Vim script 静的解析の光と闇 - Speaker Deck

Vim script 静的解析の光と闇

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7JNTDSJQU੩తղੳͷ  ޫͱҋ

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"CPVUNF

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Kuniwak

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7JNTDSJQU੩తղੳͷ  ޫͱҋ

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ޫͱҋͱ͍ͬͨͳɻ  ͋Ε͸΢ιͩɻ

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VViimm ssccrriipptt静的解析の  闇

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ಛʹม਺ͷղੳͰ  ௧͍໨ʹ͖͋ͬͯͨ

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۩ମతʹ͸ɿ w ະఆٛม਺ͷ࢖༻Λݕग़ w ະ࢖༻ม਺Λݕग़

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࣮૷ͯ͠Έͨ͸͍͍΋ͷͷʜ w ଎߈ͰJTTVFཱ͕ͭͭ w ཱͪ͸͔ͩΔṖߏจͨͪ

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ʘ؁͑Δͳʗ

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No content

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ʢ؁͍͑ͨʜʣ

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-W

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ม਺ղੳͷجຊ͸ɺ  ม਺ͷએݴͱࢀরͷ௥੻

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એݴͱࢀরΛ௥੻͢Δ͜ͱͰʜ w એݴ͞Ε͍ͯͳ͍ͷʹࢀর͞Ε͍ͯΔ w એݴ͞ΕͯΔ͚Ͳࢀর͞Εͯͳ͍ Α͏ͳม਺Λݟ͚ͭͩ͢

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7JNTDSJQUͷม਺એݴ

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7JNTDSJQUͷม਺એݴ

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–:h redir lSFEJ\WBS^ϝοηʔδΛม਺ʹ  ϦμΠϨΫτ͠·͢ɻม਺͕ଘࡏ͠ͳ͍  ৔߹͸ɺ࡞੒͞Ε·͢ɻz

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ίΠπɺม਺એݴ  Ͱ͖Δͧʂ

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-W

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ม਺ղੳͷجຊ͸ɺ  είʔϓΛ͓͑͞Δ͜ͱ

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είʔϓͷछྨΛ  ΈͯΈΑ͏

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w NZ w PVS w MPDBM w TUBUF w ҉໧ͷHMPCBM 1FSM 7JNTDSJQU w H w M w T w X w C w U w W w ҉໧ͷH w ҉໧ͷM w ҉໧ͷW

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ѹ౗తͰ͸ͳ͍͔ʂ

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͔͠΋ʮ҉໧ͷʙʯ͕  དͷDPVOU໰୊Λ  Ҿ͖ى͜͢

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100 0 100

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WDPVOU͕  ࢀর͞ΕͯΔʂ

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͞Βʹม਺ͱؔ਺͸ʜ

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var func

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ผۭؒͩίϨʂ

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-W

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͋Δ഑ྻ͔Βผͷ  ഑ྻΛͭ͘Δؔ਺NBQ

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จࣈྻ 1FSMͷNBQؔ਺ 7JNTDSJQUͷNBQؔ਺

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จࣈྻʹ͞ΕΔͱ  ࣮ߦ࣌·ͰΘ͔Βͳ͍

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ͳͷͰɺଟ͘ͷ੩తݕࠪ πʔϧ͸ղੳΛఘΊΔ

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ͦ͜Ͱɺແࢹ͢ΔΑ͏ ʹ΍ͬͯΈͨͱ͜Ζʜ

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ޡܯࠂͷཛྷ

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ٽ͖ͳ͕ΒจࣈྻϦςϥϧ͚ͩ͸  ղੳͰ͖ΔΑ͏ʹͨ͠ʜ

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ʘŞŞŞʜNBQؔ਺͸ ུ ʗ

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ΩʔೖྗΛӈͷΩʔೖྗʹׂΓ౰ͯΔ NBQίϚϯυ

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ม਺એݴίϚϯυ͕࣮ߦ͞ΕΔ NBQίϚϯυͰม਺એݴ

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Զ͸͢Ͱʹจࣈྻͷ৔߹ʹ  ղੳ͢Δํ๏Λ஌͍ͬͯΔʜ  ಉ͡खॱͰղੳͯ͠΍Δͧʂ

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ʘʜʗ

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ʘŞŞŞʜʗ

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NBQίϚϯυͰม਺એݴ Ωʔೖྗͷ࠶ݱͳͷͰɺҟ෺΋ೖΔ

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No content

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řŕ

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ʘŞŞŞʜʗ

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ʘ୭͕࠶ؼల։͠ͳ͍ͱݴͬͨʁʗ

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͜ΕΒͷจࣈ͕NBQ͞Εͯͳ͍ͱ͸ݶΒͳ͍ʂ NBQ͸࠶ؼల։͞ΕΔ

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řřŕ

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ʘ؁͑Δͳʗ

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ʢ؁͍͑ͨʜʣ

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؁͍͑ͨͷͰɺղੳ͠΍͍͢  ίʔυΛॻ͍ͯ΄͍͠

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ղੳ͠΍͍͢ίʔυ OPSFNBQ͸࠶ؼల։͞Εͳ͍ จࣈྻΛಈతʹૢ࡞͠ͳ͍

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ͦΜͳ͜ΜͳͰͰ͖ͨͷ͕

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Πϯετʔϧํ๏

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$ pip install vim-vint

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$ vint .vimrc .vimrc:6:10: Variable is not declared (see :help E738)

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Ұॹʹಇ͖·ͤΜ͔ʁ