internal static void EmitGetElemSafe(ILGenerator ilg, Symbol array, TypeSymbol elemType)
{
LocalSymbol ls = new LocalSymbol(null, Compilation.Get(NativeType.Int32));
ls.Declare(ilg);
ls.EmitSet(ilg);
var notExist = ilg.DefineLabel();
var exist = ilg.DefineLabel();
array.EmitGet(ilg);
ilg.Emit(OpCodes.Ldlen);
ilg.Emit(OpCodes.Conv_U4);
ls.EmitGet(ilg);
ilg.Emit(OpCodes.Cgt_Un);
ilg.Emit(OpCodes.Brfalse_S, notExist);
array.EmitGet(ilg);
ls.EmitGet(ilg);
ilg.Emit(OpCodes.Ldelem_Ref);
ilg.Emit(OpCodes.Br_S, exist);
ilg.MarkLabel(notExist);
EmitDefault(ilg, elemType);
ilg.MarkLabel(exist);
}
internal override void Emit(Expr expr, TypeSymbol type, ILGenerator ilg)
{
Conversion.Emit(expr, type, ilg);
var loc = new LocalSymbol(Type);
loc.Declare(ilg);
loc.EmitSet(ilg);
Expr = IdExpr.Bound(loc);
}
