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
5k
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
2.8k
Pattern matching - New feature in Ruby 2.7
k_tsj
20
110k
Re: Pattern Matching in Ruby
k_tsj
1
2.4k
Power Assert in Ruby
k_tsj
16
9.9k
Pattern Matching in Ruby
k_tsj
18
6.7k
Other Decks in Programming
See All in Programming
LLMとPlaywright/reg-suitを活用した jQueryリファクタリングの実際
kinocoboy2
4
660
Go Conference 2025: Goで体感するMultipath TCP ― Go 1.24 時代の MPTCP Listener を理解する
takehaya
7
1.5k
Back to the Future: Let me tell you about the ACP protocol
terhechte
0
120
プログラマのための作曲入門
cheebow
0
520
パフォーマンスチューニングで Web 技術を深掘り直す
progfay
18
4.8k
エンジニアとして高みを目指す、 利益を生み出す設計の考え方 / design-for-profit
minodriven
23
11k
開発生産性を上げるための生成AI活用術
starfish719
1
130
高度なUI/UXこそHotwireで作ろう Kaigi on Rails 2025
naofumi
4
3.1k
私はどうやって技術力を上げたのか
yusukebe
43
17k
育てるアーキテクチャ:戦い抜くPythonマイクロサービスの設計と進化戦略
fujidomoe
1
150
なぜあの開発者はDevRelに伴走し続けるのか / Why Does That Developer Keep Running Alongside DevRel?
nrslib
2
350
気づいて!アプリからのSOS 〜App Store Connect APIで始めるパフォーマンス健康診断〜
waka12
0
260
Featured
See All Featured
The Language of Interfaces
destraynor
162
25k
Site-Speed That Sticks
csswizardry
11
870
Build your cross-platform service in a week with App Engine
jlugia
231
18k
The Cult of Friendly URLs
andyhume
79
6.6k
Art, The Web, and Tiny UX
lynnandtonic
303
21k
Designing for humans not robots
tammielis
254
25k
The Invisible Side of Design
smashingmag
301
51k
Reflections from 52 weeks, 52 projects
jeffersonlam
352
21k
Code Review Best Practice
trishagee
72
19k
Fireside Chat
paigeccino
40
3.7k
Learning to Love Humans: Emotional Interface Design
aarron
274
40k
Rails Girls Zürich Keynote
gr2m
95
14k
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