Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Re: Power Assert in Ruby
Search
k_tsj
November 08, 2015
Programming
2
4.8k
Re: Power Assert in Ruby
http://regional.rubykaigi.org/oedo05/
k_tsj
November 08, 2015
Tweet
Share
More Decks by k_tsj
See All by k_tsj
[RubyConf2019]Pattern matching - New feature in Ruby 2.7
k_tsj
0
2.6k
Pattern matching - New feature in Ruby 2.7
k_tsj
20
99k
Re: Pattern Matching in Ruby
k_tsj
1
2.1k
Power Assert in Ruby
k_tsj
16
9.2k
Pattern Matching in Ruby
k_tsj
18
6.3k
Other Decks in Programming
See All in Programming
障害対応を起点としたもっといい開発と運用のサイクル作りのためにできること / Hatena Enginner Seminar #29
polamjag
0
180
Anthropic Cookbook のおすすめレシピ
schroneko
7
980
2 週間で Twitter Bot を作ってみた
contour_gara
0
490
if constexpr文はテンプレート世界のラムダ式である
faithandbrave
3
650
TCAとKMPを用いた新規動画配信アプリ 「ABEMA Live」の設計
tomu28
1
110
Netty Chicago Java User Group 2024-04-17
sullis
0
180
Blue/Greenデプロイの導入による 運用フローの改善
kudoas
1
380
Polars入門
daikikatsuragawa
1
100
PHPはいつから死んでいるかの調査
chiroruxx
1
400
『Railsオワコン』と言われる時代に、なぜブルーモ証券はRailsを選ぶのか
free_world21
0
250
Site Reliability Engineering for GMO
pyama86
8
1k
Snowflakeで眠ったデータを起こそう!
estie
0
120
Featured
See All Featured
Why Our Code Smells
bkeepers
PRO
331
56k
Reflections from 52 weeks, 52 projects
jeffersonlam
345
19k
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
187
16k
How to name files
jennybc
65
93k
Creatively Recalculating Your Daily Design Routine
revolveconf
210
11k
Building a Scalable Design System with Sketch
lauravandoore
456
32k
Fireside Chat
paigeccino
21
2.6k
Practical Orchestrator
shlominoach
182
9.7k
The Straight Up "How To Draw Better" Workshop
denniskardys
227
130k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
241
1.2M
How to train your dragon (web standard)
notwaldorf
73
5.2k
Build your cross-platform service in a week with App Engine
jlugia
225
17k
Transcript
RE: POWER ASSERT IN RUBY Kazuki Tsujimoto
ࣗݾհ • “VM Bug Hunter” • ॳAsakusa.rb
• Ξαʔγϣϯϝιου/Ϛονϟͷ͍͚ʹ·ͣʹ ςετΛॻ͚ΔΑ͏ʹ͢ΔͨΊpower_assertΛ࡞ͬͨ • assert {expr}͚͍֮ͩ͑ͯΕΑ͍ • 1==3ͷΓ͕දࣔ͞Ε͍ͯͳ͍ͱ͍͏͕͋Δ $ ruby
test_example.rb assert { [0, 1, 2].find {|i| i.odd? } == 3 } | 1 POWER ASSERT IN RUBY
• ࣮ʹ͍ͬͯΔTracePointͷ੍ • ϝιουݺͼग़͠ͷ࠷దԽʹΑͬͯɺΠϕϯτ͕ىಈ ͞Εͳ͘ͳ͍ͬͯΔ • ࣄલʹpower_assertΛrequireͯ͠࠷దԽΛແޮԽ͢Ε Α͍͕ɺ͜Εखؒ $ ruby
