commit	84523f86372aec17a750af2e2f0181fc4fcfeb25	[log] [tgz]
author	Matthew Maurer <mmaurer@google.com>	Tue Jun 27 01:09:17 2023 +0000
committer	Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>	Tue Jun 27 01:09:17 2023 +0000
tree	50d4d0aef8b14c307e51c929625ebd2aee69adf1
parent	4c49440bff652a0db5a86752e0fc5e9d94d43f89 [diff]
parent	2fbb93cba1eef92d537356feeb2a40404d6ea5b2 [diff]

tree: 50d4d0aef8b14c307e51c929625ebd2aee69adf1

README.md

annotate-snippets

annotate-snippets is a Rust library for annotation of programming code slices.

The library helps visualize meta information annotating source code slices. It takes a data structure called Snippet on the input and produces a String which may look like this:

error[E0308]: mismatched types
  --> src/format.rs:52:1
   |
51 |   ) -> Option<String> {
   |        -------------- expected `Option<String>` because of return type
52 | /     for ann in annotations {
53 | |         match (ann.range.0, ann.range.1) {
54 | |             (None, None) => continue,
55 | |             (Some(start), Some(end)) if start > end_index => continue,
...  |
71 | |         }
72 | |     }
   | |_____^ expected enum `std::option::Option`, found ()

Documentation

Usage

use annotate_snippets::{
    display_list::{DisplayList, FormatOptions},
    snippet::{Annotation, AnnotationType, Slice, Snippet, SourceAnnotation},
};

fn main() {
    let snippet = Snippet {
        title: Some(Annotation {
            label: Some("expected type, found `22`"),
            id: None,
            annotation_type: AnnotationType::Error,
        }),
        footer: vec![],
        slices: vec![Slice {
            source: r#"                annotations: vec![SourceAnnotation {
                label: "expected struct `annotate_snippets::snippet::Slice`, found reference"
                    ,
                range: <22, 25>,"#,
            line_start: 26,
            origin: Some("examples/footer.rs"),
            fold: true,
            annotations: vec![
                SourceAnnotation {
                    label: "",
                    annotation_type: AnnotationType::Error,
                    range: (187, 189),
                },
                SourceAnnotation {
                    label: "while parsing this struct",
                    annotation_type: AnnotationType::Info,
                    range: (34, 50),
                },
            ],
        }],
        opt: FormatOptions {
            color: true,
            ..Default::default()
        },
    };

    let dl = DisplayList::from(snippet);
    println!("{}", dl);
}

Local Development

cargo build
cargo test

When submitting a PR please use cargo fmt (nightly).