64981b4c8
Denys Vlasenko
2020-11-01
Subject
hush: document bugs in [[ =~ ]] comparison
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shell/hush_test/hush-bugs/strops5_bug.right +2 -0shell/hush_test/hush-bugs/strops5_bug.tests +10 -0shell/hush_test/hush-test2/strops5.right +3 -0shell/hush_test/hush-test2/strops5.tests +13 -0
shell/hush_test/hush-bugs/strops5_bug.right+2 -0
| @@ -0,0 +1,2 @@ | |
| + | 4:no:1 |
| + | 5:YES:0 |
shell/hush_test/hush-bugs/strops5_bug.tests+10 -0
| @@ -0,0 +1,10 @@ | |
| + | v='*.z' |
| + | |
| + | # Buggy: |
| + | # the problem is that expansion rules of LHS and RHS of ~= |
| + | # should not be the same: in RHS, "$v" and "*" should escape metas |
| + | # (currently "$v" does not), |
| + | # but in LHS, they should _not_ do that |
| + | # (currently "*" does). Thus these cases fail: |
| + | [[ a.z == "$v" ]]; echo 4:no:$? # BUG: "$v" expands to *.z |
| + | [[ "*".z == ?.z ]]; echo 5:YES:$? # BUG: "*" expands to \* |
shell/hush_test/hush-test2/strops5.right+3 -0
| @@ -0,0 +1,3 @@ | |
| + | 1:YES:0 |
| + | 2:no:1 |
| + | 3:YES:0 |
shell/hush_test/hush-test2/strops5.tests+13 -0
| @@ -0,0 +1,13 @@ | |
| + | v='*.z' |
| + | [[ a.z = *.z ]]; echo 1:YES:$? |
| + | [[ a.z = "*".z ]]; echo 2:no:$? |
| + | [[ a.z == $v ]]; echo 3:YES:$? |
| + | |
| + | # Buggy: |
| + | # the problem is that expansion rules of LHS and RHS of ~= |
| + | # should not be the same: in RHS, "$v" and "*" should escape metas |
| + | # (currently "$v" does not), |
| + | # but in LHS, they should _not_ do that |
| + | # (currently "*" does). Thus these cases fail: |
| + | #[[ a.z == "$v" ]]; echo 4:no:$? # BUG: "$v" expands to *.z |
| + | #[[ "*".z == ?.z ]]; echo 5:YES:$? # BUG: "*" expands to \* |