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Ulf Wiger 2016-06-23 09:59:58 +02:00
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@ -0,0 +1,178 @@
Apache License
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unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
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40
rebar.config
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@ -1,12 +1,36 @@
%% -*- erlang -*-
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% --------------------------------------------------
%% This file is provided to you under the Apache License,
%% Version 2.0 (the "License"); you may not use this file
%% except in compliance with the License. You may obtain
%% a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing,
%% software distributed under the License is distributed on an
%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%% KIND, either express or implied. See the License for the
%% specific language governing permissions and limitations
%% under the License.
%% --------------------------------------------------
{erl_first_files, ["src/parse_trans.erl",
"src/parse_trans_pp.erl",
"src/parse_trans_codegen.erl"]}.
"src/parse_trans_pp.erl",
"src/parse_trans_codegen.erl"]}.
{erl_opts, [debug_info]}.
{xref_checks, [undefined_function_calls]}.
{deps, [{edown, ".*", {git, "git://github.com/uwiger/edown.git", {branch, "master"}}}]}.
{edoc_opts, [{doclet, edown_doclet},
{top_level_readme,
{"./README.md",
"http://github.com/uwiger/parse_trans"}}]}.
{profiles,
[{docs,
[
{deps,
[{edown, ".*",
{git, "git://github.com/uwiger/edown.git", {tag, "0.8"}}}]},
{edoc_opts, [{doclet, edown_doclet},
{top_level_readme,
{"./README.md",
"http://github.com/uwiger/parse_trans"}}]}
]}
]}.

171
src/ct_expand.erl
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@ -1,28 +1,23 @@
%%% The contents of this file are subject to the Erlang Public License,
%%% Version 1.1, (the "License"); you may not use this file except in
%%% compliance with the License. You may obtain a copy of the License at
%%% http://www.erlang.org/EPLICENSE
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% --------------------------------------------------
%% This file is provided to you under the Apache License,
%% Version 2.0 (the "License"); you may not use this file
%% except in compliance with the License. You may obtain
%% a copy of the License at
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing,
%% software distributed under the License is distributed on an
%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%% KIND, either express or implied. See the License for the
%% specific language governing permissions and limitations
%% under the License.
%%
%% The Original Code is exprecs-0.2.
%%
%% The Initial Developer of the Original Code is Ericsson AB.
%% Portions created by Ericsson are Copyright (C), 2006, Ericsson AB.
%% All Rights Reserved.
%%
%% Contributor(s): ______________________________________.
%%-------------------------------------------------------------------
%% --------------------------------------------------
%% File : ct_expand.erl
%% @author : Ulf Wiger <ulf@feuerlabs.com>
%% @author : Ulf Wiger <ulf@wiger.net>
%% @end
%% Description :
%%
%% Created : 7 Apr 2010 by Ulf Wiger <ulf@feuerlabs.com>
%% Created : 7 Apr 2010 by Ulf Wiger <ulf@wiger.net>
%%-------------------------------------------------------------------
%% @doc Compile-time expansion utility
@ -53,7 +48,7 @@
-export([parse_transform/2]).
-export([extract_fun/3,
lfun_rewrite/2]).
lfun_rewrite/2]).
-type form() :: any().
-type forms() :: [form()].
@ -65,37 +60,37 @@
parse_transform(Forms, Options) ->
Trace = ct_trace_opt(Options, Forms),
case parse_trans:depth_first(fun(T,F,C,A) ->
xform_fun(T,F,C,A,Forms, Trace)
end, [], Forms, Options) of
{error, Es} ->
Es ++ Forms;
{NewForms, _} ->
parse_trans:revert(NewForms)
xform_fun(T,F,C,A,Forms, Trace)
end, [], Forms, Options) of
{error, Es} ->
Es ++ Forms;
{NewForms, _} ->
parse_trans:revert(NewForms)
end.
ct_trace_opt(Options, Forms) ->
case proplists:get_value(ct_expand_trace, Options) of
undefined ->
case [Opt || {attribute,_,ct_expand_trace,Opt} <- Forms] of
[] ->
[];
[_|_] = L ->
lists:last(L)
end;
Flags when is_list(Flags) ->
Flags
undefined ->
case [Opt || {attribute,_,ct_expand_trace,Opt} <- Forms] of
[] ->
[];
[_|_] = L ->
lists:last(L)
end;
Flags when is_list(Flags) ->
Flags
end.
xform_fun(application, Form, _Ctxt, Acc, Forms, Trace) ->
MFA = erl_syntax_lib:analyze_application(Form),
case MFA of
{?MODULE, {term, 1}} ->
LFH = fun(Name, Args, Bs) ->
eval_lfun(
extract_fun(Name, length(Args), Forms),
Args, Bs, Forms, Trace)
end,
Args = erl_syntax:application_arguments(Form),
LFH = fun(Name, Args, Bs) ->
eval_lfun(
extract_fun(Name, length(Args), Forms),
Args, Bs, Forms, Trace)
end,
Args = erl_syntax:application_arguments(Form),
RevArgs = parse_trans:revert(Args),
case erl_eval:exprs(RevArgs, [], {eval, LFH}) of
{value, Value,[]} ->
@ -113,43 +108,43 @@ xform_fun(_, Form, _Ctxt, Acc, _, _) ->
extract_fun(Name, Arity, Forms) ->
case [F_ || {function,_,N_,A_,_Cs} = F_ <- Forms,
N_ == Name, A_ == Arity] of
[] ->
erlang:error({undef, [{Name, Arity}]});
[FForm] ->
FForm
N_ == Name, A_ == Arity] of
[] ->
erlang:error({undef, [{Name, Arity}]});
[FForm] ->
FForm
end.
eval_lfun({function,L,F,_,Clauses}, Args, Bs, Forms, Trace) ->
try
begin
{ArgsV, Bs1} = lists:mapfoldl(
fun(A, Bs_) ->
{value,AV,Bs1_} =
erl_eval:expr(A, Bs_, lfh(Forms, Trace)),
{abstract(AV), Bs1_}
end, Bs, Args),
Expr = {call, L, {'fun', L, {clauses, lfun_rewrite(Clauses, Forms)}}, ArgsV},
call_trace(Trace =/= [], L, F, ArgsV),
{value, Ret, _} =
erl_eval:expr(Expr, erl_eval:new_bindings(), lfh(Forms, Trace)),
ret_trace(lists:member(r, Trace) orelse lists:member(x, Trace),
L, F, Args, Ret),
%% restore bindings
{value, Ret, Bs1}
end
begin
{ArgsV, Bs1} = lists:mapfoldl(
fun(A, Bs_) ->
{value,AV,Bs1_} =
erl_eval:expr(A, Bs_, lfh(Forms, Trace)),
{abstract(AV), Bs1_}
end, Bs, Args),
Expr = {call, L, {'fun', L, {clauses, lfun_rewrite(Clauses, Forms)}}, ArgsV},
call_trace(Trace =/= [], L, F, ArgsV),
{value, Ret, _} =
erl_eval:expr(Expr, erl_eval:new_bindings(), lfh(Forms, Trace)),
ret_trace(lists:member(r, Trace) orelse lists:member(x, Trace),
L, F, Args, Ret),
%% restore bindings
{value, Ret, Bs1}
end
catch
error:Err ->
exception_trace(lists:member(x, Trace), L, F, Args, Err),
error(Err)
error:Err ->
exception_trace(lists:member(x, Trace), L, F, Args, Err),
error(Err)
end.
