public override Expression VisitRefLocal([NotNull] LogicScriptParser.RefLocalContext context)
{
if (Context.IsInConstant)
{
Context.Errors.AddError("You can only reference constants from other constants", context.Span(), true);
}
var @ref = new ReferenceVisitor(Context).Visit(context);
return(new ReferenceExpression(context.Span(), @ref));
}
public override Statement VisitAssignTruncate([NotNull] LogicScriptParser.AssignTruncateContext context)
{
var @ref = new ReferenceVisitor(Context).Visit(context.reference());
if ([email protected])
{
Context.Errors.AddError("The left hand side of an assignment must be writable", context.reference().Span());
}
var value = new ExpressionVisitor(Context).Visit(context.expression());
return(new AssignStatement(context.Span(), @ref, value, @ref.BitSize));
}
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));
}
