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Parsing

A grammar describes the syntax of a programming language, and might be defined in Backus-Naur form (BNF). A lexer performs lexical analysis, turning text into tokens. A parser takes tokens and builds a data structure like an abstract syntax tree (AST). The parser is concerned with context: does the sequence of tokens fit the grammar? A compiler is a combined lexer and parser, built for a specific grammar.

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CyberChef

gchq /CyberChef

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An incremental parsing system for programming tools

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ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

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🕵️‍♂️ Collect a dossier on a person by username from thousands of sites

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Unified framework for building enterprise RAG pipelines with small, specialized models

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fabian-hiller /valibot

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ECMAScript parsing infrastructure for multipurpose analysis

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arktypeio /arktype

TypeScript's 1:1 validator, optimized from editor to runtime

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A library and language for building parsers, interpreters, compilers, etc.

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The ESTree Spec

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A Swift framework for parsing, formatting and validating international phone numbers. Inspired by Google's libphonenumber.

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The Elegant Parser

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lief-project /LIEF

LIEF - Library to Instrument Executable Formats (C++, Python, Rust)

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XML to JavaScript object converter.

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Write expressive, high-performance parsers with ease.

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Code smell detector for Ruby

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run-llama /llama_cloud_services

Knowledge Agents and Management in the Cloud

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UpdatedJul 18, 2025
Python

Followers: 11k followers
Website: github.com/topics/parsing
Wikipedia: Wikipedia

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