CodeQL library for C#
codeql/csharp-all 0.8.12 (changelog, source)
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Predicate signature variableWrite

Holds if the ith node of basic block bb is a (potential) write to source variable v. The Boolean certain indicates whether the write is certain.

Examples of uncertain writes are ref arguments in C#, where it is the callee that may or may not update the argument.

Import path

import codeql.ssa.Ssa
signature predicate variableWrite(BasicBlock bb, int i, SourceVariable v, boolean certain)