327 lines
10 KiB
C#
327 lines
10 KiB
C#
// System.Reflection.RuntimeParameterInfo
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//
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// Authors:
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// Sean MacIsaac (macisaac@ximian.com)
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// Marek Safar (marek.safar@gmail.com)
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//
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// (C) 2001 Ximian, Inc.
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// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
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// Copyright 2013 Xamarin, Inc (http://www.xamarin.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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#if MONO_FEATURE_SRE
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using System.Reflection.Emit;
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#endif
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Collections.Generic;
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using System.Text;
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namespace System.Reflection
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{
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#if !NETCORE
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[ComVisible (true)]
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[ComDefaultInterfaceAttribute (typeof (_ParameterInfo))]
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[Serializable]
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[ClassInterfaceAttribute (ClassInterfaceType.None)]
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#endif
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[StructLayout (LayoutKind.Sequential)]
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class RuntimeParameterInfo : ParameterInfo {
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internal MarshalAsAttribute marshalAs;
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internal static void FormatParameters (StringBuilder sb, ParameterInfo[] p, CallingConventions callingConvention, bool serialization)
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{
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#if NETCORE
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throw new NotImplementedException ();
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#else
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for (int i = 0; i < p.Length; ++i) {
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if (i > 0)
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sb.Append (", ");
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Type t = p[i].ParameterType;
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string typeName = t.FormatTypeName (serialization);
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// Legacy: Why use "ByRef" for by ref parameters? What language is this?
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// VB uses "ByRef" but it should precede (not follow) the parameter name.
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// Why don't we just use "&"?
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if (t.IsByRef && !serialization) {
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sb.Append (typeName.TrimEnd (new char[] { '&' }));
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sb.Append (" ByRef");
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} else {
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sb.Append (typeName);
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}
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}
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if ((callingConvention & CallingConventions.VarArgs) != 0) {
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if (p.Length > 0)
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sb.Append (", ");
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sb.Append ("...");
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}
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#endif
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}
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#if MONO_FEATURE_SRE
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internal RuntimeParameterInfo (ParameterBuilder pb, Type type, MemberInfo member, int position) {
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this.ClassImpl = type;
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this.MemberImpl = member;
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if (pb != null) {
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this.NameImpl = pb.Name;
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this.PositionImpl = pb.Position - 1; // ParameterInfo.Position is zero-based
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this.AttrsImpl = (ParameterAttributes) pb.Attributes;
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} else {
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this.NameImpl = null;
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this.PositionImpl = position - 1;
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this.AttrsImpl = ParameterAttributes.None;
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}
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}
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internal static ParameterInfo New (ParameterBuilder pb, Type type, MemberInfo member, int position)
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{
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return new RuntimeParameterInfo (pb, type, member, position);
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}
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#endif
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/*FIXME this constructor looks very broken in the position parameter*/
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internal RuntimeParameterInfo (ParameterInfo pinfo, Type type, MemberInfo member, int position) {
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this.ClassImpl = type;
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this.MemberImpl = member;
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if (pinfo != null) {
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this.NameImpl = pinfo.Name;
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this.PositionImpl = pinfo.Position - 1; // ParameterInfo.Position is zero-based
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this.AttrsImpl = (ParameterAttributes) pinfo.Attributes;
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} else {
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this.NameImpl = null;
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this.PositionImpl = position - 1;
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this.AttrsImpl = ParameterAttributes.None;
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}
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}
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internal RuntimeParameterInfo (ParameterInfo pinfo, MemberInfo member) {
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this.ClassImpl = pinfo.ParameterType;
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this.MemberImpl = member;
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this.NameImpl = pinfo.Name;
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this.PositionImpl = pinfo.Position;
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this.AttrsImpl = pinfo.Attributes;
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this.DefaultValueImpl = GetDefaultValueImpl (pinfo);
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}
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/* to build a ParameterInfo for the return type of a method */
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internal RuntimeParameterInfo (Type type, MemberInfo member, MarshalAsAttribute marshalAs) {
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this.ClassImpl = type;
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this.MemberImpl = member;
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this.NameImpl = null;
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this.PositionImpl = -1; // since parameter positions are zero-based, return type pos is -1
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this.AttrsImpl = ParameterAttributes.Retval;
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this.marshalAs = marshalAs;
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}
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public override
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object DefaultValue {
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get {
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if (ClassImpl == typeof (Decimal) || ClassImpl == typeof (Decimal?)) {
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/* default values for decimals are encoded using a custom attribute */
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DecimalConstantAttribute[] attrs = (DecimalConstantAttribute[])GetCustomAttributes (typeof (DecimalConstantAttribute), false);
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if (attrs.Length > 0)
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return attrs [0].Value;
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} else if (ClassImpl == typeof (DateTime) || ClassImpl == typeof (DateTime?)) {
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/* default values for DateTime are encoded using a custom attribute */
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DateTimeConstantAttribute[] attrs = (DateTimeConstantAttribute[])GetCustomAttributes (typeof (DateTimeConstantAttribute), false);
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if (attrs.Length > 0)
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return attrs [0].Value;
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}
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return DefaultValueImpl;
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}
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}
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public override
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object RawDefaultValue {
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get {
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if (DefaultValue != null && DefaultValue.GetType ().IsEnum)
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return ((Enum)DefaultValue).GetValue ();
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/*FIXME right now DefaultValue doesn't throw for reflection-only assemblies. Change this once the former is fixed.*/
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return DefaultValue;
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}
