Crate annotate_snippets

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Expand description

A library for formatting of text or programming code snippets.

It’s primary purpose is to build an ASCII-graphical representation of the snippet with annotations.

Example

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 ()

The crate uses a three stage process with two conversions between states:

Snippet --> DisplayList --> String

The input type - Snippet is a structure designed to align with likely output from any parser whose code snippet is to be annotated.

The middle structure - DisplayList is a structure designed to store the snippet data converted into a vector of lines containing semantic information about each line. This structure is the easiest to manipulate and organize.

Finally, impl Display into a final String output.

A user of the crate may choose to provide their own equivalent of the input structure with an Into<DisplayList> trait.

A user of the crate may also choose to provide their own formatter logic, to convert a DisplayList into a String, or just a Stylesheet to use the crate’s formatting logic, but with a custom stylesheet.

Modules