83 lines
2.5 KiB
TypeScript
83 lines
2.5 KiB
TypeScript
import { compile, func, string } from "./primordials.ts";
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import { String } from "./string.ts";
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export const Function = (() => {
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class Function {
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declare public readonly name: string;
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declare public readonly length: number;
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public toString(this: Function) {
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if (this.name !== "") return "function " + this.name + "(...) { ... }";
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else return "function (...) { ... }";
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}
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public valueOf() {
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return this;
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}
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public apply(this: (...args: any) => any, self: any, args: any[]) {
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return func.invoke(this, self, args);
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}
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public call(this: (...args: any) => any, self: any) {
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const args: any[] = [];
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for (let i = arguments.length - 1; i >= 1; i--) args[i - 1] = arguments[i];
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return func.invoke(this, self, args);
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}
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public bind(this: (...args: any) => any, self: any) {
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const cb = this;
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if (arguments.length === 0) return function (this: any) { return func.invoke(cb, this, arguments as any) };
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if (arguments.length <= 1) return function () { return func.invoke(cb, self, arguments as any); }
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const base: any[] = [];
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const offset = arguments.length - 1;
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base.length = offset;
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for (let i = 0; i < offset; i++) base[i] = arguments[i + 1];
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return function () {
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for (let i = 0; i < arguments.length; i++) {
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base[offset + i] = arguments[i];
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}
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return func.invoke(cb, self, base);
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};
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}
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public constructor (...args: string[]) {
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const parts = ["(function anonymous("];
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for (let i = 0; i < arguments.length - 1; i++) {
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if (i > 0) parts[parts.length] = ",";
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parts[parts.length] = arguments[i];
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}
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parts[parts.length] = "){\n";
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parts[parts.length] = String(arguments[arguments.length - 1]);
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parts[parts.length] = "\n})";
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var res = compile(string.stringBuild(parts))();
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return res;
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}
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public static compile(src = "", { globals = [], wrap = false }: { globals?: string[], wrap?: boolean } = {}) {
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const parts = [];
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if (wrap) parts[parts.length] = "return (function() {\n";
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if (globals.length > 0) {
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parts[parts.length] = "let {";
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for (let i = 0; i < globals.length; i++) {
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if (i > 0) parts[parts.length] = ",";
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parts[parts.length] = globals[i];
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}
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parts[parts.length] = "} = arguments[0];";
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}
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parts[parts.length] = src;
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if (wrap) parts[parts.length] = "\n})(arguments[0])";
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const res = compile(string.stringBuild(parts));
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return res;
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}
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}
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func.setCallable(Function, true);
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func.setConstructable(Function, true);
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return Function as any as typeof Function & ((value?: unknown) => (...args: any[]) => any);
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})();
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