Intern some known (and offten used) strings.

Add nullable parameter types

This works off of Dmitry's commit for nullable return types

Implement nullable return types.

Allow catching multiple exception types in a single catch statement

This commit add the possibility to catch multiple exception types in
a single catch statement to avoid code duplicatio

Allow catching multiple exception types in a single catch statement

This commit add the possibility to catch multiple exception types in
a single catch statement to avoid code duplication.

try {
// Some code...
} catch (ExceptionType1 | ExceptionType2 $e) {
// Code to handle the exception
} catch (\Exception $e) {
// ...
}

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Remove __halt_compiler from semi-reserved tokens

token_get_all() is not capable of dealing with this one correctly.

Allow specifying keys on list() elements

Squashed commit of the following:

commit 0361dbe35616722fbe51b446ab7b43a9ca01f455
Author: Andrea Faulds <ajf@ajf.me>
Date: Fri Mar

Allow specifying keys on list() elements

Squashed commit of the following:

commit 0361dbe35616722fbe51b446ab7b43a9ca01f455
Author: Andrea Faulds <ajf@ajf.me>
Date: Fri Mar 25 16:59:20 2016 +0000

UPGRADING and NEWS

commit dca9d4a36c845bfe4fbcb9db18e184469110ea5a
Author: Andrea Faulds <ajf@ajf.me>
Date: Fri Mar 25 16:45:18 2016 +0000

Add tests contributed by @jesseschalken

commit e557f77eab692ed8bb18dbdff48777d80b6f6cbd
Author: Andrea Faulds <ajf@ajf.me>
Date: Fri Mar 25 16:44:51 2016 +0000

Rebuild VM

commit 70942e4c3cbb6b4fe6305b27e1e1b2bed78e76df
Author: Andrea Faulds <ajf@ajf.me>
Date: Wed Feb 24 13:12:26 2016 +0000

Add test for evaluation order of nested list() keys

commit ed3592e80c5231d9e9a95558aa768a42b75bdebc
Author: Andrea Faulds <ajf@ajf.me>
Date: Wed Feb 24 12:42:04 2016 +0000

Add test for evaluation order

commit 589756cbcccbb4702c90b5aa9c091af446058ca1
Author: Andrea Faulds <ajf@ajf.me>
Date: Tue Jan 19 17:29:34 2016 +0000

Allow arbitrary expressions for key

commit 3f622077c32fcd82fcf27a41bd0f22e2552ec4c5
Author: Andrea Faulds <ajf@ajf.me>
Date: Tue Jan 19 17:45:10 2016 +0000

Remove compile-time HANDLE_NUMERIC (see bug #63217)

commit bab758119aec63289a2c5bef6a5f90a7bc6441a2
Author: Andrea Faulds <ajf@ajf.me>
Date: Sun Jan 17 01:20:26 2016 +0000

Handle numeric strings

commit 14bfe93ddc34d1175bccb42a158be8842c472a9c
Author: Andrea Faulds <ajf@ajf.me>
Date: Sun Jan 17 01:09:36 2016 +0000

Allow trailing comma

commit f4c8b2cb30fc074b15b5f7aabef5444382403b5d
Author: Andrea Faulds <ajf@ajf.me>
Date: Sat Jan 16 23:47:11 2016 +0000

Add tests

commit 0085884a6176c3a981b53131fbb4fa0c44db2670
Author: Andrea Faulds <ajf@ajf.me>
Date: Sat Jan 16 22:24:23 2016 +0000

Handle non-integer/string opcodes

commit e572d2d0ada6a64b36a2c6f5e8cb57439f51b55e
Author: Andrea Faulds <ajf@ajf.me>
Date: Sat Jan 16 21:10:33 2016 +0000

Disallow mixing keyed and unkeyed list() elements

commit cede13ccfe0c486591fa84764271ac1b8cb90d0b
Author: Andrea Faulds <ajf@ajf.me>
Date: Sun Jan 10 20:46:44 2016 +0000

list() with keys (no foreach or tests)

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Fix bug #71767

bump year which is missed in rev 49493a2

bump year which is missed in rev 49493a2

Implemented the RFC `Support Class Constant Visibility`.

Squashed commit of the following:

commit f11ca0e7a57793fa0e3e7f6d451720e6c42bb0b9
Author: Dmitry Stogov <dmitry@zend.com

Implemented the RFC `Support Class Constant Visibility`.

Squashed commit of the following:

commit f11ca0e7a57793fa0e3e7f6d451720e6c42bb0b9
Author: Dmitry Stogov <dmitry@zend.com>
Date: Tue Dec 8 12:38:42 2015 +0300

Fixed test expectation

commit 211f873f542504d0a0f72b6b5cb23908a1c99a2d
Author: Dmitry Stogov <dmitry@zend.com>
Date: Tue Dec 8 12:28:38 2015 +0300

Embed zend_class_constant.flags into zend_class_constants.value.u2.access_flags

commit 51deab84b2cdbf9cdb1a838cf33b2ee45c61748b
Author: Dmitry Stogov <dmitry@zend.com>
Date: Mon Dec 7 11:18:55 2015 +0300

Fixed issues found by Nikita

commit 544dbd5b47e40d38a8ccb96bc5583e9cb7fdd723
Author: Dmitry Stogov <dmitry@zend.com>
Date: Sat Dec 5 02:41:05 2015 +0300

Refactored immplementation of https://wiki.php.net/rfc/class_const_visibility
@reeze created an RFC here and I emailed internals here and didn't get any responses positive/negative.

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Revert "Improved fix for Fully qualified (leading backslash) type names must fail"

This reverts commit 00865ae22f2c5fdee9e500ce79d442467e0a0899.

Improved fix for Fully qualified (leading backslash) type names must fail

it now all fails with COMPILE_ERROR instead of syntax error for T_ARRAY
but COMPILE_ERROR for int

Fixed bug #70430

Reindent zend_yytnamerr

Separating this whitespace change from the next diff.

Fix bug #70650

adds missing tokens to list of semi-reserved words and regenerates test suite

Don't allow leading \ in group use decl list

We recently added support for "use \Foo\{Bar}". This commit drops
support for the reverse "use Foo\{\Bar}". Those two got mixed up
in the

Don't allow leading \ in group use decl list

We recently added support for "use \Foo\{Bar}". This commit drops
support for the reverse "use Foo\{\Bar}". Those two got mixed up
in the initial implementation.

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fixes a syntactical inconsistency with group use and leading `\`

discussion: http://news.php.net/php.internals/87774

Improved zend_string API (Francois Laupretre)

Squashed commit of the following:

commit d96eab8d79b75ac83d49d49ae4665f948d15a804
Author: Francois Laupretre <francois@tekwire.net>

Improved zend_string API (Francois Laupretre)

Squashed commit of the following:

commit d96eab8d79b75ac83d49d49ae4665f948d15a804
Author: Francois Laupretre <francois@tekwire.net>
Date: Fri Jun 26 01:23:31 2015 +0200

Use the new 'ZSTR' macros in the rest of the code.

Does not change anything to the generated code (thanks to compat macros) but cleaner.

commit b3526439104ac7a89a8e0c79dbebf33b22bd01b8
Author: Francois Laupretre <francois@tekwire.net>
Date: Thu Jun 25 13:45:06 2015 +0200

Improve zend_string API

Add missing methods

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Drop unnecessary %prec

Leftover from a previous implementation

Even fake token better to be in upper case

Fix tokenizer test due to recent changes

Also unreserve T_CLASS

Set %expect to 0 in parser (Using %prec)

Rebuild scanner, add NEWS/UPGRADING