public IList <CilInstruction> VisitUnboxToVmExpression(CilUnboxToVmExpression expression)
{
var result = new List <CilInstruction>(expression.Expression.AcceptVisitor(this));
if (expression.Type.IsTypeOf("System", "Object"))
{
var convertMethod = _context.VmHelperType.Methods.First(x =>
x.Name == nameof(VmHelper.ConvertToVmType) &&
x.Parameters.Count == 1);
result.Add(CilInstruction.Create(CilOpCodes.Call, convertMethod));
}
else
{
var convertMethod = _context.VmHelperType.Methods.First(x =>
x.Name == nameof(VmHelper.ConvertToVmType) &&
x.Parameters.Count == 2);
var typeFromHandle = _context.ReferenceImporter.ImportMethod(typeof(Type).GetMethod("GetTypeFromHandle"));
result.AddRange(new[]
{
CilInstruction.Create(CilOpCodes.Ldtoken, expression.Type),
CilInstruction.Create(CilOpCodes.Call, typeFromHandle),
CilInstruction.Create(CilOpCodes.Call, convertMethod),
});
}
return(result);
}
public override bool VisitUnboxToVmExpression(CilUnboxToVmExpression expression)
{
var argument = expression.Expression;
if (!expression.ExpectedType.IsValueType ||
expression.ExpectedType.FullName == argument.ExpressionType.FullName)
{
argument.ExpectedType = expression.ExpectedType;
expression.ReplaceWith(argument.Remove());
argument.AcceptVisitor(this);
return(true);
}
return(base.VisitUnboxToVmExpression(expression));
}
public IList <CilInstruction> VisitUnboxToVmExpression(CilUnboxToVmExpression expression)
{
var convertMethod = _context.VmHelperType.Methods.First(x => x.Name == nameof(VmHelper.ConvertToVmType));
var result = new List <CilInstruction>(expression.Expression.AcceptVisitor(this));
if (expression.Type.IsTypeOf("System", "Object"))
{
var getType = _context.ReferenceImporter.ImportMethod(typeof(object).GetMethod("GetType"));
var endif = CilInstruction.Create(CilOpCodes.Nop);
var @else = CilInstruction.Create(CilOpCodes.Nop);
result.AddRange(new[]
{
CilInstruction.Create(CilOpCodes.Dup),
CilInstruction.Create(CilOpCodes.Brtrue_S, @else),
CilInstruction.Create(CilOpCodes.Pop),
CilInstruction.Create(CilOpCodes.Ldnull),
CilInstruction.Create(CilOpCodes.Br_S, endif),
@else,
CilInstruction.Create(CilOpCodes.Dup),
CilInstruction.Create(CilOpCodes.Callvirt, getType),
CilInstruction.Create(CilOpCodes.Call, convertMethod),
endif
});
}
else
{
var typeFromHandle = _context.ReferenceImporter.ImportMethod(typeof(Type).GetMethod("GetTypeFromHandle"));
result.AddRange(new[]
{
CilInstruction.Create(CilOpCodes.Ldtoken, expression.Type),
CilInstruction.Create(CilOpCodes.Call, typeFromHandle),
CilInstruction.Create(CilOpCodes.Call, convertMethod),
});
}
return(result);
}
public string VisitUnboxToVmExpression(CilUnboxToVmExpression expression) => $"unbox.tovm {expression.Type}";
public virtual bool VisitUnboxToVmExpression(CilUnboxToVmExpression expression)
{
return(expression.Expression.AcceptVisitor(this));
}
public void VisitUnboxToVmExpression(CilUnboxToVmExpression expression)
{
expression.Expression.AcceptVisitor(this);
}
