diff vendor/nikic/php-parser/lib/PhpParser/BuilderHelpers.php @ 13:5fb285c0d0e3

Update Drupal core to 8.4.7 via Composer. Security update; I *think* we've
been lucky to get away with this so far, as we don't support self-registration
which seems to be used by the so-called "drupalgeddon 2" attack that 8.4.5
was vulnerable to.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/nikic/php-parser/lib/PhpParser/BuilderHelpers.php	Mon Apr 23 09:33:26 2018 +0100
@@ -0,0 +1,277 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser;
+
+use PhpParser\Node\Expr;
+use PhpParser\Node\Identifier;
+use PhpParser\Node\Name;
+use PhpParser\Node\NullableType;
+use PhpParser\Node\Scalar;
+use PhpParser\Node\Stmt;
+
+/**
+ * This class defines helpers used in the implementation of builders. Don't use it directly.
+ *
+ * @internal
+ */
+final class BuilderHelpers
+{
+    /**
+     * Normalizes a node: Converts builder objects to nodes.
+     *
+     * @param Node|Builder $node The node to normalize
+     *
+     * @return Node The normalized node
+     */
+    public static function normalizeNode($node) : Node {
+        if ($node instanceof Builder) {
+            return $node->getNode();
+        } elseif ($node instanceof Node) {
+            return $node;
+        }
+
+        throw new \LogicException('Expected node or builder object');
+    }
+
+    /**
+     * Normalizes a node to a statement.
+     *
+     * Expressions are wrapped in a Stmt\Expression node.
+     *
+     * @param Node|Builder $node The node to normalize
+     *
+     * @return Stmt The normalized statement node
+     */
+    public static function normalizeStmt($node) : Stmt {
+        $node = self::normalizeNode($node);
+        if ($node instanceof Stmt) {
+            return $node;
+        }
+
+        if ($node instanceof Expr) {
+            return new Stmt\Expression($node);
+        }
+
+        throw new \LogicException('Expected statement or expression node');
+    }
+
+    /**
+     * Normalizes strings to Identifier.
+     *
+     * @param string|Identifier $name The identifier to normalize
+     *
+     * @return Identifier The normalized identifier
+     */
+    public static function normalizeIdentifier($name) : Identifier {
+        if ($name instanceof Identifier) {
+            return $name;
+        }
+
+        if (\is_string($name)) {
+            return new Identifier($name);
+        }
+
+        throw new \LogicException('Expected string or instance of Node\Identifier or Node\Expr');
+    }
+
+    /**
+     * Normalizes strings to Identifier, also allowing expressions.
+     *
+     * @param string|Identifier|Expr $name The identifier to normalize
+     *
+     * @return Identifier|Expr The normalized identifier or expression
+     */
+    public static function normalizeIdentifierOrExpr($name) {
+        if ($name instanceof Identifier || $name instanceof Expr) {
+            return $name;
+        }
+
+        if (\is_string($name)) {
+            return new Identifier($name);
+        }
+
+        throw new \LogicException('Expected string or instance of Node\Identifier or Node\Expr');
+    }
+
+    /**
+     * Normalizes a name: Converts string names to Name nodes.
+     *
+     * @param Name|string $name The name to normalize
+     *
+     * @return Name The normalized name
+     */
+    public static function normalizeName($name) : Name {
+        return self::normalizeNameCommon($name, false);
+    }
+
+    /**
+     * Normalizes a name: Converts string names to Name nodes, while also allowing expressions.
+     *
+     * @param Expr|Name|string $name The name to normalize
+     *
+     * @return Name|Expr The normalized name or expression
+     */
+    public static function normalizeNameOrExpr($name) {
+        return self::normalizeNameCommon($name, true);
+    }
+
+    /**
+     * Normalizes a name: Converts string names to Name nodes, optionally allowing expressions.
+     *
+     * @param Expr|Name|string $name      The name to normalize
+     * @param bool             $allowExpr Whether to also allow expressions
+     *
+     * @return Name|Expr The normalized name, or expression (if allowed)
+     */
+    private static function normalizeNameCommon($name, bool $allowExpr) {
+        if ($name instanceof Name) {
+            return $name;
+        } elseif (is_string($name)) {
+            if (!$name) {
+                throw new \LogicException('Name cannot be empty');
+            }
+
+            if ($name[0] === '\\') {
+                return new Name\FullyQualified(substr($name, 1));
+            } elseif (0 === strpos($name, 'namespace\\')) {
+                return new Name\Relative(substr($name, strlen('namespace\\')));
+            } else {
+                return new Name($name);
+            }
+        }
+
+        if ($allowExpr) {
+            if ($name instanceof Expr) {
+                return $name;
+            }
+            throw new \LogicException(
+                'Name must be a string or an instance of Node\Name or Node\Expr'
+            );
+        } else {
+            throw new \LogicException('Name must be a string or an instance of Node\Name');
+        }
+    }
+
+    /**
+     * Normalizes a type: Converts plain-text type names into proper AST representation.
