Merge branch 'staging' of https://github.com/QURIresearch/squiggle into QURIresearch-staging

This commit is contained in:
Umur Ozkul 2022-03-25 18:52:04 +01:00
commit 578e52c9b8
29 changed files with 870 additions and 19648 deletions

1
.gitignore vendored
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.merlin
.parcel-cache
.DS_Store
**/.sync.ffs_db

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module CT = Reducer.CodeTree
module CTV = Reducer.Extension.CodeTreeValue
module JsG = Reducer.Js.Gate
open Jest
open Expect
let expectEvalToBe = (expr: string, answer: string) =>
Reducer.eval(expr) -> CTV.showResult -> expect -> toBe(answer)
describe("builtin", () => {
// All MathJs operators and functions are available for string, number and boolean
// .e.g + - / * > >= < <= == /= not and or
// See https://mathjs.org/docs/expressions/syntax.html
// See https://mathjs.org/docs/reference/functions.html
test("-1", () => expectEvalToBe( "-1", "Ok(-1)"))
test("1-1", () => expectEvalToBe( "1-1", "Ok(0)"))
test("2>1", () => expectEvalToBe( "2>1", "Ok(true)"))
test("concat('a','b')", () => expectEvalToBe( "concat('a','b')", "Ok('ab')"))
})
describe("builtin exception", () => {
//It's a pity that MathJs does not return error position
test("MathJs Exception", () => expectEvalToBe( "testZadanga()", "Error(JS Exception: Error: Undefined function testZadanga)"))
})

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module CTV = Reducer.Extension.CodeTreeValue
open Jest
open Expect
describe("CodeTreeValue", () => {
test("showArgs", () =>
expect([CTV.CtvNumber(1.), CTV.CtvString("a")]->CTV.showArgs)
->toBe("1, 'a'")
)
test("showFunctionCall", () =>
expect( ("fn", [CTV.CtvNumber(1.), CTV.CtvString("a")])->CTV.showFunctionCall )
->toBe("fn(1, 'a')")
)
})

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module CTV = Reducer.Extension.CodeTreeValue
module ME = Reducer.MathJs.Eval
module Rerr = Reducer.Error
open Jest
open ExpectJs
describe("eval", () => {
test("Number", () => expect(ME.eval("1"))
-> toEqual(Ok(CTV.CtvNumber(1.))))
test("Number expr", () => expect(ME.eval("1-1"))
-> toEqual(Ok(CTV.CtvNumber(0.))))
test("String", () => expect(ME.eval("'hello'"))
-> toEqual(Ok(CTV.CtvString("hello"))))
test("String expr", () => expect(ME.eval("concat('hello ','world')"))
-> toEqual(Ok(CTV.CtvString("hello world"))))
test("Boolean", () => expect(ME.eval("true"))
-> toEqual(Ok(CTV.CtvBool(true))))
test("Boolean expr", () => expect(ME.eval("2>1"))
-> toEqual(Ok(CTV.CtvBool(true))))
})
describe("errors", () => {
// All those errors propagete up and are returned by the resolver
test("unknown function", () => expect(ME.eval("testZadanga()"))
-> toEqual(Error(Rerr.RerrJs(Some("Undefined function testZadanga"), Some("Error")))))
test("unknown answer type", () => expect(ME.eval("1+1i"))
-> toEqual(Error(Rerr.RerrTodo("Unhandled MathJs literal type: object"))))
})

