Add shorthand for root operation (#929)

1 files changed, 11 insertions, 0 deletions

diff --git a/src/eval/mod.rs b/src/eval/mod.rs
index 2719c298..fe1fac3b 100644
--- a/src/eval/mod.rs
+++ b/src/eval/mod.rs
@@ -438,6 +438,7 @@ impl Eval for ast::Expr {
             Self::MathDelimited(v) => v.eval(vm).map(Value::Content),
             Self::MathAttach(v) => v.eval(vm).map(Value::Content),
             Self::MathFrac(v) => v.eval(vm).map(Value::Content),
+            Self::MathRoot(v) => v.eval(vm).map(Value::Content),
             Self::Ident(v) => v.eval(vm),
             Self::None(v) => v.eval(vm),
             Self::Auto(v) => v.eval(vm),
@@ -726,6 +727,16 @@ impl Eval for ast::MathFrac {
     }
 }
 
+impl Eval for ast::MathRoot {
+    type Output = Content;
+
+    fn eval(&self, vm: &mut Vm) -> SourceResult<Self::Output> {
+        let index = self.index().map(|i| (vm.items.text)(eco_format!("{i}")));
+        let radicand = self.radicand().eval_display(vm)?;
+        Ok((vm.items.math_root)(index, radicand))
+    }
+}
+
 impl Eval for ast::Ident {
     type Output = Value;