Implement const array/string dereference

RFC:https://wiki.php.net/rfc/constdereference

Fix lexing of nested heredoc strings in token_get_all()

This fixes bug #60097.

Before two global variables CG(heredoc) and CG(heredoc_len) were used to
track the current heredoc

Fix lexing of nested heredoc strings in token_get_all()

This fixes bug #60097.

Before two global variables CG(heredoc) and CG(heredoc_len) were used to
track the current heredoc label. In order to support nested heredoc
strings the *previous* heredoc label was assigned as the token value of
T_START_HEREDOC and the language_parser.y assigned that to CG(heredoc).

This created a dependency of the lexer on the parser. Thus the
token_get_all() function, which accesses the lexer directly without
also running the parser, was not able to tokenize nested heredoc strings
(and leaked memory). Same applies for the source-code highlighting
functions.

The new approach is to maintain a heredoc_label_stack in the lexer, which
contains all active heredoc labels.

As it is no longer required, T_START_HEREDOC and T_END_HEREDOC now don't
carry a token value anymore.

In order to make the work with zend_ptr_stack in this context more
convenient I added a new function zend_ptr_stack_top(), which retrieves the
top element of the stack (similar to zend_stack_top()).

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Improved traits implementation. Now to support __CLASS__ constant in traits php doesn't have to copy the complete compiled method, but can reuse the same code. The resolution of __CLASS__ constants i

Improved traits implementation. Now to support __CLASS__ constant in traits php doesn't have to copy the complete compiled method, but can reuse the same code. The resolution of __CLASS__ constants in methods defined in traits are delayed till run-time. This approach also made possible to use __CLASS__ constant as default value for traits properties and method arguments.

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Improved traits implementation. Now to support __CLASS__ constant in traits php doesn't have to copy the complete compiled method, but can reuse the same code. The resolution of __CLASS__ constants i

Improved traits implementation. Now to support __CLASS__ constant in traits php doesn't have to copy the complete compiled method, but can reuse the same code. The resolution of __CLASS__ constants in methods defined in traits are delayed till run-time. This approach also made possible to use __CLASS__ constant as default value for traits properties and method arguments.

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- Year++

- Year++

- Year++

- Added class member access on instantiation (e.g. (new foo)->bar()) support

- Added class member access on instantiation (e.g. (new foo)->bar()) support

- Drop T_SCALAR_CAST

- Drop T_SCALAR_CAST

Callable typehint following the rules of is_callable($arg, false);

Callable typehint following the rules of is_callable($arg, false);

Added support for Class::{expr}() syntax (Pierrick)

Added support for Class::{expr}() syntax (Pierrick)

Added __TRAIT__ magic constant [TRAITS] [DOC]
# __TRAIT__ behaves like __CLASS__ more or less but is constraint to traits.
# Since traits are not types, there are not many valid use cases, an

Added __TRAIT__ magic constant [TRAITS] [DOC]
# __TRAIT__ behaves like __CLASS__ more or less but is constraint to traits.
# Since traits are not types, there are not many valid use cases, and trying
# to use __TRAIT__ to make traits more like classes is discouraged.

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Added __TRAIT__ magic constant [TRAITS] [DOC]
# __TRAIT__ behaves like __CLASS__ more or less but is constraint to traits.
# Since traits are not types, there are not many valid use cases, an

Added __TRAIT__ magic constant [TRAITS] [DOC]
# __TRAIT__ behaves like __CLASS__ more or less but is constraint to traits.
# Since traits are not types, there are not many valid use cases, and trying
# to use __TRAIT__ to make traits more like classes is discouraged.

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- add short array syntax as defined in https://wiki.php.net/rfc/shortsyntaxforarrays, 2nd solution using => only

- add short array syntax as defined in https://wiki.php.net/rfc/shortsyntaxforarrays, 2nd solution using => only

- Changed zend_resolve_class_name() prototype
# No needed to pass fetch_type as pointer here

- Changed zend_resolve_class_name() prototype
# No needed to pass fetch_type as pointer here

- Fixed bug #55086 (Namespace alias does not work inside trait's use block)
patch by: Pierrick

- Fixed bug #55086 (Namespace alias does not work inside trait's use block)
patch by: Pierrick

- Fixed build on Windows

- Fixed build on Windows