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module MJ=Reducer.MathJs.Parse
module Result = Belt.Result
open Jest
open Expect
let expectParseToBe = (expr, answer) =>
MJ.parse(expr) -> Result.flatMap(MJ.castNodeType) -> MJ.showResult
-> expect -> toBe(answer)
describe("MathJs parse", () => {
describe("literals operators paranthesis", () => {
test("1", () => expectParseToBe("1", "1"))
test("'hello'", () => expectParseToBe("'hello'", "'hello'"))
test("true", () => expectParseToBe("true", "true"))
test("1+2", () => expectParseToBe("1+2", "add(1, 2)"))
test("add(1,2)", () => expectParseToBe("add(1,2)", "add(1, 2)"))
test("(1)", () => expectParseToBe("(1)", "(1)"))
test("(1+2)", () => expectParseToBe("(1+2)", "(add(1, 2))"))
})
describe( "variables", () => {
Skip.test("define", () => expectParseToBe("x = 1", "???"))
Skip.test("use", () => expectParseToBe("x", "???"))
})
describe( "functions", () => {
Skip.test("define", () => expectParseToBe("identity(x) = x", "???"))
Skip.test("use", () => expectParseToBe("identity(x)", "???"))
})
describe( "arrays", () => {
test("empty", () => expectParseToBe("[]", "[]"))
test("define", () => expectParseToBe("[0, 1, 2]", "[0, 1, 2]"))
test("define with strings", () =>
expectParseToBe("['hello', 'world']", "['hello', 'world']"))
Skip.test("range", () => expectParseToBe("range(0, 4)", "range(0, 4)"))
test("index", () => expectParseToBe("([0,1,2])[1]", "([0, 1, 2])[1]"))
})
describe( "records", () => {
test("define", () => expectParseToBe("{a: 1, b: 2}", "{a: 1, b: 2}"))
test("use", () => expectParseToBe("record.property", "record['property']"))
})
describe( "comments", () => {
Skip.test("define", () => expectParseToBe("# This is a comment", "???"))
})
describe( "if statement", () => {
Skip.test("define", () => expectParseToBe("if (true) { 1 } else { 0 }", "???"))
})
})

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module CT = Reducer.CodeTree
module CTV = Reducer.Extension.CodeTreeValue
open Jest
open Expect
let expectParseToBe = (expr: string, answer: string) =>
Reducer.parse(expr) -> CT.showResult -> expect -> toBe(answer)
let expectEvalToBe = (expr: string, answer: string) =>
Reducer.eval(expr) -> CTV.showResult -> expect -> toBe(answer)
// Current configuration does not ignore this file so we have to have a test
test("test helpers", () => expect(1)->toBe(1))

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open Jest
open Reducer_TestHelpers
describe("reducer using mathjs parse", () => {
// Test the MathJs parser compatibility
// Those tests show that there is a semantic mapping from MathJs to CodeTree
// Reducer.parse is called by Reducer.eval
// See https://mathjs.org/docs/expressions/syntax.html
// See https://mathjs.org/docs/reference/functions.html
// Those tests show that we are converting mathjs parse tree to what we need
describe("expressions", () => {
test("1", () => expectParseToBe("1", "Ok(1)"))
test("(1)", () => expectParseToBe( "(1)", "Ok(1)"))
test("1+2", () => expectParseToBe( "1+2", "Ok((:add 1 2))"))
test("(1+2)", () => expectParseToBe( "1+2", "Ok((:add 1 2))"))
test("add(1,2)", () => expectParseToBe( "1+2", "Ok((:add 1 2))"))
test("1+2*3", () => expectParseToBe( "1+2*3", "Ok((:add 1 (:multiply 2 3)))"))
})
describe("arrays", () => {
//Note. () is a empty list in Lisp
// The only builtin structure in Lisp is list. There are no arrays
// [1,2,3] becomes (1 2 3)
test("empty", () => expectParseToBe( "[]", "Ok(())"))
test("[1, 2, 3]", () => expectParseToBe( "[1, 2, 3]", "Ok((1 2 3))"))
test("['hello', 'world']", () =>
expectParseToBe( "['hello', 'world']", "Ok(('hello' 'world'))"))
test("index", () => expectParseToBe("([0,1,2])[1]", "Ok((:$atIndex (0 1 2) (1)))"))
})
describe("records", () => {
test("define", () => expectParseToBe("{a: 1, b: 2}", "Ok((:$constructRecord (('a' 1) ('b' 2))))"))
test("use", () =>
expectParseToBe("{a: 1, b: 2}.a", "Ok((:$atIndex (:$constructRecord (('a' 1) ('b' 2))) ('a')))"))
})
})
describe("eval", () => {
// All MathJs operators and functions are builtin for string, float and boolean
// .e.g + - / * > >= < <= == /= not and or
// See https://mathjs.org/docs/expressions/syntax.html
// See https://mathjs.org/docs/reference/functions.html
describe("expressions", () => {
test("1", () => expectEvalToBe( "1", "Ok(1)"))
test("1+2", () => expectEvalToBe( "1+2", "Ok(3)"))
test("(1+2)*3", () => expectEvalToBe( "(1+2)*3", "Ok(9)"))
test("2>1", () => expectEvalToBe( "2>1", "Ok(true)"))
test("concat('a ', 'b')", () => expectEvalToBe( "concat('a ', 'b')", "Ok('a b')"))
test("log(10)", () => expectEvalToBe( "log(10)", "Ok(2.302585092994046)"))
test("cos(10)", () => expectEvalToBe( "cos(10)", "Ok(-0.8390715290764524)"))
// TODO more built ins
})
describe("arrays", () => {
test("empty array", () => expectEvalToBe( "[]", "Ok([])"))
test("[1, 2, 3]", () => expectEvalToBe( "[1, 2, 3]", "Ok([1, 2, 3])"))
test("['hello', 'world']", () => expectEvalToBe( "['hello', 'world']", "Ok(['hello', 'world'])"))
test("index", () => expectEvalToBe("([0,1,2])[1]", "Ok(1)"))
test("index not found", ()
=> expectEvalToBe("([0,1,2])[10]", "Error(Array index not found: 10)"))
})
describe("records", () => {
test("define", () =>
expectEvalToBe("{a: 1, b: 2}", "Ok({a: 1, b: 2})"))
test("index", () =>
expectEvalToBe("{a: 1}.a", "Ok(1)"))
test("index not found", () =>
expectEvalToBe("{a: 1}.b", "Error(Record property not found: b)"))
})
})
describe("test exceptions", () => {
test("javascript exception", () =>
expectEvalToBe( "jsraise('div by 0')", "Error(JS Exception: Error: 'div by 0')"))
test("rescript exception", () =>
expectEvalToBe( "resraise()", "Error(TODO: unhandled rescript exception)"))
})