lfh(Forms, Trace) ->
{eval, fun(Name, As, Bs1) ->
eval_lfun(
extract_fun(Name, length(As), Forms),
As, Bs1, Forms, Trace)
end}.
eval_lfun(
extract_fun(Name, length(As), Forms),
As, Bs1, Forms, Trace)
end}.
call_trace(false, _, _, _) -> ok;
call_trace(true, L, F, As) ->
@ -159,14 +154,14 @@ pp_function(F, []) ->
atom_to_list(F) ++ "()";
pp_function(F, [A|As]) ->
lists:flatten([atom_to_list(F), "(",
[io_lib:fwrite("~w", [erl_parse:normalise(A)]) |
[[",", io_lib:fwrite("~w", [erl_parse:normalise(A_)])] || A_ <- As]],
")"]).
[io_lib:fwrite("~w", [erl_parse:normalise(A)]) |
[[",", io_lib:fwrite("~w", [erl_parse:normalise(A_)])] || A_ <- As]],
")"]).
ret_trace(false, _, _, _, _) -> ok;
ret_trace(true, L, F, Args, Res) ->
io:fwrite("ct_expand (~w): returned from ~w/~w: ~w~n",
[L, F, length(Args), Res]).
[L, F, length(Args), Res]).
exception_trace(false, _, _, _, _) -> ok;
exception_trace(true, L, F, Args, Err) ->
@ -176,10 +171,10 @@ exception_trace(true, L, F, Args, Err) ->
lfun_rewrite(Exprs, Forms) ->
parse_trans:plain_transform(
fun({'fun',L,{function,F,A}}) ->
{function,_,_,_,Cs} = extract_fun(F, A, Forms),
{'fun',L,{clauses, Cs}};
(_) ->
continue
{function,_,_,_,Cs} = extract_fun(F, A, Forms),
{'fun',L,{clauses, Cs}};
(_) ->
continue
end, Exprs).
@ -190,15 +185,15 @@ lfun_rewrite(Exprs, Forms) ->
AbsTerm :: abstract_expr().
abstract(T) when is_function(T) ->
case erlang:fun_info(T, module) of
{module, erl_eval} ->
case erl_eval:fun_data(T) of
{fun_data, _Imports, Clauses} ->
{'fun', 0, {clauses, Clauses}};
false ->
erlang:error(function_clause) % mimicking erl_parse:abstract(T)
end;
_ ->
erlang:error(function_clause)
{module, erl_eval} ->
case erl_eval:fun_data(T) of
{fun_data, _Imports, Clauses} ->
{'fun', 0, {clauses, Clauses}};
false ->
erlang:error(function_clause) % mimicking erl_parse:abstract(T)
end;
_ ->
erlang:error(function_clause)
end;
abstract(T) when is_integer(T) -> {integer,0,T};
abstract(T) when is_float(T) -> {float,0,T};

772
src/exprecs.erl
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48
src/parse_trans.app.src
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@ -1,30 +1,32 @@
%%% -*- erlang -*-
%%% The contents of this file are subject to the Erlang Public License,
%%% Version 1.1, (the "License"); you may not use this file except in
%%% compliance with the License. You may obtain a copy of the License at
%%% http://www.erlang.org/EPLICENSE
%%%
%%% Software distributed under the License is distributed on an "AS IS"
%%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%%% the License for the specific language governing rights and limitations
%%% under the License.
%%%
%%% The Original Code is exprecs-0.2.
%%%
%%% The Initial Developer of the Original Code is Ericsson AB.
%%% Portions created by Ericsson are Copyright (C), 2006, Ericsson AB.
%%% All Rights Reserved.
%%%
%%% Contributor(s): ______________________________________.
%%% @author Ulf Wiger <ulf.wiger@feuerlabs.com>
%%% @doc This is a container for parse_trans modules.
%%% @end
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% --------------------------------------------------
%% This file is provided to you under the Apache License,
%% Version 2.0 (the "License"); you may not use this file
%% except in compliance with the License. You may obtain
%% a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing,
%% software distributed under the License is distributed on an
%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%% KIND, either express or implied. See the License for the
%% specific language governing permissions and limitations
%% under the License.
%% --------------------------------------------------
%%
%% @author Ulf Wiger <ulf@wiger.net>
%% @doc Parse transform library.
%% @end
{application, parse_trans,
[{description, "Parse transform library"},
{vsn, git},
{registered, []},
{applications, [kernel, stdlib, syntax_tools]},
{env, []}
{env, []},
{maintainers, ["Ulf Wiger"]},
{licenses, ["Apache 2.0"]},
{links, [{"Github", "https://github.com/uwiger/parse_trans"}]}
]}.

385
src/parse_trans.erl
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@ -1,35 +1,32 @@
%%% The contents of this file are subject to the Erlang Public License,
%%% Version 1.1, (the "License"); you may not use this file except in
%%% compliance with the License. You may obtain a copy of the License at
%%% http://www.erlang.org/EPLICENSE
%%%
%%% Software distributed under the License is distributed on an "AS IS"
%%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%%% the License for the specific language governing rights and limitations
%%% under the License.
%%%
%%% The Original Code is exprecs-0.2.
%%%
%%% The Initial Developer of the Original Code is Ericsson AB.
%%% Portions created by Ericsson are Copyright (C), 2006, Ericsson AB.
%%% All Rights Reserved.
%%%
%%% Contributor(s): ______________________________________.
%%%-------------------------------------------------------------------
%%% File : parse_trans.erl
%%% @author : Ulf Wiger <ulf.wiger@feuerlabs.com>
%%% @end
%%% Description :
%%%
%%% Created : 13 Feb 2006 by Ulf Wiger <ulf.wiger@feuerlabs.com> (then Ericsson)
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% --------------------------------------------------
%% This file is provided to you under the Apache License,
%% Version 2.0 (the "License"); you may not use this file
%% except in compliance with the License. You may obtain
%% a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing,
%% software distributed under the License is distributed on an
%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%% KIND, either express or implied. See the License for the
%% specific language governing permissions and limitations
%% under the License.
%% --------------------------------------------------
%% File : parse_trans.erl
%% @author : Ulf Wiger <ulf@wiger.net>
%% @end
%% Description :
%%
%% Created : 13 Feb 2006 by Ulf Wiger <ulf@wiger.net> (then Ericsson)
%%%-------------------------------------------------------------------
%%% @doc Generic parse transform library for Erlang.
