import type { Not } from "./internal/index.mjs";
import type { IsFloat } from "./is-float.mjs";
import type { PositiveInfinity, NegativeInfinity } from "./numeric.mjs";
/**
Returns a boolean for whether the given number is a integer, like `-5`, `1.0` or `100`.

Like [`Number#IsInteger()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/IsInteger) but for types.

Use-case:
- If you want to make a conditional branch based on the result of whether a number is a intrger or not.

@example
```
type Integer = IsInteger<1>;
//=> true

type IntegerWithDecimal = IsInteger<1.0>;
//=> true

type NegativeInteger = IsInteger<-1>;
//=> true

type Float = IsInteger<1.5>;
//=> false

// Supports non-decimal numbers

type OctalInteger: IsInteger<0o10>;
//=> true

type BinaryInteger: IsInteger<0b10>;
//=> true

type HexadecimalInteger: IsInteger<0x10>;
//=> true
```

@group type-fest
*/
export type IsInteger<T> = T extends bigint ? true : T extends number ? number extends T ? false : T extends PositiveInfinity | NegativeInfinity ? false : Not<IsFloat<T>> : false;