Fix psalm 5.20

src/Xml/Dom/Manipulator/Attribute/rename.php

@@ -21,7 +21,7 @@ function rename(DOMAttr $target, string $newQName, ?string $newNamespaceURI = nu
     $namespace = $newNamespaceURI ?? $target->namespaceURI;
     $value = $target->nodeValue ?? '';
 
-    $builder = $namespace
+    $builder = $namespace !== null
         ? namespaced_attribute($namespace, $newQName, $value)
         : attribute($newQName, $value);
 

src/Xml/Dom/Manipulator/Element/rename.php

@@ -26,7 +26,7 @@ function rename(DOMElement $target, string $newQName, ?string $newNamespaceURI =
     $isRootElement = $target->ownerDocument && $target === $target->ownerDocument->documentElement;
     $parent = $isRootElement ? $target->ownerDocument : parent_element($target);
     $namespace = $newNamespaceURI ?? $target->namespaceURI;
-    $builder = $namespace
+    $builder = $namespace !== null
         ? namespaced_element($namespace, $newQName)
         : element($newQName);
 

src/Xml/Dom/Manipulator/Xmlns/rename.php

@@ -28,7 +28,8 @@
 function rename(DOMDocument $document, string $namespaceURI, string $newPrefix): void
 {
     // Check for prefix collisions
-    if (($existingUri = $document->lookupNamespaceURI($newPrefix)) && $existingUri !== $namespaceURI) {
+    $existingUri = $document->lookupNamespaceURI($newPrefix);
+    if ($existingUri !== null && $existingUri !== $namespaceURI) {
         throw RuntimeException::withMessage(
             sprintf(
                 'Cannot rename the namespace uri %s because the prefix %s is already linked to uri %s',

src/Xml/Dom/Traverser/Visitor/RemoveNamespaces.php

@@ -76,7 +76,7 @@ public function onNodeLeave(DOMNode $node): Action
         }
 
         $namespaces = xmlns_attributes_list($node);
-        if ($this->filter) {
+        if ($this->filter !== null) {
             $namespaces = $namespaces->filter($this->filter);
         }
 

src/Xml/Encoding/Internal/Encoder/Builder/element.php

@@ -51,7 +51,7 @@ function element(string $name, array $data): Closure
 
     /** @var list<Closure(DOMElement): DOMElement> $children */
     $children = filter_nulls([
-        $attributes ? attributes($attributes) : null,
+        $attributes !== null ? attributes($attributes) : null,
         $namedNamespaces ? xmlns_attributes($namedNamespaces) : null,
         $cdata !== null ? childrenBuilder(cdata($cdata)) : null,
         $value !== null ? escaped_value($value) : null,
@@ -66,7 +66,7 @@ function element(string $name, array $data): Closure
         )),
     ]);
 
-    return $currentNamespace
+    return $currentNamespace !== null
         ? namespacedElementBuilder($currentNamespace, $name, ...$children)
         : elementBuilder($name, ...$children);
 }

src/Xml/Reader/Matcher/nested.php

@@ -31,7 +31,7 @@ function nested(callable ... $matchers): Closure
     return static function (NodeSequence $sequence) use ($matchers) : bool {
         $lastMatchedAtIndex = -1;
         $currentMatcher = array_shift($matchers);
-        if (!$currentMatcher) {
+        if ($currentMatcher === null) {
             return false;
         }
 
@@ -51,7 +51,7 @@ function nested(callable ... $matchers): Closure
             // If the list of matchers is empty
             // The function will return true if the element is the last step in the complete sequence.
             // Otherwise, the nested match has an even deeper element on which we don't wish to match.
-            if (!$currentMatcher) {
+            if ($currentMatcher === null) {
                 $isLastStep = $index === $stepCount - 1;
 
                 return $isLastStep;

src/Xml/Reader/Reader.php

@@ -101,6 +101,8 @@ static function () use ($reader): array {
 
                     $pointer->enterElement($element);
                     $outerXml = $matcher($pointer->getNodeSequence()) ? $reader->readOuterXml() : null;
+
+                    /** @psalm-suppress RiskyTruthyFalsyComparison */
                     $match = $outerXml ? new MatchingNode($outerXml, $pointer->getNodeSequence()) : null;
 
                     if ($isEmptyElement) {

src/Xml/Writer/Builder/namespace_attribute.php

@@ -9,6 +9,7 @@
 use XMLWriter;
 
 /**
+ * @param non-empty-string|null $prefix
  * @return Closure(XMLWriter): Generator<bool>
  */
 function namespace_attribute(string $namespace, ?string $prefix = null): Closure
@@ -18,7 +19,7 @@ function namespace_attribute(string $namespace, ?string $prefix = null): Closure
          * @return Generator<bool>
          */
         static function (XMLWriter $writer) use ($namespace, $prefix): Generator {
-            if ($prefix) {
+            if ($prefix !== null) {
                 yield from prefixed_attribute('xmlns', $prefix, $namespace)($writer);
                 return;
             }

src/Xml/Xsd/Schema/Manipulator/overwrite_with_local_files.php

@@ -19,6 +19,7 @@ function overwrite_with_local_files(array $map): Closure
         new SchemaCollection(
             ...$schemas->map(
                 static function (Schema $schema) use ($map): Schema {
+                    /** @psalm-suppress RiskyTruthyFalsyComparison */
                     if (!$namespace = $schema->namespace()) {
                         return $schema;
                     }