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|
(.module:
[lux (#- Alias)
["." meta]
["@" target]
[abstract
[monad (#+ do)]]
[control
["." io]
["<>" parser ("#\." monad)
["<.>" code (#+ Parser)]]]
[data
["." product]
["." maybe]
["." text
["%" format (#+ format)]]
[collection
["." list ("#\." functor fold)]]]
[type
abstract]
[macro (#+ with_gensyms)
[syntax (#+ syntax:)]
["." code]
["." template]]])
(abstract: #export (Object brand) Any)
(template [<name>]
[(with_expansions [<brand> (template.identifier [<name> "'"])]
(abstract: #export <brand> Any)
(type: #export <name>
(..Object <brand>)))]
[Null]
[Function]
)
(template [<name> <type>]
[(type: #export <name>
<type>)]
[Boolean Bit]
[Integer Int]
[Float Frac]
[String Text]
)
(type: Nullable
[Bit Code])
(def: nullable
(Parser Nullable)
(let [token (' #?)]
(<| (<>.and (<>.parses? (<code>.this! token)))
(<>.after (<>.not (<code>.this! token)))
<code>.any)))
(type: Alias
Text)
(def: alias
(Parser Alias)
(<>.after (<code>.this! (' #as)) <code>.local_identifier))
(type: Field
[Bit Text (Maybe Alias) Nullable])
(def: static!
(Parser Any)
(<code>.this! (' #static)))
(def: field
(Parser Field)
(<code>.form ($_ <>.and
(<>.parses? ..static!)
<code>.local_identifier
(<>.maybe ..alias)
..nullable)))
(def: constant
(Parser Field)
(<code>.form ($_ <>.and
(<>\wrap true)
<code>.local_identifier
(<>.maybe ..alias)
..nullable)))
(type: Common_Method
{#name Text
#alias (Maybe Alias)
#inputs (List Nullable)
#io? Bit
#try? Bit
#output Nullable})
(type: Static_Method Common_Method)
(type: Virtual_Method Common_Method)
(type: Method
(#Static Static_Method)
(#Virtual Virtual_Method))
(def: common_method
(Parser Common_Method)
($_ <>.and
<code>.local_identifier
(<>.maybe ..alias)
(<code>.tuple (<>.some ..nullable))
(<>.parses? (<code>.this! (' #io)))
(<>.parses? (<code>.this! (' #try)))
..nullable))
(def: static_method
(<>.after ..static! ..common_method))
(def: method
(Parser Method)
(<code>.form (<>.or ..static_method
..common_method)))
(type: Member
(#Field Field)
(#Method Method))
(def: member
(Parser Member)
($_ <>.or
..field
..method
))
(def: input_variables
(-> (List Nullable) (List [Bit Code]))
(|>> list.enumeration
(list\map (function (_ [idx [nullable? type]])
[nullable? (|> idx %.nat code.local_identifier)]))))
(def: (nullable_type [nullable? type])
(-> Nullable Code)
(if nullable?
(` (.Maybe (~ type)))
type))
(def: (with_null g!temp [nullable? input])
(-> Code [Bit Code] Code)
(if nullable?
(` (case (~ input)
(#.Some (~ g!temp))
(~ g!temp)
#.Null
("php object null")))
input))
(def: (without_null g!temp [nullable? outputT] output)
(-> Code Nullable Code Code)
(if nullable?
(` (let [(~ g!temp) (~ output)]
(if ("php object null?" (~ g!temp))
#.None
(#.Some (~ g!temp)))))
(` (let [(~ g!temp) (~ output)]
(if (not ("php object null?" (~ g!temp)))
(~ g!temp)
(.error! "Null is an invalid value!"))))))
(type: Import
(#Class Text (Maybe Alias) (List Member))
(#Function Static_Method)
(#Constant Field))
(def: import
(Parser Import)
($_ <>.or
($_ <>.and
<code>.local_identifier
(<>.maybe ..alias)
(<>.some member))
(<code>.form ..common_method)
..constant
))
(syntax: #export (try expression)
{#.doc (doc (case (try (risky_computation input))
(#.Right success)
(do_something success)
(#.Left error)
(recover_from_failure error)))}
(wrap (list (` ("lux try" ((~! io.io) (~ expression)))))))
(def: (with_io with? without)
(-> Bit Code Code)
(if with?