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"reason": {},
"sources": [
{
"dir": "src",
"dir": "src/rescript",
"subdirs": true
},
{

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"bundle": "webpack",
"start": "rescript build -w -with-deps",
"clean": "rescript clean",
"test:reducer": "jest --testPathPattern '.*__tests__/Reducer.*'",
"test": "jest",
"test:watch": "jest --watchAll",
"all": "yarn build && yarn bundle && yarn test"

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To interface your library there only 2 files to be modified:
- Reducer/Reducer_Extension/Reducer_Extension_CodeTreeValue.res
This is where your additional types are referred for the dispatcher.
- Reducer/Reducer_Extension/Reducer_ReducerLibrary.res
This is where dispatching to your library is done. If the dispatcher becomes beastly then feel free to divide it into submodules.
The Reducer is built to use different external libraries as well as different external parsers. Both external parsers and external libraries are plugins.
And finally try using Reducer.eval to how your extentions look:
```rescript
test("1+2", () => expectEvalToBe( "1+2", "Ok(3)"))
```

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module CodeTree = Reducer_CodeTree
module Dispatch = Reducer_Dispatch
module Error = Reducer_Error
module Extension = Reducer_Extension
module Js = Reducer_Js
module Etra = Reducer_Extra
module MathJs = Reducer_MathJs
let eval = CodeTree.eval
let parse = CodeTree.parse

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module BuiltIn = Reducer_Dispatch_BuiltIn
module T = Reducer_CodeTree_T
module CTV = Reducer_Extension.CodeTreeValue
module MJ = Reducer_MathJs_Parse
module MJT = Reducer_MathJs_ToCodeTree
module RLE = Reducer_Extra_List
module Rerr = Reducer_Error
module Result = Belt.Result
type codeTree = T.codeTree
type codeTreeValue = CTV.codeTreeValue
type reducerError = Rerr.reducerError
/*
Shows the Lisp Code as text lisp code
*/
let rec show = codeTree => switch codeTree {
| T.CtList(aList) => `(${(Belt.List.map(aList, aValue => show(aValue))
-> RLE.interperse(" ")
-> Belt.List.toArray -> Js.String.concatMany(""))})`
| CtValue(aValue) => CTV.show(aValue)
}
let showResult = (codeResult) => switch codeResult {
| Ok(a) => `Ok(${show(a)})`
| Error(m) => `Error(${Js.String.make(m)})`
}
/*
Converts a MathJs code to Lisp Code
*/
let parse_ = (expr: string, parser, converter): result<codeTree, reducerError> =>
expr -> parser -> Result.flatMap(node => converter(node))
let parse = (mathJsCode: string): result<codeTree, reducerError> =>
mathJsCode -> parse_( MJ.parse, MJT.fromNode )
module MapString = Belt.Map.String
type bindings = MapString.t<unit>
let defaultBindings: bindings = MapString.fromArray([])
// TODO Define bindings for function execution context
/*
After reducing each level of code tree, we have a value list to evaluate
*/
let reduceValueList = (valueList: list<codeTreeValue>): result<codeTreeValue, 'e> =>
switch valueList {
| list{CtvSymbol(fName), ...args} =>
(fName, args->Belt.List.toArray) -> BuiltIn.dispatch
| _ =>
valueList -> Belt.List.toArray -> CTV.CtvArray -> Ok
}
/*
Recursively evaluate/reduce the code tree
*/
let rec reduceCodeTree = (codeTree: codeTree, bindings): result<codeTreeValue, 'e> =>
switch codeTree {
| T.CtValue( value ) => value -> Ok
| T.CtList( list ) => {
let racc: result<list<codeTreeValue>, 'e> = list -> Belt.List.reduceReverse(
Ok(list{}),
(racc, each: codeTree) => racc->Result.flatMap( acc => {
each
-> reduceCodeTree(bindings)
-> Result.flatMap( newNode => {
acc->Belt.List.add(newNode)->Ok
})
})
)
racc -> Result.flatMap( acc => acc->reduceValueList )}
}
let evalWBindingsCodeTree = (aCodeTree, bindings): result<codeTreeValue, 'e> =>
reduceCodeTree(aCodeTree, bindings)
/*
Evaluates MathJs code via Lisp using bindings and answers the result
*/
let evalWBindings = (codeText:string, bindings: bindings) => {
parse(codeText) -> Result.flatMap(code => code -> evalWBindingsCodeTree(bindings))
}
/*
Evaluates MathJs code via Lisp and answers the result
*/
let eval = (code: string) => evalWBindings(code, defaultBindings)

