cats-parse graph query language experiment - hello world 1 / published by https://github.com/dacr/code-examples-manager #0d961a8d-0863-4c3f-92d5-793e6f86ff7a/57b00bd8f6d9d8667bebf43fe54091f3cdda8d7d

catsparse-hello-1.sc

// summary : cats-parse graph query language experiment - hello world 1
// keywords : scala, typelevel, cats-parse, hello-world, @testable
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : 0d961a8d-0863-4c3f-92d5-793e6f86ff7a
// created-on : 2025-03-13T14:02:18+01:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala "3.6.4"
//> using dep "org.typelevel::cats-parse:1.1.0"
//> using dep "com.lihaoyi::pprint:0.9.0"
// ---------------------

import cats.parse.Parser
import cats.parse.Rfc5234.lwsp

val helloParser = lwsp *> Parser.ignoreCase("hello") *> lwsp *> Parser.ignoreCase("world") *> lwsp

val results = List(
  "hello world",
  "Hello World",
  " Hello   World ",
  "HelloWorld"
).map(s => helloParser.parseAll(s))

pprint.pprintln(results)