number int32 - nberlette/is GitHub Wiki
function isInt32<N = number>(it: N): it is Int32<N>;Checks if a given value is a signed 32-bit integer.
| Name | Info |
|---|---|
it |
The value to check. |
true if it is a signed 32-bit integer, false otherwise.
Numbers
int32 number
import { type Int32, isInt32, type MaybeInt32 } from "jsr:@type/number/int32";
let value = 1 as Int32;
const setValue = (newValue: MaybeInt32) => {
if (isInt32(newValue)) value = newValue;
};
setValue(0x7FFFFFFF); // <- No error!
// This will raise a TypeScript compiler error:
value = -2147483649; // <- TS2322 Type '-2147483649' is not assignable to type 'Int32'.function isInt32(it: unknown): it is Int32;Checks if a given value is a signed 32-bit integer.
| Name | Info |
|---|---|
it |
The value to check. |
true if it is a signed 32-bit integer, false otherwise.
Numbers
int32 number
import { isInt32 } from "jsr:@type/number/int32";
console.log(isInt32(0x7FFFFFFF)); // <- true
console.log(isInt32(-2147483649)); // <- falseexport type Int32<N = number> = Cast<N, INT32>;Casts a value into a signed 32-bit integer type.
-
N(default:number)
Numbers Types
int32 number
import { type Int32, isInt32 } from "jsr:@type/number/int32";
let value = 1 as Int32;
const setValue = (newValue: Int32) => {
if (isInt32(newValue)) value = newValue;
};
setValue(0x7FFFFFFF); // <- No error!
// This will raise a TypeScript compiler error:
value = -2147483649; // <- TS2322 Type '-2147483649' is not assignable to type 'Int32'.export type MaybeInt32<N = number> = Cast<N, MAYBE_INT32>;Casts a value into a partial signed 32-bit integer type.
-
N(default:number)
Numbers Types
maybe int32 number
import { isInt32, type MaybeInt32 } from "jsr:@type/number/int32";
let value = 1 as MaybeInt32;
const setValue = (newValue: MaybeInt32) => {
if (isInt32(newValue)) value = newValue;
};
setValue(0x7FFFFFFF); // <- No error!
value = -2147483649; // <- No error! (this is the main difference from `Int32`)