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| author | Ian Lynagh <ian@well-typed.com> | 2013-07-31 23:51:43 +0100 |
|---|---|---|
| committer | Ian Lynagh <ian@well-typed.com> | 2013-07-31 23:54:40 +0100 |
| commit | ffd7da35c140a38dd4410bb7edde27ea9fb2173c (patch) | |
| tree | a2bab6943d14bf258c909cc4bbbb7e7e5f882d17 | |
| parent | ef739635a8c2646112d2a1fa4c8715704aff1f1f (diff) | |
| download | haskell-ffd7da35c140a38dd4410bb7edde27ea9fb2173c.tar.gz | |
Document the Negative Literals extension
| -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 ======================= --> |