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for faster lookup/insert/delete
at the expense of about one word per object.
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* bjorn/floor-ceiling/OTP-13692:
Add math:floor/1 and math:ceil/1
Implement the new ceil/1 and floor/1 guard BIFs
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Add math:floor/1 and math:ceil/1 to avoid unnecessary conversions
in floating point expressions. That is, instead of having to write
float(floor(X)) as part of a floating point expressions, we can
write simply math:floor(X).
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The filters in a list comprehension can be guard expressions or
an ordinary expressions.
If a guard expression is used as a filter, an exception will basically
mean the same as 'false':
t() ->
L = [{some_tag,42},an_atom],
[X || X <- L, element(1, X) =:= some_tag]
%% Returns [{some_tag,42}]
On the other hand, if an ordinary expression is used as a filter, there
will be an exception:
my_element(N, T) -> element(N, T).
t() ->
L = [{some_tag,42},an_atom],
[X || X <- L, my_element(1, X) =:= some_tag]
%% Causes a 'badarg' exception when element(1, an_atom) is evaluated
It has been allowed for several releases to override a BIF with
a local function. Thus, if we define a function called element/2,
it will be called instead of the BIF element/2 within the module.
We must use the "erlang:" prefix to call the BIF.
Therefore, the following code is expected to work the same way as in
our second example above:
-compile({no_auto_import,[element/2]}).
element(N, T) ->
erlang:element(N, T).
t() ->
L = [{some_tag,42},an_atom],
[X || X <- L, element(1, X) =:= some_tag].
%% Causes a 'badarg' exception when element(1, an_atom) is evaluated
But the compiler refuses to compile the code with the following
diagnostic:
call to local/imported function element/2 is illegal in guard
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The compiler would crash in v3_codegen when trying to compile the
following code:
is_port(_) -> false.
foo(P) when port(P) -> ok.
We *could* have the compiler interpret the code as:
is_port(_) -> false.
foo(P) when erlang:is_port(P) -> ok.
But that would encourage using the obsolete form of the guard tests.
Note that the following code is illegal:
is_port(_) -> false.
foo(P) when is_port(P) -> ok.
It produces the following diagnostic:
call to local/imported function is_port/1 is illegal in guard
Therefore, we should refuse to compile the code.
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sys_pre_expand previously did a lot more work, for example,
translating records and funs, but now is merely a grab bag
of small transformations. Move those transformations to
v3_core.
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Make it clear that we test that the shell is not dependent on
the compiler application being in the path.
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* sverker/update_counter-deadlock/ERL-188/OTP-13731:
erts: Add test ets_SUITE:update_counter_table_growth
erts: Fix deadlock in ets:update_counter/4
erts: Optimize db_finalize_dbterm_hash
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See also ERL-182.
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* siri/cuddle-master:
Add short sleep when killing slave nodes
[ct test] Do reload_config instead of get_config
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slave_SUITE:t_start_link somtimes fails when checking that a slave is
dead. This commit add a short sleep before the check to allow the node
to terminate.
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It is possible that '...' is added later (OTP 20.0), but for now we
are not sure of all details.
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This reverts commit 7c133fb1094ad1cabbb5cfc157483a43c816c6a9.
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This reverts commit f1987d5299ce67b0eb4c4a83d8ee9bcf7426c307.
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* zandra/test_server/unmatched_returns/OTP-13345:
vts - Fix unmatched_return warnings
test_server_sup - Fix unmatched_return warnings
test_server_node - Fix unmatched_return warnings
test_server_io - Fix unmtached_return warnings
test_server_gl - Fix unmatched_return warnings
test_server_ctrl - Fix unmatched_return warnings
test_server - fix unmatched_return warnings
remove unused purify functions
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* josevalim/supervisor-get-callback-module/PR-1000/OTP-13619:
Return callback module in supervisor format_status
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The previous implementation of supervisor:get_callback_module/1
used sys:get_status/1 to get the supervisor inner state and
retrieve the callback module. Such implementation forbids any
other supervisor implementation that has an internal state
different than the #state{} record in supervisor.erl.
This patch allows supervisors to return the callback module
as part of the sys:get_status/1 data, no longer coupling the
callback module implementation with the inner #state{} record.
Notice we have kept the clause matching the previous
sys:get_status/1 reply for backwards compatibility purposes.
