-
Notifications
You must be signed in to change notification settings - Fork 168
/
proper_transformer.erl
387 lines (352 loc) · 16.1 KB
/
proper_transformer.erl
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
%%% Copyright 2010-2013 Manolis Papadakis <manopapad@gmail.com>,
%%% Eirini Arvaniti <eirinibob@gmail.com>
%%% and Kostis Sagonas <kostis@cs.ntua.gr>
%%%
%%% This file is part of PropEr.
%%%
%%% PropEr is free software: you can redistribute it and/or modify
%%% it under the terms of the GNU General Public License as published by
%%% the Free Software Foundation, either version 3 of the License, or
%%% (at your option) any later version.
%%%
%%% PropEr is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
%%% GNU General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License
%%% along with PropEr. If not, see <http://www.gnu.org/licenses/>.
%%% @copyright 2010-2013 Manolis Papadakis, Eirini Arvaniti and Kostis Sagonas
%%% @version {@version}
%%% @author Manolis Papadakis
%%% @doc PropEr's main parse transform. It is automatically applied to modules
%%% when including the main PropEr header, unless `PROPER_NO_TRANS' is defined.
%%% Applying this transform has the following effects:
%%% <ul>
%%% <li>All 0-arity functions whose name begins with `prop_' are automatically
%%% exported.</li>
%%% <li>Type declarations in `?FORALL's that correspond to native types are
%%% properly substituted (with some limitations, see the
%%% {@link proper_typeserver} module for details).</li>
%%% </ul>
-module(proper_transformer).
-export([parse_transform/2]).
-export_type([]).
-include("proper_internal.hrl").
%%------------------------------------------------------------------------------
%% Types
%%------------------------------------------------------------------------------
-record(mod_info, {name :: mod_name(),
export_all = false :: boolean(),
funs = sets:new() :: proper_typeserver:mod_exp_funs(),
imports = sets:new() :: proper_typeserver:mod_exp_funs(),
no_autos = sets:new() :: proper_typeserver:mod_exp_funs(),
exp_types = sets:new() :: proper_typeserver:mod_exp_types(),
exp_funs = sets:new() :: proper_typeserver:mod_exp_funs(),
helper_pid :: pid()}).
-type mod_info() :: #mod_info{}.
-type exp_dict() :: dict().
%% dict(mod_name(),'no_data' | {'data',proper_typeserver:mod_exp_types(),
%% proper_typeserver:mod_exp_funs()})
%%------------------------------------------------------------------------------
%% Top-level functions
%%------------------------------------------------------------------------------
%% @private
-spec parse_transform([abs_form()], [compile:option()]) -> [abs_form()].
parse_transform(Forms, Options) ->
RawModInfo = collect_info(Forms, Options),
#mod_info{name = ModName, export_all = ExportAll, funs = AllFuns,
exp_types = ExpTypes, exp_funs = RawExpFuns} = RawModInfo,
{ExpFuns,PropsToExport} =
case ExportAll of
true ->
{AllFuns, []};
false ->
AllProps = sets:filter(fun is_prop/1, AllFuns),
{RawExpFuns, sets:to_list(sets:subtract(AllProps,RawExpFuns))}
end,
HelperPid = helper_start(ModName, ExpTypes, ExpFuns),
ModInfo = RawModInfo#mod_info{helper_pid = HelperPid},
NewForms = [rewrite_form(F,ModInfo) || F <- Forms],
helper_stop(HelperPid),
add_exports(NewForms, PropsToExport).
-spec collect_info([abs_form()], [compile:option()]) -> mod_info().
collect_info(Forms, Options) ->
StartModInfo = add_options(#mod_info{}, Options),
lists:foldl(fun add_info/2, StartModInfo, Forms).
-spec add_options(mod_info(), compile:option() | [compile:option()]) ->
mod_info().
add_options(ModInfo, []) ->
ModInfo;
add_options(ModInfo, [export_all | Rest]) ->
add_options(ModInfo#mod_info{export_all = true}, Rest);
add_options(#mod_info{no_autos = NoAutos} = ModInfo,
[{no_auto_import,FunsList} | Rest]) ->
NewNoAutos = sets:union(sets:from_list(FunsList), NoAutos),
add_options(ModInfo#mod_info{no_autos = NewNoAutos}, Rest);
add_options(ModInfo, [_OtherOption | Rest]) ->
add_options(ModInfo, Rest);
add_options(ModInfo, SingleOption) ->
add_options(ModInfo, [SingleOption]).
