| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** General Public License version 3 as published by the Free Software |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| |
| #include "qcontextitem_p.h" |
| #include "qcommonsequencetypes_p.h" |
| #include "qemptysequence_p.h" |
| #include "qfunctionsignature_p.h" |
| #include "qgenericsequencetype_p.h" |
| #include "qcollationchecker_p.h" |
| #include "qcommonnamespaces_p.h" |
| |
| #include "qfunctioncall_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| using namespace QPatternist; |
| |
| SequenceType::List FunctionCall::expectedOperandTypes() const |
| { |
| const FunctionArgument::List args(signature()->arguments()); |
| FunctionArgument::List::const_iterator it(args.constBegin()); |
| const FunctionArgument::List::const_iterator end(args.constEnd()); |
| // TODO reserve/resize() |
| SequenceType::List result; |
| |
| for(; it != end; ++it) |
| result.append((*it)->type()); |
| |
| return result; |
| } |
| |
| Expression::Ptr FunctionCall::typeCheck(const StaticContext::Ptr &context, |
| const SequenceType::Ptr &reqType) |
| { |
| /* We don't cache properties() at some stages because it can be invalidated |
| * by the typeCheck(). */ |
| |
| const FunctionSignature::Arity maxArgs = signature()->maximumArguments(); |
| /* We do this before the typeCheck() such that the appropriate conversions |
| * are applied to the ContextItem. */ |
| if(m_operands.count() < maxArgs && |
| has(UseContextItem)) |
| { |
| m_operands.append(Expression::Ptr(new ContextItem())); |
| context->wrapExpressionWith(this, m_operands.last()); |
| } |
| |
| const Expression::Ptr me(UnlimitedContainer::typeCheck(context, reqType)); |
| if(me != this) |
| return me; |
| |
| const Properties props(properties()); |
| |
| if(props.testFlag(RewriteToEmptyOnEmpty) && |
| *CommonSequenceTypes::Empty == *m_operands.first()->staticType()->itemType()) |
| { |
| return EmptySequence::create(this, context); |
| } |
| |
| if(props.testFlag(LastOperandIsCollation) && |
| m_operands.count() == maxArgs) |
| { |
| m_operands.last() = Expression::Ptr(new CollationChecker(m_operands.last())); |
| context->wrapExpressionWith(this, m_operands.last()); |
| } |
| |
| return me; |
| } |
| |
| void FunctionCall::setSignature(const FunctionSignature::Ptr &sign) |
| { |
| m_signature = sign; |
| } |
| |
| FunctionSignature::Ptr FunctionCall::signature() const |
| { |
| Q_ASSERT(m_signature); /* It really should be set. */ |
| return m_signature; |
| } |
| |
| SequenceType::Ptr FunctionCall::staticType() const |
| { |
| Q_ASSERT(m_signature); |
| if(has(EmptynessFollowsChild)) |
| { |
| if(m_operands.isEmpty()) |
| { |
| /* This is a function which uses the context item when having no arguments. */ |
| return signature()->returnType(); |
| } |
| const Cardinality card(m_operands.first()->staticType()->cardinality()); |
| if(card.allowsEmpty()) |
| return signature()->returnType(); |
| else |
| { |
| /* Remove empty. */ |
| return makeGenericSequenceType(signature()->returnType()->itemType(), |
| card & Cardinality::oneOrMore()); |
| } |
| } |
| return signature()->returnType(); |
| } |
| |
| Expression::Properties FunctionCall::properties() const |
| { |
| Q_ASSERT(m_signature); |
| return signature()->properties(); |
| } |
| |
| ExpressionVisitorResult::Ptr FunctionCall::accept(const ExpressionVisitor::Ptr &visitor) const |
| { |
| return visitor->visit(this); |
| } |
| |
| Expression::ID FunctionCall::id() const |
| { |
| Q_ASSERT(m_signature); |
| return m_signature->id(); |
| } |
| |
| QT_END_NAMESPACE |