Interpreter.cs

Go to the documentation of this file.

using System.Collections.Generic;
using System.Runtime.CompilerServices;
 
namespace System.Linq.Expressions.Interpreter;
 
internal sealed class Interpreter
{
    internal static readonly object NoValue = new object();
 
    private readonly InstructionArray _instructions;
 
    internal readonly object[] _objects;
 
    internal readonly RuntimeLabel[] _labels;
 
    internal readonly DebugInfo[] _debugInfos;
 
    internal string Name { get; }
 
    internal int LocalCount { get; }
 
    internal int ClosureSize => ClosureVariables?.Count ?? 0;
 
    internal InstructionArray Instructions => _instructions;
 
    internal Dictionary<ParameterExpression, LocalVariable> ClosureVariables { get; }
 
    internal Interpreter(string name, LocalVariables locals, InstructionArray instructions, DebugInfo[] debugInfos)
    {
        Name = name;
        LocalCount = locals.LocalCount;
        ClosureVariables = locals.ClosureVariables;
        _instructions = instructions;
        _objects = instructions.Objects;
        _labels = instructions.Labels;
        _debugInfos = debugInfos;
    }
 
    [MethodImpl(MethodImplOptions.NoInlining)]
    public void Run(InterpretedFrame frame)
    {
        Instruction[] instructions = _instructions.Instructions;
        for (int num = frame.InstructionIndex; num < instructions.Length; num = (frame.InstructionIndex = num + instructions[num].Run(frame)))
        {
        }
    }
}