private void BuildAs(DAsPattern node, Hints hints, CompilerContext ctx)
{
cw.Dup();
BuildPattern(node.Pattern, hints, ctx);
var bad = cw.DefineLabel();
var ok = cw.DefineLabel();
cw.Brfalse(bad);
var sva = -1;
if (!TryGetLocalVariable(node.Name, out var sv))
{
sva = AddVariable(node.Name, node, VarFlags.None);
}
else
{
sva = sv.Address;
}
cw.PopVar(sva);
cw.Push(true);
cw.Br(ok);
cw.MarkLabel(bad);
cw.Pop();
cw.Push(false);
cw.MarkLabel(ok);
cw.Nop();
}
private void PreinitAs(DAsPattern node, Hints hints)
{
PreinitPattern(node.Pattern, hints);
var sva = -1;
if (!TryGetLocalVariable(node.Name, out var sv))
{
sva = AddVariable(node.Name, node, VarFlags.None);
}
else
{
sva = sv.Address;
}
cw.PushNil();
cw.PopVar(sva);
}