(` (io.io (~ without)))
without))
(def: (io_type io? rawT)
(-> Bit Code Code)
(if io?
(` (io.IO (~ rawT)))
rawT))
(def: (with_try with? without_try)
(-> Bit Code Code)
(if with?
(` (..try (~ without_try)))
without_try))
(def: (try_type try? rawT)
(-> Bit Code Code)
(if try?
(` (.Either .Text (~ rawT)))
rawT))
(def: (make_function g!method g!temp source inputsT io? try? outputT)
(-> Code Code Code (List Nullable) Bit Bit Nullable Code)
(let [g!inputs (input_variables inputsT)]
(` (def: ((~ g!method)
[(~+ (list\map product.right g!inputs))])
(-> [(~+ (list\map nullable_type inputsT))]
(~ (|> (nullable_type outputT)
(try_type try?)
(io_type io?))))
(:assume
(~ (<| (with_io io?)
(with_try try?)
(without_null g!temp outputT)
(` ("php apply"
(:coerce ..Function (~ source))
(~+ (list\map (with_null g!temp) g!inputs)))))))))))
(syntax: #export (import: {import ..import})
(with_gensyms [g!temp]
(case import
(#Class [class alias members])
(with_gensyms [g!object]
(let [qualify (: (-> Text Code)
(|>> (format (maybe.default class alias) "::") code.local_identifier))
g!type (code.local_identifier (maybe.default class alias))
class_import (` ("php constant" (~ (code.text class))))]
(wrap (list& (` (type: (~ g!type)
(..Object (primitive (~ (code.text class))))))
(list\map (function (_ member)
(case member
(#Field [static? field alias fieldT])
(if static?
(` ((~! syntax:) ((~ (qualify (maybe.default field alias))))
(\ (~! meta.monad) (~' wrap)
(list (` (.:coerce (~ (nullable_type fieldT))
("php constant" (~ (code.text (format class "::" field))))))))))
(` (def: ((~ (qualify field))
(~ g!object))
(-> (~ g!type)
(~ (nullable_type fieldT)))
(:assume
(~ (without_null g!temp fieldT (` ("php object get" (~ (code.text field))
(:coerce (..Object .Any) (~ g!object))))))))))
(#Method method)
(case method
(#Static [method alias inputsT io? try? outputT])
(..make_function (qualify (maybe.default method alias))
g!temp
(` ("php object get" (~ (code.text method))
(:coerce (..Object .Any)
("php constant" (~ (code.text (format class "::" method)))))))
inputsT
io?
try?
outputT)
(#Virtual [method alias inputsT io? try? outputT])
(let [g!inputs (input_variables inputsT)]
(` (def: ((~ (qualify (maybe.default method alias)))
[(~+ (list\map product.right g!inputs))]
(~ g!object))
(-> [(~+ (list\map nullable_type inputsT))]
(~ g!type)
(~ (|> (nullable_type outputT)
(try_type try?)
(io_type io?))))
(:assume
(~ (<| (with_io io?)
(with_try try?)
(without_null g!temp outputT)
(` ("php object do"
(~ (code.text method))
(~ g!object)
(~+ (list\map (with_null g!temp) g!inputs)))))))))))))
members)))))
(#Function [name alias inputsT io? try? outputT])
(let [imported (` ("php constant" (~ (code.text name))))]
(wrap (list (..make_function (code.local_identifier (maybe.default name alias))
g!temp
imported
inputsT
io?
try?
outputT))))
(#Constant [_ name alias fieldT])
(let [imported (` ("php constant" (~ (code.text name))))]
(wrap (list (` ((~! syntax:) ((~ (code.local_identifier (maybe.default name alias))))
(\ (~! meta.monad) (~' wrap)
(list (` (.:coerce (~ (nullable_type fieldT)) (~ imported))))))))))
)))
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