1 files changed, 36 insertions, 0 deletions
diff --git a/crates/typst-library/src/math/class.rs b/crates/typst-library/src/math/class.rs
new file mode 100644
index 00000000..0d6a370b
--- /dev/null
+++ b/crates/typst-library/src/math/class.rs
@@ -0,0 +1,36 @@
+use super::*;
+
+/// Forced use of a certain math class.
+///
+/// This is useful to treat certain symbols as if they were of a different
+/// class, e.g. to make text behave like a binary operator.
+///
+/// # Example
+/// ```example
+/// $x class("relation", "<=") 5$
+/// ```
+///
+/// Display: Class
+/// Category: math
+#[element(LayoutMath)]
+pub struct ClassElem {
+    /// The class to apply to the content.
+    #[required]
+    pub class: MathClass,
+
+    /// The content to which the class is applied.
+    #[required]
+    pub body: Content,
+}
+
+impl LayoutMath for ClassElem {
+    fn layout_math(&self, ctx: &mut MathContext) -> SourceResult<()> {
+        ctx.style(ctx.style.with_class(self.class()));
+        let mut fragment = ctx.layout_fragment(&self.body())?;
+        ctx.unstyle();
+
+        fragment.set_class(self.class());
+        ctx.push(fragment);
+        Ok(())
+    }
+}