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| author | Yegappan Lakshmanan <yegappan@yahoo.com> | 2022-05-22 19:13:49 +0100 |
|---|---|---|
| committer | Bram Moolenaar <Bram@vim.org> | 2022-05-22 19:13:49 +0100 |
| commit | a061f34191712df7dde7716705fe0ec074e9758e (patch) | |
| tree | f8a3bf02c826aeb748d12bfa74ead3e9f74573a2 /src/testdir/test_expr.vim | |
| parent | 9b2edfd3bf2f14a1faaee9b62930598a2e77a798 (diff) | |
patch 8.2.5003: cannot do bitwise shiftsv8.2.5003
Problem: Cannot do bitwise shifts.
Solution: Add the >> and << operators. (Yegappan Lakshmanan, closes #8457)
Diffstat (limited to 'src/testdir/test_expr.vim')
| -rw-r--r-- | src/testdir/test_expr.vim | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/testdir/test_expr.vim b/src/testdir/test_expr.vim index 0b6b57e4a2..24daeb6655 100644 --- a/src/testdir/test_expr.vim +++ b/src/testdir/test_expr.vim @@ -946,4 +946,66 @@ func Test_string_interp() call v9.CheckDefAndScriptSuccess(lines) endfunc +" Test for bitwise left and right shift (<< and >>) +func Test_bitwise_shift() + let lines =<< trim END + call assert_equal(16, 1 << 4) + call assert_equal(2, 16 >> 3) + call assert_equal(0, 0 << 2) + call assert_equal(0, 0 >> 4) + call assert_equal(3, 3 << 0) + call assert_equal(3, 3 >> 0) + call assert_equal(0, 0 >> 4) + call assert_equal(0, 999999 >> 100) + call assert_equal(0, 999999 << 100) + VAR a = 8 + VAR b = 2 + call assert_equal(2, a >> b) + call assert_equal(32, a << b) + #" operator precedence + call assert_equal(48, 1 + 2 << 5 - 1) + call assert_equal(3, 8 + 4 >> 4 - 2) + call assert_true(1 << 2 < 1 << 3) + call assert_true(1 << 4 > 1 << 3) + VAR val = 0 + for i in range(0, v:numbersize - 2) + LET val = or(val, 1 << i) + endfor + call assert_equal(v:numbermax, val) + LET val = v:numbermax + for i in range(0, v:numbersize - 2) + LET val = and(val, invert(1 << i)) + endfor + call assert_equal(0, val) + #" multiple operators + call assert_equal(16, 1 << 2 << 2) + call assert_equal(4, 64 >> 2 >> 2) + call assert_true(1 << 2 << 2 == 256 >> 2 >> 2) + END + call v9.CheckLegacyAndVim9Success(lines) + + call v9.CheckLegacyAndVim9Failure(['VAR v = 2 << -1'], ['E1283:', 'E1283:', 'E1283:']) + call v9.CheckLegacyAndVim9Failure(['VAR a = 2', 'VAR b = -1', 'VAR v = a << b'], ['E1283:', 'E1283:', 'E1283:']) + call v9.CheckLegacyAndVim9Failure(['VAR v = "8" >> 2'], ['E1282:', 'E1282:', 'E1282:']) + call v9.CheckLegacyAndVim9Failure(['VAR v = 1 << "2"'], ['E1282:', 'E1282:', 'E1282:']) + call v9.CheckLegacyAndVim9Failure(['VAR a = "8"', 'VAR b = 2', 'VAR v = a << b'], ['E1282:', 'E1012:', 'E1282:']) + call v9.CheckLegacyAndVim9Failure(['VAR a = 8', 'VAR b = "2"', 'VAR v = a >> b'], ['E1282:', 'E1012:', 'E1282:']) + call v9.CheckLegacyAndVim9Failure(['VAR v = ![] << 1'], ['E745:', 'E1012:', 'E1282:']) + call v9.CheckLegacyAndVim9Failure(['VAR v = 1 << ![]'], ['E745:', 'E1012:', 'E1282:']) + call v9.CheckLegacyAndVim9Failure(['VAR v = ![] >> 1'], ['E745:', 'E1012:', 'E1282:']) + call v9.CheckLegacyAndVim9Failure(['VAR v = 1 >> ![]'], ['E745:', 'E1012:', 'E1282:']) + call v9.CheckDefAndScriptFailure(['echo 1<< 2'], ['E1004:', 'E1004:']) + call v9.CheckDefAndScriptFailure(['echo 1 <<2'], ['E1004:', 'E1004:']) + call v9.CheckDefAndScriptFailure(['echo 1>> 2'], ['E1004:', 'E1004:']) + call v9.CheckDefAndScriptFailure(['echo 1 >>2'], ['E1004:', 'E1004:']) + + let lines =<< trim END + var a = 1 + << + 4 + assert_equal(16, a) + END + call v9.CheckDefAndScriptSuccess(lines) +endfunc + " vim: shiftwidth=2 sts=2 expandtab |