Reflection: show the type of object constants used as default properties

[DanielEScherzer]

When a property default is based on a global constant, show the type of the default. Previously, format_default_value() assumed that non-scalar and non-array defaults were always going to be IS_CONSTANT_AST pointers, and when the AST expression had been evaluated and produced an object, depending on when the ReflectionClass or ReflectionProperty instance had been created, the default was shown as one of callable or __CLASS__.

Instead, if the default value is an object (IS_OBJECT), show the type of that object.

Add test cases for both of the callable and __CLASS__ cases to confirm that they now properly show the type of the constant.

Closes GH-15902

[DanielEScherzer]

This replaces #15922

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When this is upmerged to 8.4, please keep the IS_OBJECT check with

} else if (Z_TYPE_P(value) == IS_OBJECT) {
	// Show a consistent output with the type of the object, GH-15902
	smart_str_appends(str, "object(");
	smart_str_append(str, Z_OBJCE_P(value)->name);
	smart_str_appends(str, ")");
} else {

when rebasing past 998bce1

[DanielEScherzer]

CC @iluuu1994 @staabm @nielsdos from the original patch

[iluuu1994]

The change LGTM now, thank you for following up!

[iluuu1994]

I don't understand this description, why would it say callable? Maybe that's just what it printed for you due to memory corruption?

[DanielEScherzer]

I have no idea why it would say "callable", but it does - I found that depending on when the reflection object was created it would either say callable or __CLASS__ (or in the case of lazy ghosts, it would say "...")

See my analysis at #15902 (comment)

[nielsdos]

IS_INDIRECT most likely

[DanielEScherzer]

iluuu1994 and nielsdos both approved this - since I don't have the ability to merge patches, can one of you also merge this?