-spec add_info(abs_form(), mod_info()) -> mod_info().
add_info({attribute,_Line,module,ModName}, ModInfo) ->
ModInfo#mod_info{name = ModName};
add_info({function,_Line,Name,Arity,_Clauses},
#mod_info{funs = Funs} = ModInfo) ->
NewFuns = sets:add_element({Name,Arity}, Funs),
ModInfo#mod_info{funs = NewFuns};
add_info({attribute,_Line,import,{_FromMod,MoreImports}},
#mod_info{imports = Imports} = ModInfo) ->
NewImports = sets:union(sets:from_list(MoreImports), Imports),
ModInfo#mod_info{imports = NewImports};
add_info({attribute,_Line,export_type,MoreExpTypes},
#mod_info{exp_types = ExpTypes} = ModInfo) ->
NewExpTypes = sets:union(sets:from_list(MoreExpTypes), ExpTypes),
ModInfo#mod_info{exp_types = NewExpTypes};
add_info({attribute,_Line,export,MoreExpFuns},
#mod_info{exp_funs = ExpFuns} = ModInfo) ->
NewExpFuns = sets:union(sets:from_list(MoreExpFuns), ExpFuns),
ModInfo#mod_info{exp_funs = NewExpFuns};
add_info({attribute,_Line,compile,Options}, ModInfo) ->
add_options(ModInfo, Options);
add_info(_Form, ModInfo) ->
ModInfo.
-spec is_prop({fun_name(),arity()}) -> boolean().
is_prop({Name,0}) ->
lists:prefix(?PROPERTY_PREFIX, atom_to_list(Name));
is_prop(_) ->
false.
-spec add_exports([abs_form()], [{fun_name(),arity()}]) -> [abs_form()].
add_exports(Forms, ToExport) ->
add_exports_tr(Forms, [], ToExport).
-spec add_exports_tr([abs_form()], [abs_form()], [{fun_name(),arity()}]) ->
[abs_form()].
add_exports_tr([], Acc, _ToExport) ->
lists:reverse(Acc);
add_exports_tr([{attribute,_,module,_} = ModAttr | Rest], Acc, ToExport) ->
ExpAttr = {attribute,0,export,ToExport},
lists:reverse(Acc) ++ [ModAttr, ExpAttr | Rest];
add_exports_tr([Form | Rest], Acc, ToExport) ->
add_exports_tr(Rest, [Form | Acc], ToExport).
%%------------------------------------------------------------------------------
%% Helper server interface
%%------------------------------------------------------------------------------
-spec helper_start(mod_name(), proper_typeserver:mod_exp_types(),
proper_typeserver:mod_exp_funs()) -> pid().
helper_start(Mod, ModExpTypes, ModExpFuns) ->
spawn(fun() -> helper_init(Mod,ModExpTypes,ModExpFuns) end).
-spec helper_stop(pid()) -> 'ok'.
helper_stop(HelperPid) ->
HelperPid ! stop,
ok.
-spec is_exported_type(mod_name(), atom(), arity(), pid()) -> boolean().
is_exported_type(Mod, Call, Arity, HelperPid) ->
HelperPid ! {is_exported_type,self(),Mod,Call,Arity},
receive
Answer -> Answer
end.
-spec helper_init(mod_name(), proper_typeserver:mod_exp_types(),
proper_typeserver:mod_exp_funs()) -> 'ok'.
helper_init(Mod, ModExpTypes, ModExpFuns) ->
ExpDict = dict:from_list([{Mod,{data,ModExpTypes,ModExpFuns}}]),
helper_loop(ExpDict).
