Start >= 0 already tells us whether or not the loop has a loop
variable, no need to add extra flags to opcodes.
Also added a test for a case where FREE_ON_RETURN is relevant,
we didn't seem to have any coverage for this.
This fixes a regression from 16a9bc1ec2.
Together with the recent closure related changes this should allow
all usages of self etc, while previously (in PHP 5) some things like
self::class did not work.
* Don't throw an error if self/parent/static are used in a closure
(outside a class).
* Don't propagate self:: constants into closures
* Use runtime fetch for self::class in closures
Fixes bug #66811.
we basically added a mechanism to store the token stream during parsing
and exposed the entire parser stack on the tokenizer extension through
an opt in flag: token_get_all($src, TOKEN_PARSE).
this change allows easy future language enhancements regarding context
aware parsing & scanning without further maintance on the tokenizer
extension while solves known inconsistencies "parseless" tokenizer
extension has when it handles `__halt_compiler()` presence.
Also fix a bug with return types where "self" was rejected inside
a class, but not on a method.
Fallout: A couple of tests changed to more generic error messages.
Introduce helper macro FC(x) for CG(file_context).x.
end_compilation() now handled by file_context_end().
While at it, dropped zval wrapper for ticcks.
Renamed compiler_context to oparray_context. Introduced per-file
file_context. Moved import tables into the file_context.
context_stack no longer exists, instead keeping backups of contexts
on C stack. Same for file contexts.
TODO: Move more things out of CG into file_context. There should be
a number of other things that we should not try to reuse in nested
compilations.
* The class names false, true and null are now reserved.
* The code dealing with reserved class names is now decoupled
from scalar type hint handling. It also includes self, parent,
and static, which are class names which were already reserved
previously.
* Reuse existing messages for reserved class names.
Fallout: class_alias() can no longer alias self, parent and static.
However this never really worked in the first place, as the test
which was testing this shows.
