#173 · Programming Language Tools Developer Tool

Rust Parser

Extract Rust modules, structs, enums, traits, implementations, functions, attributes, generics, and source locations into a searchable outline or JSON symbol table.

Developer Input

Browser-based processing

Source code or data

pub struct User {
    pub id: u64,
    name: String,
}

pub trait DisplayName {
    fn display_name(&self) -> &str;
}

impl DisplayName for User {
    fn display_name(&self) -> &str { &self.name }
}

Parser output

Maximum symbols

items

Include private symbols Include attributes Include line ranges Auto-run while typing

How to use this developer tool

Paste Rust source code.
Select outline, JSON, or implementation-map output.
Set a maximum symbol count for very large files.
Parse the code and inspect declaration names and source lines.

What this developer tool does

This structural parser scans Rust declarations without invoking rustc. It is designed for code navigation and documentation workflows rather than compiler-accurate AST generation.

Mask strings and comments → track brace depth → identify declarations → capture visibility and line numbers → build outline, implementation map, or JSON output.

Macro-generated declarations and highly complex syntax may not be represented completely. Use rustc tooling for compiler-grade AST analysis.

Example

The page loads a working Rust Parser example. Run the tool to compare the sample input with the generated output and status summary.

Tips for better output

Start with valid, isolated code or data.
Review heuristic and inferred results manually.
Use the official compiler, formatter, linter, or IDE before production use.

FAQ

How can I extract structs and functions from Rust code?

Paste the source and choose Readable outline or JSON symbol table to list declarations with line numbers.

Can I map Rust trait implementations online?

Yes. Implementation map mode extracts common impl Trait for Type and impl Type declarations.

Does this parser generate a real Rust AST?

No. It performs browser-based structural parsing and does not replace rustc parser APIs.

Can this browser tool replace the official compiler or IDE inspection?

No. It performs browser-based formatting, conversion, structural parsing, or heuristic analysis. Always verify production code with the official toolchain.

Does this tool upload my source code?

No processing is implemented by the page itself in your browser. Review your hosting and analytics configuration separately if you add external services.

Related developer tools

TypeScript Checker TypeScript Generator TypeScript Formatter TypeScript Converter

Tool coverage

Module	Coverage
Declarations	Structs, enums, traits, functions
Mappings	Impl targets and traits
Export	Readable text or JSON

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