boolean cast

src/Psalm/Internal/Analyzer/FunctionLike/ReturnTypeAnalyzer.php

@@ -170,7 +170,7 @@ class ReturnTypeAnalyzer
 
         $function_always_exits = $control_actions === [ScopeAnalyzer::ACTION_END];
 
-        $function_returns_implicitly = !!array_diff(
+        $function_returns_implicitly = (bool)array_diff(
             $control_actions,
             [ScopeAnalyzer::ACTION_END, ScopeAnalyzer::ACTION_RETURN]
         );

src/Psalm/Internal/Analyzer/ProjectAnalyzer.php

@@ -660,7 +660,7 @@ class ProjectAnalyzer
         $this->codebase->classlikes->consolidateAnalyzedData(
             $this->codebase->methods,
             $this->progress,
-            !!$this->codebase->find_unused_code
+            (bool)$this->codebase->find_unused_code
         );
     }
 

src/Psalm/Internal/Analyzer/Statements/Block/IfElse/ElseIfAnalyzer.php

@@ -159,7 +159,7 @@ class ElseIfAnalyzer
             if (array_filter(
                 $entry_clauses,
                 function ($clause): bool {
-                    return !!$clause->possibilities;
+                    return (bool)$clause->possibilities;
                 }
             )) {
                 $omit_keys = array_reduce(

src/Psalm/Internal/Analyzer/Statements/Block/IfElseAnalyzer.php

@@ -234,7 +234,7 @@ class IfElseAnalyzer
         if (array_filter(
             $context->clauses,
             function ($clause): bool {
-                return !!$clause->possibilities;
+                return (bool)$clause->possibilities;
             }
         )) {
             $omit_keys = array_reduce(

src/Psalm/Internal/Analyzer/Statements/Expression/CallAnalyzer.php

@@ -1027,7 +1027,7 @@ class CallAnalyzer
                     $bounds_with_equality = array_filter(
                         $lower_bounds,
                         function ($lower_bound) {
-                            return !!$lower_bound->equality_bound_classlike;
+                            return (bool)$lower_bound->equality_bound_classlike;
                         }
                     );
 

src/Psalm/Internal/PhpVisitor/Reflector/FunctionLikeNodeScanner.php

@@ -218,7 +218,7 @@ class FunctionLikeNodeScanner
             }
 
             $existing_params['$' . $param_storage->name] = $i;
-            $storage->addParam($param_storage, !!$param->type);
+            $storage->addParam($param_storage, (bool)$param->type);
 
             if (!$param_storage->is_optional && !$param_storage->is_variadic) {
                 $required_param_count = $i + 1;

src/Psalm/Internal/Type/Comparator/UnionTypeComparator.php

@@ -381,7 +381,7 @@ class UnionTypeComparator
             }
         }
 
-        return !!$matching_input_keys;
+        return (bool)$matching_input_keys;
     }
 
     /**

src/Psalm/Type/Union.php

@@ -637,7 +637,7 @@ class Union implements TypeNode
 
     public function hasArrayAccessInterface(Codebase $codebase) : bool
     {
-        return !!array_filter(
+        return (bool)array_filter(
             $this->types,
             function ($type) use ($codebase) {
                 return $type->hasArrayAccessInterface($codebase);