patch 8.2.1685: Vim9: cannot declare a constant value
Problem: Vim9: cannot declare a constant value.
Solution: Introduce ":const!".
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 6358181..904ee63 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -828,10 +828,50 @@
let lines =<< trim END
const list = [1, 2, 3]
list[0] = 4
+ list->assert_equal([4, 2, 3])
+ const! other = [5, 6, 7]
+ other->assert_equal([5, 6, 7])
END
CheckDefAndScriptSuccess(lines)
enddef
+def Test_const_bang()
+ let lines =<< trim END
+ const! var = 234
+ var = 99
+ END
+ CheckDefExecFailure(lines, 'E1018:', 2)
+ CheckScriptFailure(['vim9script'] + lines, 'E46:', 3)
+
+ lines =<< trim END
+ const! ll = [2, 3, 4]
+ ll[0] = 99
+ END
+ CheckDefExecFailure(lines, 'E1119:', 2)
+ CheckScriptFailure(['vim9script'] + lines, 'E741:', 3)
+
+ lines =<< trim END
+ const! ll = [2, 3, 4]
+ ll[3] = 99
+ END
+ CheckDefExecFailure(lines, 'E1118:', 2)
+ CheckScriptFailure(['vim9script'] + lines, 'E684:', 3)
+
+ lines =<< trim END
+ const! dd = #{one: 1, two: 2}
+ dd["one"] = 99
+ END
+ CheckDefExecFailure(lines, 'E1121:', 2)
+ CheckScriptFailure(['vim9script'] + lines, 'E741:', 3)
+
+ lines =<< trim END
+ const! dd = #{one: 1, two: 2}
+ dd["three"] = 99
+ END
+ CheckDefExecFailure(lines, 'E1120:')
+ CheckScriptFailure(['vim9script'] + lines, 'E741:', 3)
+enddef
+
def Test_range_no_colon()
CheckDefFailure(['%s/a/b/'], 'E1050:')
CheckDefFailure(['+ s/a/b/'], 'E1050:')