Move AST_AND, AST_OR to AST_BINARY_OP as well

Use v20 instead, add to flag list

Added tests

Convert unary ops to flags of ZEND_AST_UNARY_OP

Use string child names for non-list nodes

Implementation needs some polishing.

Use X macro for global strings

I plan on adding more of these, so drop all the repetition.

Also add AST_STR() macro to abstract the naming convention.

Use BINARY_ flags for ASSIGN_OP as well

Makes it easier to work with if both use the same flags

Use AST_BINARY_OP instead of AST_GREATER(_EQUAL)

Version 20

Add $version parameter

Switch to zpp_throw

Zpp failures now result in a TypeError. All failure conditions
should be throwing now.

Added flag constants for AST_INCLUDE_OR_EVAL

The flags' integral values match the values defined in
Zend/zend_compile.h

Only use 3 children for AST_CLASS

Also add a test for class AST.

Add constants for POW, ASSING_POW, SPACESHIP

Update flags for group use declarations

Now the type may also be on GROUP_USE and USE_ELEM

Test get_kind_name()

Also switch it to throw LogicException.

Improve AST_CLOSURE_VAR implementation

* Simplify code by combining nearly completely duplicate function
* Add AST_CLOSURE_VAR to generate_ast_data.php
* Add test
* Adjust README

Add virtual AST_CLOSURE_VAR node Without this you couldn't distinguish a by-ref closure use var

Support passing $filename to parse_code()

Throw exception on not existing file

Fix leaks, add some tests

Add parse_file() function

Small cleanups

* use ZVAL_STR_COPY
* Don't use cache slot for Node\Decl

Show return type hints

Decls now have 4 children and the last one is a name.

Use ast\Node\Decl for declarations

Not including property declarations, as those do not use decl
layout.

Store the decl name as well if present