%%%
%%% <p>...</p>
%%%
%%% @end
%% @doc Generic parse transform library for Erlang.
%%
%% <p>...</p>
%%
%% @end
-module(parse_trans).
@ -37,12 +34,12 @@
-export([
inspect/4,
transform/4,
transform/4,
depth_first/4,
revert/1,
revert_form/1,
format_exception/2, format_exception/3,
return/2
revert_form/1,
format_exception/2, format_exception/3,
return/2
]).
-export([
@ -55,13 +52,13 @@
do_inspect/4,
do_transform/4,
do_depth_first/4,
top/3
top/3
]).
-export([do_insert_forms/4,
replace_function/4,
replace_function/5,
export_function/3]).
replace_function/4,
replace_function/5,
export_function/3]).
-export([
context/2,
@ -85,8 +82,8 @@
]).
-record(context, {module,
function,
arity,
function,
arity,
file,
options}).
@ -97,7 +94,7 @@
-define(ERROR(R, F, I),
begin
Trace = erlang:get_stacktrace(),
Trace = erlang:get_stacktrace(),
rpt_error(R, F, I, Trace),
throw({error,get_pos(I),{R, Trace}})
end).
@ -110,11 +107,11 @@
-type options() :: [{atom(), any()}].
-type type() :: atom().
-type xform_f_rec() :: fun((type(), form(), #context{}, Acc) ->
{form(), boolean(), Acc}
| {forms(), form(), forms(), boolean(), Acc}).
{form(), boolean(), Acc}
| {forms(), form(), forms(), boolean(), Acc}).
-type xform_f_df() :: fun((type(), form(), #context{}, Acc) ->
{form(), Acc}
| {forms(), form(), forms(), Acc}).
{form(), Acc}
| {forms(), form(), forms(), Acc}).
-type insp_f() :: fun((type(), form(), #context{}, A) -> {boolean(), A}).
@ -173,17 +170,17 @@ plain_transform1(_, []) ->
[];
plain_transform1(Fun, [F|Fs]) when is_atom(element(1,F)) ->
case Fun(F) of
skip ->
plain_transform1(Fun, Fs);
continue ->
[list_to_tuple(plain_transform1(Fun, tuple_to_list(F))) |
plain_transform1(Fun, Fs)];
{done, NewF} ->
[NewF | Fs];
{error, Reason} ->
error(Reason, F, [{form, F}]);
NewF when is_tuple(NewF) ->
[NewF | plain_transform1(Fun, Fs)]
skip ->
plain_transform1(Fun, Fs);
continue ->
[list_to_tuple(plain_transform1(Fun, tuple_to_list(F))) |
plain_transform1(Fun, Fs)];
{done, NewF} ->
[NewF | Fs];
{error, Reason} ->
error(Reason, F, [{form, F}]);
NewF when is_tuple(NewF) ->
[NewF | plain_transform1(Fun, Fs)]
end;
plain_transform1(Fun, [L|Fs]) when is_list(L) ->
[plain_transform1(Fun, L) | plain_transform1(Fun, Fs)];
@ -204,10 +201,10 @@ plain_transform1(_, F) ->
integer().
get_pos(I) when is_list(I) ->
case proplists:get_value(form, I) of
undefined ->
?DUMMY_LINE;
Form ->
erl_syntax:get_pos(Form)
undefined ->
?DUMMY_LINE;
Form ->
erl_syntax:get_pos(Form)
end.
@ -243,7 +240,7 @@ get_module(Forms) ->
%%% @end
%%%
-spec get_attribute(atom(), [any()]) ->
'none' | [erl_syntax:syntaxTree()].
'none' | [erl_syntax:syntaxTree()].
%%
get_attribute(A, Forms) -> get_attribute(A,Forms,[erl_syntax:atom(undefined)]).
get_attribute(A, Forms, Undef) ->
@ -318,17 +315,17 @@ do(Transform, Fun, Acc, Forms, Options) ->
Context = initial_context(Forms, Options),
File = Context#context.file,
try Transform(Fun, Acc, Forms, Context) of
{NewForms, Acc1} when is_list(NewForms) ->
NewForms1 = optionally_renumber(NewForms, Options),
optionally_pretty_print(NewForms1, Options, Context),
{NewForms1, Acc1}
{NewForms, Acc1} when is_list(NewForms) ->
NewForms1 = optionally_renumber(NewForms, Options),
optionally_pretty_print(NewForms1, Options, Context),
{NewForms1, Acc1}
catch
error:Reason ->
{error,
[{File, [{?DUMMY_LINE, ?MODULE,
{Reason, erlang:get_stacktrace()}}]}]};
throw:{error, Ln, What} ->
{error, [{error, {Ln, ?MODULE, What}}]}
error:Reason ->
{error,
[{File, [{?DUMMY_LINE, ?MODULE,
{Reason, erlang:get_stacktrace()}}]}]};
throw:{error, Ln, What} ->
{error, [{error, {Ln, ?MODULE, What}}]}
end.
-spec top(function(), forms(), list()) ->
@ -337,18 +334,18 @@ top(F, Forms, Options) ->
Context = initial_context(Forms, Options),
File = Context#context.file,
try F(Forms, Context) of
{error, Reason} -> {error, Reason};
NewForms when is_list(NewForms) ->
NewForms1 = optionally_renumber(NewForms, Options),
{error, Reason} -> {error, Reason};
NewForms when is_list(NewForms) ->
NewForms1 = optionally_renumber(NewForms, Options),
optionally_pretty_print(NewForms1, Options, Context),
NewForms1
NewForms1
catch
error:Reason ->
{error,
[{File, [{?DUMMY_LINE, ?MODULE,
{Reason, erlang:get_stacktrace()}}]}]};
throw:{error, Ln, What} ->
{error, [{File, [{Ln, ?MODULE, What}]}], []}
throw:{error, Ln, What} ->
{error, [{File, [{Ln, ?MODULE, What}]}], []}
end.
replace_function(F, Arity, NewForm, Forms) ->
@ -356,39 +353,39 @@ replace_function(F, Arity, NewForm, Forms) ->
replace_function(F, Arity, NewForm, Forms, Opts) ->
{NewForms, _} =
do_transform(
fun(function, Form, _Ctxt, Acc) ->
case erl_syntax:revert(Form) of
{function, _, F, Arity, _} = RevForm ->
{[], NewForm, with_original_f(RevForm, Opts),
false, Acc};
_ ->
{Form, false, Acc}
end;
(_, Form, _Ctxt, Acc) ->
{Form, false, Acc}
end, false, Forms, initial_context(Forms, [])),
do_transform(
fun(function, Form, _Ctxt, Acc) ->
case erl_syntax:revert(Form) of
{function, _, F, Arity, _} = RevForm ->
{[], NewForm, with_original_f(RevForm, Opts),
false, Acc};
_ ->
{Form, false, Acc}
end;
(_, Form, _Ctxt, Acc) ->
{Form, false, Acc}
end, false, Forms, initial_context(Forms, [])),
revert(maybe_export_renamed(NewForms, Arity, Opts)).
