50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
import {Function, getIn, getOut} from "../metacircular.js";
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import {Module} from "../structures/module.js";
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import { deepEqual } from "../util.js";
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import { Typed } from "../typed.js";
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import { fnType } from "../type_registry.js";
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// import {Num, NumDict, getType, getMul} from "../typeclasses/num.js";
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// const squareBoundToType = Symbol('squareBoundToType'); // the type of e.g., squareOfInt
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// // returning a function + its signature is the only way to make the outType of square depend on its input
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// const square = numDict => {
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// const typ = getType(numDict);
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// const mul = getMul(numDict);
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// return {
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// name: "squareOf:" + typ.toString(),
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// inType: typ,
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// outType: typ,
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// fn: x => mul(x)(x),
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// };
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// };
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// export const ModuleSquare = [
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// {i: squareBoundToType, t: Type},
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// {i: {name: "square", inType: NumDict, outType: squareBoundToType, fn: square}, t: Function},
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// ...makeTypedFnInOut({f: squareBoundToType, inType: Num, outType: Num}),
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// ];
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export const makeSquare = ({i: mul, t: mulFunction}) => {
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const numType = getIn(mulFunction);
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const boundMulFunction = getOut(mulFunction);
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if (!deepEqual(getOut(boundMulFunction), numType) || !deepEqual(getIn(boundMulFunction), numType)) {
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console.log(getOut(boundMulFunction), getIn(boundMulFunction), numType);
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throw new Error("invalid signature");
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}
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const square = x => mul(x)(x);
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const squareFunction = fnType({in: numType, out: numType});
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return {l:[
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{i: square , t: squareFunction},
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{i: squareFunction, t: Function},
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]};
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};
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const makeSquareType = fnType({in: Typed, out: Module});
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export const ModuleSquare = {l:[
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{i: makeSquare , t: makeSquareType},
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{i: makeSquareType, t: Function},
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]};
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