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Functions that can are known be pure can be evaluated at
compile-time if the arguments are literals and if the result is
expressible as a literal.
list_to_ref/1 and list_to_port/1 returns terms that cannot be
expressed as literals, so the optimization is not possible.
The argument for port_to_list/1 is never a literal, so there is
no way to evaluate it at compile-time. Therefore, marking those
functions as pure serves no useful purpose.
Note: list_to_pid/1 *is* marked as pure, but only so that we can test
the code in sys_core_fold that rejects pure functions that evaluate to
at term that is not possible to express as a literal. It is sufficient
to have one pure function of that kind.
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erlang:hash/2 was removed in c5d9b970fb5b3a71.
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Follow the same pattern as pid_to_list
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There is no need to list every obscure safe BIF in erl_bifs:is_safe/3.
The purpose of erl_bifs:is_safe/3 is merely to warn when the
return value of one of the safe BIFs is ignored.
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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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Implement as ceil/1 and floor/1 as new guard BIFs (essentially part of
Erlang language). They are guard BIFs because trunc/1 is a guard
BIF. It would be strange to have trunc/1 as a part of the language, but
not ceil/1 and floor/1.
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Added: binary_to_integer/1,2, integer_to_binary/1,2
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Mark math:pi/0 as pure, informing the compiler that the value
can be calculated at compile time.
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concat_binary/1 was deprecated in R13B04, but already in
the R10B-2 release, the documentation recommends using
list_to_binary/1 instead.
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* pan/otp_8217_binary:
Add documentation for binary module
Add more tests and make some go easier on small systems
Correct Boyer More and trapping for longest_common_suffix
Add longer timetrap to testcases and add binary to app file
Add guard BIFs binary_part/2,3
Add binary:{encode,decode}_unsigned({1,2}
Add referenced_byte_size/1
Add binary:list_to_bin/1 and binary:copy/1,2
Add bin_to_list/{1,2,3}
Add binary:longest_common_prefix/longest_common_suffix
Add binary:part to erl_bif_binary.c
Move binary module bif's to erl_bif_binary.c
Count reductions for process even when not trapping
Add random compare testcase
Teach BIF's binary:match/matches interrupting/restarting
Teach binary.c the semantics to take longest instead of shortest match
Initial commit of the binary EEP
OTP-8217 Implement EEP31
The module binary from EEP31 (and EEP9) is implemented.
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Add the gc_bif's to the VM.
Add infrastructure for gc_bif's (guard bifs that can gc) with two and.
three arguments in VM (loader and VM).
Add compiler support for gc_bif with three arguments.
Add compiler (and interpreter) support for new guard BIFs.
Add testcases for new guard BIFs in compiler and emulator.
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