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42 #include "qpatternistlocale_p.h"
44 #include "qabstractfunctionfactory_p.h"
48 using namespace QPatternist;
50 Expression::Ptr AbstractFunctionFactory::createFunctionCall(const QXmlName name,
51 const Expression::List &args,
52 const StaticContext::Ptr &context,
53 const SourceLocationReflection *const r)
55 const FunctionSignature::Ptr sign(retrieveFunctionSignature(context->namePool(), name));
57 if(!sign) /* The function doesn't exist(at least not in this factory). */
58 return Expression::Ptr();
61 verifyArity(sign, context, args.count(), r);
63 /* Ok, the function does exist and the arity is correct. */
64 return retrieveExpression(name, args, sign);
67 void AbstractFunctionFactory::verifyArity(const FunctionSignature::Ptr &s,
68 const StaticContext::Ptr &context,
69 const xsInteger arity,
70 const SourceLocationReflection *const r) const
72 /* Same code in both branches, but more specific error messages in order
73 * to improve usability. */
74 if(s->maximumArguments() != FunctionSignature::UnlimitedArity &&
75 arity > s->maximumArguments())
77 context->error(QtXmlPatterns::tr("%1 takes at most %n argument(s). "
78 "%2 is therefore invalid.", 0, s->maximumArguments())
79 .arg(formatFunction(context->namePool(), s))
81 ReportContext::XPST0017,
86 if(arity < s->minimumArguments())
88 context->error(QtXmlPatterns::tr("%1 requires at least %n argument(s). "
89 "%2 is therefore invalid.", 0, s->minimumArguments())
90 .arg(formatFunction(context->namePool(), s))
92 ReportContext::XPST0017,
98 FunctionSignature::Hash AbstractFunctionFactory::functionSignatures() const