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Seems to be the growing meta tables that is causing increasing
failed memchecks after load factor was lowered.
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from 700% to 200%
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* siri/cuddle-master:
Change ct:sleep to timer:sleep where scaling is not wanted
Don't generate ssh key files in netconf client test
Ignore data received in break mode in test telnet_server
Wait for process to die before next call
Retry ct_telnet:get_data if no data is received after short wait
Don't throw rest of line when NOP is received in test telnet_server
Change ct:sleep to timer:sleep in telnet_server
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In particular, valgrind needs a lot of time for certain tests.
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gen_server_SUITE:start often fails since a call which is expected to
give 'noproc' error instead gives 'stopped' error. This happens when
the call is done before the process is really dead. To overcome this
problem, we now wait for the process exit before doing the call.
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* mururu/stdlib/fix-deprecated-warnings/PR-1050/OTP-13594:
Fix deprecated warnings
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* bjorn/stdlib/warning-and-error/OTP-13476:
Add documentation
epp: Add the -error and -warning directives
epp: Refactor expansion of header path
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In current deprecated warnings such as `crypto:rand_bytes/1 is deprecated
and will be removed in in a future release; use crypto:strong_rand_bytes/1`,
the word "in" is duplicated.
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* raimo/polish-gen_statem/OTP-13065:
Fix documentation
Clean up terminate functions
Fix callback mode after code change not used
Restructure loop_* to clarify S handling
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If one of several alternatives configurations are required for
an Erlang module to compile, but none are available, it would
be useful to give a nice error message. For example:
-ifdef(CONFIG_A).
%% Some code if A is true.
-else.
-ifdef(CONFIG_B).
%% Some code if B is true.
-else.
-error("Neither CONFIG_A nor CONFIG_B are available").
-endif.
-endif.
If neither CONFIG_A nor CONFIG_B are defined, the error message
will be:
module.erl:10: -error("Neither CONFIG_A nor CONFIG_B are available").
That is basically the same behavior as for the #error directive in
GCC.
For symmetry with the -error directive, add the -warning
directive to generate a compiler warning. For example:
-ifdef(HAVE_COOL_FEATURE).
%% Code if we have Cool Feature.
-else.
%% Inefficient fallback code.
-warning("Using inefficient fallback").
-endif.
If HAVE_COOL_FEATURE is not defined, the warning message will
be:
module.erl:8: Warning: -warning("Using inefficient fallback").
That is basically the same behavior as for the #warning directive
in GCC.
Conflicts:
lib/stdlib/src/epp.erl
lib/stdlib/test/epp_SUITE.erl
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* jlouis/stdlib/implement-lists-join/PR-1012/OTP-13523:
Implement lists:join/2
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* egil/maps-api-additions/PR-1025/OTP-13522:
stdlib: Document maps:update_with/3,4
stdlib: Add tests for maps:update_with/3,4
stdlib: Add maps:update_with/3,4
erts: Add tests for maps:take/2
stdlib: Document maps:take/2
erts: Add BIF maps:take/2
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* raimo/new-gen-state-machine/OTP-13065: (52 commits)
Add section on state filtering
Promote gen_statem over gen_fsm
Modify code_change/4 to return CallbackMode
Use ?NAME macro in examples
Introduce Fred Herbert suggested additions
Introduce corrections from Fred Hebert and Ingela
Use .png pictures instead of .gif
Write Design Principles chapter
Fix missing short forms for event timeout
Do more intricate Fred Hebert doc changes
Change Caller -> From as suggested by Fred Hebert
Do documentation improvements from Fred Hebert
Fix broken documenation reference
Rename state_timeout -> event_timeout
Fix most of the system docs and emacs mode
Change code_change/4 to {ok,State,Data}
Fixup sharpened test suite
Sharpen test suite
Remove the remove_event action and all alike
Relax caller() type check and cleanup
...
Conflicts:
lib/stdlib/src/gen.erl
lib/stdlib/src/gen_event.erl
lib/stdlib/src/gen_fsm.erl
lib/stdlib/src/gen_server.erl
lib/stdlib/test/error_logger_forwarder.erl
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The use case is not cryptographical but we want to compare Erlang
implementation to c implementation so use crypto:strong_rand_bytes anyway.
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