public final class List extends Arr
Constructor and Description |
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List(InputInfo info,
Expr... exprs)
Constructor.
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Modifier and Type | Method and Description |
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void |
checkUp()
Checks if all updating expressions are correctly placed.
|
Expr |
compile(QueryContext qc,
VarScope scp)
Compiles and optimizes the expression, assigns types and cardinalities.
|
Expr |
copy(QueryContext qc,
VarScope scp,
IntObjMap<Var> vs)
Copies an expression.
|
boolean |
isVacuous()
Tests if this is a vacuous expression (empty sequence or error function).
|
Iter |
iter(QueryContext qc)
Evaluates the expression and returns an iterator on the resulting items.
|
Expr |
optimize(QueryContext qc,
VarScope scp)
Optimizes an already compiled expression without recompiling its sub-expressions.
|
String |
toString() |
Value |
value(QueryContext qc)
Evaluates the expression and returns the resulting value.
|
accept, allAreValues, copyAll, count, exprSize, has, inline, oneIsEmpty, plan, removable, toString
atomItem, atomValue, checkAtomic, checkNoEmpty, checkNoEmpty, checkNoneUp, checkNoUp, checkType, compBln, copyType, ctxValue, ebv, item, optPre, optPre, preEval, seqType, seqType, size, test, toArray, toArray, toAtomItem, toB64, toB64, toBin, toBin, toBoolean, toBoolean, toBytes, toBytes, toDouble, toDouble, toElem, toEmptyNode, toEmptyToken, toFloat, toFunc, toItem, toLong, toLong, toMap, toMap, toNode, toNode, toNumber, toQNm, toQNm, toToken, toToken
atomIter, data, hasFreeVars, indexAccessible, inlineAll, isEmpty, isFunction, isValue, iterable, markTailCalls, optimizeEbv, sameAs, typeCheck, uses, visitAll
addPlan, addPlan, description, planAttr, planElem, toErrorString
public void checkUp() throws QueryException
Expr
checkUp
in class Arr
QueryException
- query exceptionpublic Expr compile(QueryContext qc, VarScope scp) throws QueryException
Expr
QueryContext.compile()
.compile
in class Arr
qc
- query contextscp
- variable scopeQueryException
- query exceptionpublic Expr optimize(QueryContext qc, VarScope scp) throws QueryException
Expr
optimize
in class Expr
qc
- query contextscp
- variable scopeQueryException
- query exceptionpublic Iter iter(QueryContext qc)
Expr
Expr.item(QueryContext, InputInfo)
must be implemented
by an expression, as it may be called by this method.public Value value(QueryContext qc) throws QueryException
Expr
value
in class ParseExpr
qc
- query contextQueryException
- query exceptionpublic Expr copy(QueryContext qc, VarScope scp, IntObjMap<Var> vs)
Expr
public boolean isVacuous()
Expr
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