Commit: patch 9.0.1920: Vim9: cannot write public var in nested object

[Christian Brabandt]

patch 9.0.1920: Vim9: cannot write public var in nested object

Commit: https://github.com/vim/vim/commit/98e68c07ce229148c994a42ead9f010b0d0a1be4
Author: Ernie Rael <err...@raelity.com>
Date: Wed Sep 20 20:13:06 2023 +0200

patch 9.0.1920: Vim9: cannot write public var in nested object

Problem: Vim9: cannot write public var in nested object
Solution: Write variable in nested read-only object reference.
Also test write fails.

closes: #13130
closes: #13131

Signed-off-by: Christian Brabandt <c...@256bit.org>
Co-authored-by: Ernie Rael <err...@raelity.com>

diff --git a/src/eval.c b/src/eval.c
index 931d51045..93b840e61 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -1564,6 +1564,9 @@ get_lval(
om->ocm_name);
return NULL;
case VIM_ACCESS_READ:
+ // If [idx] or .key following, read only OK.
+ if (*p == '[' || *p == '.')
+ break;
if ((flags & GLV_READ_ONLY) == 0)
{
semsg(_(e_member_is_not_writable_str),
diff --git a/src/testdir/test_vim9_class.vim b/src/testdir/test_vim9_class.vim
index 763b5a539..f57bf44d0 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -613,8 +613,63 @@ def Test_assignment_nested_type()
enddef

Test_assign_to_nested_typed_member()
+
+ var script_inner = Inner.new(0)
+ var script_outer = Outer.new(script_inner)
+ script_outer.inner.value = 1
+ assert_equal(1, script_inner.value)
END
v9.CheckSourceSuccess(lines)
+
+ # Assignment where target item is read only in :def
+ lines =<< trim END
+ vim9script
+
+ class Inner
+ this.value: number = 0
+ endclass
+
+ class Outer
+ this.inner: Inner
+ endclass
+
+ def F(outer: Outer)
+ outer.inner.value = 1
+ enddef
+
+ def Test_assign_to_nested_typed_member()
+ var inner = Inner.new(0)
+ var outer = Outer.new(inner)
+ F(outer)
+ assert_equal(1, inner.value)
+ enddef
+
+ Test_assign_to_nested_typed_member()
+ END
+ v9.CheckSourceFailure(lines, 'E46: Cannot change read-only variable "value"')
+
+ # Assignment where target item is read only script level
+ lines =<< trim END
+ vim9script
+
+ class Inner
+ this.value: number = 0
+ endclass
+
+ class Outer
+ this.inner: Inner
+ endclass
+
+ def F(outer: Outer)
+ outer.inner.value = 1
+ enddef
+
+ var script_inner = Inner.new(0)
+ var script_outer = Outer.new(script_inner)
+ script_outer.inner.value = 1
+ assert_equal(1, script_inner.value)
+ END
+ v9.CheckSourceFailure(lines, 'E1335: Member is not writable: value')
enddef

def Test_assignment_with_operator()
diff --git a/src/version.c b/src/version.c
index ec6cce308..5abc4f733 100644
--- a/src/version.c
+++ b/src/version.c
@@ -699,6 +699,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 1920,
/**/
1919,
/**/