public static ParseNode[] GetFieldIdentifier(this ParseNode declaration)
{
ParseNode content = declaration.ChildrenSkipUnnamed().FirstOrDefault(n => n.RuleType == "plus" && n.RuleName == "declaration_content");
if (content == null)
{
return(Array.Empty <ParseNode>());
}
return(content.ChildrenSkipUnnamed()
.TakeWhile(n => !EqualsMatch.IsMatch(n.ToString()))
.Select(Identifier)
.Where(n => n != null)
.ToArray());
ParseNode Identifier(ParseNode parent)
{
if (parent.RuleType == "choice" && parent.RuleName == "node")
{
ParseNode result = parent.FirstOrDefault();
if (result?.RuleName == "identifier" || result?.RuleName == "generic")
{
return(result);
}
}
return(null);
}
}
public static ParseNode[] GetFieldValue(this ParseNode declaration)
{
ParseNode content = declaration.ChildrenSkipUnnamed().FirstOrDefault(n => n.RuleType == "plus" && n.RuleName == "declaration_content");
if (content == null)
{
return(Array.Empty <ParseNode>());
}
return(content.ChildrenSkipUnnamed()
.SkipWhile(n => !EqualsMatch.IsMatch(n.ToString()))
.Skip(1)
.Where(n => n.ToString() != ";")
.ToArray());
}
public static bool IsValidFieldDeclaration(this ParseNode declaration)
{
return(!declaration.GetHierarchy().Any(IsForbiddenParanthesisGroup) &&
declaration.GetHierarchy().All(n => n.RuleName != "typedef_decl") &&
declaration.GetHierarchy().All(n => n.RuleName != "pp_directive"));
bool IsForbiddenParanthesisGroup(ParseNode n)
{
if (n.RuleName != "paran_group")
{
return(false);
}
ParseNode parent = n.GetParent();
while (parent.Count(c => c.RuleName != "comment_set") == 1)
{
n = parent;
parent = n.GetParent();
}
return(parent.TakeWhile(c => c != n).All(c => !EqualsMatch.IsMatch(c.ToString())));
}
}