well-formed | 易学教程

In the C++ standard does well-formed means that the code compiles?

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问题 The C++ standards defines well-formed programs as C ++ program constructed according to the syntax rules, diagnosable semantic rules, and the one-definition rule I am wondering if all well-formed program compile or not (if it is not the case, what types of error make the difference between a well-formed program and a compilable problem). For example would a program containing ambiguity errors considered as well-formed? 回答1: A well-formed program can have undefined behaviour. It's in a note,

Validating against a Schema with JAXB

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问题 I've been looking for solutions to this problem for far too long considering how easy it sounds so I've come for some help. I have an XML Schema which I have used with xjc to create my JAXB binding. This works fine when the XML is well formed. Unfortunately it also doesn't complain when the XML is not well formed. I cannot figure out how to do proper full validation against the schema when I try to unmarshall an XML file. I have managed to use a ValidationEventCollector to handle events,

Removing invalid characters from XML before serializing it with XMLSerializer()

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问题 I'm trying to store user-input in an XML document on the client-side (javascript), and transmit that to the server for persistence. One user, for example, pasted in text that included an STX character (0x2). The XMLSerializer did not escape the STX character, and therefore, did not serialize to well-formed XML. Or perhaps the .attr() call should have escaped the STX character, but in either case, invalid XML was produced. I'm finding the output of in-browser XMLSerializer() isn't always well

Specifying root and child nodes with JAXB

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问题 Staying within JAXB how would I refactor MyNote so that it conforms to: <note> <to>Tove</to> <from>Jani</from> <heading>Reminder</heading> <body>Don't forget me this weekend!</body> </note> Which is well formed but not valid, to my understanding. Current output: <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <MyNotes> <Note> <note>XY3Z1RGEO9W79LALCS</note> <to>LJAY9RNMUGGENGNND9</to> <from>GOVSHVZ3GJWC864L7X</from> <heading>EX6LGVE5LGY4A6B9SK</heading> <body>L95WYQNMEU1MFDRBG4</body>

zero length variadic expansion of ill-formed call

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问题 Question for standard gurus. Trying to respond to another question, I came to doubt about the well-formedness of a code. As far I know, the following code is ill-formed int main () { std::tuple<> a; std::get<0>(a); } because a call to std::get<I>(t) , when t is a std::tuple<Ts...> , is ill-formed when I is outside the range [0, sizeof...(Ts)[ . In this case sizeof...(Ts) is zero, so the range [0, 0[ is empty, so std::get<I>(a) is ill-formed for every index I . But when std::get<I>(a) is

template, well formedness and zero pack length rule

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问题 From the accepted answer of a previous question I've discovered a rule I didn't know about templates and well formedness The program is ill-formed, no diagnostic required, if: [...] every valid specialization of a variadic template requires an empty template parameter pack, or [...] According this rule (if I understand correctly), the following template function is ill-formed template <typename ... Ts> int foo (std::tuple<Ts...> const &) { return std::get<sizeof...(Ts)>(std::tuple<int>{42});

The markup must be well-formed

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问题 First off, let me say I am a new to SAX and Java. I am trying to read information from an XML file that is not well formed. When I try to use the SAX or DOM Parser I get the following error in response: The markup in the document following the root element must be well-formed. This is how I set up my XML file: <format type="filename" t="13241">0;W650;004;AG-Erzgeb</format> <format type="driver" t="123412">001;023</format> ... Can I force the SAX or DOM to parse XML files even if they are not

Is this valid YAML?

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问题 So for my text parsing in C# question, I got directed at YAML. I'm hitting a wall with this library I was recommended, so this is a quickie. heading: name: A name taco: Yes age: 32 heading: name: Another name taco: No age: 27 And so on. Is that valid? 回答1: Partially. YAML supports the notion of multiple consecutive "documents". If this is what you are trying to do here, then yes, it is correct - you have two documents (or document fragments). To make it more explicit, you should separate them

The markup must be well-formed

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First off, let me say I am a new to SAX and Java. I am trying to read information from an XML file that is not well formed. When I try to use the SAX or DOM Parser I get the following error in response: The markup in the document following the root element must be well-formed. This is how I set up my XML file: <format type="filename" t="13241">0;W650;004;AG-Erzgeb</format> <format type="driver" t="123412">001;023</format> ... Can I force the SAX or DOM to parse XML files even if they are not well formed XML? Thank you for your help. Much appreciated. Haythem Your best bet is to make the XML

What is the fastest way to programatically check the well-formedness of XML files in C#?

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I have large batches of XHTML files that are manually updated. During the review phase of the updates i would like to programmatically check the well-formedness of the files. I am currently using a XmlReader , but the time required on an average CPU is much longer than i expected. The XHTML files range in size from 4KB to 40KB and verifying takes several seconds per file. Checking is essential but i would like to keep the time as short as possible as the check is performed while files are being read into the next process step. Is there a faster way of doing a simple XML well-formedness check?