Optionally allow trait static calls and property access

config.xsd

@@ -37,6 +37,8 @@
         <xs:attribute name="allowFileIncludes" type="xs:boolean" default="true" />
         <xs:attribute name="allowPhpStormGenerics" type="xs:boolean" default="false" />
         <xs:attribute name="allowStringToStandInForClass" type="xs:boolean" default="false" />
+        <xs:attribute name="allowTraitStaticCall" type="xs:boolean" default="false" />
+        <xs:attribute name="allowTraitStaticPropertyAccess" type="xs:boolean" default="false" />
         <xs:attribute name="checkForThrowsDocblock" type="xs:boolean" default="false" />
         <xs:attribute name="checkForThrowsInGlobalScope" type="xs:boolean" default="false" />
         <xs:attribute name="ensureArrayIntOffsetsExist" type="xs:boolean" default="false" />

src/Psalm/Config.php

@@ -474,6 +474,15 @@ class Config
      */
     public $allow_named_arg_calls = true;
 
+    /**
+     * @var bool
+     */
+    public $allow_trait_static_call = false;
+    /**
+     * @var bool
+     */
+    public $allow_trait_static_property_access = false;
+
     /** @var array<string, mixed> */
     private $predefined_constants = [];
 
@@ -754,6 +763,8 @@ class Config
             'reportInfo' => 'report_info',
             'restrictReturnTypes' => 'restrict_return_types',
             'limitMethodComplexity' => 'limit_method_complexity',
+            'allowTraitStaticCall' => 'allow_trait_static_call',
+            'allowTraitStaticPropertyAccess' => 'allow_trait_static_property_access',
         ];
 
         foreach ($booleanAttributes as $xmlName => $internalName) {

src/Psalm/Internal/Analyzer/Statements/Expression/Call/StaticCallAnalyzer.php

@@ -148,7 +148,7 @@ class StaticCallAnalyzer extends CallAnalyzer
                             : null,
                         $statements_analyzer->getSuppressedIssues(),
                         false,
-                        false,
+                        $codebase->config->allow_trait_static_call,
                         false
                     );
                 }

src/Psalm/Internal/Analyzer/Statements/Expression/Fetch/StaticPropertyFetchAnalyzer.php

@@ -91,7 +91,8 @@ class StaticPropertyFetchAnalyzer
                     $context->self,
                     $context->calling_method_id,
                     $statements_analyzer->getSuppressedIssues(),
-                    false
+                    false,
+                    $codebase->config->allow_trait_static_property_access
                 ) !== true) {
                     return false;
                 }