SequenceType::Ptr FirstItemPredicate::staticType() const { const SequenceType::Ptr t(m_operand->staticType()); return makeGenericSequenceType(t->itemType(), t->cardinality().toWithoutMany()); }
SequenceType::Ptr GenericPredicate::staticType() const { const SequenceType::Ptr type(m_operand1->staticType()); return makeGenericSequenceType(type->itemType(), type->cardinality() | Cardinality::zeroOrOne()); }
Expression::Ptr TypeChecker::applyFunctionConversion(const Expression::Ptr &operand, const SequenceType::Ptr &reqType, const StaticContext::Ptr &context, const ReportContext::ErrorCode code, const Options options) { Q_ASSERT_X(!ReportContext::codeToString(code).isEmpty(), Q_FUNC_INFO, "This test ensures 'code' exists, otherwise codeToString() would assert."); Q_ASSERT(operand); Q_ASSERT(reqType); Q_ASSERT(context); /* Do it in two steps: verify type, and then cardinality. */ const Expression::Ptr cardVerified(CardinalityVerifier::verifyCardinality(operand, reqType->cardinality(), context, code)); return verifyType(cardVerified, reqType, context, code, options); }
Expression::Ptr TypeChecker::verifyType(const Expression::Ptr &operand, const SequenceType::Ptr &reqSeqType, const StaticContext::Ptr &context, const ReportContext::ErrorCode code, const Options options) { const ItemType::Ptr reqType(reqSeqType->itemType()); const Expression::Properties props(operand->properties()); /* If operand requires a focus, do the necessary type checking for that. */ if(props.testFlag(Expression::RequiresFocus) && options.testFlag(CheckFocus)) { const ItemType::Ptr contextType(context->contextItemType()); if(contextType) { if(props.testFlag(Expression::RequiresContextItem)) { Q_ASSERT_X(operand->expectedContextItemType(), Q_FUNC_INFO, "When the Expression sets the RequiresContextItem property, it must " "return a type in expectedContextItemType()"); const ItemType::Ptr expectedContextType(operand->expectedContextItemType()); /* Allow the empty sequence. We don't want to trigger XPTY0020 on ()/... . */ if(!expectedContextType->xdtTypeMatches(contextType) && contextType != CommonSequenceTypes::Empty) { context->error(wrongType(context->namePool(), operand->expectedContextItemType(), contextType), ReportContext::XPTY0020, operand.data()); return operand; } } } else { context->error(QtXmlPatterns::tr("The focus is undefined."), ReportContext::XPDY0002, operand.data()); return operand; } } SequenceType::Ptr operandSeqType(operand->staticType()); ItemType::Ptr operandType(operandSeqType->itemType()); /* This returns the operand if the types are identical or if operandType * is a subtype of reqType. */ if(reqType->xdtTypeMatches(operandType) || *operandType == *CommonSequenceTypes::Empty) return operand; /* Since we haven't exited yet, it means that the operandType is a super type * of reqType, and that there hence is a path down to it through the * type hierachy -- but that doesn't necessarily mean that a up-cast(down the * hierarchy) would succeed. */ Expression::Ptr result(operand); if(reqType->isAtomicType()) { const Expression::ID opID = operand->id(); if((opID == Expression::IDArgumentReference || (opID == Expression::IDCardinalityVerifier && operand->operands().first()->is(Expression::IDArgumentReference))) && *BuiltinTypes::item == *operandType) return Expression::Ptr(new ArgumentConverter(result, reqType)); if(!operandType->isAtomicType()) { result = Expression::Ptr(new Atomizer(result)); /* The atomizer might know more about the type. */ operandType = result->staticType()->itemType(); } if(reqType->xdtTypeMatches(operandType)) { /* Atomization was sufficient. Either the expected type is xs:anyAtomicType * or the type the Atomizer knows it returns, matches the required type. */ return result; } const bool compatModeEnabled = context->compatModeEnabled(); if((options.testFlag(AutomaticallyConvert) && BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(operandType)) || (compatModeEnabled && BuiltinTypes::xsString->xdtTypeMatches(reqType))) { if(*reqType == *BuiltinTypes::numeric) { result = typeCheck(new UntypedAtomicConverter(result, BuiltinTypes::xsDouble, code), context, reqSeqType); } else result = typeCheck(new UntypedAtomicConverter(result, reqType, code), context, reqSeqType); /* The UntypedAtomicConverter might know more about the type, so reload. */ operandType = result->staticType()->itemType(); } else if(compatModeEnabled && *reqType == *BuiltinTypes::xsDouble) { const FunctionFactory::Ptr functions(context->functionSignatures()); Expression::List numberArgs; numberArgs.append(operand); result = functions->createFunctionCall(QXmlName(StandardNamespaces::fn, StandardLocalNames::number), numberArgs, context, operand.data())->typeCheck(context, reqSeqType); operandType = result->staticType()->itemType(); context->wrapExpressionWith(operand.data(), result); } if(reqType->xdtTypeMatches(operandType)) return result; /* Test if promotion will solve it; the xdtTypeMatches didn't * do that. */ if(options.testFlag(AutomaticallyConvert) && promotionPossible(operandType, reqType, context)) { if(options.testFlag(GeneratePromotion)) return Expression::Ptr(new UntypedAtomicConverter(result, reqType)); else return result; } if(operandType->xdtTypeMatches(reqType)) { /* For