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module CTV = Reducer_Extension.CodeTreeValue
type codeTreeValue = CTV.codeTreeValue
type rec codeTree =
| CtList(list<codeTree>) // A list to map-reduce
| CtValue(codeTreeValue) // Irreducible built-in value. Reducer should not know the internals. External libraries are responsible

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module Builtin = Reducer_Dispatch_BuiltIn

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module CTV = Reducer_Extension.CodeTreeValue
module Lib = Reducer_Extension.ReducerLibrary
module ME = Reducer_MathJs.Eval
module Rerr = Reducer_Error
/*
MathJs provides default implementations for builtins
This is where all the expected builtins like + = * / sin cos log ln etc are handled
DO NOT try to add external function mapping here!
*/
type codeTreeValue = CTV.codeTreeValue
type reducerError = Rerr.reducerError
exception TestRescriptException
let callInternal = (call: CTV.functionCall): result<'b, reducerError> =>{
let callMatjJs = (call: CTV.functionCall): result<'b, reducerError> =>
switch call {
| ("jsraise", [msg]) => Js.Exn.raiseError(CTV.show(msg)) // For Tests
| ("resraise", _) => raise(TestRescriptException) // For Tests
| call => call->CTV.showFunctionCall-> ME.eval
}
let constructRecord = arrayOfPairs => {
Belt.Array.map(arrayOfPairs, pairValue => {
switch pairValue {
| CTV.CtvArray([CTV.CtvString(key), valueValue]) =>
(key, valueValue)
| _ => ("wrong key type", pairValue->CTV.showWithType->CTV.CtvString)}
}) -> Js.Dict.fromArray -> CTV.CtvRecord -> Ok
}
let arrayAtIndex = (aValueArray: array<codeTreeValue>, fIndex: float) =>
switch Belt.Array.get(aValueArray, Belt.Int.fromFloat(fIndex)) {
| Some(value) => value -> Ok
| None => Rerr.RerrArrayIndexNotFound("Array index not found", Belt.Int.fromFloat(fIndex)) -> Error
}
let recordAtIndex = (dict: Js.Dict.t<codeTreeValue>, sIndex) =>
switch (Js.Dict.get(dict, sIndex)) {
| Some(value) => value -> Ok
| None => Rerr.RerrRecordPropertyNotFound("Record property not found", sIndex) -> Error
}
switch call {
// | ("$constructRecord", pairArray)
// | ("$atIndex", [CTV.CtvArray(anArray), CTV.CtvNumber(fIndex)]) => arrayAtIndex(anArray, fIndex)
// | ("$atIndex", [CTV.CtvRecord(aRecord), CTV.CtvString(sIndex)]) => recordAtIndex(aRecord, sIndex)
| ("$constructRecord", [CTV.CtvArray(arrayOfPairs)]) => constructRecord(arrayOfPairs)
| ("$atIndex", [CTV.CtvArray(aValueArray), CTV.CtvArray([CTV.CtvNumber(fIndex)])]) =>
arrayAtIndex(aValueArray, fIndex)
| ("$atIndex", [CTV.CtvRecord(dict), CTV.CtvArray([CTV.CtvString(sIndex)])]) => recordAtIndex(dict, sIndex)
| ("$atIndex", [obj, index]) => (CTV.showWithType(obj) ++ "??~~~~" ++ CTV.showWithType(index))->CTV.CtvString->Ok
| call => callMatjJs(call)
}
}
/*
Lisp engine uses Result monad while reducing expressions
*/
let dispatch = (call: CTV.functionCall): result<codeTreeValue, reducerError> =>
try {
let (fn, args) = call
// There is a bug that prevents string match in patterns
// So we have to recreate a copy of the string
Lib.dispatch((Js.String.make(fn), args), callInternal)
} catch {
| Js.Exn.Error(obj) =>
RerrJs(Js.Exn.message(obj), Js.Exn.name(obj))->Error
| _ => RerrTodo("unhandled rescript exception")->Error
}

