public override Reference VisitRefPort([NotNull] LogicScriptParser.RefPortContext context)
{
var identName = context.IDENT().GetText();
PortInfo port;
MachinePorts?target =
Context.Outer.Script.Inputs.TryGetValue(identName, out port) ? MachinePorts.Input
: Context.Outer.Script.Outputs.TryGetValue(identName, out port) ? MachinePorts.Output
: Context.Outer.Script.Registers.TryGetValue(identName, out port) ? MachinePorts.Register
: null;
if (target == null)
{
Context.Errors.AddError($"Unknown identifier '{identName}'", new SourceSpan(context.IDENT().Symbol), isFatal: true);
}
return(new PortReference(context.Span(), port));
}
public override Expression VisitRefPort([NotNull] LogicScriptParser.RefPortContext context)
{
if (Context.Outer.Constants.TryGetValue(context.GetText(), out var val))
{
return(val);
}
if (Context.IsInConstant)
{
Context.Errors.AddError("You can only reference constants from other constants", context.Span(), true);
}
var @ref = new ReferenceVisitor(Context).Visit(context);
if ([email protected])
{
Context.Errors.AddError("An identifier in an expression must be readable", context.Span());
}
return(new ReferenceExpression(context.Span(), @ref));
}
