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-rw-r--r--lib/stdlib/src/erl_scan.erl37
1 files changed, 21 insertions, 16 deletions
diff --git a/lib/stdlib/src/erl_scan.erl b/lib/stdlib/src/erl_scan.erl
index c179c3d067..18f64c46d0 100644
--- a/lib/stdlib/src/erl_scan.erl
+++ b/lib/stdlib/src/erl_scan.erl
@@ -55,18 +55,13 @@
token_info/1,token_info/2,
attributes_info/1,attributes_info/2,set_attribute/3]).
-%%% Local record.
--record(erl_scan,
- {resword_fun=fun reserved_word/1,
- ws=false,
- comment=false,
- text=false}).
+-export_type([error_info/0, line/0, tokens_result/0]).
%%%
-%%% Exported functions
+%%% Defines and type definitions
%%%
--define(COLUMN(C), is_integer(C), C >= 1).
+-define(COLUMN(C), (is_integer(C) andalso C >= 1)).
%% Line numbers less than zero have always been allowed:
-define(ALINE(L), is_integer(L)).
-define(STRING(S), is_list(S)).
@@ -95,6 +90,15 @@
-type error_description() :: term().
-type error_info() :: {location(), module(), error_description()}.
+%%% Local record.
+-record(erl_scan,
+ {resword_fun = fun reserved_word/1 :: resword_fun(),
+ ws = false :: boolean(),
+ comment = false :: boolean(),
+ text = false :: boolean()}).
+
+%%----------------------------------------------------------------------------
+
-spec format_error(Error :: term()) -> string().
format_error({string,Quote,Head}) ->
lists:flatten(["unterminated " ++ string_thing(Quote) ++
@@ -307,10 +311,10 @@ options(Opt) ->
options([Opt]).
opts(Options, [Key|Keys], L) ->
- V = case lists:keysearch(Key, 1, Options) of
- {value,{reserved_word_fun,F}} when ?RESWORDFUN(F) ->
+ V = case lists:keyfind(Key, 1, Options) of
+ {reserved_word_fun,F} when ?RESWORDFUN(F) ->
{ok,F};
- {value,{Key,_}} ->
+ {Key,_} ->
badarg;
false ->
{ok,default_option(Key)}
@@ -333,12 +337,13 @@ expand_opt(O, Os) ->
[O|Os].
attr_info(Attrs, Item) ->
- case catch lists:keysearch(Item, 1, Attrs) of
- {value,{Item,Value}} ->
- {Item,Value};
+ try lists:keyfind(Item, 1, Attrs) of
+ {_Item, _Value} = T ->
+ T;
false ->
- undefined;
- _ ->
+ undefined
+ catch
+ _:_ ->
erlang:error(badarg, [Attrs, Item])
end.