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-rw-r--r--lib/stdlib/src/string.erl14
1 files changed, 8 insertions, 6 deletions
diff --git a/lib/stdlib/src/string.erl b/lib/stdlib/src/string.erl
index 17135dd64a..6f7009b5d9 100644
--- a/lib/stdlib/src/string.erl
+++ b/lib/stdlib/src/string.erl
@@ -486,12 +486,14 @@ find(String, SearchPattern, trailing) ->
%% Fetch first codepoint and return rest in tail
-spec next_grapheme(String::unicode:chardata()) ->
- maybe_improper_list(grapheme_cluster(),unicode:chardata()).
+ maybe_improper_list(grapheme_cluster(),unicode:chardata()) |
+ {error,unicode:chardata()}.
next_grapheme(CD) -> unicode_util:gc(CD).
%% Fetch first grapheme cluster and return rest in tail
-spec next_codepoint(String::unicode:chardata()) ->
- maybe_improper_list(char(),unicode:chardata()).
+ maybe_improper_list(char(),unicode:chardata()) |
+ {error,unicode:chardata()}.
next_codepoint(CD) -> unicode_util:cp(CD).
%% Internals
@@ -508,7 +510,7 @@ equal_1(A0,B0) ->
case {unicode_util:cp(A0), unicode_util:cp(B0)} of
{[CP|A],[CP|B]} -> equal_1(A,B);
{[], []} -> true;
- _ -> false
+ {L1,L2} when is_list(L1), is_list(L2) -> false
end.
equal_nocase(A, A) -> true;
@@ -517,7 +519,7 @@ equal_nocase(A0, B0) ->
unicode_util:cp(unicode_util:casefold(B0))} of
{[CP|A],[CP|B]} -> equal_nocase(A,B);
{[], []} -> true;
- _ -> false
+ {L1,L2} when is_list(L1), is_list(L2) -> false
end.
equal_norm(A, A, _Norm) -> true;
@@ -526,7 +528,7 @@ equal_norm(A0, B0, Norm) ->
unicode_util:cp(unicode_util:Norm(B0))} of
{[CP|A],[CP|B]} -> equal_norm(A,B, Norm);
{[], []} -> true;
- _ -> false
+ {L1,L2} when is_list(L1), is_list(L2) -> false
end.
equal_norm_nocase(A, A, _Norm) -> true;
@@ -535,7 +537,7 @@ equal_norm_nocase(A0, B0, Norm) ->
unicode_util:cp(unicode_util:casefold(unicode_util:Norm(B0)))} of
{[CP|A],[CP|B]} -> equal_norm_nocase(A,B, Norm);
{[], []} -> true;
- _ -> false
+ {L1,L2} when is_list(L1), is_list(L2) -> false
end.
reverse_1(CD, Acc) ->