forgetest1
/
antlr
forked from jasder/antlr
1
0
Fork 0
Code Issues Pull Requests 1 Releases Wiki Activity

Implement SemanticContext.FilterPrecedencePredicates

This commit is contained in:
Sam Harwell 2013-02-19 18:46:02 -06:00
parent 0c97547a7e
commit 115b4736ed
1 changed files with 6 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
Antlr4.Runtime/Atn/SemanticContext.cs
View File

@ -386,27 +386,13 @@ namespace Antlr4.Runtime.Atn
}
private static IList<SemanticContext.PrecedencePredicate> FilterPrecedencePredicates
<_T0>(ICollection<_T0> collection) where _T0:SemanticContext
(ISet<SemanticContext> collection)
{
List<SemanticContext.PrecedencePredicate> result = null;
for (IEnumerator<SemanticContext> iterator = collection.GetEnumerator(); iterator
.HasNext(); )
{
SemanticContext context = iterator.Next();
if (context is SemanticContext.PrecedencePredicate)
{
if (result == null)
{
result = new List<SemanticContext.PrecedencePredicate>();
}
result.Add((SemanticContext.PrecedencePredicate)context);
iterator.Remove();
}
}
if (result == null)
{
return Collections.EmptyList<PrecedencePredicate>();
}
if (!collection.OfType<PrecedencePredicate>().Any())
Collections.EmptyList<PrecedencePredicate>();
List<PrecedencePredicate> result = collection.OfType<PrecedencePredicate>().ToList();
collection.ExceptWith(result);
return result;
}
}