Add support for complex units in CSS

Author: nex3

CHANGELOG.md

@@ -1,3 +1,9 @@
+## 1.96.0
+
+* Allow numbers with complex units (more than one numerator unit or more than
+  zero denominator units) to be emitted to CSS. These are now emitted as
+  `calc()` expressions, which now support complex units in plain CSS.
+
 ## 1.95.0
 
 * Add support for the [CSS-style `if()` function]. In addition to supporting the

lib/src/visitor/serialize.dart

@@ -526,9 +526,6 @@ final class _SerializeVisitor
 
   void _writeCalculationValue(Object value) {
     switch (value) {
-      case SassNumber(hasComplexUnits: true) when !_inspect:
-        throw SassScriptException("$value isn't a valid CSS value.");
-
       case SassNumber(value: double(isFinite: false)):
         switch (value.value) {
           case double.infinity:
@@ -1121,10 +1118,6 @@ final class _SerializeVisitor
     }
 
     if (value.hasComplexUnits) {
-      if (!_inspect) {
-        throw SassScriptException("$value isn't a valid CSS value.");
-      }
-
       visitCalculation(SassCalculation.unsimplified('calc', [value]));
     } else {
       _writeNumber(value.value);

pkg/sass_api/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 17.1.0
+
+* No user-visible changes.
+
 ## 17.0.0
 
 * Rename the old `IfExpression` class to `LegacyIfExpression`.

pkg/sass_api/pubspec.yaml

@@ -2,15 +2,15 @@ name: sass_api
 # Note: Every time we add a new Sass AST node, we need to bump the *major*
 # version because it's a breaking change for anyone who's implementing the
 # visitor interface(s).
-version: 17.0.0
+version: 17.1.0
 description: Additional APIs for Dart Sass.
 homepage: https://github.com/sass/dart-sass
 
 environment:
   sdk: ">=3.6.0 <4.0.0"
 
 dependencies:
-  sass: 1.95.0
+  sass: 1.96.0
 
 dev_dependencies:
   dartdoc: ">=8.0.14 <10.0.0"

pubspec.yaml

@@ -1,5 +1,5 @@
 name: sass
-version: 1.95.0
+version: 1.96.0
 description: A Sass implementation in Dart.
 homepage: https://github.com/sass/dart-sass