/// <summary>
/// C# allows this kind of scenarios:
/// interface I { void M (); }
/// class X { public void M (); }
/// class Y : X, I { }
///
/// For that case, we create an explicit implementation function
/// I.M in Y.
/// </summary>
void DefineProxy(TypeSpec iface, MethodSpec base_method, MethodSpec iface_method)
{
// TODO: Handle nested iface names
string proxy_name;
var ns = iface.MemberDefinition.Namespace;
if (string.IsNullOrEmpty(ns))
{
proxy_name = iface.MemberDefinition.Name + "." + iface_method.Name;
}
else
{
proxy_name = ns + "." + iface.MemberDefinition.Name + "." + iface_method.Name;
}
var param = iface_method.Parameters;
MethodBuilder proxy = container.TypeBuilder.DefineMethod(
proxy_name,
MethodAttributes.Private |
MethodAttributes.HideBySig |
MethodAttributes.NewSlot |
MethodAttributes.CheckAccessOnOverride |
MethodAttributes.Virtual | MethodAttributes.Final,
CallingConventions.Standard | CallingConventions.HasThis,
base_method.ReturnType.GetMetaInfo(), param.GetMetaInfo());
if (iface_method.IsGeneric)
{
var gnames = iface_method.GenericDefinition.TypeParameters.Select(l => l.Name).ToArray();
proxy.DefineGenericParameters(gnames);
}
for (int i = 0; i < param.Count; i++)
{
string name = param.FixedParameters [i].Name;
ParameterAttributes attr = ParametersCompiled.GetParameterAttribute(param.FixedParameters [i].ModFlags);
proxy.DefineParameter(i + 1, attr, name);
}
int top = param.Count;
var ec = new EmitContext(new ProxyMethodContext(container), proxy.GetILGenerator(), null, null);
ec.EmitThis();
// TODO: GetAllParametersArguments
for (int i = 0; i < top; i++)
{
ec.EmitArgumentLoad(i);
}
ec.Emit(OpCodes.Call, base_method);
ec.Emit(OpCodes.Ret);
container.TypeBuilder.DefineMethodOverride(proxy, (MethodInfo)iface_method.GetMetaInfo());
}
/// <summary>
/// C# allows this kind of scenarios:
/// interface I { void M (); }
/// class X { public void M (); }
/// class Y : X, I { }
///
/// For that case, we create an explicit implementation function
/// I.M in Y.
/// </summary>
void DefineProxy(Type iface, MethodInfo base_method, MethodInfo iface_method,
AParametersCollection param)
{
// TODO: Handle nested iface names
string proxy_name = SimpleName.RemoveGenericArity(iface.FullName) + "." + iface_method.Name;
MethodBuilder proxy = container.TypeBuilder.DefineMethod(
proxy_name,
MethodAttributes.HideBySig |
MethodAttributes.NewSlot |
MethodAttributes.CheckAccessOnOverride |
MethodAttributes.Virtual,
CallingConventions.Standard | CallingConventions.HasThis,
base_method.ReturnType, param.GetEmitTypes());
Type[] gargs = TypeManager.GetGenericArguments(iface_method);
if (gargs.Length > 0)
{
string[] gnames = new string[gargs.Length];
for (int i = 0; i < gargs.Length; ++i)
{
gnames[i] = gargs[i].Name;
}
#if GMCS_SOURCE
proxy.DefineGenericParameters(gnames);
#else
throw new NotSupportedException();
#endif
}
for (int i = 0; i < param.Count; i++)
{
string name = param.FixedParameters [i].Name;
ParameterAttributes attr = ParametersCompiled.GetParameterAttribute(param.FixedParameters [i].ModFlags);
proxy.DefineParameter(i + 1, attr, name);
}
int top = param.Count;
ILGenerator ig = proxy.GetILGenerator();
for (int i = 0; i <= top; i++)
{
ParameterReference.EmitLdArg(ig, i);
}
ig.Emit(OpCodes.Call, base_method);
ig.Emit(OpCodes.Ret);
container.TypeBuilder.DefineMethodOverride(proxy, iface_method);
}
public virtual void ApplyAttributes(MethodBuilder mb, ConstructorBuilder cb, int index, PredefinedAttributes pa)
{
if (builder != null)
{
throw new InternalErrorException("builder already exists");
}
var pattrs = ParametersCompiled.GetParameterAttribute(modFlags);
if (HasOptionalExpression)
{
pattrs |= ParameterAttributes.Optional;
}
if (mb == null)
{
builder = cb.DefineParameter(index, pattrs, Name);
}
else
{
builder = mb.DefineParameter(index, pattrs, Name);
}
if (OptAttributes != null)
{
OptAttributes.Emit();
}
if (HasDefaultValue)
{
//
// Emit constant values for true constants only, the other
// constant-like expressions will rely on default value expression
//
var def_value = DefaultValue;
Constant c = def_value != null ? def_value.Child as Constant : default_expr as Constant;
if (c != null)
{
if (c.Type.BuiltinType == BuiltinTypeSpec.Type.Decimal)
{
pa.DecimalConstant.EmitAttribute(builder, (decimal)c.GetValue(), c.Location);
}
else
{
builder.SetConstant(c.GetValue());
}
}
else if (default_expr.Type.IsStruct)
{
//
// Handles special case where default expression is used with value-type
//
// void Foo (S s = default (S)) {}
//
builder.SetConstant(null);
}
}
if (parameter_type != null)
{
if (parameter_type.BuiltinType == BuiltinTypeSpec.Type.Dynamic)
{
pa.Dynamic.EmitAttribute(builder);
}
else if (parameter_type.HasDynamicElement)
{
pa.Dynamic.EmitAttribute(builder, parameter_type, Location);
}
}
}