Showing 12 open source projects for "error"

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  • 1
    Swift Argument Parser

    Swift Argument Parser

    Straightforward, type-safe argument parsing for Swift

    ...It handles parsing, validation, automatic help generation, and dispatch to your run() or async entry point, letting you focus on command logic instead of boilerplate. The package supports subcommands, default values, custom parsing strategies, and rich error messages that match platform conventions. It integrates cleanly with Swift Package Manager, works well in CI, and provides incremental improvements such as Sendable conformances for wrappers to help in concurrent contexts. The issue tracker and releases show active maintenance, real-world usage patterns, and design notes for advanced scenarios like collecting unrecognized arguments or mixing parent options with subcommands. ...
    Downloads: 4 This Week
    Last Update:
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  • 2
    Logos

    Logos

    Create ridiculously fast Lexers

    Logos is a lexer generator for Rust, designed to create fast and efficient lexers with minimal code. It leverages Rust's procedural macros to define token patterns, streamlining the process of lexical analysis.​
    Downloads: 7 This Week
    Last Update:
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  • 3
    Rust-Peg

    Rust-Peg

    Parsing Expression Grammar (PEG) parser generator for Rust

    rust-peg is a Parsing Expression Grammar (PEG) parser generator for Rust. It allows developers to define grammars in a concise syntax and generates efficient parsers, facilitating the creation of domain-specific languages and interpreters.​
    Downloads: 6 This Week
    Last Update:
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  • 4
    body-parser

    body-parser

    Node.js body parsing middleware

    ...All middlewares will populate the req.body property with the parsed body when the Content-Type request header matches the type option, or an empty object ({}) if there was no body to parse, the Content-Type was not matched, or an error occurred.
    Downloads: 13 This Week
    Last Update:
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  • 5
    Parser for Rust source code

    Parser for Rust source code

    Parser for Rust source code

    ...The primary target is macro authors: you can parse TokenStreams into syn::File, syn::Item, syn::Expr, syn::Type, etc. It offers rich data structures, fine-grained parsing, span tracking (for error reporting), traversal and mutation APIs (visit, fold, visit_mut), printing back to tokens, and strong feature-gating so you only compile what you need. The documentation emphasises that while the crate is geared for procedural macros (and custom derives), some of the APIs may be of more general use. Using syn you can effectively write code that analyzes or generates Rust code at compile time.
    Downloads: 8 This Week
    Last Update:
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  • 6
    Ox: Attribute Grammar Compiling System

    Ox: Attribute Grammar Compiling System

    Ox is an attribute-grammar evaluator generator.

    ...From these augmented specifications, Ox generates ordinary Lex and Yacc specifications that build and decorate attributed parse trees. The user can specify parse-tree traversals for easy ordering of side effects such as code generation. Ox handles the tedious and error-prone details of writing code for parse-tree management, so its use eases problems of security and maintainability associated with that aspect of translator development.
    Downloads: 34 This Week
    Last Update:
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  • 7
    Argh

    Argh

    Rust derive-based argument parsing optimized for code size

    ...The API is intentionally compact so you can parse arguments inline near main() and map them straight into native types. It supports short and long options, boolean switches, and key–value flags while keeping error messages and help output understandable for end users. Subcommands can be modeled without much boilerplate, letting you structure larger CLIs while keeping each command self-contained. The overall feel is “get out of your way”: minimal setup, zero magic, and a straightforward path from argv to validated inputs.
    Downloads: 0 This Week
    Last Update:
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  • 8
    Instaparse

    Instaparse

    Instaparse aims to be the simplest way to build parsers in Clojure

    Instaparse is a simple yet powerful parser generator for Clojure and ClojureScript that turns grammars written in EBNF or ABNF into executable parsers, with support for left recursion, ambiguous grammars, PEG-like lookahead, and various output formats. Instaparse supports most of the common notations for context-free grammars. For example, a popular alternative to * is to surround the term with curly braces {}, and a popular alternative to ? is to surround the term with square brackets []....
    Downloads: 0 This Week
    Last Update:
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  • 9

    LR Parser and Lexer Generators: Fortran

    LR parser generator and lexer generator for use in Fortran

    The generator for LR parsers uses Pager's method, augmented with Tom Pennello's Forward Move Algorithm for error recovery. The grammar specifies identifiers for nodes in the abstract syntax tree, and the identifiers for tokens. It generates Fortran declarations for tree node identifiers and named constants that represent the PDA. The lexer generator accepts regular expressions and generates a DFA. It generates Fortran declarations for character classes, recognized objects, named constants that represent the DFA. ...
    Downloads: 0 This Week
    Last Update:
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  • 10
    rjsx-mode

    rjsx-mode

    A JSX major mode for Emacs

    rjsx-mode is an Emacs major mode derived from js2-mode, tailored for editing JSX files. It extends the parser to support full JSX syntax, providing features like syntax highlighting, indentation, and error checking for React development. ​
    Downloads: 4 This Week
    Last Update:
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  • 11
    PEG.js

    PEG.js

    PEG.js is a parser generator for JavaScript

    PEG.js is a simple parser generator for JavaScript that produces fast parsers with excellent error reporting. You can use it to process complex data or computer languages and build transformers, interpreters, compilers and other tools easily. PEG.js is still very much work in progress. There are no compatibility guarantees until version 1.0. Based on parsing expression grammar formalism, more powerful than traditional LL(k) and LR(k) parsers.
    Downloads: 0 This Week
    Last Update:
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  • 12
    Chevrotain

    Chevrotain

    Parser Building Toolkit for JavaScript

    Chevrotain is a powerful and fast parser-building toolkit for JavaScript. It supports the construction of LL(k) parsers and is suitable for building interpreters, compilers, and DSLs.​
    Downloads: 6 This Week
    Last Update:
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