hush: add support for ${var/pattern/repl}, conditional on bash compat

function                                             old     new   delta
expand_vars_to_list                                 2386    2833    +447
expand_string_to_string                               69     110     +41
parse_dollar                                         681     721     +40
hush_main                                            963     945     -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 528/-18)           Total: 510 bytes

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/shell/hush_test/hush-vars/var_bash5.tests b/shell/hush_test/hush-vars/var_bash5.tests
new file mode 100755
index 000000000..7f482a554
--- /dev/null
+++ b/shell/hush_test/hush-vars/var_bash5.tests
@@ -0,0 +1,11 @@
+# This testcase checks whether slashes in ${v/a/b} are parsed before
+# or after expansions
+
+v='a/b/c'
+s='b/c'
+r='e/f'
+echo "${v/$s}"
+echo "${v/$s/d}"
+echo "${v/$s/$r}"
+
+echo Done: $?