mirror of
git://git.code.sf.net/p/zsh/code
synced 2024-11-19 13:33:52 +01:00
42 lines
1.2 KiB
Plaintext
42 lines
1.2 KiB
Plaintext
# Catch an exception. Returns 0 if the exception in question was caught.
|
|
# The first argument gives the exception to catch, which may be a
|
|
# pattern.
|
|
# This must be within an always-block. A typical set of handlers looks
|
|
# like:
|
|
# {
|
|
# # try block; something here throws exceptions
|
|
# } always {
|
|
# if catch MyExcept; then
|
|
# # Handler code goes here.
|
|
# print Handling exception MyExcept
|
|
# elif catch *; then
|
|
# # This is the way to implement a catch-all.
|
|
# print Handling any other exception
|
|
# fi
|
|
# }
|
|
# As with other languages, exceptions do not need to be handled
|
|
# within an always block and may propagate to a handler further up the
|
|
# call chain.
|
|
#
|
|
# It is possible to throw an exception from within the handler by
|
|
# using "throw".
|
|
#
|
|
# The shell variable $CAUGHT is set to the last exception caught,
|
|
# which is useful if the argument to "catch" was a pattern.
|
|
#
|
|
# Use "function" keyword in case catch is already an alias.
|
|
function catch {
|
|
if [[ $TRY_BLOCK_ERROR -gt 0 && $EXCEPTION = ${~1} ]]; then
|
|
(( TRY_BLOCK_ERROR = 0 ))
|
|
CAUGHT="$EXCEPTION"
|
|
unset EXCEPTION
|
|
return 0
|
|
fi
|
|
|
|
return 1
|
|
}
|
|
# Never use globbing with "catch".
|
|
alias catch="noglob catch"
|
|
|
|
catch "$@"
|