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| -rw-r--r-- | docs/users_guide/glasgow_exts.xml | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/docs/users_guide/glasgow_exts.xml b/docs/users_guide/glasgow_exts.xml index 57f94b4a76..f972a4bd56 100644 --- a/docs/users_guide/glasgow_exts.xml +++ b/docs/users_guide/glasgow_exts.xml @@ -440,6 +440,21 @@ Indeed, the bindings can even be recursive. </para> </sect2> + <sect2 id="negative-literals"> + <title>Negative Literals</title> + <para> + The literal <literal>-123</literal> is, according to + Haskell98 and Haskell 2010, desugared as + <literal>negate (fromInteger 123)</literal>. + </para> + + <para> + The language extension <option>-XNegativeLiterals</option> + means that it is instead desugared as + <literal>fromInteger (-123)</literal>. + </para> + </sect2> + <!-- ====================== HIERARCHICAL MODULES ======================= --> |