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}
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public
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override
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int MetadataToken {
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get {
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if (MemberImpl is PropertyInfo) {
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PropertyInfo prop = (PropertyInfo)MemberImpl;
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MethodInfo mi = prop.GetGetMethod (true);
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if (mi == null)
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mi = prop.GetSetMethod (true);
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return mi.GetParametersInternal () [PositionImpl].MetadataToken;
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} else if (MemberImpl is MethodBase) {
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return GetMetadataToken ();
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}
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throw new ArgumentException ("Can't produce MetadataToken for member of type " + MemberImpl.GetType ());
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}
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}
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public
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override
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object[] GetCustomAttributes (bool inherit)
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{
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return MonoCustomAttrs.GetCustomAttributes (this, inherit);
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}
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public
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override
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object[] GetCustomAttributes (Type attributeType, bool inherit)
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{
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return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
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}
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internal object GetDefaultValueImpl (ParameterInfo pinfo)
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{
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FieldInfo field = typeof (ParameterInfo).GetField ("DefaultValueImpl", BindingFlags.Instance | BindingFlags.NonPublic);
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return field.GetValue (pinfo);
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}
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public
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override
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bool IsDefined( Type attributeType, bool inherit) {
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return MonoCustomAttrs.IsDefined (this, attributeType, inherit);
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}
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public override IList<CustomAttributeData> GetCustomAttributesData () {
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return CustomAttributeData.GetCustomAttributes (this);
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}
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[MethodImplAttribute (MethodImplOptions.InternalCall)]
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internal extern int GetMetadataToken ();
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public override Type[] GetOptionalCustomModifiers () => GetCustomModifiers (true);
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internal object[] GetPseudoCustomAttributes ()
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{
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int count = 0;
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if (IsIn)
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count ++;
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if (IsOut)
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count ++;
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if (IsOptional)
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count ++;
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if (marshalAs != null)
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count ++;
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if (count == 0)
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return null;
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object[] attrs = new object [count];
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count = 0;
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if (IsIn)
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attrs [count ++] = new InAttribute ();
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if (IsOut)
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attrs [count ++] = new OutAttribute ();
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if (IsOptional)
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attrs [count ++] = new OptionalAttribute ();
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if (marshalAs != null) {
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#if NETCORE
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throw new NotImplementedException ();
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#else
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attrs [count ++] = marshalAs.Copy ();
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#endif
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}
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return attrs;
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}
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internal CustomAttributeData[] GetPseudoCustomAttributesData ()
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{
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int count = 0;
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if (IsIn)
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count++;
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if (IsOut)
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count++;
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if (IsOptional)
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count++;
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if (marshalAs != null)
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count++;
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if (count == 0)
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return null;
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CustomAttributeData[] attrsData = new CustomAttributeData [count];
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count = 0;
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if (IsIn)
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attrsData [count++] = new CustomAttributeData ((typeof (InAttribute)).GetConstructor (Type.EmptyTypes));
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if (IsOut)
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attrsData [count++] = new CustomAttributeData ((typeof (OutAttribute)).GetConstructor (Type.EmptyTypes));
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if (IsOptional)
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attrsData [count++] = new CustomAttributeData ((typeof (OptionalAttribute)).GetConstructor (Type.EmptyTypes));
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if (marshalAs != null) {
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var ctorArgs = new CustomAttributeTypedArgument[] { new CustomAttributeTypedArgument (typeof (UnmanagedType), marshalAs.Value) };
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attrsData [count++] = new CustomAttributeData (
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(typeof (MarshalAsAttribute)).GetConstructor (new[] { typeof (UnmanagedType) }),
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ctorArgs,
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EmptyArray<CustomAttributeNamedArgument>.Value);//FIXME Get named params
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}
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return attrsData;
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}
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public override Type[] GetRequiredCustomModifiers () => GetCustomModifiers (false);
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public override bool HasDefaultValue {
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get {
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object defaultValue = DefaultValue;
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if (defaultValue == null)
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return true;
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if (defaultValue.GetType () == typeof(DBNull) || defaultValue.GetType () == typeof(Missing))
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return false;
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return true;
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}
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}
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[MethodImplAttribute (MethodImplOptions.InternalCall)]
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internal extern Type[] GetTypeModifiers (bool optional);
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internal static ParameterInfo New (ParameterInfo pinfo, Type type, MemberInfo member, int position)
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{
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return new RuntimeParameterInfo (pinfo, type, member, position);
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}
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internal static ParameterInfo New (ParameterInfo pinfo, MemberInfo member)
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{
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return new RuntimeParameterInfo (pinfo, member);
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}
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internal static ParameterInfo New (Type type, MemberInfo member, MarshalAsAttribute marshalAs)
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{
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return new RuntimeParameterInfo (type, member, marshalAs);
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}
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private Type[] GetCustomModifiers (bool optional) => GetTypeModifiers (optional) ?? Type.EmptyTypes;
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}
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}
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