public override object VisitIfStmt([NotNull] CalculatorParser.IfStmtContext context)
{
var exprs = context.expression();
var blocks = context.block();
object result = null;
bool hasElse = blocks.Length - exprs.Length == 1;
bool condition = Convert.ToBoolean(context.expression()[0].Accept(this));
if (condition)
{
result = context.block()[0].Accept(this);
return(result);
}
for (int i = 1; i < (hasElse ? exprs.Length - 1 : exprs.Length); i++)
{
condition = Convert.ToBoolean(context.expression()[i].Accept(this));
if (condition)
{
result = context.block()[i].Accept(this);
return(result);
}
}
if (hasElse)
{
result = context.block()[context.block().Length - 1].Accept(this);
}
return(result);
}
/// <summary>
/// Visit a parse tree produced by <see cref="CalculatorParser.ifStmt"/>.
/// <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 VisitIfStmt([NotNull] CalculatorParser.IfStmtContext context)
{
return(VisitChildren(context));
}
