Merge branch 'PHP-8.1' into PHP-8.2

* PHP-8.1:
Unary minus const expression consistency

Unary minus const expression consistency

- of 0.0 should result in -0.0

Closes GH-10978

Merge branch 'PHP-8.1' into PHP-8.2

* PHP-8.1:
Fix GH-9769: Misleading error message for unpacking of objects

Fix GH-9769: Misleading error message for unpacking of objects

Only arrays can be unpacked in constant expressions.

Closes GH-9776.

Remove unnecessary ast eval bailout

We can just reset the filename_override to NULL in php_request_shutdown.

Closes GH-9805

Merge branch 'PHP-8.1' into PHP-8.2

* PHP-8.1:
Fix class name FQN when AST dumping new and class const

Fix class name FQN when AST dumping new and class const

Fixes GH-9447
Closes GH-9462

Fix arrow function with never return type

Fixes GH-7900
Closes GH-9103

GH-8344 Fetch properties of enums in const expressions

Allow arbitrary const expressions in backed enums

Closes GH-7821
Closes GH-8190
Closes GH-8418

Add support for readonly classes (#7305)

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

Merge branch 'PHP-8.1'

* PHP-8.1:
Fix preloading of constants containing enums

Fix preloading of constants containing enums

Fixes GH-8133

Reset EG(filename_override) after fatal error

Fixes oss-fuzz #45492

Adjust filename/lineno for constant expressions

Closes GH-7771
Closes GH-8124

Merge concatenated literal strings while compiling. (#7948)


The output of token_get_all is unaffected, so projects such as the userland
nikic/php-parser are unaffected.

Ext

Merge concatenated literal strings while compiling. (#7948)


The output of token_get_all is unaffected, so projects such as the userland
nikic/php-parser are unaffected.

Extensions such as nikic/php-ast which expose the internal php ast would see
literals be flattened, though.

This makes php significantly faster at parsing code such as
`$x = eval('return ' . var_export(str_repeat("\0", 100), true) . ';');`
and avoids the stack overflow from recursing 100000 times in
zend_eval_const_expr to process `'' . "\0" . '' . "\0" . ...`

Closes GH-7946

* Don't create binary op if unnecessary
* Update Zend/zend_ast.c

Co-authored-by: Nikita Popov <nikita.ppv@googlemail.com>

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Fix bug #81611

Add zend_fetch_class_with_scope() which accepts a scope to use for
self/parent, and use that during constant expression evaluation.

Closes GH-7649.

Export AST for default value strings in reflection

When dumping default values in ReflectionXXX::__toString(), for
expression initializers print the AST export instead of trying to
e

Export AST for default value strings in reflection

When dumping default values in ReflectionXXX::__toString(), for
expression initializers print the AST export instead of trying to
evaluate the expression. With the introduction of "new in
initializers" the result of the evaluation will commonly not be
printable at all, and "__toString" will throw an exception, which
is not particularly useful. Using the AST export also provides more
information on how the parameter was originally declared, e.g. it
preserves the fact that a certain constant was used.

Closes GH-7540.

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Use array_set_zval_key() in zend_ast_add_array_element()

This reimplemented basically the same logic.

Fix AST print of first class callable in anon class expr

This will cause a compile error later, but the expression is
printed first.

Fixes oss-fuzz #37473.

Add additional double to string APIs

zend_double_to_str() converts a double to string in the way that
(string) would (using %.*H using precision).

smart_str_append_double() prov

Add additional double to string APIs

zend_double_to_str() converts a double to string in the way that
(string) would (using %.*H using precision).

smart_str_append_double() provides some more fine control over
the precision, and whether a zero fraction should be appeneded
for whole numbers.

A caveat here is that raw calls to zend_gcvt and going through
s*printf has slightly different behavior for the degenarate
precision=0 case. zend_gcvt will add a dummy E+0 in that case,
while s*printf convert this to precision=1 and will not. I'm
going with the s*printf behavior here, which is more common,
but does result in a minor change to the precision.phpt test.

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Handle missing class when evaluating CONST_ENUM_INIT

When resolving constants on a dynamically declared class during
preloading, the enum class may not be available. Fail gracefully

Handle missing class when evaluating CONST_ENUM_INIT

When resolving constants on a dynamically declared class during
preloading, the enum class may not be available. Fail gracefully
in that case.

Possibly we shouldn't be trying to evaluate constants on
non-linked classes at all?

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Add support for internal enums

This adds support for internal enums with the same basic approach
as userland enums. Enum values are stored as CONSTANT_AST and
objects created during

Add support for internal enums

This adds support for internal enums with the same basic approach
as userland enums. Enum values are stored as CONSTANT_AST and
objects created during constant updating at runtime. This means
that we need to use mutable_data for internal enums.

This just adds basic support and APIs, it does not include the
stubs integration from #7212.

Closes GH-7302.

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Implement readonly properties

Add support for readonly properties, for which only a single
initializing assignment from the declaring scope is allowed.

RFC: https://wiki.php.net

Implement readonly properties

Add support for readonly properties, for which only a single
initializing assignment from the declaring scope is allowed.

RFC: https://wiki.php.net/rfc/readonly_properties_v2

Closes GH-7089.

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Fix assert with attribute + first-class callable in assert

This is going to result in a compile-time error, but AST printing
is invoked first and should handle it gracefully. Handle it b

Fix assert with attribute + first-class callable in assert

This is going to result in a compile-time error, but AST printing
is invoked first and should handle it gracefully. Handle it by
falling back to more generic printing code.

Fixes oss-fuzz #36264.

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