Allow end for non-integer indexing.

Closes modelica#2204

chapters/arrays.tex

@@ -1021,14 +1021,18 @@ \subsection{Indexing with Boolean or Enumeration Values}\label{indexing-with-boo
 
 \subsection{Indexing with end}\label{indexing-with-end}
 
-The expression \lstinline!end! may only appear inside array subscripts, and if used in the $i$:th subscript of an array expression \lstinline!A! it is equivalent
-to \lstinline!size(A, $i$)! provided indices to \lstinline!A! are a subtype of \lstinline!Integer!.  If used inside nested array subscripts it refers
-to the most closely nested array.
-
+The expression \lstinline!end! may only appear inside array subscripts, and if used in the $i$:th subscript of an array expression \lstinline!A! it is equivalent to the upper bound of the $i$:th dimension of \lstinline!A!.
+If used inside nested array subscripts it refers to the most closely nested array.
+\begin{nonnormative}
+If indices to \lstinline!A! are a subtype of \lstinline!Integer! it is equivalent to \lstinline!size(A,i)!.
+\end{nonnormative}
 \begin{example}
 \begin{lstlisting}[language=modelica, escapechar=!]
 A[end - 1, end] !is! A[size(A,1) - 1, size(A,2)]
 A[v[end], end] !is! A[v[size(v,1)], size(A,2)] // !\emph{First}! end !\emph{is referring to end of v.}!
+
+Real B[Boolean];
+B[end] !is! B[true]
 \end{lstlisting}
 \end{example}