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| author | Richard Eisenberg <eir@cis.upenn.edu> | 2014-12-19 10:19:55 -0500 |
|---|---|---|
| committer | Richard Eisenberg <eir@cis.upenn.edu> | 2014-12-19 10:20:35 -0500 |
| commit | 3fffd32c1329e6e21e3e1eefd776a24e503fcefe (patch) | |
| tree | 33b316c21a4226b4edd365b63d19ea1602ca266b | |
| parent | 53599b3f515227f3407991913781fc8ea79d9638 (diff) | |
| download | haskell-3fffd32c1329e6e21e3e1eefd776a24e503fcefe.tar.gz | |
Update release notes for recent language and TH changes.
| -rw-r--r-- | docs/users_guide/7.10.1-notes.xml | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/docs/users_guide/7.10.1-notes.xml b/docs/users_guide/7.10.1-notes.xml index f87b0ccd29..58d7bdfc2b 100644 --- a/docs/users_guide/7.10.1-notes.xml +++ b/docs/users_guide/7.10.1-notes.xml @@ -72,6 +72,17 @@ <literal>[t|forall a. Ord a => a|]</literal>. </para> </listitem> + + <listitem> + <para> + Instance contexts inferred while processing <literal>deriving</literal> + directives attached to <literal>data</literal> and <literal>newtype</literal> + declarations now forbid equality constraints. This is a regression in + obscure cases, but it will yield better error messages in more common + cases. Users caught by the regression can simply use standalone-deriving, + where you specify the context yourself. + </para> + </listitem> </itemizedlist> </sect3> @@ -191,7 +202,9 @@ Added support for generating LINE pragma declarations (<xref linkend="line-pragma"/>). </para> + </listitem> + <listitem> <para> The type <literal>Pred</literal> (which stores a type constraint) is now a synonym for <literal>Type</literal>, @@ -199,17 +212,23 @@ extension. This is a breaking change and may require some rewriting of Template Haskell code. </para> + </listitem> + <listitem> <para> Pattern splices now work. </para> + </listitem> + <listitem> <para> <literal>reifyInstances</literal> now treats unbound type variables as univerally quantified, allowing lookup of, say, the instance for <literal>Eq [a]</literal>. </para> + </listitem> + <listitem> <para> More kind annotations appear in reified types, in order to disambiguate types that would otherwise be ambiguous in the @@ -218,22 +237,40 @@ <literal>KindedTV</literal>s. (This does not affect Template Haskell quotations, just calls to <literal>reify</literal>.) </para> + </listitem> + <listitem> <para> Various features unsupported in quotations were previously silently ignored. These now cause errors. </para> + </listitem> + <listitem> <para> <literal>Lift</literal> instances were added for - <literal>()</literal> and <literal>Ratio</literal>. + many more types: all of the <literal>IntXX</literal> + and <literal>WordXX</literal> types, <literal>Ratio a</literal>, + <literal>()</literal>, <literal>Float</literal>, and + <literal>Double</literal>. </para> + </listitem> + <listitem> <para> All Template Haskell datatypes now have <literal>Generic</literal> and <literal>Ord</literal> instances. </para> + </listitem> + <listitem> + <para> + <literal>Ppr</literal> instances were added for <literal>Lit</literal> + and <literal>Loc</literal>. + </para> + </listitem> + + <listitem> <para> Two new declaration forms are now supported: standalone-deriving declarations and generic method @@ -241,7 +278,9 @@ a class). This means an expansion to the <literal>Dec</literal> type. </para> + </listitem> + <listitem> <para> Template Haskell is now more pedantic about splicing in bogus variable names, like those containing whitespace. If you |