Ignore inheritance rules on private methods

Closes GH-5401

Fix free of uninitialized memory in MATCH_ERROR

As suggested by Tyson Andre:
https://github.com/php/php-src/pull/5371#issuecomment-657081464

Also fix line number of unhandled ma

Fix free of uninitialized memory in MATCH_ERROR

As suggested by Tyson Andre:
https://github.com/php/php-src/pull/5371#issuecomment-657081464

Also fix line number of unhandled match error

Closes GH-5841.

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Review the usage of apostrophes in error messages

Closes GH-5590

Add missing addref for MATCH_ERROR operand

Implement match expression

RFC: https://wiki.php.net/rfc/match_expression_v2

Closes GH-5371.

Skip special function optimization for redeclared disabled functions

As pointed out on GH-5817.

Fixed bug #79783

Make sure we don't drop the by-reference check when passing the
result of a VM builtin function.

refactor: class constants parsing

As part of my work on typed class constants, I wanted to make a
separate pull request for unrelated changes.

These include:

* Moving

refactor: class constants parsing

As part of my work on typed class constants, I wanted to make a
separate pull request for unrelated changes.

These include:

* Moving from ast->child[0]->attr to ast->attr
* Making zend_ast_export_ex() export class constants' visibility
* Extracting an additional zend_compile_class_const_group() function

Closes GH-5812.

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Treat attribute argument lists like normal argument lists

Allow trailing comma. Syntactically allow unpacking, but forbid it
during compilation.

The trailing comma test-case is

Treat attribute argument lists like normal argument lists

Allow trailing comma. Syntactically allow unpacking, but forbid it
during compilation.

The trailing comma test-case is adopted from GH-5796.

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Implement Attribute Amendments.

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

Support for attribute grouping is left out, because the short
attribute syntax RFC will likely

Implement Attribute Amendments.

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

Support for attribute grouping is left out, because the short
attribute syntax RFC will likely make it obsolete.

Closes GH-5751.

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Cache __unserialize() instead of unserialize()

We should use these cache slots for the new object serialization
mechanism rather than the old one.

Fixed bug #79740

Use ZEND_TOSTRING_FUNC_NAME

Closes GH-5736.

Use zend_is_constructor()

Use ZEND_UNREACHABLE() instead of ZEND_ASSERT(0)

Instead of marking unreachable code with `ZEND_ASSERT(0)`, we introduce
`ZEND_UNREACHABLE()`, so that MSVC which does not consider `asser

Use ZEND_UNREACHABLE() instead of ZEND_ASSERT(0)

Instead of marking unreachable code with `ZEND_ASSERT(0)`, we introduce
`ZEND_UNREACHABLE()`, so that MSVC which does not consider `assert(0)`
to mark unreachable code does no longer trigger C4715[1] warnings in
debug builds. This may be useful for other compilers as well.

[1] <https://docs.microsoft.com/de-de/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4715?view=vs-2019>

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Add helper APIs for maybe-interned string creation

Add ZVAL_CHAR/RETVAL_CHAR/RETURN_CHAR as a shortcut for using
ZVAL_INTERNED_STRING and ZSTR_CHAR.

Add zend_string_init_fast()

Add helper APIs for maybe-interned string creation

Add ZVAL_CHAR/RETVAL_CHAR/RETURN_CHAR as a shortcut for using
ZVAL_INTERNED_STRING and ZSTR_CHAR.

Add zend_string_init_fast() as a helper for the empty string /
one char interned string / zend_string_init() pattern.

Also add corresponding ZVAL_STRINGL_FAST etc macros.

Closes GH-5684.

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Fix bug #77966: Cannot alias a method named "namespace"

This is a bit tricky: In this cases we have "namespace as", which
means that we will only recognize "namespace" as an identifier w

Fix bug #77966: Cannot alias a method named "namespace"

This is a bit tricky: In this cases we have "namespace as", which
means that we will only recognize "namespace" as an identifier when
the lookahead token is already at the "as". This means that
zend_lex_tstring picks up the wrong identifier.

We solve this by actually assigning the identifier as the semantic
value on the parser stack -- as in almost all cases we will not
actually need the identifier, this is just an (offset, size)
reference, not a copy of the string.

Additionally, we need to teach the lexer feedback mechanism used
by tokenizer TOKEN_PARSE mode to apply feedback to something
other than the very last token. To that purpose we pass through
the token text and check the tokens in reverse order to find the
right one.

Closes GH-5668.

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Constify char * arguments of APIs

Closes GH-5676.

Fix expression warnings and break warnings

Close GH-5675.

Implement "Constructor Promotion" RFC

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

Closes GH-5291.

Add Attributes

Co-authored-by: Martin Schröder <m.schroeder2007@gmail.com>

Fix #79652 Ensure that the mixed type is displayed instead of the union of all types

Closes GH-56430

Fix variable type

This is no longer a boolean.

Allow generators to have a real return type of `mixed` or `object`

Fixes an edge case overlooked in
https://github.com/php/php-src/pull/5313

Generators are objects, so `object`

Allow generators to have a real return type of `mixed` or `object`

Fixes an edge case overlooked in
https://github.com/php/php-src/pull/5313

Generators are objects, so `object` should have also been allowed in addition to
`iterable` and `Traversable`

Closes GH-5626

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Support catching exceptions without capturing them to variables

RFC: https://wiki.php.net/rfc/non-capturing_catches

Closes GH-5345.