codeql

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Copilot 7fefacd56f Python: introduce TExpr union via newtype-branch alias

Mirror the TStmt refactor for the Expr hierarchy: rename the TExpr
newtype branch to TPyExpr and add

  private class TExpr = TPyExpr or TBoolExprPair;

This lets the public Expr class use TExpr directly:

  class Expr extends AstNodeImpl, TExpr { ... }

instead of

  class Expr extends AstNodeImpl {
    Expr() { this instanceof TExpr or this instanceof TBoolExprPair }
    ...
  }

No behaviour change: all 24 NewCfg evaluation-order tests pass; all
11 shared-CFG consistency queries report 0 violations on CPython.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

2026-05-07 19:33:33 +00:00