patch 8.2.2305: Vim9: "++var" and "--var" are silently accepted
Problem: Vim9: "++var" and "--var" are silently accepted.
Solution: Give an error message.
diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index d835f04..ae5ca28 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -2516,11 +2516,8 @@
assert_equal(6, +6)
assert_equal(-6, -6)
- assert_equal(6, --6)
- assert_equal(6, -+-6)
- assert_equal(-6, ---6)
assert_equal(false, !-3)
- assert_equal(true, !+-+0)
+ assert_equal(true, !+0)
enddef
def Test_expr7_parens_vim9script()
@@ -2539,26 +2536,56 @@
def Test_expr7_negate_add()
assert_equal(-99, -99)
assert_equal(-99, - 99)
- assert_equal(99, --99)
- assert_equal(99, -- 99)
- assert_equal(99, - - 99)
assert_equal(99, +99)
- assert_equal(-99, -+99)
- assert_equal(-99, -+ 99)
- assert_equal(-99, - +99)
- assert_equal(-99, - + 99)
- assert_equal(-99, +-99)
- assert_equal(-99, + -99)
- assert_equal(-99, + - 99)
var nr = 88
assert_equal(-88, -nr)
assert_equal(-88, - nr)
- assert_equal(-88, - +nr)
- assert_equal(88, -- nr)
assert_equal(88, + nr)
- assert_equal(88, --+ nr)
- assert_equal(88, - - nr)
+
+ var lines =<< trim END
+ var n = 12
+ echo ++n
+ END
+ CheckDefAndScriptFailure(lines, 'E15:')
+ lines =<< trim END
+ var n = 12
+ echo --n
+ END
+ CheckDefAndScriptFailure(lines, 'E15:')
+ lines =<< trim END
+ var n = 12
+ echo +-n
+ END
+ CheckDefAndScriptFailure(lines, 'E15:')
+ lines =<< trim END
+ var n = 12
+ echo -+n
+ END
+ CheckDefAndScriptFailure(lines, 'E15:')
+ lines =<< trim END
+ var n = 12
+ echo - -n
+ END
+ CheckDefAndScriptFailure(lines, 'E15:')
+ lines =<< trim END
+ var n = 12
+ echo + +n
+ END
+ CheckDefAndScriptFailure(lines, 'E15:')
+
+ lines =<< trim END
+ var n = 12
+ :1
+ ++n
+ END
+ CheckDefAndScriptFailure(lines, 'E1050:')
+ lines =<< trim END
+ var n = 12
+ :1
+ --n
+ END
+ CheckDefAndScriptFailure(lines, 'E1050:')
enddef
def Echo(arg: any): string
@@ -2573,7 +2600,7 @@
var lines =<< trim END
assert_equal('yes', 'yes'->Echo())
assert_equal(true, !range(5)->empty())
- assert_equal([0, 1, 2], --3->range())
+ assert_equal([0, 1, 2], 3->range())
END
CheckDefAndScriptSuccess(lines)