-rpoewr_assert test_example.rb assert { [0, 1, 2].find {|i| i.odd? } == 3 } | | | false 1 POWER ASSERT IN RUBY
• akr͞Μ͔Β࠷దԽରͱͳΔϝιουΛʮ͜ ͱ͝ͱ͘࠶ఆٛͯ͠ݩʹͯ͠͠·ʯ͑Α ͍ͷͰͳ͍͔ͱͷࢦఠ • ࣄલrequireΛෆཁʹ͢Δ͜ͱͰ͖Δͷ͔ POWER ASSERT IN RUBY
• 1 == 3ͷ==ϝιουݺͼग़͠ͷΠϕϯτ͕र ͑ͳ͍ trace = TracePoint.new(:return, :c_return)
{|tp| p tp.method_id } trace.enable { 1 == 3 }
ݪҼ • Fixnum#==ͳͲͷجຊతͳϝιουಛघ έʔεѻ͍Ͱ؆ུԽͨ͠ॲཧΛ͍ͯ͠ΔͨΊ if (FIXNUM_2_P(recv, obj) && BASIC_OP_UNREDEFINED_P(BOP_EQ, FIXNUM_REDEFINED_OP_FLAG))
{ return (recv == obj) ? Qtrue : Qfalse; } else if(...) { ... } ... CALL_SIMPLE_METHOD(recv); ಛघέʔε(1) ಛघέʔε(..N) Ұൠέʔεɹ
ରࡦ • ૉͳΞϓϩʔν(࠶ఆٛͰϑϥάΛཱͯΔ) • Fixnum.method_addedΛϢʔβ͕ఆٛͯ͠ ͍Δ߹ͳͲʹӨڹ͕ग़Δ class Fixnum alias eq_orig
== def ==(other) eq_orig(other) end alias == eq_orig end
ରࡦ • ࠾༻ͨ͠Ξϓϩʔν(࠶ఆٛҎ֎ͰϑϥάΛཱͯΔ) • ՄࢹੑΛ໌ࣔతʹઃఆ͢Δ(Ruby 2.0ʙ2.2) • refine͢Δ(Ruby 2.0ʙ2.3dev) class
Fixnum public :== end module M refine Fixnum do def ==; end end end
ଓɾ • C.new == C.newͷ==ϝιουݺͼग़͠ͷΠ ϕϯτ͕र͑ͳ͍ trace = TracePoint.new(:return, :c_return)
{|tp| p tp.method_id } class C; end trace.enable { C.new == C.new }
ଓɾݪҼ • ϝιουͷ࣮ମ͕ಛఆͷCؔ(rb_obj_equal) ͩͬͨͱ͖ಛघέʔεѻ͍Ͱ؆ུԽͨ͠ॲ ཧΛ͍ͯ͠ΔͨΊ ... vm_search_method(ci, cc, recv); if
(check_cfunc(cc->me, rb_obj_equal)) { return recv == obj ? Qtrue : Qfalse; } ... CALL_SIMPLE_METHOD(recv);
ଓɾରࡦ • ૉͳΞϓϩʔν • ϝιουΛ࠶ఆٛͯ͠ݩʹ͞ͳ͍ • BasicObject.method_added(ུ) • ϞϯΩʔύον͕ద༻͞Εͨঢ়ଶͰϢʔβίʔυ͕࣮ߦ͞ Εͯ͠·͏
class BasicObject alias eq_orig == def ==(other); eq_orig(other); end alias == eq_orig end
ଓɾରࡦ • ࠾༻ͨ͠Ξϓϩʔν • refine͢Δ(refine͞Ε͍ͯΔ͜ͱΛࣔ͢ಛघͳϝιου ΤϯτϦΛrb_obj_equalͷલʹૠೖ͢Δ) • ͲͪΒͷΞϓϩʔνͰRubyͷඪ४Ϋϥεʹ͍ͭͯࣄલʹ ରԠ͓ͯ͘͜͠ͱ͕Մೳ͕ͩɺC֦ுͰ࡞ͨ͠Ϣʔβఆٛ Ϋϥε·Ͱٹ͑ͳ͍ͱ͍͏՝Δ
module M refine BasicObject do def ==; end end end
ଓʑɾ • C.new == C.newͷ==ϝιουݺͼग़͠ͷΠ ϕϯτ͕1ճ͔͠र͑ͳ͍ trace = TracePoint.new(:return, :c_return)
{|tp| p tp.method_id } class C; end trace.enable { loop { C.new == C.new } }
ଓʑɾݪҼ • 1ճͷݺͼग़࣌͠ʹʮ࠷ऴతʹrb_obj_equalΛݺͿʯ ͱ͍͏ใΛΠϯϥΠϯΩϟογϡʹ࣋ͬͯ͠·͏ͨΊ Lightweight Method Dispatch on MRI(Koichi Sasada)͔ΒҾ༻
ଓʑɾରࡦ • దٓΩϟογϡΛΫϦΞ͢ΕΑ͍ • power_assertͰassertʹ͞ΕͨϒϩοΫΛݺ ͼग़͢λΠϛϯάͰΫϦΞ • ΩϟογϡͷΫϦΞʹRefinementsΛར༻ • ۭϞδϡʔϧΛusing
·ͱΊ • power_assertͷࣄલrequire΄΅ෆཁʹ • શͰͳ͍͕௨ৗͷϢʔεέʔεΧόʔ • Rubyͷ෦࣮ʹڧ͘ґଘ͓ͯ͠Γࠓޙಈ࡞ ͢Δ͔ෆಁ໌ • Ҿ͖ଓ͖ࣄલrequireΛਪ