rainier-view

The V in MVC: a [View] value a controller returns, a [ViewEngine] port, and [BladeEngine] — a Blade-style template engine.

use rainier_view::{MemoryEngine, View, ViewEngine};

let engine = MemoryEngine::new().with(
    "posts.index",
    "<ul>@foreach(posts as post)<li>{{ post.title }}</li>@endforeach</ul>",
);

let view = View::with("posts.index", serde_json::json!({
    "posts": [{ "title": "Hello & welcome" }],
})).unwrap();

assert_eq!(
    engine.render_view(&view).unwrap(),
    "<ul><li>Hello &amp; welcome</li></ul>",
);

Escaped by default

{{ … }} HTML-escapes; {!! … !!} does not. The safe form is the short one, so the way you write a value without thinking is the way that cannot inject a <script>. Emitting raw HTML is possible but has to be asked for.

A deliberately small language

{{ }}, {!! !!}, @if/@elseif/@else, @foreach, @include, and @extends/@section/@yield. There is no arbitrary expression evaluation and no way to call a function, because a template that can compute is a template that ends up holding business logic. Prepare the data in the controller; let the template lay it out.