[Bug tapsets/17741] try-catch statement as a tapset function

[jistone at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17741

Josh Stone <jistone at redhat dot com> changed:

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                 CC|                            |jistone at redhat dot com

--- Comment #1 from Josh Stone <jistone at redhat dot com> ---
Note that both arguments will be evaluated *before* the function is called, so
if the first throws, your try_catch() won't even get a chance to catch it.  You
would need lambdas to let the function wrap a try-catch around evaluation.

A macro @try_catch can almost fake this, but since try-catch is a statement,
not an expression, it can't have a value.  And we don't have anything like
({...}) expressions to wrap up statements as expressions.

How about @try_assign(part_1, "k:".modname(addr()), sprintf("k:%p",addr())) ? 
This would expand exactly like your "wordy" example.

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