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type reducerError =
| RerrFunctionExpected( string )
| RerrJs(option<string>, option<string>) // Javascript Exception
| RerrTodo(string) // To do
| RerrUnexecutedCode( string )
| RerrArrayIndexNotFound(string, int)
| RerrRecordPropertyNotFound(string, string)
let showError = (err) => switch err {
| RerrTodo( msg ) => `TODO: ${msg}`
| RerrJs( omsg, oname ) => {
let answer = "JS Exception:"
let answer = switch oname {
| Some(name) => `${answer} ${name}`
| _ => answer
}
let answer = switch omsg {
| Some(msg) => `${answer}: ${msg}`
| _ => answer
}
answer
}
| RerrArrayIndexNotFound(msg, index) => `${msg}: ${Js.String.make(index)}`
| RerrRecordPropertyNotFound(msg, index) => `${msg}: ${index}`
| RerrUnexecutedCode( codeString ) => `Unexecuted code remaining: ${codeString}`
| RerrFunctionExpected( msg ) => `Function expected: ${msg}`
}

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module CodeTreeValue = Reducer_Extension_CodeTreeValue
module ReducerLibrary = Reducer_Extension_ReducerLibrary

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/*
Irreducible values. Reducer does not know about those. Only used for external calls
This is a configuration to to make external calls of those types
*/
module AE = Reducer_Extra_Array
module Rerr = Reducer_Error
type rec codeTreeValue =
| CtvBool(bool)
| CtvNumber(float)
| CtvString(string)
| CtvSymbol(string)
| CtvArray(array<codeTreeValue>)
| CtvRecord(Js.Dict.t<codeTreeValue>)
type functionCall = (string, array<codeTreeValue>)
let rec show = aValue => switch aValue {
| CtvBool( aBool ) => Js.String.make( aBool )
| CtvNumber( aNumber ) => Js.String.make( aNumber )
| CtvString( aString ) => `'${aString}'`
| CtvSymbol( aString ) => `:${aString}`
| CtvArray( anArray ) => {
let args = anArray
-> Belt.Array.map(each => show(each))
-> AE.interperse(", ")
-> Js.String.concatMany("")
`[${args}]`}
| CtvRecord( aRecord ) => {
let pairs = aRecord
-> Js.Dict.entries
-> Belt.Array.map( ((eachKey, eachValue)) => `${eachKey}: ${show(eachValue)}` )
-> AE.interperse(", ")
-> Js.String.concatMany("")
`{${pairs}}`
}
}
let showWithType = aValue => switch aValue {
| CtvBool( _ ) => `Bool::${show(aValue)}`
| CtvNumber( _ ) => `Number::${show(aValue)}`
| CtvString( _ ) => `String::${show(aValue)}`
| CtvSymbol( _ ) => `Symbol::${show(aValue)}`
| CtvArray( _ ) => `Array::${show(aValue)}`
| CtvRecord( _ ) => `Record::${show(aValue)}`
}
let showArgs = (args: array<codeTreeValue>): string => {
args
-> Belt.Array.map(arg => arg->show)
-> AE.interperse(", ")
-> Js.String.concatMany("") }
let showFunctionCall = ((fn, args)): string => `${fn}(${ showArgs(args) })`
let showResult = (x) => switch x {
| Ok(a) => `Ok(${ show(a) })`
| Error(m) => `Error(${Rerr.showError(m)})`
}

