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

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

Import path

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