (candidate_param.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask))
{
continue;
}
modifiers_match = false;
//
// Different in ref/out only
//
if ((parameters.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask) != (candidate_param.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask))
{
if (similar_candidate == null)
{
if (!candidate.IsPublic)
{
break;
}
if (!TypeSpecComparer.Override.IsEqual(mi.ReturnType, ((MethodSpec)candidate).ReturnType))
{
break;
}
// It's used for ref/out ambiguity overload check
similar_candidate = (MethodSpec)candidate;
}
continue;
}
similar_candidate = null;
break;
}
if (!modifiers_match)
{
continue;
}
//
// From this point the candidate is used for detailed error reporting
// because it's very close match to what we are looking for
//
var m = (MethodSpec)candidate;
if (!m.IsPublic)
{
if (close_match == null)
{
close_match = m;
}
continue;
}
if (!TypeSpecComparer.Override.IsEqual(mi.ReturnType, m.ReturnType))
{
if (close_match == null)
{
close_match = m;
}
continue;
}
base_method = m;
if (mi.IsGeneric && !Method.CheckImplementingMethodConstraints(container, m, mi))
{
return(true);
}
}
if (base_method != null)
{
if (similar_candidate != null)
{
Report.SymbolRelatedToPreviousError(similar_candidate);
Report.SymbolRelatedToPreviousError(mi);
Report.SymbolRelatedToPreviousError(container);
Report.Warning(1956, 1, ((MemberCore)base_method.MemberDefinition).Location,
"The interface method `{0}' implementation is ambiguous between following methods: `{1}' and `{2}' in type `{3}'",
mi.GetSignatureForError(), base_method.GetSignatureForError(), similar_candidate.GetSignatureForError(), container.GetSignatureForError());
}
break;
}
base_type = candidates[0].DeclaringType.BaseType;
if (base_type == null)
{
base_method = close_match;
return(false);
}
}
if (!base_method.IsVirtual)
{
#if STATIC
var base_builder = base_method.GetMetaInfo() as MethodBuilder;
if (base_builder != null)
{
//
// We can avoid creating a proxy if base_method can be marked 'final virtual'. This can
// be done for all methods from compiled assembly
//
base_builder.__SetAttributes(base_builder.Attributes | MethodAttributes.Virtual | MethodAttributes.Final | MethodAttributes.NewSlot);
return(true);
}
#endif
DefineProxy(iface_type, base_method, mi);
}
return(true);
}
private static MemberSpec FindDocumentedMemberNoNest(
MemberCore mc, TypeSpec type, string member_name,
AParametersCollection param_list, DeclSpace ds, out int warning_type,
string cref, bool warn419, string name_for_error, Report Report)
{
warning_type = 0;
// var filter = new MemberFilter (member_name, 0, MemberKind.All, param_list, null);
IList <MemberSpec> found = null;
while (type != null && found == null)
{
found = MemberCache.FindMembers(type, member_name, false);
type = type.DeclaringType;
}
if (found == null)
{
return(null);
}
if (warn419 && found.Count > 1)
{
Report419(mc, name_for_error, found.ToArray(), Report);
}
return(found [0]);
/*
* if (param_list == null) {
* // search for fields/events etc.
* mis = TypeManager.MemberLookup (type, null,
* type, MemberKind.All,
* BindingRestriction.None,
* member_name, null);
* mis = FilterOverridenMembersOut (mis);
* if (mis == null || mis.Length == 0)
* return null;
* if (warn419 && IsAmbiguous (mis))
* Report419 (mc, name_for_error, mis, Report);
* return mis [0];
* }
*
* MethodSignature msig = new MethodSignature (member_name, null, param_list);
* mis = FindMethodBase (type,
* BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance,
* msig);
*
* if (warn419 && mis.Length > 0) {
* if (IsAmbiguous (mis))
* Report419 (mc, name_for_error, mis, Report);
* return mis [0];
* }
*
* // search for operators (whose parameters exactly
* // matches with the list) and possibly report CS1581.
* string oper = null;
* string return_type_name = null;
* if (member_name.StartsWith ("implicit operator ")) {
* Operator.GetMetadataName (Operator.OpType.Implicit);
* return_type_name = member_name.Substring (18).Trim (wsChars);
* }
* else if (member_name.StartsWith ("explicit operator ")) {
* oper = Operator.GetMetadataName (Operator.OpType.Explicit);
* return_type_name = member_name.Substring (18).Trim (wsChars);
* }
* else if (member_name.StartsWith ("operator ")) {
* oper = member_name.Substring (9).Trim (wsChars);
* switch (oper) {
* // either unary or binary
* case "+":
* oper = param_list.Length == 2 ?
