Merge branch 'hasse/dialyzer/improve_from_form/OTP-13547'

* hasse/dialyzer/improve_from_form/OTP-13547:
  Update primary bootstrap
  stdlib: Correct types and specs
  dialyzer: Minor adjustments
  dialyzer: Suppress unmatched_return for send/2
  dialyzer: Improve the translation of forms to types
  dialyzer: Use a cache when translating forms to types
  dialyzer: Prepare erl_types:t_from_form() for a cache
  dialyzer: Optimize erl_types:t_form_form()
  dialyzer: Correct types
  syntax_tools: Correct types
  erts: Correct character repr in doc of the abstract format
  stdlib: Correct types and specs

10 files changed, 57 insertions, 38 deletions

diff --git a/lib/stdlib/src/erl_expand_records.erl b/lib/stdlib/src/erl_expand_records.erl
index 9c0a7fb7d5..ebcbc54ab1 100644
--- a/lib/stdlib/src/erl_expand_records.erl
+++ b/lib/stdlib/src/erl_expand_records.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2005-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2005-2016. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -37,8 +37,9 @@
                  checked_ra=[]        % successfully accessed records
                 }).
 
--spec(module(AbsForms, CompileOptions) -> AbsForms when
+-spec(module(AbsForms, CompileOptions) -> AbsForms2 when
       AbsForms :: [erl_parse:abstract_form()],
+      AbsForms2 :: [erl_parse:abstract_form()],
       CompileOptions :: [compile:option()]).
 
 %% Is is assumed that Fs is a valid list of forms. It should pass
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index 2508f96b91..e9332ce069 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -99,7 +99,7 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) ->
                module='',                       %Module
                behaviour=[],                    %Behaviour
                exports=gb_sets:empty()	:: gb_sets:set(fa()),%Exports
-               imports=[] :: [fa()],            %Imports, an orddict()
+               imports=[] :: orddict:orddict(fa(), module()),%Imports
                compile=[],                      %Compile flags
                records=dict:new()               %Record definitions
                    :: dict:dict(atom(), {line(),Fields :: term()}),
@@ -467,7 +467,7 @@ used_vars(Exprs, BindingsList) ->
 %%  really all ordsets!
 
 -spec(module(AbsForms) -> {ok, Warnings} | {error, Errors, Warnings} when
-      AbsForms :: [erl_parse:abstract_form()],
+      AbsForms :: [erl_parse:abstract_form() | erl_parse:form_info()],
       Warnings :: [{file:filename(),[ErrorInfo]}],
       Errors :: [{FileName2 :: file:filename(),[ErrorInfo]}],
       ErrorInfo :: error_info()).
@@ -479,7 +479,7 @@ module(Forms) ->
 
 -spec(module(AbsForms, FileName) ->
              {ok, Warnings} | {error, Errors, Warnings} when
-      AbsForms :: [erl_parse:abstract_form()],
+      AbsForms :: [erl_parse:abstract_form() | erl_parse:form_info()],
       FileName :: atom() | string(),
       Warnings :: [{file:filename(),[ErrorInfo]}],
       Errors :: [{FileName2 :: file:filename(),[ErrorInfo]}],
@@ -492,7 +492,7 @@ module(Forms, FileName) ->
 
 -spec(module(AbsForms, FileName, CompileOptions) ->
              {ok, Warnings} | {error, Errors, Warnings} when
-      AbsForms :: [erl_parse:abstract_form()],
+      AbsForms :: [erl_parse:abstract_form() | erl_parse:form_info()],
       FileName :: atom() | string(),
       CompileOptions :: [compile:option()],
       Warnings :: [{file:filename(),[ErrorInfo]}],
diff --git a/lib/stdlib/src/erl_parse.yrl b/lib/stdlib/src/erl_parse.yrl
index 1de09aae62..85b2816451 100644
--- a/lib/stdlib/src/erl_parse.yrl
+++ b/lib/stdlib/src/erl_parse.yrl
@@ -531,7 +531,7 @@ Erlang code.
 -compile([{hipe,[{regalloc,linear_scan}]}]).
 
