Crate miette_arborium 

Arborium-powered syntax highlighter for miette diagnostics.

This crate provides a MietteHighlighter that integrates arborium’s tree-sitter based syntax highlighting into miette’s error reporting output.

Quick Start

Install the highlighter globally and miette will automatically use it:

fn main() {
    // Install the highlighter (call once at startup)
    miette_arborium::install_global().ok();

    // Now all miette errors will have syntax highlighting
    // ... your code ...
}

Features

• Language detection: Automatically detects language from file extension or accepts an explicit language name
• Full arborium language support: Supports all languages enabled via Cargo features (passthrough to arborium)
• Minimal dependencies: Uses arborium’s tree-sitter-based highlighter
• ANSI terminal output: Renders highlighted code with terminal colors

Example

use miette::{Diagnostic, NamedSource, SourceSpan};
use thiserror::Error;

#[derive(Error, Debug, Diagnostic)]
#[error("syntax error")]
struct SyntaxError {
    #[source_code]
    src: NamedSource<String>,
    #[label("unexpected token here")]
    span: SourceSpan,
}

fn main() -> miette::Result<()> {
    miette_arborium::install_global().ok();

    let source = r#"fn main() {
    let x = 42
    println!("{}", x);
}"#;

    Err(SyntaxError {
        src: NamedSource::new("example.rs", source.to_string()),
        span: (32..33).into(),
    })?
}

Structs

MietteHighlighter

A syntax highlighter for miette that uses arborium for tree-sitter based highlighting.

Functions

install_global

Install the arborium highlighter as miette’s global highlighter.

install_global_with_theme

Install a custom themed highlighter as miette’s global highlighter.