Run with updated php-cs-fixer

Avoid by-reference iteration in NodeTraverser

No need to create reference wrappers around every element in the
array.

Remove superfluous phpdoc tags

These just specify a type that is already specified as a real PHP
type.

Add property types

Types omitted in two places where we violate them currently:
Namespace_::$stmts can be null during parsing, and Enum_::$scalarType
can be a complex type for invali

Add property types

Types omitted in two places where we violate them currently:
Namespace_::$stmts can be null during parsing, and Enum_::$scalarType
can be a complex type for invalid programs.

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Allow passing visitors to NodeTraverser constructor

Don't take subnodes by reference when traversing

Explicitly assign the property where necessary to avoid the
creation of unnecessary reference-wrappers everywhere.

Remove unnecessary Node return value from traverseNode()

The node always stays the same: We may only change subnodes.

Add support for NodeVisitor::REPLACE_WITH_NULL

Fixes #716.

Call leaveNode() on visitors in reverse order

Node visitation is now properly nested. The call sequence will
now be

$visitor1->enterNode($n);
$visitor2->enterNode($n

Call leaveNode() on visitors in reverse order

Node visitation is now properly nested. The call sequence will
now be

$visitor1->enterNode($n);
$visitor2->enterNode($n);
$visitor2->leaveNode($n);
$visitor1->leaveNode($n);

rather than

$visitor1->enterNode($n);
$visitor2->enterNode($n);
$visitor1->leaveNode($n);
$visitor2->leaveNode($n);

Fixes #899.

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Ensure removing visitor does not leave holes

Move constants from NodeTraverser to NodeVisitor

These are really part of the NodeVisitor API. Retain aliases for
compatibility.

Declare list types (#907)

Closes #905

Add missing return types

Add missing parameter types

Add tools/ directory

With php-cs-fixer and phpstan. Also reformat one file.

Use PHPStan level 5

Support array return from enterNode()

This uses the same semantics as arrays from leaveNode(), i.e. the
returned nodes will not be visited by other visitors. This is open
to change t

Support array return from enterNode()

This uses the same semantics as arrays from leaveNode(), i.e. the
returned nodes will not be visited by other visitors. This is open
to change though (but probably should change for both enterNode()
and leaveNode() if it does change?)

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Support REMOVE_NODE from enterNode()

Add php-cs-fixer config and reformat

The formatting in this project has become something of a mess,
because it changed over time. Add a CS fixer config and reformat
to the desired st

Add php-cs-fixer config and reformat

The formatting in this project has become something of a mess,
because it changed over time. Add a CS fixer config and reformat
to the desired style, which is PSR-12, but with sane brace placement.

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Add visibility modifiers to constants

Closes GH-848.

Add new constant to be returned from enterNode() to not traverse current and child nodes (#536)

* Add new constant to be returned from enterNode() to not travers current node for subsequent

Add new constant to be returned from enterNode() to not traverse current and child nodes (#536)

* Add new constant to be returned from enterNode() to not travers current node for subsequent visitors and skip children traversing

* Allow visitors to replace nodes in leaveNode() when DONT_TRAVERSE_CURRENT_AND_CHILDREN is used

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Remove NodeTraverser dependency on parent::__construct() (#528)

A parent::__construct() call is now optional when extending NodeTraverser.

Add replacement sanity check in traverser

[CS] Use elseif instead of else if

Conflicts:
lib/PhpParser/TokenStream.php

Add strict_types to lib code