* Operator.GetMetadataName (Operator.OpType.Addition) :
* Operator.GetMetadataName (Operator.OpType.UnaryPlus);
* break;
* case "-":
* oper = param_list.Length == 2 ?
* Operator.GetMetadataName (Operator.OpType.Subtraction) :
* Operator.GetMetadataName (Operator.OpType.UnaryNegation);
* break;
* default:
* oper = Operator.GetMetadataName (oper);
* if (oper != null)
* break;
*
* warning_type = 1584;
* Report.Warning (1020, 1, mc.Location, "Overloadable {0} operator is expected", param_list.Length == 2 ? "binary" : "unary");
* Report.Warning (1584, 1, mc.Location, "XML comment on `{0}' has syntactically incorrect cref attribute `{1}'",
* mc.GetSignatureForError (), cref);
* return null;
* }
* }
* // here we still don't consider return type (to
* // detect CS1581 or CS1002+CS1584).
* msig = new MethodSignature (oper, null, param_list);
*
* mis = FindMethodBase (type,
* BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance,
* msig);
* if (mis.Length == 0)
* return null; // CS1574
* var mi = mis [0];
* TypeSpec expected = mi is MethodSpec ?
* ((MethodSpec) mi).ReturnType :
* mi is PropertySpec ?
* ((PropertySpec) mi).PropertyType :
* null;
* if (return_type_name != null) {
* TypeSpec returnType = FindDocumentedType (mc, return_type_name, ds, cref, Report);
* if (returnType == null || returnType != expected) {
* warning_type = 1581;
* Report.Warning (1581, 1, mc.Location, "Invalid return type in XML comment cref attribute `{0}'", cref);
* return null;
* }
* }
* return mis [0];
*/
}
//
// Processes "see" or "seealso" elements from cref attribute.
//
void HandleXrefCommon(MemberCore mc, XmlElement xref)
{
string cref = xref.GetAttribute("cref");
// when, XmlReader, "if (cref == null)"
if (!xref.HasAttribute("cref"))
{
return;
}
// Nothing to be resolved the reference is marked explicitly
if (cref.Length > 2 && cref [1] == ':')
{
return;
}
// Additional symbols for < and > are allowed for easier XML typing
cref = cref.Replace('{', '<').Replace('}', '>');
var encoding = module.Compiler.Settings.Encoding;
var s = new MemoryStream(encoding.GetBytes(cref));
var source_file = new CompilationSourceFile(doc_module, mc.Location.SourceFile);
var report = new Report(doc_module.Compiler, new NullReportPrinter());
if (session == null)
{
session = new ParserSession {
UseJayGlobalArrays = true
}
}
;
SeekableStreamReader seekable = new SeekableStreamReader(s, encoding, session.StreamReaderBuffer);
var parser = new CSharpParser(seekable, source_file, report, session);
ParsedParameters = null;
ParsedName = null;
ParsedBuiltinType = null;
ParsedOperator = null;
parser.Lexer.putback_char = Tokenizer.DocumentationXref;
parser.Lexer.parsing_generic_declaration_doc = true;
parser.parse();
if (report.Errors > 0)
{
Report.Warning(1584, 1, mc.Location, "XML comment on `{0}' has syntactically incorrect cref attribute `{1}'",
mc.GetSignatureForError(), cref);
xref.SetAttribute("cref", "!:" + cref);
return;
}
MemberSpec member;
string prefix = null;
FullNamedExpression fne = null;
//
// Try built-in type first because we are using ParsedName as identifier of
// member names on built-in types
//
if (ParsedBuiltinType != null && (ParsedParameters == null || ParsedName != null))
{
member = ParsedBuiltinType.Type;
}
else
{
member = null;
}
if (ParsedName != null || ParsedOperator.HasValue)
{
TypeSpec type = null;
string member_name = null;
if (member == null)
{
if (ParsedOperator.HasValue)
{
type = mc.CurrentType;
}
else if (ParsedName.Left != null)
{
fne = ResolveMemberName(mc, ParsedName.Left);
if (fne != null)
{
var ns = fne as NamespaceExpression;
if (ns != null)
{
fne = ns.LookupTypeOrNamespace(mc, ParsedName.Name, ParsedName.Arity, LookupMode.Probing, Location.Null);
if (fne != null)
{
member = fne.Type;
}
}
else
{
type = fne.Type;
}
}
}
else
{
fne = ResolveMemberName(mc, ParsedName);
if (fne == null)
{
type = mc.CurrentType;
}
else if (ParsedParameters == null)
{
member = fne.Type;
}
else if (fne.Type.MemberDefinition == mc.CurrentType.MemberDefinition)
{
member_name = Constructor.ConstructorName;
type = fne.Type;
}
}
}
else
{
type = (TypeSpec)member;
member = null;
}
if (ParsedParameters != null)
{
var old_printer = mc.Module.Compiler.Report.SetPrinter(new NullReportPrinter());
try {
var context = new DocumentationMemberContext(mc, ParsedName ?? MemberName.Null);
foreach (var pp in ParsedParameters)
{
pp.Resolve(context);
}
} finally {
mc.Module.Compiler.Report.SetPrinter(old_printer);
}
}
if (type != null)
{
if (member_name == null)
{
member_name = ParsedOperator.HasValue ?
