How to implement try-catch block in racket?-CodePudding

I try to write a try-catch block in racket, from the boilerplate provided

It says syntax error, but I really cannot see any issues. The code is from the official racket website. My goal is to write a simple try-catch block in racket, presumably using the imported library.

CodePudding user response：

You're requiring try-catch-match library, but your example comes from try-catch library. These two are different and if you use the correct one, the example code will work:

#lang racket
(require try-catch)

(try [(displayln "body")
        (raise 'boom)]
       [catch (string? (printf "caught a string\n"))
              (symbol? (printf "caught a symbol\n"))])