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patch 9.0.1959: Vim9: methods parameters and types are covariant

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Problem:  Vim9: methods parameters and types are covariant
Solution: Support contra-variant type check for object method arguments
          (similar to Dart).

closes: #12965
closes: #13221

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>
This commit is contained in:
Yegappan Lakshmanan
2023-09-29 22:50:02 +02:00
committed by Christian Brabandt
parent 900894b09a
commit f3b68d4759
7 changed files with 145 additions and 27 deletions
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2
src/proto/vim9class.pro
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@@ -29,5 +29,5 @@ int object_free_nonref(int copyID);
void method_not_found_msg(class_T *cl, vartype_T v_type, char_u *name, size_t len);
void member_not_found_msg(class_T *cl, vartype_T v_type, char_u *name, size_t len);
void f_instanceof(typval_T *argvars, typval_T *rettv);
int class_instance_of(class_T *cl, class_T *other_cl);
int class_instance_of(class_T *cl, class_T *other_cl, int covariance_check);
/* vim: set ft=c : */