Commit: patch 9.0.2085: Vim9: abstract can be used in interface

[Christian Brabandt]

patch 9.0.2085: Vim9: abstract can be used in interface

Commit: https://github.com/vim/vim/commit/2b358adde079d7cc8a7f42fcd5627866641c9a59
Author: Yegappan Lakshmanan <yega...@yahoo.com>
Date: Thu Nov 2 20:57:32 2023 +0100

patch 9.0.2085: Vim9: abstract can be used in interface

Problem: Vim9: abstract can be used in interface
Solution: Disallow the use of abstract in an interface

fixes: #13456
closes: #13464

Signed-off-by: Yegappan Lakshmanan <yega...@yahoo.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/errors.h b/src/errors.h
index 26ecf0940..85439ba92 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -3560,8 +3560,10 @@ EXTERN char e_using_typealias_as_string[]
INIT(= N_("E1402: Using type alias \"%s\" as a String"));
EXTERN char e_using_typealias_as_value[]
INIT(= N_("E1403: Type alias \"%s\" cannot be used as a value"));
+EXTERN char e_abstract_cannot_be_used_in_interface[]
+ INIT(= N_("E1404: Abstract cannot be used in an interface"));
#endif
-// E1404 - E1499 unused (reserved for Vim9 class support)
+// E1405 - E1499 unused (reserved for Vim9 class support)
EXTERN char e_cannot_mix_positional_and_non_positional_str[]
INIT(= N_("E1500: Cannot mix positional and non-positional arguments: %s"));
EXTERN char e_fmt_arg_nr_unused_str[]
diff --git a/src/testdir/test_vim9_class.vim b/src/testdir/test_vim9_class.vim
index b3d984124..1f639e2b3 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -5567,7 +5567,26 @@ def Test_abstract_method()
enddef
endclass
END
- v9.CheckSourceSuccess(lines)
+ v9.CheckSourceFailure(lines, 'E1404: Abstract cannot be used in an interface', 3)
+
+ # Use abstract static method in an interface
+ lines =<< trim END
+ vim9script
+ interface A
+ abstract static def Foo()
+ enddef
+ endinterface
+ END
+ v9.CheckSourceFailure(lines, 'E1404: Abstract cannot be used in an interface', 3)
+
+ # Use abstract static variable in an interface
+ lines =<< trim END
+ vim9script
+ interface A
+ abstract static foo: number = 10
+ endinterface
+ END
+ v9.CheckSourceFailure(lines, 'E1404: Abstract cannot be used in an interface', 3)

# Abbreviate the "abstract" keyword
lines =<< trim END
diff --git a/src/version.c b/src/version.c
index 7511e5c18..e136a671e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 2085,
/**/
2084,
/**/
diff --git a/src/vim9class.c b/src/vim9class.c
index ede310b45..08c371389 100644
--- a/src/vim9class.c
+++ b/src/vim9class.c
@@ -1557,26 +1557,27 @@ early_ret:
break;
}

+ p = skipwhite(pa + 8);
+ if (STRNCMP(p, "def", 3) != 0 && STRNCMP(p, "static", 6) != 0)
+ {
+ emsg(_(e_abstract_must_be_followed_by_def_or_static));
+ break;
+ }
+
if (!is_class)
- // ignore "abstract" in an interface (as all the methods in an
- // interface are abstract.
- p = skipwhite(pa + 8);
- else
{
- if (!is_abstract)
- {
- semsg(_(e_abstract_method_in_concrete_class), pa);
- break;
- }
+ // "abstract" not supported in an interface
+ emsg(_(e_abstract_cannot_be_used_in_interface));
+ break;
+ }

- abstract_method = TRUE;
- p = skipwhite(pa + 8);
- if (STRNCMP(p, "def", 3) != 0)
- {
- emsg(_(e_abstract_must_be_followed_by_def));
- break;
- }
+ if (!is_abstract)
+ {
+ semsg(_(e_abstract_method_in_concrete_class), pa);
+ break;
}
+
+ abstract_method = TRUE;
}

int has_static = FALSE;