with_original_f({function,_,_,_,_} = Form, Opts) ->
case lists:keyfind(rename_original, 1, Opts) of
{_, NewName} when is_atom(NewName) ->
[setelement(3, Form, NewName)];
_ ->
[]
{_, NewName} when is_atom(NewName) ->
[setelement(3, Form, NewName)];
_ ->
[]
end.
maybe_export_renamed(Forms, Arity, Opts) ->
case lists:keyfind(rename_original, 1, Opts) of
{_, NewName} when is_atom(NewName) ->
export_function(NewName, Arity, Forms);
_ ->
Forms
{_, NewName} when is_atom(NewName) ->
export_function(NewName, Arity, Forms);
_ ->
Forms
end.
export_function(F, Arity, Forms) ->
do_insert_forms(above, [{attribute, 1, export, [{F, Arity}]}], Forms,
initial_context(Forms, [])).
initial_context(Forms, [])).
-spec do_insert_forms(above | below, forms(), forms(), #context{}) ->
forms().
@ -420,12 +417,12 @@ optionally_pretty_print(Result, Options, Context) ->
DoLFs = option_value(pt_log_forms, Options, Result),
File = Context#context.file,
if DoLFs ->
Out1 = outfile(File, forms),
{ok,Fd} = file:open(Out1, [write]),
try lists:foreach(fun(F) -> io:fwrite(Fd, "~p.~n", [F]) end, Result)
after
ok = file:close(Fd)
end;
Out1 = outfile(File, forms),
{ok,Fd} = file:open(Out1, [write]),
try lists:foreach(fun(F) -> io:fwrite(Fd, "~p.~n", [F]) end, Result)
after
ok = file:close(Fd)
end;
true -> ok
end,
if DoPP ->
@ -437,12 +434,12 @@ optionally_pretty_print(Result, Options, Context) ->
optionally_renumber(Result, Options) ->
case option_value(pt_renumber, Options, Result) of
true ->
io:fwrite("renumbering...~n", []),
Rev = revert(Result),
renumber_(Rev);
false ->
Result
true ->
io:fwrite("renumbering...~n", []),
Rev = revert(Result),
renumber_(Rev);
false ->
Result
end.
renumber_(L) when is_list(L) ->
@ -453,15 +450,15 @@ renumber_(L, Acc) when is_list(L) ->
lists:mapfoldl(fun renumber_/2, Acc, L);
renumber_(T, Prev) when is_tuple(T) ->
case is_form(T) of
true ->
New = Prev+1,
T1 = setelement(2, T, New),
{Res, NewAcc} = renumber_(tuple_to_list(T1), New),
{list_to_tuple(Res), NewAcc};
false ->
L = tuple_to_list(T),
{Res, NewAcc} = renumber_(L, Prev),
{list_to_tuple(Res), NewAcc}
true ->
New = Prev+1,
T1 = setelement(2, T, New),
{Res, NewAcc} = renumber_(tuple_to_list(T1), New),
{list_to_tuple(Res), NewAcc};
false ->
L = tuple_to_list(T),
{Res, NewAcc} = renumber_(L, Prev),
{list_to_tuple(Res), NewAcc}
end;
renumber_(X, Prev) ->
{X, Prev}.
@ -469,10 +466,10 @@ renumber_(X, Prev) ->
is_form(T) when element(1,T)==type -> true;
is_form(T) ->
try erl_syntax:type(T),
true
true
catch
error:_ ->
false
error:_ ->
false
end.
option_value(Key, Options, Result) ->
@ -606,12 +603,12 @@ revert_form(F) ->
revert_form(F, W) ->
case erl_syntax:revert(F) of
{attribute,L,A,Tree} when element(1,Tree) == tree ->
{attribute,L,A,erl_syntax:revert(Tree)};
Result ->
if W -> fix_impl_fun(Result);
true -> Result
end
{attribute,L,A,Tree} when element(1,Tree) == tree ->
{attribute,L,A,erl_syntax:revert(Tree)};
Result ->
if W -> fix_impl_fun(Result);
true -> Result
end
end.
fix_impl_fun({'fun',L,{function,{atom,_,Fn},{integer,_,Ay}}}) ->
@ -627,26 +624,26 @@ fix_impl_fun(X) ->
needs_revert_workaround() ->
case application:get_env(parse_trans,revert_workaround) of
{ok, Bool} when is_boolean(Bool) -> Bool;
_ ->
Res = try lint_reverted()
catch
error:_ ->
true
end,
application:set_env(parse_trans,revert_workaround,Res),
Res
{ok, Bool} when is_boolean(Bool) -> Bool;
_ ->
Res = try lint_reverted()
catch
error:_ ->
true
end,
application:set_env(parse_trans,revert_workaround,Res),
Res
end.
lint_reverted() ->
Ts = [{attribute,1,module,m},
{attribute,2,export,[{f,0}]},
erl_syntax:function(erl_syntax:atom(f),
[erl_syntax:clause(
[],
[erl_syntax:implicit_fun(
erl_syntax:atom(f),
erl_syntax:integer(0))])])],
{attribute,2,export,[{f,0}]},
erl_syntax:function(erl_syntax:atom(f),
[erl_syntax:clause(
[],
[erl_syntax:implicit_fun(
erl_syntax:atom(f),
erl_syntax:integer(0))])])],
Rev = erl_syntax:revert_forms(Ts),
erl_lint:module(Rev),
false.
@ -675,23 +672,23 @@ lint_reverted() ->
%%% @end
return(Forms, Context) ->
JustForms = plain_transform(
fun({error,_}) -> skip;
({warning,_}) -> skip;
(_) -> continue
end, Forms),
fun({error,_}) -> skip;
({warning,_}) -> skip;
(_) -> continue
end, Forms),
File = case Context of
#context{file = F} -> F;
_ -> "parse_transform"
end,
#context{file = F} -> F;
_ -> "parse_transform"
end,
case {find_forms(Forms, error), find_forms(Forms, warning)} of
{[], []} ->
JustForms;
{[], Ws} ->
{warnings, JustForms, [{File, [W || {warning,W} <- Ws]}]};
{Es, Ws} ->
{error,
[{File, [E || {error,E} <- Es]}],
[{File, [W || {warning,W} <- Ws]}]}
{[], []} ->
JustForms;
{[], Ws} ->
{warnings, JustForms, [{File, [W || {warning,W} <- Ws]}]};
{Es, Ws} ->
{error,
[{File, [E || {error,E} <- Es]}],
[{File, [W || {warning,W} <- Ws]}]}
end.
find_forms([H|T], Tag) when element(1, H) == Tag ->
@ -731,18 +728,18 @@ format_exception(Class, Reason) ->
%%% @end
format_exception(Class, Reason, Lines) ->
PrintF = fun(Term, I) ->
io_lib_pretty:print(
Term, I, columns(), ?LINEMAX, ?CHAR_MAX,
record_print_fun())
end,
io_lib_pretty:print(
Term, I, columns(), ?LINEMAX, ?CHAR_MAX,
record_print_fun())
end,
StackF = fun(_, _, _) -> false end,
lines(Lines, lib:format_exception(
1, Class, Reason, erlang:get_stacktrace(), StackF, PrintF)).
