public override AstNode VisitPrefix(StannumParser.PrefixContext context)
{
if (!(Visit(context.Operand) is Expr operand))
{
throw new Exception("Unrecognized expression!");
}
return(new UnaryExpr(context.Op.Text, operand));
}
/// <summary>
/// Visit a parse tree produced by the <c>Prefix</c>
/// labeled alternative in <see cref="StannumParser.prefix_"/>.
/// <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 VisitPrefix([NotNull] StannumParser.PrefixContext context)
{
return(VisitChildren(context));
}