- public interface ParameterData {
- Type ParameterType (int pos);
- Type [] Types { get; }
- int Count { get; }
- bool HasParams { get; }
- string ParameterName (int pos);
- string ParameterDesc (int pos);
- Parameter.Modifier ParameterModifier (int pos);
- string GetSignatureForError ();
- }
-
- public class ReflectionParameters : ParameterData {
- ParameterInfo [] pi;
- Type [] types;
- int params_idx = -1;
- bool is_varargs;
- 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] = 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;
-
- object [] attrs = pi [i].GetCustomAttributes (TypeManager.param_array_type, true);
- if (attrs.Length == 1) {
- params_idx = i;
- return;
- }
- }
- }
-
- 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 ();
- }
-
- public Type ParameterType (int pos)
- {
- if (is_varargs && pos >= pi.Length)
- return TypeManager.runtime_argument_handle_type;
-
- return pi [pos].ParameterType;
- }