LocalBuilder.cs

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using System;
using System.Reflection.Emit;
 
namespace IKVM.Reflection.Emit
{
 
    internal sealed class LocalBuilder : LocalVariableInfo
    {
 
        readonly MethodBuilder method;
 
        internal LocalBuilder(MethodBuilder method, Type localType, int index, bool pinned) :
            base(index, localType, pinned)
        {
            this.method = method ?? throw new ArgumentNullException(nameof(method));
        }
 
        internal LocalBuilder(MethodBuilder method, Type localType, int index, bool pinned, CustomModifiers customModifiers) :
            base(index, localType, pinned, customModifiers)
        {
            this.method = method ?? throw new ArgumentNullException(nameof(method));
        }
 
        internal MethodBuilder Method => method;
 
        public void SetLocalSymInfo(string name)
        {
            SetLocalSymInfo(name, 0, 0);
        }
 
        public void SetLocalSymInfo(string name, int startOffset, int endOffset)
        {
            var module = method.ModuleBuilder;
            if (method.IsTypeCreated())
                throw new InvalidOperationException("Unable to change after type has been created.");
 
            // generate field signature representing type
            var signature = SignatureHelper.GetFieldSigHelper(module);
            signature.AddArgument(LocalType);
            var array = signature.GetSignature();
 
            int currentActiveScopeIndex = method.GetILGenerator().m_ScopeTree.GetCurrentActiveScopeIndex();
            if (currentActiveScopeIndex == -1)
            {
                method.m_localSymInfo ??= new();
                method.m_localSymInfo.AddLocalSymInfo(name, array, LocalIndex, startOffset, endOffset);
                return;
            }
 
            method.GetILGenerator().m_ScopeTree.AddLocalSymInfoToCurrentScope(name, array, LocalIndex, startOffset, endOffset);
        }
 
    }
 
}