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2 | ** |
3 | ** Copyright (C) 2016 The Qt Company Ltd. |
4 | ** Contact: https://www.qt.io/licensing/ |
5 | ** |
6 | ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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38 | ****************************************************************************/ |
39 | |
40 | #include "qbuiltintypes_p.h" |
41 | #include "qcommonsequencetypes_p.h" |
42 | #include "qgenericsequencetype_p.h" |
43 | |
44 | #include "qcontextitem_p.h" |
45 | |
46 | QT_BEGIN_NAMESPACE |
47 | |
48 | using namespace QPatternist; |
49 | |
50 | Item ContextItem::evaluateSingleton(const DynamicContext::Ptr &context) const |
51 | { |
52 | return context->contextItem(); |
53 | } |
54 | |
55 | Expression::Ptr ContextItem::compress(const StaticContext::Ptr &context) |
56 | { |
57 | m_itemType = context->contextItemType(); |
58 | return EmptyContainer::compress(context); |
59 | } |
60 | |
61 | Expression::Ptr ContextItem::typeCheck(const StaticContext::Ptr &context, |
62 | const SequenceType::Ptr &reqType) |
63 | { |
64 | m_itemType = context->contextItemType(); |
65 | return EmptyContainer::typeCheck(context, reqType); |
66 | } |
67 | |
68 | SequenceType::Ptr ContextItem::staticType() const |
69 | { |
70 | /* We test m_itemType here because Patternist View calls staticType() before the typeCheck() |
71 | * stage. */ |
72 | if(m_itemType) |
73 | return makeGenericSequenceType(itemType: m_itemType, cardinality: Cardinality::exactlyOne()); |
74 | else |
75 | return CommonSequenceTypes::ExactlyOneItem; |
76 | } |
77 | |
78 | Expression::Properties ContextItem::properties() const |
79 | { |
80 | return DisableElimination | RequiresContextItem | EvaluationCacheRedundant; |
81 | } |
82 | |
83 | ExpressionVisitorResult::Ptr ContextItem::accept(const ExpressionVisitor::Ptr &visitor) const |
84 | { |
85 | return visitor->visit(this); |
86 | } |
87 | |
88 | Expression::ID ContextItem::id() const |
89 | { |
90 | return IDContextItem; |
91 | } |
92 | |
93 | ItemType::Ptr ContextItem::expectedContextItemType() const |
94 | { |
95 | return BuiltinTypes::item; |
96 | } |
97 | |
98 | const SourceLocationReflection *ContextItem::actualReflection() const |
99 | { |
100 | if(m_expr) |
101 | return m_expr.data(); |
102 | else |
103 | return this; |
104 | } |
105 | |
106 | void ContextItem::announceFocusType(const ItemType::Ptr &type) |
107 | { |
108 | Q_ASSERT(type); |
109 | m_itemType = type; |
110 | } |
111 | |
112 | QT_END_NAMESPACE |
113 |