CodeQL library for C#
codeql/csharp-all 1.0.3-dev (changelog, source)
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Predicate Gvn::Cached::subsumes

Holds if GVN t1 subsumes GVN t2. That is, it is possible to replace all type parameters in t1 with some GVNs (possibly type parameters themselves) to make the two substituted terms equal.

Import path

import semmle.code.csharp.Unification
predicate subsumes(ConstructedGvnType t1, ConstructedGvnType t2)