 -export_type([abstract_clause/0, abstract_expr/0, abstract_form/0,
-              abstract_type/0, error_info/0]).
+              abstract_type/0, form_info/0, error_info/0]).
 
 %% Start of Abstract Format
 
@@ -543,7 +543,6 @@ Erlang code.
                        | af_export()
                        | af_import()
                        | af_export_type()
-                       | af_optional_callbacks()
                        | af_compile()
                        | af_file()
                        | af_record_decl()
@@ -570,9 +569,6 @@ Erlang code.
 
 -type af_ta_list() :: [{type_name(), arity()}].
 
--type af_optional_callbacks() ::
-        {'attribute', anno(), 'optional_callbacks', af_fa_list()}.
-
 -type af_compile() :: {'attribute', anno(), 'compile', any()}.
 
 -type af_file() :: {'attribute', anno(), 'file', {string(), anno()}}.
@@ -864,16 +860,22 @@ Erlang code.
                                    | af_unary_op(af_singleton_integer_type())
                                    | af_binary_op(af_singleton_integer_type()).
 
--type af_literal() :: af_atom() | af_integer() | af_float() | af_string().
+-type af_literal() :: af_atom()
+                    | af_character()
+                    | af_float()
+                    | af_integer()
+                    | af_string().
 
 -type af_atom() :: af_lit_atom(atom()).
 
 -type af_lit_atom(A) :: {'atom', anno(), A}.
 
--type af_integer() :: {'integer', anno(), non_neg_integer()}.
+-type af_character() :: {'char', anno(), char()}.
 
 -type af_float() :: {'float', anno(), float()}.
 
+-type af_integer() :: {'integer', anno(), non_neg_integer()}.
+
 -type af_string() :: {'string', anno(), string()}.
 
 -type af_match(T) :: {'match', anno(), af_pattern(), T}.
@@ -941,6 +943,10 @@ Erlang code.
 
 -type type_name() :: atom().
 
+-type form_info() :: {'eof', erl_anno:line()}
+                   | {'error', erl_scan:error_info() | error_info()}
+                   | {'warning', erl_scan:error_info() | error_info()}.
+
 %% End of Abstract Format
 
 %% XXX. To be refined.
@@ -1500,8 +1506,9 @@ type_preop_prec('#') -> {700,800}.
                         | abstract_type().
 
 -spec map_anno(Fun, Abstr) -> NewAbstr when
-      Fun :: fun((Anno) -> Anno),
+      Fun :: fun((Anno) -> NewAnno),
       Anno :: erl_anno:anno(),
+      NewAnno :: erl_anno:anno(),
       Abstr :: erl_parse_tree(),
       NewAbstr :: erl_parse_tree().
 
@@ -1510,14 +1517,14 @@ map_anno(F0, Abstr) ->
     {NewAbstr, []} = modify_anno1(Abstr, [], F),
     NewAbstr.
 
--spec fold_anno(Fun, Acc0, Abstr) -> NewAbstr when
+-spec fold_anno(Fun, Acc0, Abstr) -> Acc1 when
       Fun :: fun((Anno, AccIn) -> AccOut),
       Anno :: erl_anno:anno(),
       Acc0 :: term(),
+      Acc1 :: term(),
       AccIn :: term(),
       AccOut :: term(),
-      Abstr :: erl_parse_tree(),
-      NewAbstr :: erl_parse_tree().
+      Abstr :: erl_parse_tree().
 
 fold_anno(F0, Acc0, Abstr) ->
     F = fun(A, Acc) -> {A, F0(A, Acc)} end,
@@ -1525,8 +1532,9 @@ fold_anno(F0, Acc0, Abstr) ->
     NewAcc.
 
