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-rw-r--r--lib/stdlib/doc/src/erl_parse.xml10
-rw-r--r--lib/stdlib/src/erl_parse.yrl64
-rw-r--r--lib/stdlib/test/erl_scan_SUITE.erl26
3 files changed, 65 insertions, 35 deletions
diff --git a/lib/stdlib/doc/src/erl_parse.xml b/lib/stdlib/doc/src/erl_parse.xml
index 2d5aff3c6c..cf0bff48cd 100644
--- a/lib/stdlib/doc/src/erl_parse.xml
+++ b/lib/stdlib/doc/src/erl_parse.xml
@@ -4,7 +4,7 @@
<erlref>
<header>
<copyright>
- <year>1996</year><year>2013</year>
+ <year>1996</year><year>2014</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
@@ -173,6 +173,7 @@
</func>
<func>
<name name="abstract" arity="2"/>
+ <type name="encoding_func"/>
<fsummary>Convert an Erlang term into an abstract form</fsummary>
<desc>
<p>Converts the Erlang data structure <c><anno>Data</anno></c> into an
@@ -183,7 +184,12 @@
selecting which integer lists will be considered
as strings. The default is to use the encoding returned by
<seealso marker="epp#default_encoding/0">
- <c>epp:default_encoding/0</c></seealso></p>
+ <c>epp:default_encoding/0</c></seealso>.
+ The value <c>none</c> means that no integer lists will be
+ considered as strings. The <c>encoding_func()</c> will be
+ called with one integer of a list at a time, and if it
+ returns <c>true</c> for every integer the list will be
+ considered a string.</p>
</desc>
</func>
</funcs>
diff --git a/lib/stdlib/src/erl_parse.yrl b/lib/stdlib/src/erl_parse.yrl
index 6316db7054..1dc5fc52a7 100644
--- a/lib/stdlib/src/erl_parse.yrl
+++ b/lib/stdlib/src/erl_parse.yrl
@@ -2,7 +2,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1996-2013. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2014. All Rights Reserved.
%%
%% 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
@@ -919,59 +919,63 @@ normalise_list([]) ->
Data :: term(),
AbsTerm :: abstract_expr().
abstract(T) ->
- abstract(T, 0, epp:default_encoding()).
+ abstract(T, 0, enc_func(epp:default_encoding())).
+
+-type encoding_func() :: fun((non_neg_integer()) -> boolean()).
%%% abstract/2 takes line and encoding options
-spec abstract(Data, Options) -> AbsTerm when
Data :: term(),
Options :: Line | [Option],
Option :: {line, Line} | {encoding, Encoding},
- Encoding :: latin1 | unicode | utf8,
+ Encoding :: 'latin1' | 'unicode' | 'utf8' | 'none' | encoding_func(),
Line :: erl_scan:line(),
AbsTerm :: abstract_expr().
abstract(T, Line) when is_integer(Line) ->
- abstract(T, Line, epp:default_encoding());
+ abstract(T, Line, enc_func(epp:default_encoding()));
abstract(T, Options) when is_list(Options) ->
Line = proplists:get_value(line, Options, 0),
Encoding = proplists:get_value(encoding, Options,epp:default_encoding()),
- abstract(T, Line, Encoding).
+ EncFunc = enc_func(Encoding),
+ abstract(T, Line, EncFunc).
-define(UNICODE(C),
- is_integer(C) andalso
- (C >= 0 andalso C < 16#D800 orelse
+ (C < 16#D800 orelse
C > 16#DFFF andalso C < 16#FFFE orelse
C > 16#FFFF andalso C =< 16#10FFFF)).
+enc_func(latin1) -> fun(C) -> C < 256 end;
+enc_func(unicode) -> fun(C) -> ?UNICODE(C) end;
+enc_func(utf8) -> fun(C) -> ?UNICODE(C) end;
+enc_func(none) -> none;
+enc_func(Fun) when is_function(Fun, 1) -> Fun;
+enc_func(Term) -> erlang:error({badarg, Term}).
+
abstract(T, L, _E) when is_integer(T) -> {integer,L,T};
abstract(T, L, _E) when is_float(T) -> {float,L,T};
abstract(T, L, _E) when is_atom(T) -> {atom,L,T};
abstract([], L, _E) -> {nil,L};
abstract(B, L, _E) when is_bitstring(B) ->
{bin, L, [abstract_byte(Byte, L) || Byte <- bitstring_to_list(B)]};
-abstract([C|T], L, unicode=E) when ?UNICODE(C) ->
- abstract_unicode_string(T, [C], L, E);
-abstract([C|T], L, utf8=E) when ?UNICODE(C) ->
- abstract_unicode_string(T, [C], L, E);
-abstract([C|T], L, latin1=E) when is_integer(C), 0 =< C, C < 256 ->
- abstract_string(T, [C], L, E);
-abstract([H|T], L, E) ->
+abstract([H|T], L, none=E) ->
{cons,L,abstract(H, L, E),abstract(T, L, E)};
+abstract(List, L, E) when is_list(List) ->
+ abstract_list(List, [], L, E);
abstract(Tuple, L, E) when is_tuple(Tuple) ->
- {tuple,L,abstract_list(tuple_to_list(Tuple), L, E)}.
