Add support for generating namespaced constant

[ranvis]

Add support for generating namespaced constant to gen_stub.php.
The code already has escaping for namespaced constants, but constant instances are not initialized with a residing namespace.

Changes in ext/*.stub.php are to fix namespace of constants which actually are in global.

sample input:

<?php
/** @generate-class-entries */
namespace {
    /** @var null */
    const CONST_NULL = null;
    /** @var bool */
    const CONST_BOOL = true;
    /** @var int */
    const CONST_INT = 1;
    /** @var float */
    const CONST_FLOAT = 1.5;
    /** @var string */
    const CONST_STRING = "str";
    /** @var bool
     *  @cvalue EXTERNAL_BOOL */
    const EXTERN_BOOL = UNKNOWN;
    /** @var int
     *  @cvalue EXTERNAL_INT */
    const EXTERN_INT = UNKNOWN;
    /** @var float
     *  @cvalue EXTERNAL_FLOAT */
    const EXTERN_FLOAT = UNKNOWN;
    /** @var string
     *  @cvalue EXTERNAL_STRING */
    const EXTERN_STRING = UNKNOWN;
}
namespace Not\In\Global {
    /** @var null */
    const CONST_NULL = null;
    /** @var bool */
    const CONST_BOOL = false;
    /** @var int */
    const CONST_INT = -1;
    /** @var float */
    const CONST_FLOAT = -1.5;
    /** @var string */
    const CONST_STRING = "STR";
    /** @var bool
     *  @cvalue EXTERNAL_NS_BOOL */
    const EXTERN_BOOL = UNKNOWN;
    /** @var int
     *  @cvalue EXTERNAL_NS_INT */
    const EXTERN_INT = UNKNOWN;
    /** @var float
     *  @cvalue EXTERNAL_NS_FLOAT */
    const EXTERN_FLOAT = UNKNOWN;
    /** @var string
     *  @cvalue EXTERNAL_NS_STRING */
    const EXTERN_STRING = UNKNOWN;
}

generated code:

static void register_TestConstants_symbols(int module_number)
{
	REGISTER_NULL_CONSTANT("CONST_NULL", CONST_PERSISTENT);
	REGISTER_BOOL_CONSTANT("CONST_BOOL", true, CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("CONST_INT", 1, CONST_PERSISTENT);
	REGISTER_DOUBLE_CONSTANT("CONST_FLOAT", 1.5, CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("CONST_STRING", "str", CONST_PERSISTENT);
	REGISTER_BOOL_CONSTANT("EXTERN_BOOL", EXTERNAL_BOOL, CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("EXTERN_INT", EXTERNAL_INT, CONST_PERSISTENT);
	REGISTER_DOUBLE_CONSTANT("EXTERN_FLOAT", EXTERNAL_FLOAT, CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("EXTERN_STRING", EXTERNAL_STRING, CONST_PERSISTENT);
	REGISTER_NULL_CONSTANT("Not\\In\\Global\\CONST_NULL", CONST_PERSISTENT);
	REGISTER_BOOL_CONSTANT("Not\\In\\Global\\CONST_BOOL", false, CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("Not\\In\\Global\\CONST_INT", -1, CONST_PERSISTENT);
	REGISTER_DOUBLE_CONSTANT("Not\\In\\Global\\CONST_FLOAT", -1.5, CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("Not\\In\\Global\\CONST_STRING", "STR", CONST_PERSISTENT);
	REGISTER_BOOL_CONSTANT("Not\\In\\Global\\EXTERN_BOOL", EXTERNAL_NS_BOOL, CONST_PERSISTENT);
	REGISTER_LONG_CONSTANT("Not\\In\\Global\\EXTERN_INT", EXTERNAL_NS_INT, CONST_PERSISTENT);
	REGISTER_DOUBLE_CONSTANT("Not\\In\\Global\\EXTERN_FLOAT", EXTERNAL_NS_FLOAT, CONST_PERSISTENT);
	REGISTER_STRING_CONSTANT("Not\\In\\Global\\EXTERN_STRING", EXTERNAL_NS_STRING, CONST_PERSISTENT);
}

[ranvis]

@kocsismate Thank you. I've updated the branch.

[kocsismate]

Thank you! IMO, this could be fixed in PHP 8.2 as well, so I'd appreciate if you could change the target branch to PHP-8.2.

[kocsismate]

As far as I see, in order to make the functionality work on PHP 8.2, eithr a @cvalue is needed to be added for \ZendTestNS2\ZEND_CONSTANT_A, or value resolution has to be fixed.

[ranvis]

Thank you for the clue. I think @cvalue looks nicer here.
Also it required an additional care for unknown test of a const inside a namespace for this branch.

Anyway, I appreciate if it could land in 8.2 :)