Re:From Node.js to Go
by Manishearth on Sunday February 01, 2015 @09:11PM
(#8982451)
`throw` in Java's exception handling also prematurely exits a function. So?
While `try!()` is a macro and not a core language feature, most of the macros in the standard library can be treated as such. So a Rust programmer will know that `try!()` can return, just like a Java programmer knows that `throw` returns early.
Besides, macros are syntactically distinguishable in Rust. When you see that exclamation mark, you have to rememeber that it's a macro and might be doing arbitrary compile time things along with arbitrary token tree expansion.
While `try!()` is a macro and not a core language feature, most of the macros in the standard library can be treated as such. So a Rust programmer will know that `try!()` can return, just like a Java programmer knows that `throw` returns early.
Besides, macros are syntactically distinguishable in Rust. When you see that exclamation mark, you have to rememeber that it's a macro and might be doing arbitrary compile time things along with arbitrary token tree expansion.