Operator.GetMetadataName(ParsedOperator.Value) : ParsedName.Name;
}
int parsed_param_count;
if (ParsedOperator == Operator.OpType.Explicit || ParsedOperator == Operator.OpType.Implicit)
{
parsed_param_count = ParsedParameters.Count - 1;
}
else if (ParsedParameters != null)
{
parsed_param_count = ParsedParameters.Count;
}
else
{
parsed_param_count = 0;
}
int parameters_match = -1;
do
{
var members = MemberCache.FindMembers(type, member_name, true);
if (members != null)
{
foreach (var m in members)
{
if (ParsedName != null && m.Arity != ParsedName.Arity)
{
continue;
}
if (ParsedParameters != null)
{
IParametersMember pm = m as IParametersMember;
if (pm == null)
{
continue;
}
if (m.Kind == MemberKind.Operator && !ParsedOperator.HasValue)
{
continue;
}
var pm_params = pm.Parameters;
int i;
for (i = 0; i < parsed_param_count; ++i)
{
var pparam = ParsedParameters[i];
if (i >= pm_params.Count || pparam == null || pparam.TypeSpec == null ||
!TypeSpecComparer.Override.IsEqual(pparam.TypeSpec, pm_params.Types[i]) ||
(pparam.Modifier & Parameter.Modifier.RefOutMask) != (pm_params.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask))
{
if (i > parameters_match)
{
parameters_match = i;
}
i = -1;
break;
}
}
if (i < 0)
{
continue;
}
if (ParsedOperator == Operator.OpType.Explicit || ParsedOperator == Operator.OpType.Implicit)
{
if (pm.MemberType != ParsedParameters[parsed_param_count].TypeSpec)
{
parameters_match = parsed_param_count + 1;
continue;
}
}
else
{
if (parsed_param_count != pm_params.Count)
{
continue;
}
}
}
if (member != null)
{
Report.Warning(419, 3, mc.Location,
"Ambiguous reference in cref attribute `{0}'. Assuming `{1}' but other overloads including `{2}' have also matched",
cref, member.GetSignatureForError(), m.GetSignatureForError());
break;
}
member = m;
}
}
// Continue with parent type for nested types
if (member == null)
{
type = type.DeclaringType;
}
else
{
type = null;
}
} while (type != null);
if (member == null && parameters_match >= 0)
{
for (int i = parameters_match; i < parsed_param_count; ++i)
{
Report.Warning(1580, 1, mc.Location, "Invalid type for parameter `{0}' in XML comment cref attribute `{1}'",
(i + 1).ToString(), cref);
}
if (parameters_match == parsed_param_count + 1)
{
Report.Warning(1581, 1, mc.Location, "Invalid return type in XML comment cref attribute `{0}'", cref);
}
}
}
}
if (member == null)
{
Report.Warning(1574, 1, mc.Location, "XML comment on `{0}' has cref attribute `{1}' that could not be resolved",
mc.GetSignatureForError(), cref);
cref = "!:" + cref;
}
else if (member == InternalType.Namespace)
{
cref = "N:" + fne.GetSignatureForError();
}
else
{
prefix = GetMemberDocHead(member);
cref = prefix + member.GetSignatureForDocumentation();
}
xref.SetAttribute("cref", cref);
}
/// <summary>
/// This function tells whether one of our base classes implements
/// the given method (which turns out, it is valid to have an interface
/// implementation in a base
/// </summary>
bool BaseImplements(TypeSpec iface_type, MethodSpec mi, out MethodSpec base_method)
{
base_method = null;
bool base_can_implement = true;
TypeSpec lookup_type;
//
// Special handling for properties/indexers which cannot have accessors
// implementing an interface found in different types (e.g. current and base)
//
if (mi.IsAccessor && container.Interfaces != null)
{
bool new_implementation = false;
foreach (var iface in container.Interfaces)
{
if (TypeSpecComparer.IsEqual(iface, iface_type))
{
new_implementation = true;
break;
}
}
if (new_implementation)
{
MemberFilter filter;
if (mi.Parameters.Count > 1)
{
var indexer_params = mi.Name [0] == 'g' ? mi.Parameters : IndexerSpec.CreateParametersFromSetter(mi, mi.Parameters.Count - 1);
filter = new MemberFilter(MemberCache.IndexerNameAlias, 0, MemberKind.Indexer, indexer_params, null);
