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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.
The Fast Lexical Analyzer - scanner generator for lexing in C and C++
A parser library for Go
Parser Building Toolkit for JavaScript
Interactive ASCII art diagram generators. 🌟
Verible is a suite of SystemVerilog developer tools, including a parser, style-linter, formatter and language server
DFA regular expression library & friends
Optimised tokenizer/lexer generator! 🐄 Uses /y for performance. Moo.
C++ Mathematical Expression Parsing And Evaluation Library https://www.partow.net/programming/exprtk/index.html
GraphQL Router / API Gateway framework written in Golang, focussing on correctness, extensibility, and high-performance. Supports Federation v1 & v2, Subscriptions & more.
Grammar files support & parser/PSI generation for IntelliJ IDEA
The fast scanner generator for Java™ with full Unicode support
A tiny compiler for a language featuring LL(2) with Lexer, Parser, ASM-like codegen and VM. Complex enough to give you a flavour of how the "real" thing works whilst not being a mere toy example
A high-performance C++ regex library and lexical analyzer generator with Unicode support. Extends Flex++ with Unicode support, indent/dedent anchors, lazy quantifiers, functions for lex and syntax error reporting and more. Seamlessly integrates with Bison and other parsers.
🌿 NodeJS PHP Parser - extract AST or tokens