-spec helper_loop(exp_dict()) -> 'ok'.
helper_loop(ExpDict) ->
receive
stop ->
ok;
{is_exported_type,From,Mod,Call,Arity} ->
NewExpDict = add_module(Mod, ExpDict),
Answer = case dict:fetch(Mod, NewExpDict) of
{data,ModExpTypes,ModExpFuns} ->
CallRef = {Call,Arity},
not sets:is_element(CallRef, ModExpFuns)
andalso sets:is_element(CallRef, ModExpTypes);
nodata ->
false
end,
From ! Answer,
helper_loop(NewExpDict)
end.
-spec add_module(mod_name(), exp_dict()) -> exp_dict().
add_module(Mod, ExpDict) ->
case dict:is_key(Mod, ExpDict) of
true ->
ExpDict;
false ->
case proper_typeserver:get_exp_info(Mod) of
{ok,ModExpTypes,ModExpFuns} ->
dict:store(Mod, {data,ModExpTypes,ModExpFuns}, ExpDict);
{error,_Reason} ->
dict:store(Mod, nodata, ExpDict)
end
end.
%%------------------------------------------------------------------------------
%% ?FORALL detection functions
%%------------------------------------------------------------------------------
-spec rewrite_form(abs_form(), mod_info()) -> abs_form().
rewrite_form({attribute,Line,record,{RecName,FieldInits}}, ModInfo) ->
NewFieldInits = [rewrite_field_init(F,ModInfo) || F <- FieldInits],
{attribute,Line,record,{RecName,NewFieldInits}};
rewrite_form({function,Line,Name,Arity,Clauses}, ModInfo) ->
NewClauses = [rewrite_clause(C,ModInfo) || C <- Clauses],
{function,Line,Name,Arity,NewClauses};
rewrite_form(Form, _ModInfo) ->
Form.
-spec rewrite_field_init(abs_rec_field(), mod_info()) -> abs_rec_field().
rewrite_field_init({record_field,_Line,_FieldName} = FieldInit, _ModInfo) ->
FieldInit;
rewrite_field_init({record_field,Line,FieldName,InitExpr}, ModInfo) ->
{record_field,Line,FieldName,rewrite_expr(InitExpr,ModInfo)}.
-spec rewrite_clause(abs_clause(), mod_info()) -> abs_clause().
rewrite_clause({clause,Line,PatSeq,Guards,Body}, ModInfo) ->
NewPatSeq = [rewrite_expr(P,ModInfo) || P <- PatSeq],
NewBody = [rewrite_expr(E,ModInfo) || E <- Body],
{clause,Line,NewPatSeq,Guards,NewBody}.
%% This also covers some other constructs that don't clash with expressions:
%% binary element specifications, list and binary comprehension generators and
%% filters, remote function references. It also covers patterns.
-spec rewrite_expr(abs_expr(), mod_info()) -> abs_expr().
rewrite_expr({match,Line,Pattern,Expr}, ModInfo) ->
NewPattern = rewrite_expr(Pattern, ModInfo),
NewExpr = rewrite_expr(Expr, ModInfo),
{match,Line,NewPattern,NewExpr};
rewrite_expr({tuple,Line,FieldExprs}, ModInfo) ->
NewFieldExprs = [rewrite_expr(F,ModInfo) || F <- FieldExprs],
{tuple,Line,NewFieldExprs};
rewrite_expr({cons,Line,HeadExpr,TailExpr}, ModInfo) ->
NewHeadExpr = rewrite_expr(HeadExpr, ModInfo),
NewTailExpr = rewrite_expr(TailExpr, ModInfo),
{cons,Line,NewHeadExpr,NewTailExpr};
rewrite_expr({bin,Line,BinElems}, ModInfo) ->
NewBinElems = [rewrite_expr(B,ModInfo) || B <- BinElems],
{bin,Line,NewBinElems};
rewrite_expr({bin_element,Line,ValueExpr,Size,TSL}, ModInfo) ->