}
else
{
var pname = mi.Name.Substring(4);
filter = MemberFilter.Property(pname, null);
}
var prop = MemberCache.FindMember(container.CurrentType, filter, BindingRestriction.DeclaredOnly | BindingRestriction.InstanceOnly);
if (prop != null && (prop.Modifiers & Modifiers.NEW) != 0)
{
base_can_implement = false;
}
}
}
if (base_can_implement)
{
lookup_type = container.BaseType;
if (lookup_type.ImplementsInterface(iface_type, false))
{
return(true);
}
}
else
{
lookup_type = container.CurrentType;
}
//
// Setup filter with no return type to give better error message
// about mismatch at return type when the check bellow rejects them
//
var parameters = mi.Parameters;
MethodSpec close_match = null;
while (true)
{
var candidates = MemberCache.FindMembers(lookup_type, mi.Name, !base_can_implement);
if (candidates == null)
{
base_method = close_match;
return(false);
}
MethodSpec similar_candidate = null;
foreach (var candidate in candidates)
{
if (candidate.Kind != MemberKind.Method)
{
continue;
}
if (candidate.Arity != mi.Arity)
{
continue;
}
var candidate_param = ((MethodSpec)candidate).Parameters;
if (!TypeSpecComparer.Override.IsEqual(parameters.Types, candidate_param.Types))
{
continue;
}
bool modifiers_match = true;
for (int i = 0; i < parameters.Count; ++i)
{
//
// First check exact ref/out match
//
if ((parameters.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask) == (candidate_param.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask))
{
continue;
}
modifiers_match = false;
//
// Different in ref/out only
//
if ((parameters.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask) != (candidate_param.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask))
{
if (similar_candidate == null)
{
if (!candidate.IsPublic)
{
break;
}
if (!TypeSpecComparer.Override.IsEqual(mi.ReturnType, ((MethodSpec)candidate).ReturnType))
{
break;
}
// It's used for ref/out ambiguity overload check
similar_candidate = (MethodSpec)candidate;
}
continue;
}
similar_candidate = null;
break;
}
if (!modifiers_match)
{
continue;
}
//
// From this point the candidate is used for detailed error reporting
// because it's very close match to what we are looking for
//
var m = (MethodSpec)candidate;
if (!m.IsPublic)
{
if (close_match == null)
{
close_match = m;
}
continue;
}
if (!TypeSpecComparer.Override.IsEqual(mi.ReturnType, m.ReturnType))
{
if (close_match == null)
{
close_match = m;
}
continue;
}
base_method = m;
if (mi.IsGeneric && !Method.CheckImplementingMethodConstraints(container, m, mi))
{
return(true);
}
}
if (base_method != null)
{
if (similar_candidate != null)
{
Report.SymbolRelatedToPreviousError(similar_candidate);
Report.SymbolRelatedToPreviousError(mi);
Report.SymbolRelatedToPreviousError(container);
Report.Warning(1956, 1, ((MemberCore)base_method.MemberDefinition).Location,
"The interface method `{0}' implementation is ambiguous between following methods: `{1}' and `{2}' in type `{3}'",
mi.GetSignatureForError(), base_method.GetSignatureForError(), similar_candidate.GetSignatureForError(), container.GetSignatureForError());
}
break;
}
if (!base_can_implement)
{
return(false);
}
lookup_type = candidates[0].DeclaringType.BaseType;
if (lookup_type == null)
{
base_method = close_match;
return(false);
}
}
if (!base_method.IsVirtual)
{
#if STATIC
var base_builder = base_method.GetMetaInfo() as MethodBuilder;
if (base_builder != null)
{
//
// We can avoid creating a proxy if base_method can be marked 'final virtual'. This can
// be done for all methods from compiled assembly
//
base_builder.__SetAttributes(base_builder.Attributes | MethodAttributes.Virtual | MethodAttributes.Final | MethodAttributes.NewSlot);
return(true);
}
#endif
DefineProxy(iface_type, base_method, mi);
}
return(true);
}
