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patch 8.2.3137: Vim9: no error when a line only has a variable name

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Problem:    Vim9: no error when a line only has a variable name.
Solution:   Give an error when an expression is evaluated without an effect.
            (closes #8538)
This commit is contained in:
Bram Moolenaar
2021-07-10 19:42:03 +02:00
parent fe3418abe0
commit c323527d67
7 changed files with 76 additions and 15 deletions
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2
src/testdir/test_vim9_expr.vim
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@@ -647,7 +647,7 @@ def Test_expr4_equal()
CheckDefFailure(["var x = 'a' == "], 'E1097:', 3)
CheckScriptFailure(['vim9script', "var x = 'a' == "], 'E15:', 2)
CheckDefExecAndScriptFailure2(['var items: any', 'eval 1', 'eval 2', 'if items == []', 'endif'], 'E691:', 'E1072:', 4)
CheckDefExecAndScriptFailure2(['var items: any', 'eval 1 + 1', 'eval 2 + 2', 'if items == []', 'endif'], 'E691:', 'E1072:', 4)
CheckDefExecAndScriptFailure(['var x: any = "a"', 'echo x == true'], 'E1072: Cannot compare string with bool', 2)
CheckDefExecAndScriptFailure(["var x: any = true", 'echo x == ""'], 'E1072: Cannot compare bool with string', 2)