public override object VisitIfStatement([NotNull] ChessVCParser.IfStatementContext context)
{
object conditional = deref(Visit(context.expression()));
if (!(conditional is bool))
{
throw new Exception("if-statement conditional not boolean: " + conditional.ToString());
}
if ((bool)conditional)
{
return(Visit(context.ifBody(0)));
}
else if (context.el != null)
{
return(Visit(context.ifBody(1)));
}
// the if is false and there is no else so return null
return(null);
}
/// <summary>
/// Visit a parse tree produced by the <c>ifStatement</c>
/// labeled alternative in <see cref="ChessVCParser.simpleEmbeddedStatement"/>.
/// <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 VisitIfStatement([NotNull] ChessVCParser.IfStatementContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by the <c>ifStatement</c>
/// labeled alternative in <see cref="ChessVCParser.simpleEmbeddedStatement"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitIfStatement([NotNull] ChessVCParser.IfStatementContext context)
{
}
