--- title: Quick & Easy Parser Combinators | daily.dev description: A hands-on tutorial explaining how to build a parser combinator library from scratch using Scheme. Covers the theory behind combinators, implements core... canonical: https://daily.dev/posts/quick-easy-parser-combinators-eb8fomdn7 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Quick & Easy Parser Combinators | daily.dev og:description: A hands-on tutorial explaining how to build a parser combinator library from scratch using Scheme. Covers the theory behind combinators, implements core... og:url: https://daily.dev/posts/quick-easy-parser-combinators-eb8fomdn7 og:image: https://api.daily.dev/og/posts/EB8FOMdN7.png og:image:alt: Quick & Easy Parser Combinators og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Quick & Easy Parser Combinators **[Lobsters](https://daily.dev/sources/lobsters)** · 19 min read · 0 upvotes · 0 comments ## Summary A hands-on tutorial explaining how to build a parser combinator library from scratch using Scheme. Covers the theory behind combinators, implements core primitives (eof, char, seq, either, many), and extends them with helpers like one-plus, opt, and post-process. The tutorial walks through parsing arithmetic expressions with correct operator precedence, handling left-recursive grammar pitfalls, and — as a Scheme-specific bonus — converting the parse tree into valid Lisp forms that can be passed directly to eval. The resulting library, Parque, is available as an R7RS-compatible Scheme library. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [The quest for grammar combinators: introducing the Pup library](https://daily.dev/posts/the-quest-for-grammar-combinators-introducing-the-pup-library-cb4kxjd3v) · Planet Haskell · 0 upvotes · 0 comments - [Delimited continuations in lone lisp](https://daily.dev/posts/delimited-continuations-in-lone-lisp-gqhrt3dja) · Lobsters · 0 upvotes · 0 comments --- Tags: [#functional-programming](https://daily.dev/tags/functional-programming), [#compiler](https://daily.dev/tags/compiler) [View this post on daily.dev](https://daily.dev/posts/quick-easy-parser-combinators-eb8fomdn7) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Quick & Easy Parser Combinators","url":"https://daily.dev/posts/quick-easy-parser-combinators-eb8fomdn7","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/quick-easy-parser-combinators-eb8fomdn7"},"datePublished":"2026-07-28T13:06:10.114Z","dateModified":"2026-07-28T13:12:56.404Z","description":"A hands-on tutorial explaining how to build a parser combinator library from scratch using Scheme. 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