INPUT=ABC; INPUT=${(S)INPUT//#%((#b)(*))/°match°}; print $match
#no output

# Try to quote #
INPUT=ABC; INPUT=${(S)INPUT//\#\%((#b)(*))/°match°}; print $match
#no output

# Anchor with (#s)/(#e) instead:
INPUT=ABC; INPUT=${(S)INPUT//(#s)((#b)(*))(#e)/°match°}; print $match
#ouput correct:
ABC

# No S-flag
INPUT=ABC; INPUT=${INPUT//#%((#b)(*))/°match°}; print $match
#output correct
ABC

BTW, what were the rules of (#b) flag activity (or (#B))? It was something
about "till the end of the parens".



-- 
Best regards,
Sebastian Gniazdowski