Updated expression field

Author: sebprt

examples/config.yaml

@@ -3,7 +3,7 @@ fastmap:
     - field: '[sku]'
       copy: 'input[sku]'
     - field: '[title]'
-      expression: '@=(input["sku"] ~" | "~ input["name"])'
+      expression: 'input["sku"] ~" | "~ input["name"]'
     - field: '[name]'
       copy: '[name]'
     - field: '[staticValue]'

src/Configuration.php

@@ -5,8 +5,7 @@
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 use Symfony\Component\Config\Definition\NodeInterface;
-use function Kiboko\Component\SatelliteToolbox\Configuration\asExpression;
-use function Kiboko\Component\SatelliteToolbox\Configuration\isExpression;
+use Symfony\Component\ExpressionLanguage\Expression;
 
 final class Configuration implements ConfigurationInterface
 {
@@ -260,8 +259,7 @@ private function getChildTreeBuilder(string $name): TreeBuilder
                     ->scalarNode('copy')->end()
                     ->scalarNode('expression')
                         ->validate()
-                            ->ifTrue(isExpression())
-                            ->then(asExpression())
+                            ->always(fn ($data) => new Expression($data))
                         ->end()
                     ->end()
                     ->scalarNode('constant')->end()