public static ZilResult EXPAND([NotNull] Context ctx, [NotNull] ZilObject value)
{
var result = value.Expand(ctx);
if (result.ShouldPass())
{
return(result);
}
if ((ZilObject)result == value)
{
result = value.Eval(ctx);
}
return(result);
}
public static ZilObject Unwrap([NotNull] this ZilObject zo, [NotNull] Context ctx)
{
var src = zo.SourceLine;
using (DiagnosticContext.Push(src))
{
while (true)
{
zo = (ZilObject)zo.Expand(ctx);
switch (zo)
{
case ZilForm form when form.IsEmpty:
return(ctx.FALSE);
case ZilAdecl adecl:
// TODO: check DECL
zo = adecl.First;
break;
case IMayExpandAfterEvaluation expandAfter when expandAfter.ShouldExpandAfterEvaluation:
// TODO: don't use Parse here
zo = expandAfter.ExpandAfterEvaluation()
.FirstOrCombine(zos =>
Program.Parse(ctx, src, "<BIND () {0:SPLICE}>", new ZilList(zos))
.Single());
break;
case ZilMacroResult macroResult:
zo = macroResult.Inner;
break;
default:
return(zo);
}
}
}
}
