Clean up a few error messages

CHANGELOG.md

@@ -1,3 +1,12 @@
+## 1.22.9
+
+* Include argument names when reporting range errors and selector parse errors.
+
+* Avoid double `Error:` headers when reporting selector parse errors.
+
+* Clarify the error message when the wrong number of positional arguments are
+  passed along with a named argument.
+
 ## 1.22.8
 
 ### JavaScript API

lib/src/ast/sass/argument_declaration.dart

@@ -81,6 +81,7 @@ class ArgumentDeclaration implements SassNode {
 
     if (positional > arguments.length) {
       throw SassScriptException("Only ${arguments.length} "
+          "${names.isEmpty ? '' : 'positional '}"
           "${pluralize('argument', arguments.length)} allowed, but "
           "${positional} ${pluralize('was', positional, plural: 'were')} "
           "passed.");

lib/src/value.dart

@@ -120,7 +120,7 @@ abstract class Value implements ext.Value {
     } on SassFormatException catch (error) {
       // TODO(nweiz): colorize this if we're running in an environment where
       // that works.
-      throw _exception(error.toString());
+      throw _exception(error.toString().replaceFirst("Error: ", ""), name);
     }
   }
 
@@ -140,7 +140,7 @@ abstract class Value implements ext.Value {
     } on SassFormatException catch (error) {
       // TODO(nweiz): colorize this if we're running in an environment where
       // that works.
-      throw _exception(error.toString());
+      throw _exception(error.toString().replaceFirst("Error: ", ""), name);
     }
   }
 
@@ -161,7 +161,7 @@ abstract class Value implements ext.Value {
     } on SassFormatException catch (error) {
       // TODO(nweiz): colorize this if we're running in an environment where
       // that works.
-      throw _exception(error.toString());
+      throw _exception(error.toString().replaceFirst("Error: ", ""), name);
     }
   }
 

lib/src/value/number.dart

@@ -209,7 +209,8 @@ class SassNumber extends Value implements ext.SassNumber {
     var result = fuzzyCheckRange(value, min, max);
     if (result != null) return result;
     throw _exception(
-        "Expected $this to be within $min$unitString and $max$unitString.");
+        "Expected $this to be within $min$unitString and $max$unitString.",
+        name);
   }
 
   bool hasUnit(String unit) =>

lib/src/visitor/serialize.dart

@@ -562,7 +562,7 @@ class _SerializeVisitor
       _buffer.writeCharCode($lbracket);
     } else if (value.asList.isEmpty) {
       if (!_inspect) {
-        throw SassScriptException("() isn't a valid CSS value");
+        throw SassScriptException("() isn't a valid CSS value.");
       }
       _buffer.write("()");
       return;

pubspec.yaml

@@ -1,5 +1,5 @@
 name: sass
-version: 1.22.8
+version: 1.22.9-dev
 description: A Sass implementation in Dart.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/sass/dart-sass