 -spec mapfold_anno(Fun, Acc0, Abstr) -> {NewAbstr, Acc1} when
-      Fun :: fun((Anno, AccIn) -> {Anno, AccOut}),
+      Fun :: fun((Anno, AccIn) -> {NewAnno, AccOut}),
       Anno :: erl_anno:anno(),
+      NewAnno :: erl_anno:anno(),
       Acc0 :: term(),
       Acc1 :: term(),
       AccIn :: term(),
@@ -1542,7 +1550,9 @@ mapfold_anno(F, Acc0, Abstr) ->
       Abstr :: erl_parse_tree().
 
 new_anno(Term) ->
-    map_anno(fun erl_anno:new/1, Term).
+    F = fun(L, Acc) -> {erl_anno:new(L), Acc} end,
+    {NewAbstr, []} = modify_anno1(Term, [], F),
+    NewAbstr.
 
 -spec anno_to_term(Abstr) -> term() when
       Abstr :: erl_parse_tree().
diff --git a/lib/stdlib/src/erl_pp.erl b/lib/stdlib/src/erl_pp.erl
index 4009300a32..016962f538 100644
--- a/lib/stdlib/src/erl_pp.erl
+++ b/lib/stdlib/src/erl_pp.erl
@@ -70,13 +70,13 @@
 %%%
 
 -spec(form(Form) -> io_lib:chars() when
-      Form :: erl_parse:abstract_form()).
+      Form :: erl_parse:abstract_form() | erl_parse:form_info()).
 
 form(Thing) ->
     form(Thing, none).
 
 -spec(form(Form, Options) -> io_lib:chars() when
-      Form :: erl_parse:abstract_form(),
+      Form :: erl_parse:abstract_form() | erl_parse:form_info(),
       Options :: options()).
 
 form(Thing, Options) ->
diff --git a/lib/stdlib/src/lib.erl b/lib/stdlib/src/lib.erl
index 6fba63a895..56654097d9 100644
--- a/lib/stdlib/src/lib.erl
+++ b/lib/stdlib/src/lib.erl
@@ -73,7 +73,7 @@ nonl([H|T]) -> [H|nonl(T)].
 
 send(To, Msg) -> To ! Msg.
 
--spec sendw(To, Msg) -> Msg when
+-spec sendw(To, Msg) -> term() when
       To :: pid() | atom() | {atom(), node()},
       Msg :: term().
 
diff --git a/lib/stdlib/src/ms_transform.erl b/lib/stdlib/src/ms_transform.erl
index 24b5fde1db..c0eea652e7 100644
--- a/lib/stdlib/src/ms_transform.erl
+++ b/lib/stdlib/src/ms_transform.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2002-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2002-2016. All Rights Reserved.
 %% 
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -224,8 +224,9 @@ transform_from_shell(Dialect, Clauses, BoundEnvironment) ->
 %% Called when translating during compiling
 %%
 
--spec parse_transform(Forms, Options) -> Forms when
-      Forms :: [erl_parse:abstract_form()],
+-spec parse_transform(Forms, Options) -> Forms2 when
+      Forms :: [erl_parse:abstract_form() | erl_parse:form_info()],
+      Forms2 :: [erl_parse:abstract_form() | erl_parse:form_info()],
       Options :: term().
 
 parse_transform(Forms, _Options) ->
diff --git a/lib/stdlib/src/proplists.erl b/lib/stdlib/src/proplists.erl
index 8e99ec0ed9..5356467b19 100644
--- a/lib/stdlib/src/proplists.erl
+++ b/lib/stdlib/src/proplists.erl
@@ -438,8 +438,9 @@ substitute_aliases_1([], P) ->
 %% @see normalize/2
 
 -spec substitute_negations(Negations, ListIn) -> ListOut when
-      Negations :: [{Key, Key}],
-      Key :: term(),
+      Negations :: [{Key1, Key2}],
+      Key1 :: term(),
+      Key2 :: term(),
       ListIn :: [term()],
       ListOut :: [term()].
 
diff --git a/lib/stdlib/src/qlc.erl b/lib/stdlib/src/qlc.erl
index b396ba7057..f3665824f2 100644
--- a/lib/stdlib/src/qlc.erl
+++ b/lib/stdlib/src/qlc.erl
@@ -734,10 +734,11 @@ table(TraverseFun, Options) when is_function(TraverseFun) ->
 table(T1, T2) ->
     erlang:error(badarg, [T1, T2]).
 
