bug #35261 [Routing] Fix using a custom matcher & generator dumper cl…

…ass (fancyweb)

This PR was merged into the 4.3 branch.

Discussion
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[Routing] Fix using a custom matcher & generator dumper class

| Q             | A
| ------------- | ---
| Branch?       | 4.3
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

This PR fixes a BC break I encountered while upgrading an existing project from 4.2 to 4.4. In this project I use a custom `generator_dumper_class` that is not a `CompiledUrlGeneratorDumper` (it didn't exist yet). I faced 2 problems:
- The generator is considered "compiled" while it is not. This is because we don't check if the `generator_dumper_class` is effectively a `CompiledUrlGeneratorDumper` to compute the `$compiled` variable. That result in a `\TypeError: Return value of Symfony\Component\Routing\Router::getCompiledRoutes() must be of the type array, int returned`
- My custom dumper is not used at all. This is because of #31964. I altered the condition to fall back only in one way and not the other. The original issue is still fixed (if one uses a classic `UrlGenerator` + a `CompiledUrlGeneratorDumper`, it fall backs on `PhpGeneratorDumper`). However, if one uses a `CompiledUrlGenerator` + a classic `PhpGeneratorDumper` (my case), the classic dumper is still returned. Since `$compiled` is now correctly computed, this case works fine. The Router won't try to get the compiled routes and will use the "old" way.

Commits
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3a840a9 [Routing] Fix using a custom matcher & generator dumper class

src/Symfony/Component/Routing/Router.php

@@ -291,7 +291,7 @@ public function getMatcher()
             return $this->matcher;
         }
 
-        $compiled = is_a($this->options['matcher_class'], CompiledUrlMatcher::class, true) && (UrlMatcher::class === $this->options['matcher_base_class'] || RedirectableUrlMatcher::class === $this->options['matcher_base_class']);
+        $compiled = is_a($this->options['matcher_class'], CompiledUrlMatcher::class, true) && (UrlMatcher::class === $this->options['matcher_base_class'] || RedirectableUrlMatcher::class === $this->options['matcher_base_class']) && is_a($this->options['matcher_dumper_class'], CompiledUrlMatcherDumper::class, true);
 
         if (null === $this->options['cache_dir'] || null === $this->options['matcher_cache_class']) {
             $routes = $this->getRouteCollection();
@@ -348,7 +348,7 @@ public function getGenerator()
             return $this->generator;
         }
 
-        $compiled = is_a($this->options['generator_class'], CompiledUrlGenerator::class, true) && UrlGenerator::class === $this->options['generator_base_class'];
+        $compiled = is_a($this->options['generator_class'], CompiledUrlGenerator::class, true) && UrlGenerator::class === $this->options['generator_base_class'] && is_a($this->options['generator_dumper_class'], CompiledUrlGeneratorDumper::class, true);
 
         if (null === $this->options['cache_dir'] || null === $this->options['generator_cache_class']) {
             $routes = $this->getRouteCollection();
@@ -398,8 +398,8 @@ public function addExpressionLanguageProvider(ExpressionFunctionProviderInterfac
      */
     protected function getGeneratorDumperInstance()
     {
-        // For BC, fallback to PhpGeneratorDumper if the UrlGenerator and UrlGeneratorDumper are not consistent with each other
-        if (is_a($this->options['generator_class'], CompiledUrlGenerator::class, true) !== is_a($this->options['generator_dumper_class'], CompiledUrlGeneratorDumper::class, true)) {
+        // For BC, fallback to PhpGeneratorDumper (which is the old default value) if the old UrlGenerator is used with the new default CompiledUrlGeneratorDumper
+        if (!is_a($this->options['generator_class'], CompiledUrlGenerator::class, true) && is_a($this->options['generator_dumper_class'], CompiledUrlGeneratorDumper::class, true)) {
             return new PhpGeneratorDumper($this->getRouteCollection());
         }
 
@@ -411,8 +411,8 @@ protected function getGeneratorDumperInstance()
      */
     protected function getMatcherDumperInstance()
     {
-        // For BC, fallback to PhpMatcherDumper if the UrlMatcher and UrlMatcherDumper are not consistent with each other
-        if (is_a($this->options['matcher_class'], CompiledUrlMatcher::class, true) !== is_a($this->options['matcher_dumper_class'], CompiledUrlMatcherDumper::class, true)) {
+        // For BC, fallback to PhpMatcherDumper (which is the old default value) if the old UrlMatcher is used with the new default CompiledUrlMatcherDumper
+        if (!is_a($this->options['matcher_class'], CompiledUrlMatcher::class, true) && is_a($this->options['matcher_dumper_class'], CompiledUrlMatcherDumper::class, true)) {
             return new PhpMatcherDumper($this->getRouteCollection());
         }