Objects/_api Paths breaks with Array<T> or T[] in property types

[zavierboyd]

🐞 Bug Report

Describe the bug

When using Object/_api Paths with an object that contains an Array the output type will union with List<string | number | symbol>

Reproduce the bug

import { } from 'ts-toolbelt'
import { Paths } from 'Object/_api'

// Using Array<T> notation
interface simpleObj1 { 'prop': Array<number>}
type out1 = Paths<simpleObj1>
// type out1 = List<string | number | symbol> | ["prop"?, number?]

// Using T[] notation
interface simpleObj2 { 'prop': number[]}
type out2 = Paths<simpleObj2>
// type out2 = List<string | number | symbol> | ["prop"?, number?]

// Inferring types using typeof
const value = { 'props': [1, 2, 3, 4, 5] }
type simpleObj3 = typeof value
// type simpleObj3 = {
//     props: number[];
// }
type out3 = PathsO<simpleObj3>
// type out3 = List<string | number | symbol> | ["props"?, number?]

Expected behavior

Expected the output type to be ['prop': number?] when using default Arrays without List<string | number | symbol>

// Expectation when inferring with typeof V or using T[] or Array<T> notation
interface simpleObj2 { 'prop': number[]}
type out2 = Paths<simpleObj2>
// type out2 = ["prop"?, number?]

Temporary Solution

// Using an interface array
interface numberArray {
    [key: number]: number
}
interface simpleObj4 { 'prop': numberArray}
type out4 = Paths<simpleObj3>
// type out4 = ['prop'?, number?]

Additional context

Versions:
"ts-toolbelt": "8.0.7"
"typescript": "4.1.3"

Tools:

• Visual Studio Code: 1.52.1

[millsp]

Hey @zavierboyd, thanks for reporting this. I will look into it ASAP