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getObjectType doesn't necessarily return an entry on the list. How should we proceed?

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Bjorn Stromberg 2020-06-06 17:29:04 +09:00
parent dc348a0e49
commit e5eb98e4aa
1 changed files with 64 additions and 58 deletions
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122
source/index.ts
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@ -4,58 +4,6 @@
export type Class<T = unknown> = new (...args: any[]) => T;
const objectTypeNames = [
'Function',
'Generator',
'AsyncGenerator',
'GeneratorFunction',
'AsyncGeneratorFunction',
'AsyncFunction',
'Observable',
'Array',
'Buffer',
'Object',
'RegExp',
'Date',
'Error',
'Map',
'Set',
'WeakMap',
'WeakSet',
'ArrayBuffer',
'SharedArrayBuffer',
'DataView',
'Promise',
'URL'
] as const;
type ObjectTypeName = typeof objectTypeNames[number];
const primitiveTypeNames = [
'null',
'undefined',
'string',
'number',
'bigint',
'boolean',
'symbol'
] as const;
export type Primitive =
| null
| undefined
| string
| number
| bigint
| boolean
| symbol;
type PrimitiveTypeName = typeof primitiveTypeNames[number];
function isPrimitiveTypeName(name: any): name is PrimitiveTypeName {
return primitiveTypeNames.includes(name);
}
const typedArrayTypeNames = [
'Int8Array',
'Uint8Array',
@ -89,21 +37,79 @@ function isTypedArrayName(name: any): name is TypedArrayTypeName {
return typedArrayTypeNames.includes(name);
}
export type TypeName = ObjectTypeName | PrimitiveTypeName | TypedArrayTypeName;
const objectTypeNames = [
'Function',
'Generator',
'AsyncGenerator',
'GeneratorFunction',
'AsyncGeneratorFunction',
'AsyncFunction',
'Observable',
'Array',
'Buffer',
'Object',
'RegExp',
'Date',
'Error',
'Map',
'Set',
'WeakMap',
'WeakSet',
'ArrayBuffer',
'SharedArrayBuffer',
'DataView',
'Promise',
'URL',
...typedArrayTypeNames
] as const;
type ObjectTypeName = typeof objectTypeNames[number];
function isObjectTypeName(name: any): name is ObjectTypeName {
return objectTypeNames.includes(name);
}
const primitiveTypeNames = [
'null',
'undefined',
'string',
'number',
'bigint',
'boolean',
'symbol'
] as const;
export type Primitive =
| null
| undefined
| string
| number
| bigint
| boolean
| symbol;
type PrimitiveTypeName = typeof primitiveTypeNames[number];
function isPrimitiveTypeName(name: any): name is PrimitiveTypeName {
return primitiveTypeNames.includes(name);
}
export type TypeName = ObjectTypeName | PrimitiveTypeName;
const {toString} = Object.prototype;
const isOfType = <T>(type: string) => (value: unknown): value is T => typeof value === type;
const getObjectType = (value: unknown): TypeName | undefined => {
const objectName = toString.call(value).slice(8, -1);
if (objectName) {
return objectName as TypeName;
const getObjectType = (value: unknown): ObjectTypeName | undefined => {
const objectTypeName = toString.call(value).slice(8, -1);
if (isObjectTypeName(objectTypeName)) {
return objectTypeName;
}
return undefined;
};
const isObjectOfType = <T>(type: TypeName) => (value: unknown): value is T => getObjectType(value) === type;
const isObjectOfType = <T>(type: ObjectTypeName) => (value: unknown): value is T => getObjectType(value) === type;
function is(value: unknown): TypeName {
switch (value) {