From abd6b70c72dc6426752ff41f09160b839e5c449e Mon Sep 17 00:00:00 2001 From: Taylor Yu Date: Fri, 25 Jun 2021 16:52:10 -0500 Subject: feat: add advanced_errs2 New exercise to demonstrate traits that make it easier for other code to consume our custom error types. --- info.toml | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'info.toml') diff --git a/info.toml b/info.toml index 8e24b7d..1b8c65d 100644 --- a/info.toml +++ b/info.toml @@ -994,3 +994,35 @@ 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. """ + +[[exercises]] +name = "advanced_errs2" +path = "exercises/advanced_errors/advanced_errs2.rs" +mode = "test" +hint = """ +This exercise demonstrates a few traits that are useful for custom error +types to implement. These traits make it easier for other code to consume +the custom error type. + +Follow the steps in the comment near the top of the file. You will have to +supply a missing trait implementation, and complete a few incomplete ones. + +You may find these pages to be helpful references: +https://doc.rust-lang.org/stable/rust-by-example/error/multiple_error_types/define_error_type.html +https://doc.rust-lang.org/stable/rust-by-example/error/multiple_error_types/boxing_errors.html +https://doc.rust-lang.org/stable/rust-by-example/error/multiple_error_types/wrap_error.html + +Hint: What trait must our error type have for `main()` to return the return +type that it returns? + +Another hint: It's not necessary to implement any methods inside the missing +trait. (Some methods have default implementations that are supplied by the +trait.) + +Another hint: Consult the tests to determine which error variants (and which +error message text) to produce for certain error conditions. + +Challenge: There is one test that is marked `#[ignore]`. Can you supply the +missing code that will make it pass? You may want to consult the standard +library documentation for a certain trait for more hints. +""" -- cgit v1.2.3