5 files changed, 22 insertions, 21 deletions

diff --git a/src/geom/em.rs b/src/geom/em.rs
index 93dc80e4..9f5aff39 100644
--- a/src/geom/em.rs
+++ b/src/geom/em.rs
@@ -42,6 +42,11 @@ impl Em {
         (self.0).0
     }
 
+    /// The absolute value of this em length.
+    pub fn abs(self) -> Self {
+        Self::new(self.get().abs())
+    }
+
     /// Convert to an absolute length at the given font size.
     pub fn at(self, font_size: Abs) -> Abs {
         let resolved = font_size * self.get();
diff --git a/src/geom/length.rs b/src/geom/length.rs
index 230ea48b..ae615f14 100644
--- a/src/geom/length.rs
+++ b/src/geom/length.rs
@@ -18,6 +18,12 @@ impl Length {
         Self { abs: Abs::zero(), em: Em::zero() }
     }
 
+    /// Try to compute the absolute value of the length.
+    pub fn try_abs(self) -> Option<Self> {
+        (self.abs.is_zero() || self.em.is_zero())
+            .then(|| Self { abs: self.abs.abs(), em: self.em.abs() })
+    }
+
     /// Try to divide two lengths.
     pub fn try_div(self, other: Self) -> Option<f64> {
         if self.abs.is_zero() && other.abs.is_zero() {
diff --git a/src/ide/complete.rs b/src/ide/complete.rs
index 53d4851f..27b81fb2 100644
--- a/src/ide/complete.rs
+++ b/src/ide/complete.rs
@@ -774,7 +774,7 @@ impl<'a> CompletionContext<'a> {
             matches!(
                 value,
                 Value::Func(func) if func.info().map_or(false, |info| {
-                    info.tags.contains(&"math")
+                    info.category == "math"
                 }),
             )
         });
@@ -805,7 +805,7 @@ impl<'a> CompletionContext<'a> {
             !short_form || matches!(
                 value,
                 Value::Func(func) if func.info().map_or(true, |info| {
-                    !info.tags.contains(&"math")
+                    info.category != "math"
                 }),
             )
         });
diff --git a/src/model/eval.rs b/src/model/eval.rs
index 91fe61bb..a9fa2e14 100644
--- a/src/model/eval.rs
+++ b/src/model/eval.rs
@@ -476,10 +476,7 @@ impl Eval for ast::Frac {
     type Output = Content;
 
     fn eval(&self, vm: &mut Vm) -> SourceResult<Self::Output> {
-        Ok((vm.items.math_frac)(
-            self.num().eval(vm)?,
-            self.denom().eval(vm)?,
-        ))
+        Ok((vm.items.math_frac)(self.num().eval(vm)?, self.denom().eval(vm)?))
     }
 }
 
@@ -781,11 +778,7 @@ impl Eval for ast::FieldAccess {
                 .field(&field)
                 .ok_or_else(|| format!("unknown field {field:?}"))
                 .at(span)?,
-            v => bail!(
-                self.target().span(),
-                "cannot access field on {}",
-                v.type_name()
-            ),
+            v => bail!(self.target().span(), "cannot access field on {}", v.type_name()),
         })
     }
 }
diff --git a/src/model/func.rs b/src/model/func.rs
index fb8b3dd0..e47594a1 100644
--- a/src/model/func.rs
+++ b/src/model/func.rs
@@ -37,18 +37,16 @@ impl Func {
 
     /// Create a new function from a native rust function.
     pub fn from_fn(
-        name: &'static str,
         func: fn(&Vm, &mut Args) -> SourceResult<Value>,
         info: FuncInfo,
     ) -> Self {
-        Self(Arc::new(Repr::Native(Native { name, func, set: None, node: None, info })))
+        Self(Arc::new(Repr::Native(Native { func, set: None, node: None, info })))
     }
 
     /// Create a new function from a native rust node.
-    pub fn from_node<T: Node>(name: &'static str, mut info: FuncInfo) -> Self {
+    pub fn from_node<T: Node>(mut info: FuncInfo) -> Self {
         info.params.extend(T::properties());
         Self(Arc::new(Repr::Native(Native {
-            name,
             func: |ctx, args| {
                 let styles = T::set(args, true)?;
                 let content = T::construct(ctx, args)?;
@@ -68,7 +66,7 @@ impl Func {
     /// The name of the function.
     pub fn name(&self) -> Option<&str> {
         match self.0.as_ref() {
-            Repr::Native(native) => Some(native.name),
+            Repr::Native(native) => Some(native.info.name),
             Repr::Closure(closure) => closure.name.as_deref(),
             Repr::With(func, _) => func.name(),
         }
@@ -184,8 +182,6 @@ pub trait FuncType {
 
 /// A function defined by a native rust function or node.
 struct Native {
-    /// The name of the function.
-    name: &'static str,
     /// The function pointer.
     func: fn(&Vm, &mut Args) -> SourceResult<Value>,
     /// The set rule.
@@ -198,7 +194,6 @@ struct Native {
 
 impl Hash for Native {
     fn hash<H: Hasher>(&self, state: &mut H) {
-        self.name.hash(state);
         (self.func as usize).hash(state);
         self.set.map(|set| set as usize).hash(state);
         self.node.hash(state);
@@ -210,8 +205,10 @@ impl Hash for Native {
 pub struct FuncInfo {
     /// The function's name.
     pub name: &'static str,
-    /// Tags that categorize the function.
-    pub tags: &'static [&'static str],
+    /// The display name of the function.
+    pub display: &'static str,
+    /// Which category the function is part of.
+    pub category: &'static str,
     /// Documentation for the function.
     pub docs: &'static str,
     /// The source code of an example, if any.