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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Microsoft Public License. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Microsoft Public License, please send an email to
* ironruby@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Microsoft Public License.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using EachSite = System.Func<System.Runtime.CompilerServices.CallSite, object, IronRuby.Builtins.Proc, object>;
using EnumerableModule = IronRuby.Builtins.Enumerable;
using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using IronRuby.Builtins;
using IronRuby.Runtime;
using IronRuby.Runtime.Calls;
using Microsoft.Scripting;
using Microsoft.Scripting.Utils;
using Microsoft.Scripting.Runtime;
namespace IronRuby.StandardLibrary.Enumerator {
[RubyModule(Extends = typeof(Kernel))]
public static class EnumerableKernelOps {
[RubyMethod("to_enum")]
[RubyMethod("enum_for")]
public static Enumerable.Enumerator/*!*/ Create(object self, [DefaultProtocol, Optional]string enumeratorName,
[NotNull]params object[] targetParameters) {
return new Enumerable.Enumerator(self, enumeratorName, targetParameters);
}
}
[RubyModule("Enumerable", Extends = typeof(EnumerableModule))]
public static class Enumerable {
#region Enumerator class
/// <summary>
/// A wrapper that provides "each" method for an arbitrary object.
/// A call to "each" on the instance of Enumerator is forwarded to a call to a method of a given name on the wrapped object.
/// </summary>
[RubyClass("Enumerator"), Includes(typeof(EnumerableModule))]
public class Enumerator {
private object _targetObject;
private string/*!*/ _targetName;
private object[] _targetArguments;
public Enumerator()
: this(null, null, null) {
}
public Enumerator(object targetObject, string targetName, params object[] targetArguments) {
Reinitialize(this, targetObject, targetName, targetArguments);
}
[RubyConstructor]
public static Enumerator/*!*/ Create(RubyClass/*!*/ self, object targetObject) {
return Reinitialize(new Enumerator(), targetObject, null, ArrayUtils.EmptyObjects);
}
[RubyConstructor]
public static Enumerator/*!*/ Create(RubyClass/*!*/ self, object targetObject, [DefaultProtocol]string targetName,
[NotNull]params object[] targetArguments) {
return Reinitialize(new Enumerator(), targetObject, targetName, targetArguments);
}
[RubyMethod("initialize", RubyMethodAttributes.PrivateInstance)]
public static Enumerator/*!*/ Reinitialize(Enumerator/*!*/ self, object targetObject) {
return Reinitialize(self, targetObject, null, ArrayUtils.EmptyObjects);
}
[RubyMethod("initialize", RubyMethodAttributes.PrivateInstance)]
public static Enumerator/*!*/ Reinitialize(Enumerator/*!*/ self, object targetObject, [DefaultProtocol]string targetName,
[NotNull]params object[] targetArguments) {
self._targetObject = targetObject;
self._targetName = targetName ?? "each";
self._targetArguments = targetArguments;
return self;
}
[RubyMethod("each")]
public static object Each(RubyScope/*!*/ scope, BlockParam/*!*/ block, Enumerator/*!*/ self) {
// MRI doesn't send "send" message:
return KernelOps.SendMessageOpt(scope, block, self._targetObject, self._targetName, self._targetArguments);
}
// TODO: 1.9:
// with_index
// next
// rewind
}
#endregion
#region each_cons, each_slice
[RubyMethod("each_cons")]
public static object EachCons(CallSiteStorage<EachSite>/*!*/ each, BlockParam/*!*/ block, object self, [DefaultProtocol]int sliceSize) {
return EachSlice(each, block, self, sliceSize, false, (slice) => {
RubyArray newSlice = new RubyArray(slice.Count);
for (int i = 1; i < slice.Count; i++) {
newSlice.Add(slice[i]);
}
return newSlice;
});
}
[RubyMethod("each_slice")]
public static object EachSlice(CallSiteStorage<EachSite>/*!*/ each, BlockParam/*!*/ block, object self, [DefaultProtocol]int sliceSize) {
return EachSlice(each, block, self, sliceSize, true, (slice) => null);
}
private static object EachSlice(CallSiteStorage<EachSite>/*!*/ each, BlockParam/*!*/ block, object self, int sliceSize,
bool includeIncomplete, Func<RubyArray/*!*/, RubyArray>/*!*/ newSliceFactory) {
if (sliceSize <= 0) {
throw RubyExceptions.CreateArgumentError("invalid slice size");
}
RubyArray slice = null;
EnumerableModule.Each(each, self, Proc.Create(each.Context, delegate(BlockParam/*!*/ selfBlock, object _, object item) {
if (slice == null) {
slice = new RubyArray(sliceSize);
}
slice.Add(item);
if (slice.Count == sliceSize) {
if (block == null) {
throw RubyExceptions.NoBlockGiven();
}
var completeSlice = slice;
slice = newSliceFactory(slice);
object blockResult;
if (block.Yield(completeSlice, out blockResult)) {
return blockResult;
}
}
return null;
}));
if (slice != null && includeIncomplete) {
if (block == null) {
throw RubyExceptions.NoBlockGiven();
}
object blockResult;
if (block.Yield(slice, out blockResult)) {
return blockResult;
}
}
return null;
}
#endregion
#region enum_cons, enum_slice, enum_with_index
[RubyMethod("enum_cons")]
public static Enumerator/*!*/ GetConsEnumerator(object self, [DefaultProtocol]int sliceSize) {
return new Enumerator(self, "each_cons", sliceSize);
}
[RubyMethod("enum_slice")]
public static Enumerator/*!*/ GetSliceEnumerator(object self, [DefaultProtocol]int sliceSize) {
return new Enumerator(self, "each_slice", sliceSize);
}
[RubyMethod("enum_with_index")]
public static Enumerator/*!*/ GetEnumeratorWithIndex(object self) {
return new Enumerator(self, "each_with_index", null);
}
#endregion
}
}
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