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module CTV = Reducer_Extension_CodeTreeValue
type codeTreeValue = CTV.codeTreeValue
module Sample = { // In real life real libraries should be somewhere else
/*
For an example of mapping polymorphic custom functions. To be deleted after real integration
*/
let customAdd = (a:float, b:float):float => {a +. b}
}
/*
Map external calls of Reducer
*/
let dispatch = (call: CTV.functionCall, chain): result<codeTreeValue, 'e> => switch call {
| ("add", [CtvNumber(a), CtvNumber(b)]) => Sample.customAdd(a, b) -> CtvNumber -> Ok
| call => chain(call)
/*
If your dispatch is too big you can divide it into smaller dispatches and pass the call so that it gets called finally.
The final chain(call) invokes the builtin default functions of the interpreter.
Via chain(call), all MathJs operators and functions are available for string, number , boolean, array and record
.e.g + - / * > >= < <= == /= not and or sin cos log ln concat, etc.
// See https://mathjs.org/docs/expressions/syntax.html
// See https://mathjs.org/docs/reference/functions.html
Remember from the users point of view, there are no different modules:
// "doSth( constructorType1 )"
// "doSth( constructorType2 )"
doSth gets dispatched to the correct module because of the type signature. You get function and operator abstraction for free. You don't need to combine different implementations into one type. That would be duplicating the repsonsibility of the dispatcher.
*/
}

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module Array = Reducer_Extra_Array
module List = Reducer_Extra_List

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/*
Insert seperator between the elements of an array
*/
module LE = Reducer_Extra_List
let interperse = (anArray, seperator) =>
anArray -> Belt.List.fromArray -> LE.interperse(seperator) -> Belt.List.toArray

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/*
Insert seperator between the elements of a list
*/
let rec interperse = (aList, seperator) => switch aList {
| list{} => list{}
| list{a} => list{a}
| list{a, ...rest} => list{a, seperator, ...interperse(rest, seperator)}
}

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module Gate = Reducer_Js_Gate

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module CTV = Reducer_Extension.CodeTreeValue
module Rerr = Reducer_Error
type codeTreeValue = CTV.codeTreeValue
type reducerError = Rerr.reducerError
external castBool: unit => bool = "%identity"
external castNumber: unit => float = "%identity"
external castString: unit => string = "%identity"
/*
As JavaScript returns us any type, we need to type check and cast type propertype before using it
*/
let jsToCtv = (jsValue): result<codeTreeValue, reducerError> => {
switch Js.typeof(jsValue) {
| "boolean" => jsValue -> castBool -> CTV.CtvBool -> Ok
| "number" => jsValue -> castNumber -> CTV.CtvNumber -> Ok
| "string" => jsValue -> castString -> CTV.CtvString -> Ok
| other => Rerr.RerrTodo(`Unhandled MathJs literal type: ${Js.String.make(other)}`) -> Error
}
}

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module Eval = Reducer_MathJs_Eval
module Parse = Reducer_MathJs_Parse

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module CTV = Reducer_Extension.CodeTreeValue
module JsG = Reducer_Js_Gate
module Rerr = Reducer_Error
type codeTreeValue = CTV.codeTreeValue
type reducerError = Rerr.reducerError
@module("mathjs") external dummy_: string => unit = "evaluate"
let dummy1_ = dummy_ //Deceive the compiler to make the import although we wont make a call from rescript. Otherwise the optimizer deletes the import
type answer = {
"value": unit
}
/*
The result has to be delivered in an object so that we can type cast.
Rescript cannot type cast on basic values passed on their own.
This is why we call evalua inside Javascript and wrap the result in an Object
*/
let eval__ = %raw(`function (expr) { return {value: Mathjs.evaluate(expr)}; }`)
/*
Call MathJs evaluate and return as a variant
*/
let eval = (expr: string): result<codeTreeValue, reducerError> => {
try {
let answer = eval__(expr)
answer["value"]->JsG.jsToCtv
} catch {
| Js.Exn.Error(obj) =>
RerrJs(Js.Exn.message(obj), Js.Exn.name(obj))->Error
}
}

