Refactor existing method to reduce redundant code.

src/Psalm/Internal/Analyzer/ClassLikeAnalyzer.php

@@ -22,7 +22,6 @@ use Psalm\Plugin\EventHandler\Event\AfterClassLikeExistenceCheckEvent;
 use Psalm\StatementsSource;
 use Psalm\Storage\ClassLikeStorage;
 use Psalm\Type;
-use Psalm\Type\Atomic\TKeyedArray;
 use Psalm\Type\Union;
 use UnexpectedValueException;
 
@@ -31,10 +30,6 @@ use function explode;
 use function gettype;
 use function implode;
 use function in_array;
-use function is_array;
-use function is_float;
-use function is_int;
-use function is_string;
 use function preg_match;
 use function preg_replace;
 use function strtolower;
@@ -517,57 +512,6 @@ abstract class ClassLikeAnalyzer extends SourceAnalyzer
         }
     }
 
-    /**
-     * Gets the Psalm literal type from a particular value
-     *
-     * @param array|scalar|null $value
-     * @throws InvalidArgumentException
-     *
-     */
-    public static function getLiteralTypeFromValue($value, bool $sealed_array = true): Type\Union
-    {
-        if (is_array($value)) {
-            if (empty($value)) {
-                return Type::getEmptyArray();
-            }
-
-            $types = [];
-            /** @var array|scalar|null $val */
-            foreach ($value as $key => $val) {
-                $types[$key] = self::getLiteralTypeFromValue($val, $sealed_array);
-            }
-            $type = new TKeyedArray($types);
-            $type->sealed = $sealed_array;
-            return new Type\Union([$type]);
-        }
-
-        if (is_string($value)) {
-            return Type::getString($value);
-        }
-
-        if (is_int($value)) {
-            return Type::getInt(false, $value);
-        }
-
-        if (is_float($value)) {
-            return Type::getFloat($value);
-        }
-
-        if ($value === false) {
-            return Type::getFalse();
-        }
-
-        if ($value === true) {
-            return Type::getTrue();
-        }
-
-        if ($value === null) {
-            return Type::getNull();
-        }
-
-        throw new InvalidArgumentException();
-    }
-
     /**
      * @param  string[]         $suppressed_issues
      */

src/Psalm/Internal/Codebase/ConstantTypeResolver.php

@@ -2,6 +2,7 @@
 
 namespace Psalm\Internal\Codebase;
 
+use InvalidArgumentException;
 use Psalm\Exception\CircularReferenceException;
 use Psalm\Internal\Analyzer\Statements\Expression\Fetch\ConstFetchAnalyzer;
 use Psalm\Internal\Analyzer\StatementsAnalyzer;
@@ -40,6 +41,7 @@ use Psalm\Type\Union;
 use ReflectionProperty;
 
 use function ctype_digit;
+use function is_array;
 use function is_float;
 use function is_int;
 use function is_string;
@@ -334,10 +336,27 @@ class ConstantTypeResolver
     }
 
     /**
-     * @param  string|int|float|bool|null $value
+     * Note: This takes an array, but any array should only contain other arrays and scalars.
+     *
+     * @param  array|string|int|float|bool|null $value
      */
-    private static function getLiteralTypeFromScalarValue($value): Atomic
+    public static function getLiteralTypeFromScalarValue($value, bool $sealed_array = true): Atomic
     {
+        if (is_array($value)) {
+            if (empty($value)) {
+                return Type::getEmptyArray()->getSingleAtomic();
+            }
+
+            $types = [];
+            /** @var array|scalar|null $val */
+            foreach ($value as $key => $val) {
+                $types[$key] = new Union([self::getLiteralTypeFromScalarValue($val, $sealed_array)]);
+            }
+            $type = new TKeyedArray($types);
+            $type->sealed = $sealed_array;
+            return $type;
+        }
+
         if (is_string($value)) {
             return new TLiteralString($value);
         }
@@ -351,13 +370,17 @@ class ConstantTypeResolver
         }
 
         if ($value === false) {
-            return new TFalse;
+            return new TFalse();
         }
 
         if ($value === true) {
-            return new TTrue;
+            return new TTrue();
         }
 
-        return new TNull;
+        if ($value === null) {
+            return new TNull();
+        }
+
+        throw new InvalidArgumentException('$value must be a scalar.');
     }
 }

src/Psalm/Internal/Codebase/Reflection.php

@@ -171,7 +171,7 @@ class Reflection
         foreach ($class_constants as $name => $value) {
             $storage->constants[$name] = new ClassConstantStorage(
                 ClassLikeAnalyzer::getTypeFromValue($value),
-                ClassLikeAnalyzer::getLiteralTypeFromValue($value),
+                new Union([ConstantTypeResolver::getLiteralTypeFromScalarValue($value)]),
                 ClassLikeAnalyzer::VISIBILITY_PUBLIC,
                 null
             );