From 882d535ba8628d5e0b37e8664b3e2f26260b2671 Mon Sep 17 00:00:00 2001 From: Taylor Yu Date: Wed, 9 Jun 2021 23:26:10 -0500 Subject: feat: add advanced_errs1 New section and exercise to demonstrate the `From` trait for errors and its usefulness with the `?` operator. --- info.toml | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'info.toml') diff --git a/info.toml b/info.toml index f5af884..8e24b7d 100644 --- a/info.toml +++ b/info.toml @@ -974,3 +974,23 @@ path = "exercises/conversions/as_ref_mut.rs" mode = "test" hint = """ Add AsRef as a trait bound to the functions.""" + +# ADVANCED ERRORS + +[[exercises]] +name = "advanced_errs1" +path = "exercises/advanced_errors/advanced_errs1.rs" +mode = "test" +hint = """ +This exercise uses an updated version of the code in errors6. The parsing +code is now in an implementation of the `FromStr` trait. Note that the +parsing code uses `?` directly, without any calls to `map_err()`. There is +one partial implementation of the `From` trait example that you should +complete. + +Details: The `?` operator calls `From::from()` on the error type to convert +it to the error type of the return type of the surrounding function. + +Hint: You will need to write another implementation of `From` that has a +different input type. +""" -- cgit v1.2.3