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/*
MathJs Nodes
We make MathJs Nodes strong-typed
*/
module AE = Reducer_Extra_Array
module JsG = Reducer_Js_Gate
module Rerr = Reducer_Error
type reducerError = Rerr.reducerError
type node = {
"type": string,
"isNode": bool,
"comment": string
}
type arrayNode = {
...node,
"items": array<node>
}
//assignmentNode
//blockNode
//conditionalNode
type constantNode = {
...node,
"value": unit
}
//functionAssignmentNode
type functionNode = {
...node,
"fn": string,
"args": array<node>
}
type indexNode = {
...node,
"dimensions": array<node>
}
type objectNode = {
...node,
"properties": Js.Dict.t<node>
}
type accessorNode = {
...node,
"object": node,
"index": indexNode
}
type operatorNode = {
...functionNode,
"op": string,
}
//parenthesisNode
type parenthesisNode = {
...node,
"content": node
}
//rangeNode
//relationalNode
type symbolNode = {
...node,
"name": string
}
external castAccessorNode: node => accessorNode = "%identity"
external castArrayNode: node => arrayNode = "%identity"
external castConstantNode: node => constantNode = "%identity"
external castFunctionNode: node => functionNode = "%identity"
external castIndexNode: node => indexNode = "%identity"
external castObjectNode: node => objectNode = "%identity"
external castOperatorNode: node => operatorNode = "%identity"
external castOperatorNodeToFunctionNode: operatorNode => functionNode = "%identity"
external castParenthesisNode: node => parenthesisNode = "%identity"
external castSymbolNode: node => symbolNode = "%identity"
/*
MathJs Parser
*/
@module("mathjs") external parse__: string => node = "parse"
let parse = (expr: string): result<node, reducerError> =>
try {
Ok(parse__(expr))
} catch {
| Js.Exn.Error(obj) =>
RerrJs(Js.Exn.message(obj), Js.Exn.name(obj))->Error
}
type mjNode =
| MjAccessorNode(accessorNode)
| MjArrayNode(arrayNode)
| MjConstantNode(constantNode)
| MjFunctionNode(functionNode)
| MjIndexNode(indexNode)
| MjObjectNode(objectNode)
| MjOperatorNode(operatorNode)
| MjParenthesisNode(parenthesisNode)
| MjSymbolNode(symbolNode)
let castNodeType = (node: node) => switch node["type"] {
| "AccessorNode" => node -> castAccessorNode -> MjAccessorNode -> Ok
| "ArrayNode" => node -> castArrayNode -> MjArrayNode -> Ok
| "ConstantNode" => node -> castConstantNode -> MjConstantNode -> Ok
| "FunctionNode" => node -> castFunctionNode -> MjFunctionNode -> Ok
| "IndexNode" => node -> castIndexNode -> MjIndexNode -> Ok
| "ObjectNode" => node -> castObjectNode -> MjObjectNode -> Ok
| "OperatorNode" => node -> castOperatorNode -> MjOperatorNode -> Ok
| "ParenthesisNode" => node -> castParenthesisNode -> MjParenthesisNode -> Ok
| "SymbolNode" => node -> castSymbolNode -> MjSymbolNode -> Ok
| _ => Rerr.RerrTodo(`Argg, unhandled MathJsNode: ${node["type"]}`)-> Error
}
let rec show = (mjNode: mjNode): string => {
let showValue = (a: 'a): string => if (Js.typeof(a) == "string") {
`'${Js.String.make(a)}'`
} else {
Js.String.make(a)
}
let showNodeArray = (nodeArray: array<node>): string =>
nodeArray
-> Belt.Array.map( a => showMathJsNode(a) )
-> AE.interperse(", ")
-> Js.String.concatMany("")
let showFunctionNode = (fnode: functionNode): string =>
`${fnode["fn"]}(${fnode["args"]->showNodeArray})`
let showObjectEntry = ( (key: string, value: node) ): string =>
`${key}: ${value->showMathJsNode}`
let showObjectNode = (oNode: objectNode): string =>
`{${ oNode["properties"]
->Js.Dict.entries
->Belt.Array.map(entry=>entry->showObjectEntry)
->AE.interperse(", ")->Js.String.concatMany("")
}}`
let showIndexNode = (iNode: indexNode): string =>
iNode["dimensions"]
-> Belt.Array.map( each => `${showResult(each->castNodeType)}`)
-> Js.String.concatMany("")
switch mjNode {
| MjAccessorNode(aNode) => `${aNode["object"]->showMathJsNode}[${aNode["index"]->showIndexNode}]`
| MjArrayNode(aNode) => `[${aNode["items"]->showNodeArray}]`
| MjConstantNode(cNode) => cNode["value"]->showValue
| MjFunctionNode(fNode) => fNode -> showFunctionNode
| MjIndexNode(iNode) => iNode -> showIndexNode
| MjObjectNode(oNode) => oNode -> showObjectNode
| MjOperatorNode(opNode) => opNode -> castOperatorNodeToFunctionNode -> showFunctionNode
| MjParenthesisNode(pNode) => `(${showMathJsNode(pNode["content"])})`
| MjSymbolNode(sNode) => sNode["name"]
}}
and let showResult = (rmjnode: result<mjNode, reducerError>): string =>
switch rmjnode {
| Error(e) => Rerr.showError(e)
| Ok(mjNode) => show(mjNode)
}
and let showMathJsNode = (node) => node -> castNodeType -> showResult

