# HG changeset patch # User blanchet # Date 1281085557 -7200 # Node ID d4cbc80e72713664882c38116b294a7f4919aa89 # Parent a7e92239922f17030011de312778e4f97df0f313 extend the scope of limitation about nonconservative extensions diff -r a7e92239922f -r d4cbc80e7271 doc-src/Nitpick/nitpick.tex --- a/doc-src/Nitpick/nitpick.tex Fri Aug 06 10:50:52 2010 +0200 +++ b/doc-src/Nitpick/nitpick.tex Fri Aug 06 11:05:57 2010 +0200 @@ -2864,16 +2864,19 @@ \textbf{by}~(\textit{auto simp}:~\textit{prec\_def}) \postw -Such theorems are considered bad style because they rely on the internal -representation of functions synthesized by Isabelle, which is an implementation +Such theorems are generally considered bad style because they rely on the +internal representation of functions synthesized by Isabelle, an implementation detail. \item[$\bullet$] Similarly, Nitpick might find spurious counterexamples for theorems that rely on the use of the indefinite description operator internally by \textbf{specification} and \textbf{quot\_type}. -\item[$\bullet$] Axioms that restrict the possible values of the -\textit{undefined} constant are in general ignored. +\item[$\bullet$] Axioms or definitions that restrict the possible values of the +\textit{undefined} constant or other partially specified built-in Isabelle +constants (e.g., \textit{Abs\_} and \textit{Rep\_} constants) are in general +ignored. Again, such nonconservative extensions are generally considered bad +style. \item[$\bullet$] Nitpick maintains a global cache of wellfoundedness conditions, which can become invalid if you change the definition of an inductive predicate