[meta.reflection.annotation] Replace "Constant When" with "Throws"

Author: Eisenwave

source/meta.tex

@@ -6577,18 +6577,6 @@
 \end{itemdecl}
 
 \begin{itemdescr}
-\pnum
-\constantwhen
-\tcode{item} represents a
-type,
-type alias,
-variable,
-function,
-namespace,
-enumerator,
-direct base class relationship, or
-non-static data member.
-
 \pnum
 Let $E$ be
 \begin{itemize}
@@ -6649,6 +6637,19 @@
 static_assert(annotations_of(^^x)[0] == annotations_of(^^y)[0]);
 \end{codeblock}
 \end{example}
+
+\pnum
+\throws
+\tcode{meta::exception} unless
+\tcode{item} represents a
+type,
+type alias,
+variable,
+function,
+namespace,
+enumerator,
+direct base class relationship, or
+non-static data member.
 \end{itemdescr}
 
 \indexlibraryglobal{annotations_of_with_type}%
@@ -6657,16 +6658,6 @@
 \end{itemdecl}
 
 \begin{itemdescr}
-\pnum
-\constantwhen
-\begin{itemize}
-\item
-  \tcode{annotations_of(item)} is a constant expression and
-\item
-  \tcode{dealias(type)} represents a type that is complete
-  from some point in the evaluation context.
-\end{itemize}
-
 \pnum
 \returns
 A \tcode{vector} containing each element \tcode{e} of \tcode{annotations_of(item)}
@@ -6675,6 +6666,17 @@
 remove_const(type_of(e)) == remove_const(type)
 \end{codeblock}
 is \tcode{true}, preserving their order.
+
+\pnum
+\throws
+\tcode{meta::exception} unless
+\begin{itemize}
+\item
+  \tcode{annotations_of(item)} is a constant expression and
+\item
+  \tcode{dealias(type)} represents a type that is complete
+  from some point in the evaluation context.
+\end{itemize}
 \end{itemdescr}
 
 \rSec1[ratio]{Compile-time rational arithmetic}