example, operandType is numeric, and reqType is xs:integer. */ return Expression::Ptr(new ItemVerifier(result, reqType, code)); } else { context->error(wrongType(context->namePool(), reqType, operandType), code, operand.data()); return result; } } else if(reqType->isNodeType()) { ReportContext::ErrorCode myCode; if(*reqType == *CommonSequenceTypes::EBV->itemType()) myCode = ReportContext::FORG0006; else myCode = code; /* empty-sequence() is considered valid because it's ok to do * for example nilled( () ). That is, to pass an empty sequence to a * function requiring for example node()?. */ if(*operandType == *CommonSequenceTypes::Empty) return result; else if(!operandType->xdtTypeMatches(reqType)) { context->error(wrongType(context->namePool(), reqType, operandType), myCode, operand.data()); return result; } /* Operand must be an item. Thus, the sequence can contain both * nodes and atomic values: we have to verify. */ return Expression::Ptr(new ItemVerifier(result, reqType, myCode)); } else { Q_ASSERT(*reqType == *CommonSequenceTypes::Empty); /* element() doesn't match empty-sequence(), but element()* does. */ if(!reqType->xdtTypeMatches(operandType) && !operandSeqType->cardinality().allowsEmpty()) { context->error(wrongType(context->namePool(), reqType, operandType), code, operand.data()); return result; } } /* This line should be reached if required type is * EBVType, and the operand is compatible. */ return result; }
bool SequenceType::is(const SequenceType::Ptr &other) const { return matches(other) && other->matches(Ptr(this)); }
SequenceType::Ptr ArithmeticExpression::staticType() const { Cardinality card; /* These variables are important because they ensure staticType() only * gets called once from this function. Before, this lead to strange * semi-infinite recursion involving many arithmetic expressions. */ const SequenceType::Ptr st1(m_operand1->staticType()); const SequenceType::Ptr st2(m_operand2->staticType()); if(st1->cardinality().allowsEmpty() || st2->cardinality().allowsEmpty()) { card = Cardinality::zeroOrOne(); } else card = Cardinality::exactlyOne(); if(m_op == AtomicMathematician::IDiv) return makeGenericSequenceType(BuiltinTypes::xsInteger, card); const ItemType::Ptr t1(st1->itemType()); const ItemType::Ptr t2(st2->itemType()); ItemType::Ptr returnType; /* Please, make this beautiful? */ if(BuiltinTypes::xsTime->xdtTypeMatches(t1) || BuiltinTypes::xsDate->xdtTypeMatches(t1) || BuiltinTypes::xsDateTime->xdtTypeMatches(t1)) { if(BuiltinTypes::xsDuration->xdtTypeMatches(t2)) returnType = t1; else returnType = BuiltinTypes::xsDayTimeDuration; } else if(BuiltinTypes::xsYearMonthDuration->xdtTypeMatches(t1)) { if(m_op == AtomicMathematician::Div && BuiltinTypes::xsYearMonthDuration->xdtTypeMatches(t2)) { returnType = BuiltinTypes::xsDecimal; } else if(BuiltinTypes::numeric->xdtTypeMatches(t2)) returnType = BuiltinTypes::xsYearMonthDuration; else returnType = t2; } else if(BuiltinTypes::xsYearMonthDuration->xdtTypeMatches(t2)) { returnType = BuiltinTypes::xsYearMonthDuration; } else if(BuiltinTypes::xsDayTimeDuration->xdtTypeMatches(t1)) { if(m_op == AtomicMathematician::Div && BuiltinTypes::xsDayTimeDuration->xdtTypeMatches(t2)) { returnType = BuiltinTypes::xsDecimal; } else if(BuiltinTypes::numeric->xdtTypeMatches(t2)) returnType = BuiltinTypes::xsDayTimeDuration; else returnType = t2; } else if(BuiltinTypes::xsDayTimeDuration->xdtTypeMatches(t2)) { returnType = BuiltinTypes::xsDayTimeDuration; } else if(BuiltinTypes::xsDouble->xdtTypeMatches(t1) || BuiltinTypes::xsDouble->xdtTypeMatches(t2)) { returnType = BuiltinTypes::xsDouble; } else if(BuiltinTypes::xsFloat->xdtTypeMatches(t1) || BuiltinTypes::xsFloat->xdtTypeMatches(t2)) { if(m_isCompat) returnType = BuiltinTypes::xsFloat; else returnType = BuiltinTypes::xsDouble; } else if(BuiltinTypes::xsInteger->xdtTypeMatches(t1) && BuiltinTypes::xsInteger->xdtTypeMatches(t2)) { if(m_isCompat) returnType = BuiltinTypes::xsDouble; else { /* "A div B numeric numeric op:numeric-divide(A, B) * numeric; but xs:decimal if both operands are xs:integer" */ if(m_op == AtomicMathematician::Div) returnType = BuiltinTypes::xsDecimal; else returnType = BuiltinTypes::xsInteger; } } else if(m_isCompat && (BuiltinTypes::xsInteger->xdtTypeMatches(t1) && BuiltinTypes::xsInteger->xdtTypeMatches(t2))) { returnType = BuiltinTypes::xsDouble; } else { /* If typeCheck() has been called, our operands conform to expectedOperandTypes(), and * the types are hence either xs:decimals, or xs:anyAtomicType(meaning the static type could * not be inferred), or empty-sequence(). So we use the union of the two types. The combinations * could also be wrong.*/ returnType = t1 | t2; /* However, if we're called before typeCheck(), we could potentially have nodes, so we need to make * sure that the type is at least atomic. */ if(!BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(returnType)) returnType = BuiltinTypes::xsAnyAtomicType; } return makeGenericSequenceType(returnType, card); }
SequenceType::Ptr Atomizer::staticType() const { const SequenceType::Ptr opt(m_operand->staticType()); return makeGenericSequenceType(opt->itemType()->atomizedType(), opt->cardinality()); }