public override double VisitUnaryExpression([NotNull] HelloParser.UnaryExpressionContext context)
{
double postfix = VisitPostfixExpression(context.postfixExpression());
if (context.unaryOperator() != null)
{
switch (context.unaryOperator().Start.Text)
{
case "-":
postfix = -postfix;
break;
}
}
return(postfix);
}
/// <summary>
/// Exit a parse tree produced by <see cref="HelloParser.unaryExpression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitUnaryExpression([NotNull] HelloParser.UnaryExpressionContext context)
{
}
/// <summary>
/// Visit a parse tree produced by <see cref="HelloParser.unaryExpression"/>.
/// <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 VisitUnaryExpression([NotNull] HelloParser.UnaryExpressionContext context)
{
return(VisitChildren(context));
}