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// data version | |
type DraftPost = { | |
kind: 'DraftPost'; | |
content: string; | |
}; | |
type ReviewingPost = { | |
kind: 'ReviewingPost'; | |
content: string; |
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export const fetch = (url, options = {}) => { | |
let { fetch = globalThis.fetch, ...restOptions } = options; | |
if (typeof fetch !== 'function') { | |
throw new Error(`Expected fetch to be a function, but received ${fetch}`); | |
} | |
let finalUrl = url; | |
let finalOptions = { |
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type State = { | |
count: number; | |
}; | |
type ActionVisitor = { | |
incre: (step: number) => State; | |
decre: (step: number) => State; | |
}; | |
type Action = { |
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// option type | |
interface OptionVisitor<A, B> { | |
None: () => B; | |
Some: (a: A) => B; | |
} | |
type OptionData<A> = | |
| { | |
kind: 'None'; | |
} |
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let identity = x => x | |
let createBF = (getChildren) => { | |
let handler = (stack = [], results = [], f) => { | |
if (stack.length === 0) return results; | |
let [head, ...tail] = stack; | |
let nextStack = tail.concat(getChildren(head)); | |
return handler(nextStack, [...results, f(head)], f); | |
}; | |
return (tree, f = identity) => handler([tree], [], f); | |
}; |
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const createTreeModule = (operations) => { | |
const append = (tree, node) => { | |
if (operations.matchChild(tree, node)) { | |
return operations.appendChild(tree, node); | |
} | |
return operations.map(tree, (child) => { | |
return append(child, node); | |
}); | |
}; |
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let run = (f, handlers) => { | |
try { | |
return f(); | |
} catch (effect) { | |
if (effect.type in handlers) { | |
handlers[effect.type](effect.payload, effect.continuation); | |
} else { | |
throw effect | |
} | |
} |
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const createOperation = name => (...args) => { | |
let operation = interpreter => | |
interpreter[name]( | |
...args.map(f => (f && f.operation ? f(interpreter) : f)) | |
); | |
operation.operation = true; | |
return operation; | |
}; | |
const createOperations = (...names) => |
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module Parser where | |
import Prelude (($), (<>), (==), (>=), (<=), (&&), (/=), (||), (>>>), negate) | |
import Data.Show (class Show, show) | |
import Data.Tuple (Tuple(..)) | |
import Data.Either (Either(..)) | |
import Data.Array ((:), intercalate) | |
import Data.Foldable (foldl, foldr) | |
import Data.Maybe (Maybe(..)) | |
import Data.String (codePointAt) |
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type result('a, 'b) = | |
| Ok('a) | |
| Error('b) | |
let inject = value => input => (Ok(value), input) | |
let error = e => input => (Error(e), input) | |
let item = input => { | |
let (index, source) = input |