84 lines
3.2 KiB
C#
84 lines
3.2 KiB
C#
// ==========================================================================
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// This software is subject to the provisions of the Zope Public License,
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// Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
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// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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// FOR A PARTICULAR PURPOSE.
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// ==========================================================================
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using System;
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using System.Reflection;
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namespace Python.Runtime {
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//========================================================================
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// Implements the __overloads__ attribute of method objects. This object
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// supports the [] syntax to explicitly select an overload by signature.
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//========================================================================
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internal class OverloadMapper : ExtensionType {
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MethodObject m;
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IntPtr target;
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public OverloadMapper(MethodObject m, IntPtr target) : base() {
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Runtime.Incref(target);
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this.target = target;
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this.m = m;
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}
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//====================================================================
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// Implement explicit overload selection using subscript syntax ([]).
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//====================================================================
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public static IntPtr mp_subscript(IntPtr tp, IntPtr idx) {
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OverloadMapper self = (OverloadMapper)GetManagedObject(tp);
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// Note: if the type provides a non-generic method with N args
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// and a generic method that takes N params, then we always
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// prefer the non-generic version in doing overload selection.
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Type[] types = Runtime.PythonArgsToTypeArray(idx);
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if (types == null) {
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return Exceptions.RaiseTypeError("type(s) expected");
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}
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MethodInfo mi = MethodBinder.MatchSignature(self.m.info, types);
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if (mi == null) {
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string e = "No match found for signature";
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return Exceptions.RaiseTypeError(e);
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}
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MethodBinding mb = new MethodBinding(self.m, self.target);
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mb.info = mi;
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Runtime.Incref(mb.pyHandle);
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return mb.pyHandle;
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}
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//====================================================================
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// OverloadMapper __repr__ implementation.
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//====================================================================
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public static IntPtr tp_repr(IntPtr op) {
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OverloadMapper self = (OverloadMapper)GetManagedObject(op);
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IntPtr doc = self.m.GetDocString();
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Runtime.Incref(doc);
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return doc;
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}
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//====================================================================
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// OverloadMapper dealloc implementation.
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//====================================================================
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public static new void tp_dealloc(IntPtr ob) {
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OverloadMapper self = (OverloadMapper)GetManagedObject(ob);
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Runtime.Decref(self.target);
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ExtensionType.FinalizeObject(self);
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}
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}
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}
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