- public interface ParameterData {
- Type ParameterType (int pos);
- Type [] Types { get; }
- int Count { get; }
- Type ExtensionMethodType { get; }
- bool HasParams { get; }
- string ParameterName (int pos);
- string ParameterDesc (int pos);
-
- Parameter.Modifier ParameterModifier (int pos);
- string GetSignatureForError ();
-
-#if MS_COMPATIBLE
- ParameterData InflateTypes (Type[] genArguments, Type[] argTypes);
-#endif
- }
-
- public class ReflectionParameters : ParameterData {
- ParameterInfo [] pi;
- Type [] types;
- int params_idx = int.MaxValue;
- bool is_varargs;
- bool is_extension;
- ParameterData gpd;
-
- public ReflectionParameters (MethodBase mb)
- {
- ParameterInfo [] pi = mb.GetParameters ();
- is_varargs = (mb.CallingConvention & CallingConventions.VarArgs) != 0;
-
- this.pi = pi;
- int count = pi.Length;
-
- if (count == 0) {
- types = Type.EmptyTypes;
- return;
- }
-
- types = new Type [count];
- for (int i = 0; i < count; i++)
- types [i] = TypeManager.TypeToCoreType (pi [i].ParameterType);
-
- // TODO: This (if) should be done one level higher to correctly use
- // out caching facilities.
- MethodBase generic = TypeManager.DropGenericMethodArguments (mb);
- if (generic != mb) {
- gpd = TypeManager.GetParameterData (generic);
- if (gpd.HasParams) {
- for (int i = gpd.Count; i != 0; --i) {
- if ((gpd.ParameterModifier (i-1) & Parameter.Modifier.PARAMS) != 0) {
- this.params_idx = i-1;
- break;
- }
- }
- }
- return;
- }
-
- //
- // So far, the params attribute can be used in C# for the last
- // and next to last method parameters.
- // If some other language can place it anywhere we will
- // have to analyze all parameters and not just last 2.
- //
- --count;
- for (int i = count; i >= 0 && i > count - 2; --i) {
- if (!pi [i].ParameterType.IsArray)
- continue;
-
- if (pi [i].IsDefined (TypeManager.param_array_type, false)) {
- params_idx = i;
- break;
- }
- }
-
- if (TypeManager.extension_attribute_type != null && mb.IsStatic &&
- (mb.DeclaringType.Attributes & Class.StaticClassAttribute) == Class.StaticClassAttribute &&
- mb.IsDefined (TypeManager.extension_attribute_type, false))
- is_extension = true;
- }
-
- public override bool Equals (object obj)
- {
- ReflectionParameters rp = obj as ReflectionParameters;
- if (rp == null)
- return false;
-
- if (Count != rp.Count)
- return false;
-
- for (int i = 0; i < Count; ++i) {
- if (!types [i].Equals (rp.types [i]))
- return false;
- }
- return true;
- }
-
- public override int GetHashCode ()
- {
- return base.GetHashCode ();
- }
-
- public string GetSignatureForError ()
- {
- StringBuilder sb = new StringBuilder ("(");
- for (int i = 0; i < pi.Length; ++i) {
- if (i != 0)
- sb.Append (", ");
- sb.Append (ParameterDesc (i));
- }
- if (is_varargs) {
- if (pi.Length > 0)
- sb.Append (", ");
- sb.Append ("__arglist");
- }
- sb.Append (')');
- return sb.ToString ();
- }
-
-#if MS_COMPATIBLE
- public ParameterData InflateTypes (Type[] genArguments, Type[] argTypes)
- {
- ReflectionParameters p = (ReflectionParameters)MemberwiseClone ();
-
- for (int i = 0; i < types.Length; ++i) {
- if (types[i].IsGenericParameter) {
- for (int ii = 0; ii < genArguments.Length; ++ii) {
- if (types[i] != genArguments[ii])
- continue;
-
- p.types[i] = argTypes[ii];
- break;
- }
- continue;
- }
-
- if (types[i].IsGenericType) {
- Type[] gen_arguments_open = types[i].GetGenericTypeDefinition ().GetGenericArguments ();
- Type[] gen_arguments = types[i].GetGenericArguments ();
- for (int ii = 0; ii < gen_arguments_open.Length; ++ii) {
- if (gen_arguments [ii].IsGenericParameter) {
- for (int iii = 0; iii < genArguments.Length; ++iii) {
- if (gen_arguments [ii] != genArguments [iii])
- continue;
-
- gen_arguments_open [ii] = argTypes [iii];
- break;
- }
- } else {
- gen_arguments_open [ii] = gen_arguments [ii];
- }
- }
-
- p.types[i] = types[i].GetGenericTypeDefinition ().MakeGenericType (gen_arguments_open);
- }
- }
- return p;
- }