#175 · Programming Language Tools Developer Tool

Rust Viewer

View Rust source with line numbers, declaration navigation, search matches, and large-file-friendly plain-text output without sending code to an editor service.

Developer Input

Browser-based processing

Source code or data

use std::collections::HashMap;

#[derive(Debug)]
pub struct Cache {
    values: HashMap<String, String>,
}

impl Cache {
    pub fn get(&self, key: &str) -> Option<&String> {
        self.values.get(key)
    }
}

View mode

Search text

query

Show blank lines Case-sensitive search Whole-word search Auto-run while typing

How to use this developer tool

Paste Rust source code.
Choose numbered source, declaration index, or search mode.
Enter a search term when using search mode.
Build the view and copy or download the result.

What this developer tool does

The viewer builds a readable source representation, declaration index, or search report. It escapes output safely and avoids semantic code changes.

Read source → extract common declarations → number lines or locate search terms → generate a copy-ready view and statistics.

The template output area is plain text, so syntax coloring is intentionally limited. The source remains safe to copy and download.

Example

The page loads a working Rust Viewer 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 view Rust code with line numbers online?

Select Numbered source and run the viewer to generate a copy-ready line-numbered representation.

How do I find declarations in a Rust source file?

Choose Declaration index to list structs, enums, traits, impl blocks, and functions with line numbers.

Can I search a large Rust file in the browser?

Yes. Search matches mode reports matching lines, with case and whole-word options.

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
Views	Numbered, declarations, search
Navigation	Line-based declaration index
Large files	Plain-text efficient output

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