本文整理汇总了C++中NList::length方法的典型用法代码示例。如果您正苦于以下问题：C++ NList::length方法的具体用法？C++ NList::length怎么用？C++ NList::length使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类NList的用法示例。
在下文中一共展示了NList::length方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1:
/*
~IsRecordTypeList~ checks if the given type list is a record type list.
This is needed in several places like ~In~, ~Out~, ~Save~, ~Open~....
Three type lists a common nowadays:
1 (72 0)
2 ((72 0))
3 ((72 0) ...)
With this information a crosscheck is done with the Secondo catalogue.
*/
bool
Record::IsRecordTypeList(ListExpr typeInfo)
{
bool isRecord = false;
NList list = typeInfo;
#ifdef RECORD_DEBUG
cerr << "Record::IsRecordTypeList(" << nl->ToString(typeInfo) << ")" << endl;
#endif
// check type info list expression, it has to be
// "(72 0)"
// or "((72 0))"
// or "((72 0) ...)"
if (list.length() >= 1) {
// extact the algebra and type id from the given list
int listAlgebraId;
int listTypeId;
if (list.first().isAtom()) {
// case: "(72 0)"
listAlgebraId = list.first().intval();
listTypeId = list.second().intval();
} else {
// case: "((72 0))" or "((72 0) ...)"
listAlgebraId = list.first().first().intval();
listTypeId = list.first().second().intval();
}
// retrieve record ids from secondo cataloge
int scAlgebraId;
int scTypeId;
SecondoCatalog* sc = SecondoSystem::GetCatalog();
sc->GetTypeId(Record::BasicType(), scAlgebraId, scTypeId);
// compare the list ids with secondo record ids
if (listAlgebraId == scAlgebraId && listTypeId == scTypeId) {
isRecord = true;
}
}
return isRecord;
}示例2: values
//.........这里部分代码省略.........
int elemAlgebraId;
int elemTypeId;
Word elemWord;
Attribute* elem;
// iterate synchrone through the type and value list elements
while(typeIter.HasNext() && valueIter.HasNext()) {
// assign the current type list element
NList curType = typeIter.NextNList();
// assign the current value list element
ListExpr curValue;
if (hasValueList) {
curValue = valueIter.NextListExpr();
} else {
curValue = nl->OneElemList(nl->SymbolAtom(nullSymbol));
}
#ifdef RECORD_DEBUG
cerr << "Record::In: curType=" << curType.convertToString() << endl;
cerr << "Record::In: curValue=" << nl->ToString(curValue) << endl;
#endif
// the current type list has to contain 2 elements
// case 1: (string (int int))
// 1. element name
// 2. element type list with two integer values
// 2.1 algebraId
// 2.2 typeId
// case 2: (string ((int int) ...))
// 1. element name
// 2. element type as list, first list item contains
// two integer values
if ( !( curType.length() == 2
&& curType.second().length() == 2
&& curType.second().first().isInt()
&& curType.second().second().isInt())
&& !( curType.length() == 2
&& curType.second().length() > 0
&& curType.second().first().length() == 2
&& curType.second().first().first().isInt()
&& curType.second().first().second().isInt()))
{
#ifdef RECORD_DEBUG
cerr << "Record::In: wrong subtype info" << endl;
#endif
cmsg.inFunError("Record::In: wrong subtype info: " +
curType.convertToString());
return w;
}
// extraxt the element name from current type list element
elemName = curType.first().convertToString();
// extraxt the element type ids from current type list element
if (curType.second().first().isAtom()) {
// case 1
elemAlgebraId = curType.second().first().intval();
elemTypeId = curType.second().second().intval();
} else {
// case 2
elemAlgebraId = curType.second().first().first().intval();
elemTypeId = curType.second().first().second().intval();
}
// retrieve the type name of the ids from secondo catalog