fish-shell/tests/expansion.in

# Test expansion of variables

function show --description 'Prints argument count followed by arguments'
    echo (count $argv) $argv
end

set -l foo
show "$foo"
show $foo
show "prefix$foo"
show prefix$foo

show "$$foo"
show $$foo
show "prefix$$foo"
show prefix$$foo

set -l foo ''
show "$foo"
show $foo
show "prefix$foo"
show prefix$foo

show "$$foo"
show $$foo
show "prefix$$foo"
show prefix$$foo

set -l foo bar
set -l bar
show "$$foo"
show $$foo
show "prefix$$foo"
show prefix$$foo

set -l bar baz
show "$$foo"
show $$foo
show "prefix$$foo"
show prefix$$foo

set -l bar baz quux
show "$$foo"
show $$foo
show "prefix$$foo"
show prefix$$foo

set -l foo bar fooer fooest
set -l fooer
set -l fooest
show "$$foo"
show $$foo
show "prefix$$foo"
show prefix$$foo

set -l fooer ''
show $$foo
show prefix$$foo

set -l foo bar '' fooest
show "$$foo"
show $$foo
show "prefix$$foo"
show prefix$$foo

set -l foo
show "$foo[1]"
show $foo[1]
show "$foo[-1]"
show $foo[-1]
show "$foo[2]"
show $foo[2]
show "$foo[1 2]"
show $foo[1 2]
show "$foo[2 1]"
show $foo[2 1]

echo "$foo[d]"
echo $foo[d]

echo ()[1]
echo ()[d]