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module CTT = Reducer_CodeTree_T
module CTV = Reducer_Extension.CodeTreeValue
module JsG = Reducer_Js_Gate
module MJ = Reducer_MathJs_Parse
module Rerr = Reducer_Error
module Result = Belt.Result
type codeTree = CTT.codeTree
type codeTreeValue = CTV.codeTreeValue
type reducerError = Rerr.reducerError
let rec fromNode =
(mjnode: MJ.node): result<codeTree, reducerError> =>
MJ.castNodeType(mjnode) -> Result.flatMap(typedMjNode => {
let fromNodeList = (nodeList: list<MJ.node>): result<list<codeTree>, 'e> =>
Belt.List.reduceReverse(nodeList, Ok(list{}), (racc, currNode) =>
racc -> Result.flatMap(
acc => fromNode(currNode) -> Result.map(
currCode => list{currCode, ...acc})))
let caseFunctionNode = (fNode) => {
let fn = fNode["fn"] -> CTV.CtvSymbol -> CTT.CtValue
let lispArgs = fNode["args"] -> Belt.List.fromArray -> fromNodeList
lispArgs -> Result.map(
argsCode => list{fn, ...argsCode} -> CTT.CtList )
}
let caseObjectNode = oNode => {
let fromObjectEntries = ( entryList ) => {
let rargs = Belt.List.reduceReverse(
entryList,
Ok(list{}),
(racc, (key: string, value: MJ.node))
=>
racc
-> Result.flatMap( acc =>
fromNode(value) -> Result.map(valueCodeTree => {
let entryCode = list{key->CTV.CtvString->CTT.CtValue, valueCodeTree}
-> CTT.CtList
list{entryCode, ...acc}})))
let lispName = "$constructRecord" -> CTV.CtvSymbol -> CTT.CtValue
rargs -> Result.map(args => list{lispName, CTT.CtList(args)} -> CTT.CtList)
}
oNode["properties"]
-> Js.Dict.entries
-> Belt.List.fromArray
-> fromObjectEntries
}
let caseIndexNode = iNode => {
let rpropertyCodeList = Belt.List.reduceReverse(
iNode["dimensions"]->Belt.List.fromArray,
Ok(list{}),
(racc, currentPropertyMjNode)
=>
racc -> Result.flatMap( acc =>
fromNode(currentPropertyMjNode)
-> Result.map( propertyCode =>
list{ propertyCode, ...acc} )
)
)
rpropertyCodeList -> Result.map(
propertyCodeList => CTT.CtList(propertyCodeList))
}
let caseAccessorNode = ( objectNode, indexNode ) => {
let fn = "$atIndex" -> CTV.CtvSymbol -> CTT.CtValue
caseIndexNode( indexNode ) -> Result.flatMap(
indexCode => {
fromNode( objectNode ) -> Result.map(
objectCode => list{fn, objectCode, indexCode} -> CTT.CtList )
}
)
}
switch typedMjNode {
| MjArrayNode(aNode) =>
aNode["items"]
-> Belt.List.fromArray
-> fromNodeList
-> Result.map(list => CTT.CtList(list))
| MjConstantNode(cNode) =>
cNode["value"]-> JsG.jsToCtv -> Result.map( v => v->CTT.CtValue)
| MjFunctionNode(fNode) => fNode
-> caseFunctionNode
| MjOperatorNode(opNode) => opNode
-> MJ.castOperatorNodeToFunctionNode -> caseFunctionNode
| MjParenthesisNode(pNode) => pNode["content"] -> fromNode
| MjAccessorNode(aNode) => caseAccessorNode(aNode["object"], aNode["index"])
| MjObjectNode(oNode) => caseObjectNode(oNode)
| MjSymbolNode(sNode) =>
sNode["name"]-> CTV.CtvSymbol -> CTT.CtValue -> Ok
| MjIndexNode(iNode) => caseIndexNode(iNode)
}})

19647
yarn.lock

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