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// ==========================================================================
// This software is subject to the provisions of the Zope Public License,
// Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
// FOR A PARTICULAR PURPOSE.
// ==========================================================================
using System;
namespace Python.Runtime {
/// <summary>
/// Represents a Python tuple object. See the documentation at
/// http://www.python.org/doc/current/api/tupleObjects.html for details.
/// </summary>
public class PyTuple : PySequence {
/// <summary>
/// PyTuple Constructor
/// </summary>
///
/// <remarks>
/// Creates a new PyTuple from an existing object reference. Note
/// that the instance assumes ownership of the object reference.
/// The object reference is not checked for type-correctness.
/// </remarks>
public PyTuple(IntPtr ptr) : base(ptr) {}
/// <summary>
/// PyTuple Constructor
/// </summary>
///
/// <remarks>
/// Copy constructor - obtain a PyTuple from a generic PyObject. An
/// ArgumentException will be thrown if the given object is not a
/// Python tuple object.
/// </remarks>
public PyTuple(PyObject o) : base() {
if (!IsTupleType(o)) {
throw new ArgumentException("object is not a tuple");
}
Runtime.Incref(o.obj);
obj = o.obj;
}
/// <summary>
/// PyTuple Constructor
/// </summary>
///
/// <remarks>
/// Creates a new empty PyTuple.
/// </remarks>
public PyTuple() : base() {
obj = Runtime.PyTuple_New(0);
if (obj == IntPtr.Zero) {
throw new PythonException();
}
}
/// <summary>
/// PyTuple Constructor
/// </summary>
///
/// <remarks>
/// Creates a new PyTuple from an array of PyObject instances.
/// </remarks>
public PyTuple(PyObject[] items) : base() {
int count = items.Length;
obj = Runtime.PyTuple_New(count);
for (int i = 0; i < count; i++) {
IntPtr ptr = items[i].obj;
Runtime.Incref(ptr);
int r = Runtime.PyTuple_SetItem(obj, i, ptr);
if (r < 0) {
throw new PythonException();
}
}
}
/// <summary>
/// IsTupleType Method
/// </summary>
///
/// <remarks>
/// Returns true if the given object is a Python tuple.
/// </remarks>
public static bool IsTupleType(PyObject value) {
return Runtime.PyTuple_Check(value.obj);
}
/// <summary>
/// AsTuple Method
/// </summary>
///
/// <remarks>
/// Convert a Python object to a Python tuple if possible, raising
/// a PythonException if the conversion is not possible. This is
/// equivalent to the Python expression "tuple(object)".
/// </remarks>
public static PyTuple AsTuple(PyObject value) {
IntPtr op = Runtime.PySequence_Tuple(value.obj);
if (op == IntPtr.Zero) {
throw new PythonException();
}
return new PyTuple(op);
}
}
}