+     *
+     * In particular, builtin types become Identifiers, custom types become Names and nullables
+     * are wrapped in NullableType nodes.
+     *
+     * @param string|Name|Identifier|NullableType $type The type to normalize
+     *
+     * @return Name|Identifier|NullableType The normalized type
+     */
+    public static function normalizeType($type) {
+        if (!is_string($type)) {
+            if (!$type instanceof Name && !$type instanceof Identifier
+                    && !$type instanceof NullableType) {
+                throw new \LogicException(
+                    'Type must be a string, or an instance of Name, Identifier or NullableType');
+            }
+            return $type;
+        }
+
+        $nullable = false;
+        if (strlen($type) > 0 && $type[0] === '?') {
+            $nullable = true;
+            $type = substr($type, 1);
+        }
+
+        $builtinTypes = [
+            'array', 'callable', 'string', 'int', 'float', 'bool', 'iterable', 'void', 'object'
+        ];
+
+        $lowerType = strtolower($type);
+        if (in_array($lowerType, $builtinTypes)) {
+            $type = new Identifier($lowerType);
+        } else {
+            $type = self::normalizeName($type);
+        }
+
+        if ($nullable && (string) $type === 'void') {
+            throw new \LogicException('void type cannot be nullable');
+        }
+
+        return $nullable ? new Node\NullableType($type) : $type;
+    }
+
+    /**
+     * Normalizes a value: Converts nulls, booleans, integers,
+     * floats, strings and arrays into their respective nodes
+     *
+     * @param Node\Expr|bool|null|int|float|string|array $value The value to normalize
+     *
+     * @return Expr The normalized value
+     */
+    public static function normalizeValue($value) : Expr {
+        if ($value instanceof Node\Expr) {
+            return $value;
+        } elseif (is_null($value)) {
+            return new Expr\ConstFetch(
+                new Name('null')
+            );
+        } elseif (is_bool($value)) {
+            return new Expr\ConstFetch(
+                new Name($value ? 'true' : 'false')
+            );
+        } elseif (is_int($value)) {
+            return new Scalar\LNumber($value);
+        } elseif (is_float($value)) {
+            return new Scalar\DNumber($value);
+        } elseif (is_string($value)) {
+            return new Scalar\String_($value);
+        } elseif (is_array($value)) {
+            $items = [];
+            $lastKey = -1;
+            foreach ($value as $itemKey => $itemValue) {
+                // for consecutive, numeric keys don't generate keys
+                if (null !== $lastKey && ++$lastKey === $itemKey) {
+                    $items[] = new Expr\ArrayItem(
+                        self::normalizeValue($itemValue)
+                    );
+                } else {
+                    $lastKey = null;
+                    $items[] = new Expr\ArrayItem(
+                        self::normalizeValue($itemValue),
+                        self::normalizeValue($itemKey)
+                    );
+                }
+            }
+
+            return new Expr\Array_($items);
+        } else {
+            throw new \LogicException('Invalid value');
+        }
+    }
+
+    /**
+     * Normalizes a doc comment: Converts plain strings to PhpParser\Comment\Doc.
+     *
+     * @param Comment\Doc|string $docComment The doc comment to normalize
+     *
+     * @return Comment\Doc The normalized doc comment
+     */
+    public static function normalizeDocComment($docComment) : Comment\Doc {
+        if ($docComment instanceof Comment\Doc) {
+            return $docComment;
+        } elseif (is_string($docComment)) {
+            return new Comment\Doc($docComment);
+        } else {
+            throw new \LogicException('Doc comment must be a string or an instance of PhpParser\Comment\Doc');
+        }
+    }
+
+    /**
+     * Adds a modifier and returns new modifier bitmask.
+     *
+     * @param int $modifiers Existing modifiers
+     * @param int $modifier  Modifier to set
+     *
+     * @return int New modifiers
+     */
+    public static function addModifier(int $modifiers, int $modifier) : int {
+        Stmt\Class_::verifyModifier($modifiers, $modifier);
+        return $modifiers | $modifier;
+    }
+}