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Last change
on this file since 3320 was 3320, checked in by Bruno Cornec, 9 years ago |
- Re-add (thanks git BTW) the 2.2.9 branch which had been destroyed in
the move to 3.0
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-
Property svn:executable
set to
*
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File size:
1.0 KB
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| 1 | # UNFIXED BUG: hush thinks that ; && || & have the same precedence.
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| 2 | # According to this doc, && || have higher precedence than ; &.
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| 3 | # See example below.
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| 4 | # Precedence of ; is not a problem in practice. Precedence of & is.
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| 5 | #
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| 6 | #http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html
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| 7 | #
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| 8 | #2.9.3 Lists
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| 9 | #
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| 10 | #An AND-OR list is a sequence of one or more pipelines separated by
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| 11 | #the operators "&&" and "||" .
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| 12 | #
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| 13 | #A list is a sequence of one or more AND-OR lists separated by the operators
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| 14 | #';' and '&' and optionally terminated by ';', '&', or <newline>.
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| 15 | #
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| 16 | #The operators "&&" and "||" shall have equal precedence and shall be
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| 17 | #evaluated with left associativity. For example, both of the following
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| 18 | #commands write solely bar to standard output:
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| 19 | #
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| 20 | # false && echo foo || echo bar
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| 21 | # true || echo foo && echo bar
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| 22 | #
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| 23 | #A ';' or <newline> terminator shall cause the preceding AND-OR list
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| 24 | #to be executed sequentially; an '&' shall cause asynchronous execution
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| 25 | #of the preceding AND-OR list.
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| 26 |
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| 27 | echo First && sleep 0.2 && echo Third &
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| 28 | sleep 0.1
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| 29 | echo Second
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| 30 | wait
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| 31 | echo Done
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