1, Class, Reason, erlang:get_stacktrace(), StackF, PrintF)).
columns() ->
case io:columns() of
{ok, N} -> N;
_-> 80
{ok, N} -> N;
_-> 80
end.
lines(infinity, S) -> S;
@ -804,8 +801,8 @@ recurse(Form, Else, F) ->
do_transform(F, Acc, Forms, Context) ->
Rec = fun do_transform/4, % this function
F1 =
fun(Form, Acc0) ->
{Before1, Form1, After1, Recurse, Acc1} =
fun(Form, Acc0) ->
{Before1, Form1, After1, Recurse, Acc1} =
this_form_rec(F, Form, Context, Acc0),
if Recurse ->
{NewForm, NewAcc} =
@ -815,7 +812,7 @@ do_transform(F, Acc, Forms, Context) ->
true ->
{Before1, Form1, After1, Acc1}
end
end,
end,
mapfoldl(F1, Acc, Forms).
-spec do_depth_first(xform_f_df(), term(), forms(), #context{}) ->
@ -825,7 +822,7 @@ do_depth_first(F, Acc, Forms, Context) ->
F1 =
fun(Form, Acc0) ->
{NewForm, NewAcc} =
enter_subtrees(Form, F, Context, Acc0, Rec),
enter_subtrees(Form, F, Context, Acc0, Rec),
this_form_df(F, NewForm, Context, NewAcc)
end,
mapfoldl(F1, Acc, Forms).
@ -880,13 +877,13 @@ apply_F(F, Type, Form, Context, Acc) ->
update_context(Form, Context0) ->
case type(Form) of
function ->
{Fun, Arity} =
erl_syntax_lib:analyze_function(Form),
Context0#context{function = Fun,
arity = Arity};
_ ->
Context0
function ->
{Fun, Arity} =
erl_syntax_lib:analyze_function(Form),
Context0#context{function = Fun,
arity = Arity};
_ ->
Context0
end.
@ -897,12 +894,12 @@ update_context(Form, Context0) ->
%%% in question. The inserted forms are not transformed afterwards.
mapfoldl(F, Accu0, [Hd|Tail]) ->
{Before, Res, After, Accu1} =
case F(Hd, Accu0) of
{Be, _, Af, _} = Result when is_list(Be), is_list(Af) ->
Result;
{R1, A1} ->
{[], R1, [], A1}
end,
case F(Hd, Accu0) of
{Be, _, Af, _} = Result when is_list(Be), is_list(Af) ->
Result;
{R1, A1} ->
{[], R1, [], A1}
end,
{Rs, Accu2} = mapfoldl(F, Accu1, Tail),
{Before ++ [Res| After ++ Rs], Accu2};
mapfoldl(F, Accu, []) when is_function(F, 2) -> {[], Accu}.
@ -910,16 +907,16 @@ mapfoldl(F, Accu, []) when is_function(F, 2) -> {[], Accu}.
rpt_error(_Reason, _Fun, _Info, _Trace) ->
%% Fmt = lists:flatten(
%% ["*** ERROR in parse_transform function:~n"
%% "*** Reason = ~p~n",
%% ["*** ERROR in parse_transform function:~n"
%% "*** Reason = ~p~n",
%% "*** Location: ~p~n",
%% "*** Trace: ~p~n",
%% ["*** ~10w = ~p~n" || _ <- Info]]),
%% "*** Trace: ~p~n",
%% ["*** ~10w = ~p~n" || _ <- Info]]),
%% Args = [Reason, Fun, Trace |
%% lists:foldr(
%% fun({K,V}, Acc) ->
%% [K, V | Acc]
%% end, [], Info)],
%% lists:foldr(
%% fun({K,V}, Acc) ->
%% [K, V | Acc]
%% end, [], Info)],
%%io:format(Fmt, Args),
ok.
@ -927,10 +924,10 @@ rpt_error(_Reason, _Fun, _Info, _Trace) ->
iolist().
format_error({E, [{M,F,A}|_]} = Error) ->
try lists:flatten(io_lib:fwrite("~p in ~s:~s/~s", [E, atom_to_list(M),
atom_to_list(F), integer_to_list(A)]))
atom_to_list(F), integer_to_list(A)]))
catch
error:_ ->
format_error_(Error)
error:_ ->
format_error_(Error)
end;
format_error(Error) ->
format_error_(Error).

396
src/parse_trans_codegen.erl
View File

@ -1,33 +1,29 @@
%%% The contents of this file are subject to the Erlang Public License,
%%% Version 1.1, (the "License"); you may not use this file except in
%%% compliance with the License. You may obtain a copy of the License at
%%% http://www.erlang.org/EPLICENSE
%%%
%%% Software distributed under the License is distributed on an "AS IS"
%%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%%% the License for the specific language governing rights and limitations
%%% under the License.
%%%
%%% The Original Code is exprecs-0.2.
%%%
%%% The Initial Developer of the Original Code is Ericsson AB.
%%% Portions created by Ericsson are Copyright (C), 2006, Ericsson AB.
%%% All Rights Reserved.
%%%
%%% Contributor(s): ______________________________________.
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% --------------------------------------------------
%% This file is provided to you under the Apache License,
%% Version 2.0 (the "License"); you may not use this file
%% except in compliance with the License. You may obtain
%% a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing,
%% software distributed under the License is distributed on an
%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%% KIND, either express or implied. See the License for the
%% specific language governing permissions and limitations
%% under the License.
%% --------------------------------------------------
%% File : parse_trans_codegen.erl
%% @author : Ulf Wiger <ulf@wiger.net>
%% @end
%%-------------------------------------------------------------------
%%%-------------------------------------------------------------------
%%% File : parse_trans_codegen.erl
%%% @author : Ulf Wiger <ulf@feuerlabs.com>
%%% @end
%%% Description :
%%%-------------------------------------------------------------------
%%% @doc Parse transform for code generation pseduo functions
%%%
%%% <p>...</p>
%%%
%%% @end
%% @doc Parse transform for code generation pseduo functions
%%
%% <p>...</p>
%%
%% @end
-module(parse_trans_codegen).
