1 #
2 # Corner cases in var sub. Maybe rename this file.
3
4 #### Bad var sub
5 echo ${a&}
6 ## stdout-json: ""
7 ## status: 2
8 ## OK bash/mksh status: 1
9
10 #### Braced block inside ${}
11 # NOTE: This bug was in bash 4.3 but fixed in bash 4.4.
12 echo ${foo:-$({ ls /bin/ls; })}
13 ## stdout: /bin/ls
14
15 #### Nested ${}
16 bar=ZZ
17 echo ${foo:-${bar}}
18 ## stdout: ZZ
19
20 #### Filename redirect with "$@"
21 # bash - ambiguous redirect -- yeah I want this error
22 # - But I want it at PARSE time? So is there a special DollarAtPart?
23 # MultipleArgsPart?
24 # mksh - tries to create '_tmp/var-sub1 _tmp/var-sub2'
25 # dash - tries to create '_tmp/var-sub1 _tmp/var-sub2'
26 fun() {
27 echo hi > "$@"
28 }
29 fun _tmp/var-sub1 _tmp/var-sub2
30 ## status: 1
31 ## OK dash status: 2
32
33 #### Descriptor redirect to bad "$@"
34 # All of them give errors:
35 # dash - bad fd number, parse error?
36 # bash - ambiguous redirect
37 # mksh - illegal file descriptor name
38 set -- '2 3' 'c d'
39 echo hi 1>& "$@"
40 ## status: 1
41 ## OK dash status: 2
42
43 #### Here doc with bad "$@" delimiter
44 # bash - syntax error
45 # dash - syntax error: end of file unexpected
46 # mksh - runtime error: here document unclosed
47 #
48 # What I want is syntax error: bad delimiter!
49 #
50 # This means that "$@" should be part of the parse tree then? Anything that
51 # involves more than one token.
52 fun() {
53 cat << "$@"
54 hi
55 1 2
56 }
57 fun 1 2
58 ## status: 2
59 ## stdout-json: ""
60 ## OK mksh status: 1