lazy template parsing

src/EnvironmentFactory.php

@@ -87,9 +87,7 @@ public function setResourceLimits(ResourceLimits $resourceLimits): EnvironmentFa
 
     public function setRethrowErrors(bool $rethrowErrors = true): EnvironmentFactory
     {
-        $this->defaultRenderContextOptions = new RenderContextOptions(
-            strictVariables: $this->defaultRenderContextOptions->strictVariables,
-            strictFilters: $this->defaultRenderContextOptions->strictFilters,
+        $this->defaultRenderContextOptions = $this->defaultRenderContextOptions->cloneWith(
             rethrowErrors: $rethrowErrors,
         );
 
@@ -98,21 +96,26 @@ public function setRethrowErrors(bool $rethrowErrors = true): EnvironmentFactory
 
     public function setStrictVariables(bool $strictVariables = true): EnvironmentFactory
     {
-        $this->defaultRenderContextOptions = new RenderContextOptions(
+        $this->defaultRenderContextOptions = $this->defaultRenderContextOptions->cloneWith(
             strictVariables: $strictVariables,
-            strictFilters: $this->defaultRenderContextOptions->strictFilters,
-            rethrowErrors: $this->defaultRenderContextOptions->rethrowErrors,
         );
 
         return $this;
     }
 
     public function setStrictFilters(bool $strictFilters = true): EnvironmentFactory
     {
-        $this->defaultRenderContextOptions = new RenderContextOptions(
-            strictVariables: $this->defaultRenderContextOptions->strictVariables,
+        $this->defaultRenderContextOptions = $this->defaultRenderContextOptions->cloneWith(
             strictFilters: $strictFilters,
-            rethrowErrors: $this->defaultRenderContextOptions->rethrowErrors,
+        );
+
+        return $this;
+    }
+
+    public function setLazyParsing(bool $lazyParsing = true): EnvironmentFactory
+    {
+        $this->defaultRenderContextOptions = $this->defaultRenderContextOptions->cloneWith(
+            lazyParsing: $lazyParsing,
         );
 
         return $this;

src/Render/RenderContext.php

@@ -311,13 +311,13 @@ public function getTemplateName(): ?string
         return $this->templateName;
     }
 
-    public function loadPartial(string $templateName, bool $parseIfMissing = false): Template
+    public function loadPartial(string $templateName): Template
     {
         if ($partial = $this->environment->templatesCache->get($templateName)) {
             return $partial;
         }
 
-        if (! $parseIfMissing) {
+        if ($this->options->lazyParsing === false) {
             throw new StandardException(sprintf("The partial '%s' has not be loaded during parsing", $templateName));
         }
 

src/Render/RenderContextOptions.php

@@ -17,5 +17,23 @@ public function __construct(
          * Rethrow exceptions that occur during rendering instead of rendering the error message.
          */
         public readonly bool $rethrowErrors = false,
+        /**
+         * Allow parsing the template when it is rendered if it has not been parsed yet.
+         */
+        public readonly bool $lazyParsing = true,
     ) {}
+
+    public function cloneWith(
+        ?bool $strictVariables = null,
+        ?bool $strictFilters = null,
+        ?bool $rethrowErrors = null,
+        ?bool $lazyParsing = null,
+    ): RenderContextOptions {
+        return new RenderContextOptions(
+            strictVariables: $strictVariables ?? $this->strictVariables,
+            strictFilters: $strictFilters ?? $this->strictFilters,
+            rethrowErrors: $rethrowErrors ?? $this->rethrowErrors,
+            lazyParsing: $lazyParsing ?? $this->lazyParsing,
+        );
+    }
 }

src/Tags/RenderTag.php

@@ -159,7 +159,7 @@ protected function loadPartial(RenderContext $context): Template
             throw new SyntaxException('Template name must be a string');
         }
 
-        return $context->loadPartial($templateName, parseIfMissing: $this->allowDynamicPartials());
+        return $context->loadPartial($templateName);
     }
 
     protected function buildPartialContext(RenderContext $rootContext, string $templateName, array $variables = []): RenderContext