@ -150,100 +146,100 @@
parse_transform(Forms, Options) ->
Context = parse_trans:initial_context(Forms, Options),
{NewForms, _} =
parse_trans:do_depth_first(
fun xform_fun/4, _Acc = Forms, Forms, Context),
parse_trans:do_depth_first(
fun xform_fun/4, _Acc = Forms, Forms, Context),
parse_trans:return(parse_trans:revert(NewForms), Context).
xform_fun(application, Form, _Ctxt, Acc) ->
MFA = erl_syntax_lib:analyze_application(Form),
L = erl_syntax:get_pos(Form),
case MFA of
{codegen, {gen_module, 3}} ->
[NameF, ExportsF, FunsF] =
erl_syntax:application_arguments(Form),
NewForms = gen_module(NameF, ExportsF, FunsF, L, Acc),
{NewForms, Acc};
{codegen, {gen_function, 2}} ->
[NameF, FunF] =
erl_syntax:application_arguments(Form),
NewForm = gen_function(NameF, FunF, L, L, Acc),
{NewForm, Acc};
{codegen, {gen_function, 3}} ->
[NameF, FunF, LineF] =
erl_syntax:application_arguments(Form),
NewForm = gen_function(
NameF, FunF, L, erl_syntax:integer_value(LineF), Acc),
{NewForm, Acc};
{codegen, {gen_function_alt, 3}} ->
[NameF, FunF, AltF] =
erl_syntax:application_arguments(Form),
NewForm = gen_function_alt(NameF, FunF, AltF, L, L, Acc),
{NewForm, Acc};
{codegen, {gen_functions, 1}} ->
[List] = erl_syntax:application_arguments(Form),
Elems = erl_syntax:list_elements(List),
NewForms = lists:map(
fun(E) ->
[NameF, FunF] = erl_syntax:tuple_elements(E),
gen_function(NameF, FunF, L, L, Acc)
end, Elems),
{erl_syntax:list(NewForms), Acc};
{codegen, {exprs, 1}} ->
[FunF] = erl_syntax:application_arguments(Form),
[Clause] = erl_syntax:fun_expr_clauses(FunF),
[{clause,_,_,_,Body}] = parse_trans:revert([Clause]),
NewForm = substitute(erl_parse:abstract(Body)),
{NewForm, Acc};
_ ->
{Form, Acc}
{codegen, {gen_module, 3}} ->
[NameF, ExportsF, FunsF] =
erl_syntax:application_arguments(Form),
NewForms = gen_module(NameF, ExportsF, FunsF, L, Acc),
{NewForms, Acc};
{codegen, {gen_function, 2}} ->
[NameF, FunF] =
erl_syntax:application_arguments(Form),
NewForm = gen_function(NameF, FunF, L, L, Acc),
{NewForm, Acc};
{codegen, {gen_function, 3}} ->
[NameF, FunF, LineF] =
erl_syntax:application_arguments(Form),
NewForm = gen_function(
NameF, FunF, L, erl_syntax:integer_value(LineF), Acc),
{NewForm, Acc};
{codegen, {gen_function_alt, 3}} ->
[NameF, FunF, AltF] =
erl_syntax:application_arguments(Form),
NewForm = gen_function_alt(NameF, FunF, AltF, L, L, Acc),
{NewForm, Acc};
{codegen, {gen_functions, 1}} ->
[List] = erl_syntax:application_arguments(Form),
Elems = erl_syntax:list_elements(List),
NewForms = lists:map(
fun(E) ->
[NameF, FunF] = erl_syntax:tuple_elements(E),
gen_function(NameF, FunF, L, L, Acc)
end, Elems),
{erl_syntax:list(NewForms), Acc};
{codegen, {exprs, 1}} ->
[FunF] = erl_syntax:application_arguments(Form),
[Clause] = erl_syntax:fun_expr_clauses(FunF),
[{clause,_,_,_,Body}] = parse_trans:revert([Clause]),
NewForm = substitute(erl_parse:abstract(Body)),
{NewForm, Acc};
_ ->
{Form, Acc}
end;
xform_fun(_, Form, _Ctxt, Acc) ->
{Form, Acc}.
gen_module(NameF, ExportsF, FunsF, L, Acc) ->
case erl_syntax:type(FunsF) of
list ->
try gen_module_(NameF, ExportsF, FunsF, L, Acc)
catch
error:E ->
ErrStr = parse_trans:format_exception(error, E),
{error, {L, ?MODULE, ErrStr}}
end;
_ ->
ErrStr = parse_trans:format_exception(
error, "Argument must be a list"),
{error, {L, ?MODULE, ErrStr}}
list ->
try gen_module_(NameF, ExportsF, FunsF, L, Acc)
catch
error:E ->
ErrStr = parse_trans:format_exception(error, E),
{error, {L, ?MODULE, ErrStr}}
end;
_ ->
ErrStr = parse_trans:format_exception(
error, "Argument must be a list"),
{error, {L, ?MODULE, ErrStr}}
end.
gen_module_(NameF, ExportsF, FunsF, L0, Acc) ->
P = erl_syntax:get_pos(NameF),
ModF = case parse_trans:revert_form(NameF) of
{atom,_,_} = Am -> Am;
{tuple,_,[{atom,_,'$var'},
{var,_,V}]} ->
{var,P,V}
end,
{atom,_,_} = Am -> Am;
{tuple,_,[{atom,_,'$var'},
{var,_,V}]} ->
{var,P,V}
end,
cons(
{cons,P,
{tuple,P,
[{atom,P,attribute},
{integer,P,1},
{atom,P,module},
ModF]},
[{atom,P,attribute},
{integer,P,1},
{atom,P,module},
ModF]},
substitute(
abstract(
[{attribute,P,export,
lists:map(
fun(TupleF) ->
[F,A] = erl_syntax:tuple_elements(TupleF),
{erl_syntax:atom_value(F), erl_syntax:integer_value(A)}
end, erl_syntax:list_elements(ExportsF))}]))},
abstract(
[{attribute,P,export,
lists:map(
fun(TupleF) ->
[F,A] = erl_syntax:tuple_elements(TupleF),
{erl_syntax:atom_value(F), erl_syntax:integer_value(A)}
end, erl_syntax:list_elements(ExportsF))}]))},
lists:map(
fun(FTupleF) ->
Pos = erl_syntax:get_pos(FTupleF),
[FName, FFunF] = erl_syntax:tuple_elements(FTupleF),
gen_function(FName, FFunF, L0, Pos, Acc)
end, erl_syntax:list_elements(FunsF))).
fun(FTupleF) ->
Pos = erl_syntax:get_pos(FTupleF),
[FName, FFunF] = erl_syntax:tuple_elements(FTupleF),
gen_function(FName, FFunF, L0, Pos, Acc)
end, erl_syntax:list_elements(FunsF))).
