Method copy

basex-core/src/main/java/org/basex/query/expr/Expr.java:322–322

Copies an expression. Used for inlining functions, or for copying static queries. It is utilized by VarRef#inline, FuncItem#inline, Closure#inline and StaticFunc#inline. @param cc compilation context @param vm mapping from old variable IDs to new variable copies.

(CompileContext cc, IntObjectMap<Var> vm)

   * @return copied expression
   */
  public abstract Expr copy(CompileContext cc, IntObjectMap<Var> vm);

  /**
   * Simplifies the expression. Overwritten by many expressions;