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3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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6 ** This file is part of the QtXmlPatterns module of the Qt Toolkit.
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21 ** GNU General Public License Usage
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40 ****************************************************************************/
42 #include "qcallsite_p.h"
44 #include "qcalltargetdescription_p.h"
48 using namespace QPatternist;
50 CallTargetDescription::CallTargetDescription(const QXmlName &name) : m_name(name)
52 Q_ASSERT(!m_name.isNull());
55 QXmlName CallTargetDescription::name() const
60 void CallTargetDescription::checkArgumentsCircularity(CallTargetDescription::List &signList,
61 const Expression::Ptr callsite)
63 /* Check the arguments. */
64 const Expression::List ops(callsite->operands());
65 const Expression::List::const_iterator end(ops.constEnd());
66 Expression::List::const_iterator it(ops.constBegin());
68 for(; it != end; ++it)
69 checkCallsiteCircularity(signList, *it);
72 void CallTargetDescription::checkCallsiteCircularity(CallTargetDescription::List &signList,
73 const Expression::Ptr expr)
77 if(expr->is(Expression::IDUserFunctionCallsite))
79 CallTargetDescription::List::const_iterator it(signList.constBegin());
80 const CallTargetDescription::List::const_iterator end(signList.constEnd());
81 CallSite *const callsite = static_cast<CallSite *>(expr.data());
83 for(; it != end; ++it)
85 if(callsite->configureRecursion(*it))
87 /* A callsite inside the function body to the function. This user function
88 * is recursive if it's to the same function, in other words. Which it was
89 * if configureRecursion() returned true. */
91 /* Now we continue and check the arguments of the callsite. That is, the arguments.
92 * This catches for instance local:foo(local:foo(3)). */
93 checkArgumentsCircularity(signList, expr);
97 /* Check the body of the function so this callsite isn't "indirectly" a
98 * recursive call to the function we're checking. XQTS test case
99 * default_namespace-011 is an example of this. */
100 signList.append(callsite->callTargetDescription());
101 checkCallsiteCircularity(signList, callsite->body());
104 checkArgumentsCircularity(signList, expr); /* We're done in this case. */