cppdraft_translate/cppdraft/exec/fwd/env.md

[exec.fwd.env]

33 Execution control library [exec]

33.5 Queries [exec.queries]

33.5.1 forwarding_query [exec.fwd.env]

1

#

forwarding_query asks a query object whether it should be forwarded through queryable adaptors.

2

#

The name forwarding_query denotes a query object.

For some query object q of type Q,forwarding_query(q) is expression-equivalent to:

• (2.1)

  MANDATE-NOTHROW(q.query(forwarding_query)) if that expression is well-formed. Mandates: The expression above has type bool and is a core constant expression if q is a core constant expression.

• (2.2)

  Otherwise, true if derived_from<Q, forwarding_query_t> is true.

• (2.3)

  Otherwise, false.