File size: 2,694 Bytes
8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | /* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System.Collections.Generic;
namespace System.Management.Automation.Interpreter
{
#nullable enable
internal interface IInstructionProvider
{
void AddInstructions(LightCompiler compiler);
}
#nullable restore
internal abstract class Instruction
{
public const int UnknownInstrIndex = int.MaxValue;
public virtual int ConsumedStack { get { return 0; } }
public virtual int ProducedStack { get { return 0; } }
public virtual int ConsumedContinuations { get { return 0; } }
public virtual int ProducedContinuations { get { return 0; } }
public int StackBalance
{
get { return ProducedStack - ConsumedStack; }
}
public int ContinuationsBalance
{
get { return ProducedContinuations - ConsumedContinuations; }
}
public abstract int Run(InterpretedFrame frame);
public virtual string InstructionName
{
get { return GetType().Name.Replace("Instruction", string.Empty); }
}
public override string ToString()
{
return InstructionName + "()";
}
public virtual string ToDebugString(int instructionIndex, object cookie, Func<int, int> labelIndexer, IList<object> objects)
{
return ToString();
}
public virtual object GetDebugCookie(LightCompiler compiler)
{
return null;
}
}
internal sealed class NotInstruction : Instruction
{
public static readonly Instruction Instance = new NotInstruction();
private NotInstruction() { }
public override int ConsumedStack { get { return 1; } }
public override int ProducedStack { get { return 1; } }
public override int Run(InterpretedFrame frame)
{
frame.Push((bool)frame.Pop() ? ScriptingRuntimeHelpers.False : ScriptingRuntimeHelpers.True);
return +1;
}
}
}
|