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authorErlang/OTP <[email protected]>2010-06-03 13:45:29 +0200
committerErlang/OTP <[email protected]>2010-06-03 13:45:29 +0200
commit09f146a9dcfa4734f91c72bbb286ecca739fe439 (patch)
tree6a8d09d274a57fadde3539bdf103529521fc2e62 /lib/compiler/src/cerl_trees.erl
parenta1d19fe9606ec3500d3d44431c11003017f46594 (diff)
parentad8eef21ca9b8354fa4e32f799b6870dfbd35afb (diff)
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Merge branch 'pan/otp_8579_autoimport_override' into dev
* origin/pan/otp_8579_autoimport_override: Update preloaded modules Update primary bootstrap Remove outcommented code from erl_lint Make port_command/3 auto-imported Remove (harmless) warnings about min/max in core applications Autoimport min/2 and max/2 Improve coverage of erl_int in testcases Change warning to error for nowarn_bif_clash compiler directive Add -compile({no_auto_import,[F/A]}) doc to compiler.xml Add some testcases to compiler to verify that overriding really happens Return nowarn_bif_clash functionality but with warning Teach erl_lint to better override BIFs with local functions and imports Teach compiler to override autoimport with import First prototype for local functions overriding autoimported OTP-8579 Local functions should override auto-imported Local and imported functions now override the autoimported BIFs when the names clash. The pre R14 behaviour was that autoimported BIFs would override local functions. To avoid that old programs change behaviour, the following will generate an error: Doing a call without explicit module name to a local function having a name clashing with the name of an autoimported BIF that was present (and autoimported) before OTP R14A Explicitly importing a function having a name clashing with the name of an autoimported BIF that was present (and autoimported) before OTP R14A Using any form of the old compiler directive nowarn_bif_clash If the BIF was added or autoimported in OTP R14A or later, overriding it with an import or a local function will only result in a warning, To resolve clashes, you can either use the explicit module name erlang to call the BIF, or you can remove the autoimport of that specific BIF by using the new compiler directive -compile({no_auto_import,[F/A]})., which makes all calls to the local or imported function without explicit module name pass without warnings or errors. The change makes it possible to add autoimported BIFs without breaking or silently changing old code in the future. However some current code ingeniously utilizing the old behaviour or the nowarn_bif_clash compiler directive, might need changing to be accepted by the compiler.
Diffstat (limited to 'lib/compiler/src/cerl_trees.erl')
-rw-r--r--lib/compiler/src/cerl_trees.erl16
1 files changed, 7 insertions, 9 deletions
diff --git a/lib/compiler/src/cerl_trees.erl b/lib/compiler/src/cerl_trees.erl
index 7a2057713e..1e3755025f 100644
--- a/lib/compiler/src/cerl_trees.erl
+++ b/lib/compiler/src/cerl_trees.erl
@@ -1,19 +1,19 @@
%%
%% %CopyrightBegin%
-%%
-%% Copyright Ericsson AB 2001-2009. All Rights Reserved.
-%%
+%%
+%% Copyright Ericsson AB 2001-2010. 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
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
-%%
+%%
%% 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.
-%%
+%%
%% %CopyrightEnd%
%% @doc Basic functions on Core Erlang abstract syntax trees.
@@ -73,14 +73,12 @@ depth(T) ->
[] ->
0;
Gs ->
- 1 + lists:foldl(fun (G, A) -> max(depth_1(G), A) end, 0, Gs)
+ 1 + lists:foldl(fun (G, A) -> erlang:max(depth_1(G), A) end, 0, Gs)
end.
depth_1(Ts) ->
- lists:foldl(fun (T, A) -> max(depth(T), A) end, 0, Ts).
+ lists:foldl(fun (T, A) -> erlang:max(depth(T), A) end, 0, Ts).
-max(X, Y) when X > Y -> X;
-max(_, Y) -> Y.
%% @spec size(Tree::cerl()) -> integer()