Introduce `fr`s

3 files changed, 7 insertions, 0 deletions

diff --git a/src/syntax/expr.rs b/src/syntax/expr.rs
index e0135d1c..4dac9c59 100644
--- a/src/syntax/expr.rs
+++ b/src/syntax/expr.rs
@@ -24,6 +24,8 @@ pub enum Expr {
     /// _Note_: `50%` is stored as `50.0` here, but as `0.5` in the
     /// corresponding [value](crate::geom::Relative).
     Percent(Span, f64),
+    /// A fraction unit literal: `1fr`.
+    Fractional(Span, f64),
     /// A color literal: `#ffccee`.
     Color(Span, RgbaColor),
     /// A string literal: `"hello!"`.
@@ -73,6 +75,7 @@ impl Expr {
             Self::Length(span, _, _) => span,
             Self::Angle(span, _, _) => span,
             Self::Percent(span, _) => span,
+            Self::Fractional(span, _) => span,
             Self::Color(span, _) => span,
             Self::Str(span, _) => span,
             Self::Ident(ref v) => v.span,
diff --git a/src/syntax/token.rs b/src/syntax/token.rs
index 9098f176..56ab3dd6 100644
--- a/src/syntax/token.rs
+++ b/src/syntax/token.rs
@@ -133,6 +133,8 @@ pub enum Token<'s> {
     /// _Note_: `50%` is stored as `50.0` here, as in the corresponding
     /// [literal](super::Expr::Percent).
     Percent(f64),
+    /// A fraction unit: `3fr`.
+    Fraction(f64),
     /// A color value: `#20d82a`.
     Color(RgbaColor),
     /// A quoted string: `"..."`.
@@ -258,6 +260,7 @@ impl<'s> Token<'s> {
             Self::Length(_, _) => "length",
             Self::Angle(_, _) => "angle",
             Self::Percent(_) => "percentage",
+            Self::Fraction(_) => "`fr` value",
             Self::Color(_) => "color",
             Self::Str(_) => "string",
             Self::LineComment(_) => "line comment",
diff --git a/src/syntax/visit.rs b/src/syntax/visit.rs
index 86481d4e..ba7555f2 100644
--- a/src/syntax/visit.rs
+++ b/src/syntax/visit.rs
@@ -80,6 +80,7 @@ visit! {
             Expr::Length(_, _, _) => {}
             Expr::Angle(_, _, _) => {}
             Expr::Percent(_, _) => {}
+            Expr::Fractional(_, _) => {}
             Expr::Color(_, _) => {}
             Expr::Str(_, _) => {}
             Expr::Ident(_) => {}