public override Calc_node VisitLog_exp([NotNull] CalcParser.Log_expContext context)
{
// 生成 log 节点
Binary_node node = new Binary_node();
node.op = Binary_node.Operator.LOG;
if (context.children[2] is CalcParser.ExpContext)
{
node.node1 = Visit(context.children[2]);
if (context.children[4] is CalcParser.ExpContext)
{
node.node2 = Visit(context.children[4]);
}
else
{
node.node2 = null;
}
}
else
{
node.node1 = null;
if (context.exp(0) != null)
{
node.node2 = Visit(context.exp(0));
}
else
{
node.node2 = null;
}
}
//node.node1 = Visit(context.exp(0)),
//node.node2 = Visit(context.exp(1))
return(node);
}
/// <summary>
/// Visit a parse tree produced by <see cref="CalcParser.log_exp"/>.
/// <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 VisitLog_exp([NotNull] CalcParser.Log_expContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Enter a parse tree produced by <see cref="CalcParser.log_exp"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void EnterLog_exp([NotNull] CalcParser.Log_expContext context)
{
}