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51945: assorted documentation improvements, bug fixes, and new test

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1) Document the behavior of "typeset -n existing_var" (via Jun T. comment)
2) Prohibit "typeset -nm pattern" because, well, it's insane.  Add test.
3) Improve doc for ${(!)ref} including ${{t!)ref} (Jun T.)
4) Fix doc for how-to unset of a named ref (Jun T.)
5) Allow "typeset +r -n ref" and "typeset +r +n ref" (Jun T.)
6) Fix "typeset -r -n ref=param" to create readonly references
7) Avoid accidental removal of PM_UNSET flag (Jun T.) and update test
8) Fix "typeset -gn ref=value" and add a test for it
9) Add tests for read-only reference behavior
10) Fix infinite recursion when resolving scope of an unset local
named reference, add test.
This commit is contained in:
Bart Schaefer 2023-07-26 20:15:21 -07:00
parent 5ff23c2c6d
commit baa19d2a85
7 changed files with 132 additions and 18 deletions
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70
Test/K01nameref.ztst
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@ -515,7 +515,7 @@ F:Same test, should part 5 output look like this?
>ptr1=val
>ptr2=
>typeset -n ptr1=ptr2
>typeset -n ptr2=''
>typeset -n ptr2
>typeset ptr2=val
if zmodload zsh/parameter; then
@ -694,4 +694,72 @@ F:Checking for a bug in zmodload that affects later tests
F:runs in `setopt noexec` so $(...) returns nothing
*?*bad math expression: empty string
unset -n ref
typeset -n ref=GLOBAL
() {
typeset -gn ref=RESET
}
typeset -p ref
0:reset global reference within function
>typeset -n ref=RESET
unset -n ref
typeset -rn ref=RO
typeset -p ref
(typeset -n ref=RW)
print status: $? expected: 1
typeset +r -n ref
typeset -p ref
typeset -r +n ref
typeset -p ref
(typeset -rn ref)
print status: $? expected: 1
typeset +r -n ref=RW # Assignment occurs after type change,
typeset -p ref RO # so RO=RW here. Potentially confusing.
typeset -r -n ref=RX # No type change, so referent changes ...
typeset -p ref RO # ... and previous refererent does not.
typeset +rn ref=RW # Here ref=RW, again type changed first.
typeset -p ref
0:add and remove readonly attribute with references
>typeset -rn ref=RO
*?*: ref: read-only reference
>status: 1 expected: 1
>typeset -n ref=RO
>typeset -r ref=RO
*?*: ref: read-only variable
>status: 1 expected: 1
>typeset -n ref=RO
>typeset -g RO=RW
>typeset -rn ref=RX
>typeset -g RO=RW
>typeset ref=RW
() {
typeset -n r1 r2=
typeset -p r1 r2
print -- ${(!)r1-unset}
print -- ${+r1}
typeset -p r1
}
0:unset nameref remains unset when resolved
F:relies on global TYPESET_TO_UNSET in %prep
>typeset -n r1
>typeset -n r2=''
>unset
>0
>typeset -n r1
bar=xx
typeset -n foo=bar
() { typeset -n foo; foo=zz; foo=zz; print $bar $zz }
() { typeset -n foo; foo=zz; local zz; foo=zz; print $bar $zz }
0:regression: local nameref may not in-scope a global parameter
F:previously this could create an infinite recursion and crash
>xx
>xx zz
typeset -nm foo=bar
1:create nameref by pattern match not allowed
*?*typeset:1: invalid reference
%clean