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patch 8.2.2305: Vim9: "++var" and "--var" are silently accepted

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Problem:    Vim9: "++var" and "--var" are silently accepted.
Solution:   Give an error message.
This commit is contained in:
Bram Moolenaar
2021-01-05 22:08:20 +01:00
parent 0acbf5ae66
commit b23279d7a2
5 changed files with 75 additions and 23 deletions
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65
src/testdir/test_vim9_expr.vim
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@@ -2516,11 +2516,8 @@ def Test_expr7_parens()
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 @@ enddef
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 @@ def Test_expr7_call()
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)