-
-abstract_string([C|T], String, L, E) when is_integer(C), 0 =< C, C < 256 ->
- abstract_string(T, [C|String], L, E);
-abstract_string([], String, L, _E) ->
- {string, L, lists:reverse(String)};
-abstract_string(T, String, L, E) ->
- not_string(String, abstract(T, L, E), L, E).
-
-abstract_unicode_string([C|T], String, L, E) when ?UNICODE(C) ->
- abstract_unicode_string(T, [C|String], L, E);
-abstract_unicode_string([], String, L, _E) ->
+ {tuple,L,abstract_tuple_list(tuple_to_list(Tuple), L, E)}.
+
+abstract_list([H|T], String, L, E) ->
+ case is_integer(H) andalso H >= 0 andalso E(H) of
+ true ->
+ abstract_list(T, [H|String], L, E);
+ false ->
+ AbstrList = {cons,L,abstract(H, L, E),abstract(T, L, E)},
+ not_string(String, AbstrList, L, E)
+ end;
+abstract_list([], String, L, _E) ->
{string, L, lists:reverse(String)};
-abstract_unicode_string(T, String, L, E) ->
+abstract_list(T, String, L, E) ->
not_string(String, abstract(T, L, E), L, E).
not_string([C|T], Result, L, E) ->
@@ -979,9 +983,9 @@ not_string([C|T], Result, L, E) ->
not_string([], Result, _L, _E) ->
Result.
-abstract_list([H|T], L, E) ->
- [abstract(H, L, E)|abstract_list(T, L, E)];
-abstract_list([], _L, _E) ->
+abstract_tuple_list([H|T], L, E) ->
+ [abstract(H, L, E)|abstract_tuple_list(T, L, E)];
+abstract_tuple_list([], _L, _E) ->
[].
abstract_byte(Byte, L) when is_integer(Byte) ->
diff --git a/lib/stdlib/test/erl_scan_SUITE.erl b/lib/stdlib/test/erl_scan_SUITE.erl
index 447e159cd4..35067e8116 100644
--- a/lib/stdlib/test/erl_scan_SUITE.erl
+++ b/lib/stdlib/test/erl_scan_SUITE.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1998-2013. All Rights Reserved.
+%% Copyright Ericsson AB 1998-2014. All Rights Reserved.
%%
%% 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
@@ -21,7 +21,7 @@
init_per_group/2,end_per_group/2]).
-export([ error_1/1, error_2/1, iso88591/1, otp_7810/1, otp_10302/1,
- otp_10990/1, otp_10992/1]).
+ otp_10990/1, otp_10992/1, otp_11807/1]).
-import(lists, [nth/2,flatten/1]).
-import(io_lib, [print/1]).
@@ -60,7 +60,8 @@ end_per_testcase(_Case, Config) ->
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
- [{group, error}, iso88591, otp_7810, otp_10302, otp_10990, otp_10992].
+ [{group, error}, iso88591, otp_7810, otp_10302, otp_10990, otp_10992,
+ otp_11807].
groups() ->
[{error, [], [error_1, error_2]}].
@@ -1144,6 +1145,25 @@ otp_10992(Config) when is_list(Config) ->
erl_parse:abstract([$A,42.0], [{encoding,utf8}]),
ok.
+otp_11807(doc) ->
+ "OTP-11807. Generalize erl_parse:abstract/2.";
+otp_11807(suite) ->
+ [];
+otp_11807(Config) when is_list(Config) ->
+ {cons,0,{integer,0,97},{cons,0,{integer,0,98},{nil,0}}} =
+ erl_parse:abstract("ab", [{encoding,none}]),
+ {cons,0,{integer,0,-1},{nil,0}} =
+ erl_parse:abstract([-1], [{encoding,latin1}]),
+ ASCII = fun(I) -> I >= 0 andalso I < 128 end,
+ {string,0,"xyz"} = erl_parse:abstract("xyz", [{encoding,ASCII}]),
+ {cons,0,{integer,0,228},{nil,0}} =
+ erl_parse:abstract([228], [{encoding,ASCII}]),
+ {cons,0,{integer,0,97},{atom,0,a}} =
+ erl_parse:abstract("a"++a, [{encoding,latin1}]),
+ {'EXIT', {{badarg,bad},_}} = % minor backward incompatibility
+ (catch erl_parse:abstract("string", [{encoding,bad}])),
+ ok.
+
test_string(String, Expected) ->
{ok, Expected, _End} = erl_scan:string(String),
test(String).
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 17:39:52 +0000