cons({cons,L,H,T}, L2) ->
{cons,L,H,cons(T, L2)};
@ -258,80 +254,80 @@ cons({nil,L}, []) ->
gen_function(NameF, FunF, L0, L, Acc) ->
try gen_function_(NameF, FunF, [], L, Acc)
catch
error:E ->
ErrStr = parse_trans:format_exception(error, E),
{error, {L0, ?MODULE, ErrStr}}
error:E ->
ErrStr = parse_trans:format_exception(error, E),
{error, {L0, ?MODULE, ErrStr}}
end.
gen_function_alt(NameF, FunF, AltF, L0, L, Acc) ->
try gen_function_(NameF, FunF, AltF, L, Acc)
catch
error:E ->
ErrStr = parse_trans:format_exception(error, E),
{error, {L0, ?MODULE, ErrStr}}
error:E ->
ErrStr = parse_trans:format_exception(error, E),
{error, {L0, ?MODULE, ErrStr}}
end.
gen_function_(NameF, FunF, AltF, L, Acc) ->
case erl_syntax:type(FunF) of
T when T==implicit_fun; T==fun_expr ->
{Arity, Clauses} = gen_function_clauses(T, NameF, FunF, L, Acc),
{tuple, 1, [{atom, 1, function},
{integer, 1, L},
NameF,
{integer, 1, Arity},
substitute(abstract(Clauses))]};
list_comp ->
%% Extract the fun from the LC
[Template] = parse_trans:revert(
[erl_syntax:list_comp_template(FunF)]),
%% Process fun in the normal fashion (as above)
{Arity, Clauses} = gen_function_clauses(erl_syntax:type(Template),
NameF, Template, L, Acc),
Body = erl_syntax:list_comp_body(FunF),
%% Collect all variables from the LC generator(s)
%% We want to produce an abstract representation of something like:
%% {function,1,Name,Arity,
%% lists:flatten(
%% [(fun(V1,V2,...) ->
%% ...
%% end)(__V1,__V2,...) || {__V1,__V2,...} <- L])}
%% where the __Vn vars are our renamed versions of the LC generator
%% vars. This allows us to instantiate the clauses at run-time.
Vars = lists:flatten(
[sets:to_list(erl_syntax_lib:variables(
erl_syntax:generator_pattern(G)))
|| G <- Body]),
Vars1 = [list_to_atom("__" ++ atom_to_list(V)) || V <- Vars],
VarMap = lists:zip(Vars, Vars1),
Body1 =
[erl_syntax:generator(
rename_vars(VarMap, gen_pattern(G)),
gen_body(G)) || G <- Body],
[RevLC] = parse_trans:revert(
[erl_syntax:list_comp(
{call, 1,
{'fun',1,
{clauses,
[{clause,1,[{var,1,V} || V <- Vars],[],
[substitute(
abstract(Clauses))]
}]}
}, [{var,1,V} || V <- Vars1]}, Body1)]),
AltC = case AltF of
[] -> {nil,1};
_ ->
{Arity, AltC1} = gen_function_clauses(
erl_syntax:type(AltF),
NameF, AltF, L, Acc),
substitute(abstract(AltC1))
end,
{tuple,1,[{atom,1,function},
{integer, 1, L},
NameF,
{integer, 1, Arity},
{call, 1, {remote, 1, {atom, 1, lists},
{atom,1,flatten}},
[{op, 1, '++', RevLC, AltC}]}]}
T when T==implicit_fun; T==fun_expr ->
{Arity, Clauses} = gen_function_clauses(T, NameF, FunF, L, Acc),
{tuple, 1, [{atom, 1, function},
{integer, 1, L},
NameF,
{integer, 1, Arity},
substitute(abstract(Clauses))]};
list_comp ->
%% Extract the fun from the LC
[Template] = parse_trans:revert(
[erl_syntax:list_comp_template(FunF)]),
%% Process fun in the normal fashion (as above)
{Arity, Clauses} = gen_function_clauses(erl_syntax:type(Template),
NameF, Template, L, Acc),
Body = erl_syntax:list_comp_body(FunF),
%% Collect all variables from the LC generator(s)
%% We want to produce an abstract representation of something like:
%% {function,1,Name,Arity,
%% lists:flatten(
%% [(fun(V1,V2,...) ->
%% ...
%% end)(__V1,__V2,...) || {__V1,__V2,...} <- L])}
%% where the __Vn vars are our renamed versions of the LC generator
%% vars. This allows us to instantiate the clauses at run-time.
Vars = lists:flatten(
[sets:to_list(erl_syntax_lib:variables(
erl_syntax:generator_pattern(G)))
|| G <- Body]),
Vars1 = [list_to_atom("__" ++ atom_to_list(V)) || V <- Vars],
VarMap = lists:zip(Vars, Vars1),
Body1 =
[erl_syntax:generator(
rename_vars(VarMap, gen_pattern(G)),
gen_body(G)) || G <- Body],
[RevLC] = parse_trans:revert(
[erl_syntax:list_comp(
{call, 1,
{'fun',1,
{clauses,
[{clause,1,[{var,1,V} || V <- Vars],[],
[substitute(
abstract(Clauses))]
}]}
}, [{var,1,V} || V <- Vars1]}, Body1)]),
AltC = case AltF of
[] -> {nil,1};
_ ->
{Arity, AltC1} = gen_function_clauses(
erl_syntax:type(AltF),
NameF, AltF, L, Acc),
substitute(abstract(AltC1))
end,
{tuple,1,[{atom,1,function},
{integer, 1, L},
NameF,
{integer, 1, Arity},
{call, 1, {remote, 1, {atom, 1, lists},
{atom,1,flatten}},
[{op, 1, '++', RevLC, AltC}]}]}
end.
gen_pattern(G) ->
@ -343,21 +339,21 @@ gen_body(G) ->
rename_vars(Vars, Tree) ->
erl_syntax_lib:map(
fun(T) ->
case erl_syntax:type(T) of
variable ->
V = erl_syntax:variable_name(T),
{_,V1} = lists:keyfind(V,1,Vars),
erl_syntax:variable(V1);
_ ->
T
end
case erl_syntax:type(T) of
variable ->
V = erl_syntax:variable_name(T),
{_,V1} = lists:keyfind(V,1,Vars),
erl_syntax:variable(V1);
_ ->
T
end
end, Tree).
gen_function_clauses(implicit_fun, _NameF, FunF, _L, Acc) ->
AQ = erl_syntax:implicit_fun_name(FunF),
Name = erl_syntax:atom_value(erl_syntax:arity_qualifier_body(AQ)),
Arity = erl_syntax:integer_value(
erl_syntax:arity_qualifier_argument(AQ)),
erl_syntax:arity_qualifier_argument(AQ)),
NewForm = find_function(Name, Arity, Acc),
ClauseForms = erl_syntax:function_clauses(NewForm),
{Arity, ClauseForms};
@ -368,32 +364,32 @@ gen_function_clauses(fun_expr, _NameF, FunF, _L, _Acc) ->
find_function(Name, Arity, Forms) ->
[Form] = [F || {function,_,N,A,_} = F <- Forms,
N == Name,
A == Arity],
N == Name,
A == Arity],
Form.
