Mokhoa oa ho khetha pakeng tsa Hindley-Milner le bidirectional typing

\u003ch2\u003eU ka khetha joang lipakeng tsa Hindley-Milner le ho thaepa ka bobeli\u003c/h2\u003e \u003cp\u003eSengoliloeng sena se fana ka lintlha tsa bohlokoa le tlhaiso-leseling ka sehlooho sa eona, se thusang ho arolelana tsebo le kutloisiso.\u003c/p\u003e \u003ch3\u003eLitsela Tsa Bohlokoa\u003c/h3\u003e \u003cp\u003e Babali ba ka lebella ho fumana:\u003c/p\u003e \u003cul\u003e \u003cli\u003e Kutloisiso e tebileng ea taba\u003c/li\u003e \u003cli\u003e Lisebelisoa tse sebetsang le bohlokoa ba lefats'e la nnete\u003c/li\u003e \u003cli\u003e Maikutlo a litsebi le tlhahlobo\u003c/li\u003e \u003cli\u003e Litaba tse nchafalitsoeng mabapi le lintlafatso tsa hajoale\u003c/li\u003e \u003c/ul\u003e \u003ch3\u003eTlhahiso ea Boleng\u003c/h3\u003e \u003cp\u003eLikahare tsa boleng tse kang tsena li thusa ho haha ​​tsebo le ho khothaletsa ho etsa liqeto ka tsebo libakeng tse fapaneng.\u003c/p\u003e

Lipotso Tse Botsoang Hangata

Phapang e kholo ke efe lipakeng tsa Hindley-Milner le bidirectional type inference?

Hindley-Milner e fana ka mefuta ea lefats'e ka bophara ntle le ho hloka litlhaloso, e sebelisa kopano ho fumana mofuta o akaretsang bakeng sa polelo e ngoe le e ngoe. Ho thaepa ka mahlakore a mabeli ho arola mokhoa ona ka mekhoa e 'meli-ho hlahloba le ho kopanya-ho hloka litlhaloso empa ho tšehetsa likarolo tse ngata tse kang polymorphism ea boemo bo holimo le mefuta e itšetlehileng ka eona. Khetho e ipapisitse le hore na o etelletsa pele maikutlo a hlakileng ka botlalo kapa matla a hlahisoang ka litlhaloso tse fokolang.

Ke lokela ho sebelisa tlhahiso ea mofuta oa Hindley-Milner neng puong ea ka?

Hindley-Milner e nepahetse ha o batla tlhaloso e felletseng e sa hlokeng litlhaloso, joalo ka ha e bonoa lipuong tse kang Haskell 98 le OCaml. E sebetsa hantle bakeng sa polymorphism ea boemo ba 1 le mefuta e otlolohileng ea data ea algebra. Haeba moralo oa puo ea hau o etelletsa pele boiphihlelo bo khuts'oane, bo se nang litlhaloso ho feta likarolo tsa mofuta o tsoetseng pele, Hindley-Milner ke khetho e matla. Mewayz e akaretsa mekhoa e 'meli ho li-module tsa eona tse 207 ka $19/mo feela.

Mefokolo ea ho hlahloba mefuta e 'meli ke efe?

Ho hlahloba mefuta e 'meli ho hloka hore baetsi ba mananeo ba fane ka litlhaloso tsa mofuta maemong a itseng-hangata li-parameter le litlhaloso tsa boemo bo holimo. Le hoja sena se ka bonahala e le tšitiso, litlhaloso tsena li sebetsa e le litokomane le ho ntlafatsa melaetsa ea liphoso haholo. Khaello ea 'nete ke ho eketsa ho rarahana ha ts'ebetsong, kaha u tlameha ho hlalosa ka hloko moo sistimi e fetohang lipakeng tsa mekhoa ea ho hlahloba le ea ho kopanya ho boloka botsitso.

Na nka kopanya Hindley-Milner le bidirectional typing tsamaisong e le 'ngoe?

E, bahlahisi ba bangata ba sejwalejwale ba sebedisa mokgwa wa lebasetere. Ka mohlala, GHC Haskell, e sebelisa Hindley-Milner e le motheo empa e fetohela ho hlahloba mahlakore a mabeli bakeng sa mefuta ea maemo a holimo le lisebelisoa tse ling. Leano lena le nang le mekhahlelo le u fa mohopolo o hlakileng oa khoutu e bonolo ha u ntse u tšehetsa likarolo tse tsoetseng pele moo litlhaloso li fanoang. Mewayz's 207 modules, e fumanehang ka $19/mo, e tsamaea ka ho haha ​​litsamaiso tse joalo tse kopaneng mohato ka mohato.