{bin_element,Line,rewrite_expr(ValueExpr,ModInfo),Size,TSL};
rewrite_expr({op,Line,Op,LeftExpr,RightExpr}, ModInfo) ->
NewLeftExpr = rewrite_expr(LeftExpr, ModInfo),
NewRightExpr = rewrite_expr(RightExpr, ModInfo),
{op,Line,Op,NewLeftExpr,NewRightExpr};
rewrite_expr({op,Line,Op,Expr}, ModInfo) ->
{op,Line,Op,rewrite_expr(Expr,ModInfo)};
rewrite_expr({record,Line,RecName,FieldInits}, ModInfo) ->
NewFieldInits = [rewrite_field_init(F,ModInfo) || F <- FieldInits],
{record,Line,RecName,NewFieldInits};
rewrite_expr({record,Line,RecExpr,RecName,FieldInits}, ModInfo) ->
NewRecExpr = rewrite_expr(RecExpr, ModInfo),
NewFieldInits = [rewrite_field_init(F,ModInfo) || F <- FieldInits],
{record,Line,NewRecExpr,RecName,NewFieldInits};
rewrite_expr({record_field,Line,RecExpr,RecName,FieldName}, ModInfo) ->
{record_field,Line,rewrite_expr(RecExpr,ModInfo),RecName,FieldName};
rewrite_expr({'catch',Line,Expr}, ModInfo) ->
{'catch',Line,rewrite_expr(Expr,ModInfo)};
rewrite_expr({call,Line,
{remote,_,{atom,_,proper},{atom,_,forall}} = FunRef,
[RawType,Prop]}, ModInfo) ->
NewRawType = rewrite_type(RawType, ModInfo),
NewProp = rewrite_expr(Prop, ModInfo),
{call,Line,FunRef,[NewRawType,NewProp]};
rewrite_expr({call,Line,FunRef,Args}, ModInfo) ->
NewFunRef = rewrite_expr(FunRef, ModInfo),
NewArgs = [rewrite_expr(A,ModInfo) || A <- Args],
{call,Line,NewFunRef,NewArgs};
rewrite_expr({remote,Line,ModExpr,FunExpr}, ModInfo) ->
NewModExpr = rewrite_expr(ModExpr, ModInfo),
NewFunExpr = rewrite_expr(FunExpr, ModInfo),
{remote,Line,NewModExpr,NewFunExpr};
rewrite_expr({lc,Line,Expr,GensAndFilters}, ModInfo) ->
NewExpr = rewrite_expr(Expr, ModInfo),
NewGensAndFilters = [rewrite_expr(W,ModInfo) || W <- GensAndFilters],
{lc,Line,NewExpr,NewGensAndFilters};
rewrite_expr({bc,Line,Expr,GensAndFilters}, ModInfo) ->
NewExpr = rewrite_expr(Expr, ModInfo),
NewGensAndFilters = [rewrite_expr(W,ModInfo) || W <- GensAndFilters],
{bc,Line,NewExpr,NewGensAndFilters};
rewrite_expr({generate,Line,Pattern,Expr}, ModInfo) ->
NewPattern = rewrite_expr(Pattern, ModInfo),
NewExpr = rewrite_expr(Expr, ModInfo),
{generate,Line,NewPattern,NewExpr};
rewrite_expr({b_generate,Line,Pattern,Expr}, ModInfo) ->
NewPattern = rewrite_expr(Pattern, ModInfo),
NewExpr = rewrite_expr(Expr, ModInfo),
{b_generate,Line,NewPattern,NewExpr};
rewrite_expr({block,Line,Body}, ModInfo) ->
NewBody = [rewrite_expr(E,ModInfo) || E <- Body],
{block,Line,NewBody};
rewrite_expr({'if',Line,Clauses}, ModInfo) ->
NewClauses = [rewrite_clause(C,ModInfo) || C <- Clauses],
{'if',Line,NewClauses};
rewrite_expr({'case',Line,Expr,Clauses}, ModInfo) ->
NewExpr = rewrite_expr(Expr, ModInfo),
NewClauses = [rewrite_clause(C,ModInfo) || C <- Clauses],
{'case',Line,NewExpr,NewClauses};
rewrite_expr({'try',Line,Body1,Clauses1,Clauses2,Body2}, ModInfo) ->
NewBody1 = [rewrite_expr(E,ModInfo) || E <- Body1],
NewClauses1 = [rewrite_clause(C,ModInfo) || C <- Clauses1],