abstract(ClauseForms) ->
erl_parse:abstract(parse_trans:revert(ClauseForms)).
substitute({tuple,L0,
[{atom,_,tuple},
{integer,_,L},
{cons,_,
{tuple,_,[{atom,_,atom},{integer,_,_},{atom,_,'$var'}]},
{cons,_,
{tuple,_,[{atom,_,var},{integer,_,_},{atom,_,V}]},
{nil,_}}}]}) ->
[{atom,_,tuple},
{integer,_,L},
{cons,_,
{tuple,_,[{atom,_,atom},{integer,_,_},{atom,_,'$var'}]},
{cons,_,
{tuple,_,[{atom,_,var},{integer,_,_},{atom,_,V}]},
{nil,_}}}]}) ->
{call, L0, {remote,L0,{atom,L0,erl_parse},
{atom,L0,abstract}},
{atom,L0,abstract}},
[{var, L0, V}, {integer, L0, L}]};
substitute({tuple,L0,
[{atom,_,tuple},
{integer,_,_},
{cons,_,
{tuple,_,[{atom,_,atom},{integer,_,_},{atom,_,'$form'}]},
{cons,_,
{tuple,_,[{atom,_,var},{integer,_,_},{atom,_,F}]},
{nil,_}}}]}) ->
[{atom,_,tuple},
{integer,_,_},
{cons,_,
{tuple,_,[{atom,_,atom},{integer,_,_},{atom,_,'$form'}]},
{cons,_,
{tuple,_,[{atom,_,var},{integer,_,_},{atom,_,F}]},
{nil,_}}}]}) ->
{var, L0, F};
substitute([]) ->
[];
@ -407,17 +403,17 @@ substitute(X) ->
get_arity(Clauses) ->
Ays = [length(erl_syntax:clause_patterns(C)) || C <- Clauses],
case lists:usort(Ays) of
[Ay] ->
Ay;
Other ->
erlang:error(ambiguous, Other)
[Ay] ->
Ay;
Other ->
erlang:error(ambiguous, Other)
end.
format_error(E) ->
case io_lib:deep_char_list(E) of
true ->
E;
_ ->
io_lib:write(E)
true ->
E;
_ ->
io_lib:write(E)
end.

14
src/parse_trans_mod.erl
View File

@ -41,14 +41,14 @@ transform_module(Mod, PT, Options) ->
Forms = abstract_code(File),
Context = parse_trans:initial_context(Forms, Options),
PTMods = if is_atom(PT) -> [PT];
is_function(PT, 2) -> [PT];
is_list(PT) -> PT
end,
is_function(PT, 2) -> [PT];
is_list(PT) -> PT
end,
Transformed = lists:foldl(fun(PTx, Fs) when is_function(PTx, 2) ->
PTx(Fs, Options);
(PTMod, Fs) ->
PTMod:parse_transform(Fs, Options)
end, Forms, PTMods),
PTx(Fs, Options);
(PTMod, Fs) ->
PTMod:parse_transform(Fs, Options)
end, Forms, PTMods),
parse_trans:optionally_pretty_print(Transformed, Options, Context),
compile_and_load_forms(Transformed, get_compile_options(Options)).

85
src/parse_trans_pp.erl
View File

@ -1,45 +1,42 @@
%%% The contents of this file are subject to the Erlang Public License,
%%% Version 1.1, (the "License"); you may not use this file except in
%%% compliance with the License. You may obtain a copy of the License at
%%% http://www.erlang.org/EPLICENSE
%%%
%%% Software distributed under the License is distributed on an "AS IS"
%%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%%% the License for the specific language governing rights and limitations
%%% under the License.
%%%
%%% The Original Code is exprecs-0.2.
%%%
%%% The Initial Developer of the Original Code is Ericsson AB.
%%% Portions created by Ericsson are Copyright (C), 2006, Ericsson AB.
%%% All Rights Reserved.
%%%
%%% Contributor(s): ______________________________________.
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% --------------------------------------------------
%% This file is provided to you under the Apache License,
%% Version 2.0 (the "License"); you may not use this file
%% except in compliance with the License. You may obtain
%% a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing,
%% software distributed under the License is distributed on an
%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%% KIND, either express or implied. See the License for the
%% specific language governing permissions and limitations
%% under the License.
%% --------------------------------------------------
%% File : parse_trans_pp.erl
%% @author : Ulf Wiger <ulf@wiger.net>
%% @end
%% Description :
%%
%% Created : 3 Aug 2010 by Ulf Wiger <ulf@wiger.net>
%% --------------------------------------------------
%%%-------------------------------------------------------------------
%%% File : parse_trans_pp.erl
%%% @author : Ulf Wiger <ulf@feuerlabs.com>
%%% @end
%%% Description :
%%%
%%% Created : 3 Aug 2010 by Ulf Wiger <ulf@feuerlabs.com>
%%%-------------------------------------------------------------------
%%% @doc Generic parse transform library for Erlang.
%%%
%%% This module contains some useful utility functions for inspecting
%%% the results of parse transforms or code generation.
%%% The function `main/1' is called from escript, and can be used to
%%% pretty-print debug info in a .beam file from a Linux shell.
%%%
%%% Using e.g. the following bash alias:
%%% <pre>
%%% alias pp='escript $PARSE_TRANS_ROOT/ebin/parse_trans_pp.beam'
%% @doc Generic parse transform library for Erlang.
%%
%% This module contains some useful utility functions for inspecting
%% the results of parse transforms or code generation.
%% The function `main/1' is called from escript, and can be used to
%% pretty-print debug info in a .beam file from a Linux shell.
%%
%% Using e.g. the following bash alias:
%% <pre>
%% alias pp='escript $PARSE_TRANS_ROOT/ebin/parse_trans_pp.beam'
%%% </pre>
%%% a file could be pretty-printed using the following command:
%%%
%%% `$ pp ex_codegen.beam | less'
%%% @end
%% a file could be pretty-printed using the following command:
%%
%% `$ pp ex_codegen.beam | less'
%% @end
-module(parse_trans_pp).
@ -103,13 +100,13 @@ pp_beam(F, Out) ->
pp_beam_to_str(F) ->
case beam_lib:chunks(F, [abstract_code]) of
{ok, {_, [{abstract_code,{_,AC0}}]}} ->
AC = epp:restore_typed_record_fields(AC0),
AC = epp:restore_typed_record_fields(AC0),
{ok, lists:flatten(
%% io_lib:fwrite("~s~n", [erl_prettypr:format(
%% erl_syntax:form_list(AC))])
io_lib:fwrite("~s~n", [lists:flatten(
[erl_pp:form(Form) ||
Form <- AC])])
io_lib:fwrite("~s~n", [lists:flatten(
[erl_pp:form(Form) ||
Form <- AC])])
)};
Other ->
{error, Other}