public override IVecValue VisitUnary([NotNull] VectorizeParser.UnaryContext context)
{
var expr = context.expression();
if (expr is VectorizeParser.VarContext var)
{
var name = var.ID().GetText();
var oldValue = CurrentScope[name];
IVecValue newValue;
switch (context.op.Text)
{
case "++":
newValue = oldValue.Add(VecInt.One);
break;
case "--":
newValue = oldValue.Subtract(VecInt.One);
break;
default:
throw new InvalidOperationException($"Unknown operator '{context.op.Text}'!");
}
CurrentScope[name] = newValue;
return(oldValue);
}
else
{
throw new InvalidOperationException("Increment can only be used with variables!");
}
}
/// <summary>
/// Exit a parse tree produced by the <c>Unary</c>
/// labeled alternative in <see cref="VectorizeParser.expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitUnary([NotNull] VectorizeParser.UnaryContext context)
{
}
/// <summary>
/// Visit a parse tree produced by the <c>Unary</c>
/// labeled alternative in <see cref="VectorizeParser.expression"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitUnary([NotNull] VectorizeParser.UnaryContext context)
{
return(VisitChildren(context));
}