NewClauses2 = [rewrite_clause(C,ModInfo) || C <- Clauses2],
NewBody2 = [rewrite_expr(E,ModInfo) || E <- Body2],
{'try',Line,NewBody1,NewClauses1,NewClauses2,NewBody2};
rewrite_expr({'receive',Line,Clauses}, ModInfo) ->
NewClauses = [rewrite_clause(C,ModInfo) || C <- Clauses],
{'receive',Line,NewClauses};
rewrite_expr({'receive',Line,Clauses,AfterExpr,AfterBody}, ModInfo) ->
NewClauses = [rewrite_clause(C,ModInfo) || C <- Clauses],
NewAfterExpr = rewrite_expr(AfterExpr, ModInfo),
NewAfterBody = [rewrite_expr(E,ModInfo) || E <- AfterBody],
{'receive',Line,NewClauses,NewAfterExpr,NewAfterBody};
rewrite_expr({'fun',Line,{clauses,Clauses}}, ModInfo) ->
NewClauses = [rewrite_clause(C,ModInfo) || C <- Clauses],
{'fun',Line,{clauses,NewClauses}};
rewrite_expr({'query',Line,ListCompr}, ModInfo) ->
{'query',Line,rewrite_expr(ListCompr,ModInfo)};
rewrite_expr({record_field,Line,Expr,FieldName}, ModInfo) ->
{record_field,Line,rewrite_expr(Expr,ModInfo),FieldName};
rewrite_expr(Expr, _ModInfo) ->
Expr.
%%------------------------------------------------------------------------------
%% Type rewriting functions
%%------------------------------------------------------------------------------
-spec rewrite_type(abs_expr(), mod_info()) -> abs_expr().
rewrite_type({tuple,Line,FieldExprs}, ModInfo) ->
NewFieldExprs = [rewrite_type(F,ModInfo) || F <- FieldExprs],
{tuple,Line,NewFieldExprs};
rewrite_type({cons,Line,HeadExpr,TailExpr}, ModInfo) ->
NewHeadExpr = rewrite_type(HeadExpr, ModInfo),
NewTailExpr = rewrite_type(TailExpr, ModInfo),
{cons,Line,NewHeadExpr,NewTailExpr};
rewrite_type({op,Line,'++',LeftExpr,RightExpr}, ModInfo) ->
NewLeftExpr = rewrite_type(LeftExpr, ModInfo),
NewRightExpr = rewrite_type(RightExpr, ModInfo),
{op,Line,'++',NewLeftExpr,NewRightExpr};
rewrite_type({call,Line,{remote,_,{atom,_,Mod},{atom,_,Call}} = FunRef,
Args} = Expr,
#mod_info{name = ModName, helper_pid = HelperPid} = ModInfo) ->
case is_exported_type(Mod, Call, length(Args), HelperPid) of
true ->
native_type_call(ModName, Expr);
false ->
NewArgs = [rewrite_type(A,ModInfo) || A <- Args],
{call,Line,FunRef,NewArgs}
end;
rewrite_type({call,Line,{atom,_,Fun} = FunRef,Args} = Expr,
#mod_info{name = ModName, funs = Funs, imports = Imports,
no_autos = NoAutos} = ModInfo) ->
Arity = length(Args),
CallRef = {Fun,Arity},
case sets:is_element(CallRef,Funs) orelse sets:is_element(CallRef,Imports)
orelse erl_internal:bif(Fun,Arity)
andalso not sets:is_element(CallRef,NoAutos) of
true ->
NewArgs = [rewrite_type(A,ModInfo) || A <- Args],
{call,Line,FunRef,NewArgs};
false ->
native_type_call(ModName, Expr)
end;
rewrite_type(Expr, _ModInfo) ->
Expr.
-spec native_type_call(mod_name(), abs_expr()) -> abs_expr().
native_type_call(ModName, Expr) ->
AbsModName = {atom,0,ModName},
AbsTypeStr = {string,0,lists:flatten(erl_pp:expr(Expr))},
FunRef = {remote,0,{atom,0,proper_types},{atom,0,native_type}},
{call,0,FunRef,[AbsModName,AbsTypeStr]}.