Xpath with Asterisk - Githubissues

Here we have a module which has a must xpath expression

module xpath-asterisk {
  namespace xa;
  prefix xa;
  container routings {
    list routing {
        key "name";
        leaf name {
            type string;
        }
        list api {
          key "name";
      leaf name {
            type string;
            must "count(/xa:routings/xa:routing[*]/xa:api[xa:name = current()]) = 1";
          }
       }
    }
  }
}

When yang-lsp loading this xpath, the stack will go through the following methods XpathResolver.computeType() -> XpathResolver.findNodes() findNodes() will return 2 children nodes correctly. [name, api]

But when Linker get the result from resolver.apply() https://github.com/theia-ide/yang-lsp/blob/8c45e2c6320c3192646e067f7aa123a66b23faff/yang-lsp/io.typefox.yang/src/main/java/io/typefox/yang/scoping/Linker.xtend#L32 The candidate only have one EObjectDescription.

This is due to XpathResolver.getEObjectDescription() only return the head of XpathType.nodes. https://github.com/theia-ide/yang-lsp/blob/8c45e2c6320c3192646e067f7aa123a66b23faff/yang-lsp/io.typefox.yang/src/main/java/io/typefox/yang/scoping/xpath/XpathResolver.xtend#L475

In this case, * actually only link to the first returned schema node. There will have two consequnces.

Loading result is not correct,
- -> [The first node]
Serialize result is not correct. Because * link to a wrong node, the serialization result will only output the linked node name back to string. So the final serialization output looks like.
```
...
list api {
key "name";
leaf name {
  type string;
  must "count(/xa:routings/xa:routing[api]/xa:api[xa:name = current()]) = 1";
 }
}
...
```

TypeFox / yang-lsp

Xpath with Asterisk #160