import { opt } from "https://deno.land/x/lambdapi@v1.0.1/src/deps.ts";
opt
applies parser p
and succeeds with default value x
if it fails
import { opt } from "https://deno.land/x/lambdapi@v1.0.1/src/deps.ts";
opt
applies parser p
and succeeds with default value x
if it fails