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This makes:
```ruby
args = [1, 2, -> {}]; foo(*args, &args.pop)
```
call `foo` with 1, 2, and the lambda, in addition to passing the
lambda as a block. This is different from the previous behavior,
which passed the lambda as a block but not as a regular argument,
which goes against the expected left-to-right evaluation order.
This is how Ruby already compiled arguments if using leading
arguments, trailing arguments, or keywords in the same call.
This works by disabling the optimization that skipped duplicating
the array during the splat (splatarray instruction argument
switches from false to true). In the above example, the splat
call duplicates the array. I've tested and cases where a
local variable or symbol are used do not duplicate the array,
so I don't expect this to decrease the performance of most Ruby
programs. However, programs such as:
```ruby
foo(*args, &bar)
```
could see a decrease in performance, if `bar` is a method call
and not a local variable.
This is not a perfect solution, there are ways to get around
this:
```ruby
args = Struct.new(:a).new([:x, :y])
def args.to_a; a; end
def args.to_proc; a.pop; ->{}; end
foo(*args, &args)
# calls foo with 1 argument (:x)
# not 2 arguments (:x and :y)
```
A perfect solution would require completely disabling the
optimization.
Fixes [Bug #16504]
Fixes [Bug #16500]
Notes:
Merged: https://github.com/ruby/ruby/pull/3157
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* test/ruby/test_call.rb (test_safe_call): rhs should not be
evaluated when the receiver is nil. simplified the assertion
for [Bug #13964].
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60100 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* compile.c (iseq_compile_each0): fix stack consitency error on
attr-assign with safe navigation operator when the receiver is
nil, should pop it too. [ruby-core:83078] [Bug #13964]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60099 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* compile.c (setup_args): duplicate splatting array if more
arguments present to obey left-to-right execution order.
[ruby-core:77701] [Bug# 12860]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56469 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* symbol.h (is_attrset_id): ASET is an attrset ID. fix
unexpected safe call instead of an ordinary ASET.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53485 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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When you change this to true, you may need to add more tests.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53141 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* parse.y (block_command, block_call): fix `&.` calls after
block_call. [Feature #11537]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53138 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* defs/id.def (token_ops), parse.y (parser_yylex): change DOTQ
from ".?" to "&.". [ruby-core:71363] [Feature #11537]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52462 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* parse.y (lbracket): remove .? before aref. [Feature #11537]
revert r52422 and r52424
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52430 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* parse.y (lbracket): support .? before aref. [Feature #11537]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52422 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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[fix GH-1066]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52383 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* test_call.rb (test_safe_call): Add test cases for safe
navigation operator assignment. [Fix GH-1064]
Validate:
* can assign an attribute which is `nil`
* can "or assign" an attribute which is `nil`
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52238 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* compile.c (iseq_compile_each): support safe navigation of simple
attribute assignment. [Feature #11537]
* parse.y (mlhs_node, lhs, attrset_gen): ditto. keep mid
non-attrset as the sign of safe navigation.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52234 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* compile.c (iseq_peephole_optimize): peephole optimization for
branchnil jumps.
* compile.c (iseq_compile_each): generate save navigation operator
code.
* insns.def (branchnil): new opcode to pop the tos and branch if
it is nil.
* parse.y (NEW_QCALL, call_op, parser_yylex): parse token '.?'.
[Feature #11537]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52214 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* vm_insnhelper.c (vm_callee_setup_arg): disable fastpath if splat
argument, since argc may differ for each calls.
[ruby-core:61422] [Bug #9622]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45321 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19536 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5764 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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array as argument.
* test/ruby/test_*.rb: moved invariants to left side in
assert_equal, and use assert_nil, assert_raises and so on.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4516 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4512 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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* test/ruby/test_*.rb: split sample/test.rb into 28 test/unit testcases. some
tests could not be translates... search '!!' mark to see it.
* test/csv/test_csv.rb: should require 'csv', not '../lib/csv'. test runner
should set load path correctly.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4498 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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