Problem: Vim9: builtin funcs may accept a non-value
Solution: Restrict builtin functions that accept `type`
This PR finishes off detection and prevention of using a type as a
value. It takes care of builtin functions. However there are some
builtin functions, that need to be able to handle types as well as
non-args: instanceof(), type(), typename(), string().
A "bit", FE_X, is added to funcentry_T; when set, the builtin function
can handle a type (class or type-alias) in addition to a value.
Noteworthy change: Discovered that in compile_call() the builtin add()
is compiled inline instead of calling the builtin. Had to add a check
there.
closes: #13688
Signed-off-by: Ernie Rael <errael@raelity.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: [security]: use-after-free in check_argument_type
Solution: Reset function type pointer when freeing the function type
list
function pointer fp->uf_func_type may point to the same memory, that was
allocated for fp->uf_type_list. However, when cleaning up a function
definition (e.g. because it was invalid), fp->uf_type_list will be
freed, but fp->uf_func_type may still point to the same (now) invalid
memory address.
So when freeing the fp->uf_type_list, check if fp->func_type points to
any of those types and if it does, reset the fp->uf_func_type pointer to
the t_func_any (default) type pointer
closes: #13652
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Vim9: can use typealias in an assignment
Solution: Generate errors when class/typealias involved in the rhs of an
assignment
closes: #13637
Signed-off-by: Ernie Rael <errael@raelity.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Generate errors when class/typealias involved in assignment.
Problem: Object member can't get type from initializer.
Solution: If there is no type specified try to use the type of the
initializer. Check for a valid type.
Problem: Vim9: constant list and dict get a declaration type other than
"any".
Solution: A constant list and dict have a declared member type "any".
(closes#9701)
Problem: Vim9: type checking for list and dict lacks information about
declared type.
Solution: Add dv_decl_type and lv_decl_type. Refactor the type stack to
store two types in each entry.
Problem: Vim9: no type error if assigning a value with type func(number) to
a variable of type func(string).
Solution: Use check_type_maybe(): return MAYBE if a runtime type check is
useful. (issue #8492)
Problem: Vim9: when using function reference type is not checked.
Solution: When using a function reference lookup the type and check the
argument types. (issue #7629)
Problem: Vim9: list<any> is not accepted where list<number> is expected.
Solution: Add functions to allocate and free a type_T, use it in
ISN_CHECKTYPE. (closes#6959)
Problem: Vim9: result of && and || expression cannot be assigned to a bool
at the script level.
Solution: Add the VAR_BOOL_OK flag. Convert to bool when needed.
