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cppdraft/exec/fwd/env.md

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+[exec.fwd.env]
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+# 33 Execution control library [[exec]](./#exec)
+
+## 33.5 Queries [[exec.queries]](exec.queries#exec.fwd.env)
+
+### 33.5.1 forwarding_query [exec.fwd.env]
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/exec.tex#L837)
+
+forwarding_query asks a query object
+whether it should be forwarded through queryable adaptors[.](#1.sentence-1)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/exec.tex#L841)
+
+The name forwarding_query denotes a query object[.](#2.sentence-1)
+
+For some query object q of type Q,forwarding_query(q) is expression-equivalent to:
+
+- [(2.1)](#2.1)
+
+  *MANDATE-NOTHROW*(q.query(forwarding_query)) if that expression is well-formed[.](#2.1.sentence-1)
+  *Mandates*: The expression above has type bool and
+is a core constant expression if q is a core constant expression[.](#2.1.sentence-2)
+
+- [(2.2)](#2.2)
+
+  Otherwise, true if [derived_from](concept.derived#concept:derived_from "18.4.3 Concept derived_­from [concept.derived]")<Q, forwarding_query_t> is true[.](#2.2.sentence-1)
+
+- [(2.3)](#2.3)
+
+  Otherwise, false[.](#2.3.sentence-1)