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subscript

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Fast and tiny expression evaluator with minimal syntax.

github.com/dy/subscript

dy/subscript

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import { PREC_OR, PREC_AND, PREC_SHIFT, PREC_XOR, PREC_PREFIX, PREC_ASSIGN } from "../src/const.js" import { unary, binary } from "../src/parse.js" import { operator, compile } from "../src/compile.js" binary('>>', PREC_SHIFT), operator('>>', (a, b) => b && (a = compile(a), b = compile(b), ctx => a(ctx) >> b(ctx))) binary('<<', PREC_SHIFT), operator('<<', (a, b) => b && (a = compile(a), b = compile(b), ctx => a(ctx) << b(ctx))) binary('>>=', PREC_ASSIGN, true) operator('>>=', (a, b) => (b = compile(b), prop(a, (obj, path, ctx) => (obj[path] >>= b(ctx))))) binary('<<=', PREC_ASSIGN, true) operator('<<=', (a, b) => (b = compile(b), prop(a, (obj, path, ctx) => (obj[path] <<= b(ctx)))))