YAML

1// Minimal YAML emitter for the OpenAPI document we build. Sufficient for the
2// shapes we produce (objects, arrays, strings, numbers, booleans, null) without
3// pulling in a dep. Strings are conservatively quoted whenever they contain any
4// character that would change YAML parsing.
5
6// YAML 1.2 reserves certain characters as indicators that cannot start a plain
7// scalar (they must be quoted): , [ ] { } # & * ! | > ' " % @ `
8// plus ? and : when followed by whitespace, plus - when followed by whitespace.
9// We're conservative: if any of those rules might trip, single-quote the string.
10const FIRST_CHAR_DENY = /^[,\[\]{}#&*!|>'"%@`]/;
11const