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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_EQ, PREC_COMP } from '../src/const.js' import { unary, binary } from "../src/parse.js" import { operator, compile } from "../src/compile.js" binary('==', PREC_EQ), operator('==', (a, b) => b && (a = compile(a), b = compile(b), ctx => a(ctx) == b(ctx))) binary('!=', PREC_EQ), operator('!=', (a, b) => b && (a = compile(a), b = compile(b), ctx => a(ctx) != b(ctx))) binary('>', PREC_COMP), operator('>', (a, b) => b && (a = compile(a), b = compile(b), ctx => a(ctx) > b(ctx))) binary('<', PREC_COMP), operator('<', (a, b) => b && (a = compile(a), b = compile(b), ctx => a(ctx) < b(ctx))) binary('>=', PREC_COMP), operator('>=', (a, b) => b && (a = compile(a), b = compile(b), ctx => a(ctx) >= b(ctx))) binary('<=', PREC_COMP), operator('<=', (a, b) => b && (a = compile(a), b = compile(b), ctx => a(ctx) <= b(ctx)))