--spec(transform_from_evaluator(LC, Bs) -> Expr when
+-spec(transform_from_evaluator(LC, Bs) -> Return when
       LC :: abstract_expr(),
-      Expr :: abstract_expr(),
-      Bs :: erl_eval:binding_struct()).
+      Bs :: erl_eval:binding_struct(),
+      Return :: {ok, abstract_expr()}
+              | {not_ok, {error, module(), Reason :: term()}}).
 
 transform_from_evaluator(LC, Bs0) ->
     qlc_pt:transform_from_evaluator(LC, Bs0).
diff --git a/lib/stdlib/src/qlc_pt.erl b/lib/stdlib/src/qlc_pt.erl
index e4b9768b12..0db63b81f4 100644
--- a/lib/stdlib/src/qlc_pt.erl
+++ b/lib/stdlib/src/qlc_pt.erl
@@ -67,8 +67,8 @@
 %%%
 
 -spec(parse_transform(Forms, Options) -> Forms2 when
-      Forms :: [erl_parse:abstract_form()],
-      Forms2 :: [erl_parse:abstract_form()],
+      Forms :: [erl_parse:abstract_form() | erl_parse:form_info()],
+      Forms2 :: [erl_parse:abstract_form() | erl_parse:form_info()],
       Options :: [Option],
       Option :: type_checker | compile:option()).
 
@@ -117,19 +117,21 @@ parse_transform(Forms0, Options) ->
         true = ets:delete(NodeInfo)
     end.
 
--spec(transform_from_evaluator(LC, Bs) -> Expr when
+-spec(transform_from_evaluator(LC, Bs) -> Return when
       LC :: erl_parse:abstract_expr(),
-      Expr :: erl_parse:abstract_expr(),
-      Bs :: erl_eval:binding_struct()).
+      Bs :: erl_eval:binding_struct(),
+      Return :: {ok, erl_parse:abstract_expr()}
+              | {not_ok, {error, module(), Reason :: term()}}).
 
 transform_from_evaluator(LC, Bindings) ->
     ?DEBUG("qlc Parse Transform (Evaluator Version)~n", []),
     transform_expression(LC, Bindings, false).
 
--spec(transform_expression(LC, Bs) -> Expr when
+-spec(transform_expression(LC, Bs) -> Return when
       LC :: erl_parse:abstract_expr(),
-      Expr :: erl_parse:abstract_expr(),
-      Bs :: erl_eval:binding_struct()).
+      Bs :: erl_eval:binding_struct(),
+      Return :: {ok, erl_parse:abstract_expr()}
+              | {not_ok, [{error, Reason :: term()}]}).
 
 transform_expression(LC, Bindings) ->
     transform_expression(LC, Bindings, true).
diff --git a/lib/stdlib/src/sofs.erl b/lib/stdlib/src/sofs.erl
index b18df2ad09..c244e06ca4 100644
--- a/lib/stdlib/src/sofs.erl
+++ b/lib/stdlib/src/sofs.erl
@@ -621,6 +621,9 @@ canonical_relation(Sets) when ?IS_SET(Sets) ->
 %%% Functions on binary relations only.
 %%%
 
+-spec(rel2fam(BinRel) -> Family when
+      Family :: family(),
+      BinRel :: binary_relation()).
 rel2fam(R) ->
     relation_to_family(R).