From 24dc99affec8c263ac9375e994180d0498f54719 Mon Sep 17 00:00:00 2001
From: ConnorSkees <39542938+ConnorSkees@users.noreply.github.com>
Date: Sun, 16 Feb 2020 15:17:01 -0500
Subject: [PATCH] Include argument name in bounds error

---
 src/builtin/color/hsl.rs | 2 +-
 src/builtin/macros.rs    | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/builtin/color/hsl.rs b/src/builtin/color/hsl.rs
index 94df868..3501875 100644
--- a/src/builtin/color/hsl.rs
+++ b/src/builtin/color/hsl.rs
@@ -88,7 +88,7 @@ pub(crate) fn register(f: &mut BTreeMap<String, Builtin>) {
             v => return Err(format!("$color: {} is not a color.", v).into()),
         };
         let amount = match arg!(args, 1, "amount").eval() {
-            Value::Dimension(n, u) => bound!(n, u, 0, 100) / Number::from(100),
+            Value::Dimension(n, u) => bound!("amount", n, u, 0, 100) / Number::from(100),
             v => return Err(format!("$amount: {} is not a number.", v).into())
         };
         Ok(Value::Color(color.lighten(amount)))
diff --git a/src/builtin/macros.rs b/src/builtin/macros.rs
index c2040a2..67bc8d4 100644
--- a/src/builtin/macros.rs
+++ b/src/builtin/macros.rs
@@ -48,11 +48,11 @@ macro_rules! max_args {
 }
 
 macro_rules! bound {
-    ($arg:ident, $unit:ident, $low:literal, $high:literal) => {
+    ($name:literal, $arg:ident, $unit:ident, $low:literal, $high:literal) => {
         if $arg > Number::from($high) || $arg < Number::from($low) {
             return Err(format!(
-                "Expected {}{} to be within {}{} and {}{}.",
-                $arg, $unit, $low, $unit, $high, $unit,
+                "${}: Expected {}{} to be within {}{} and {}{}.",
+                $name, $arg, $unit, $low, $unit, $high, $unit,
             )
             .into());
         } else {