[−][src]Crate try_or_wrap_s
This crate provides a macro similar to the old try!
macro, or to the ?
, except it wraps
the error in something else.
This is useful if you want to use a ?
for easily returning say, invalid input errors,
but you can't do so because you have an additional Result
level for handling internal errors of a different nature.
This macro allows you to do so:
ⓘThis example is not tested
fn foo(input: Input) -> Result<Result<FinalOutput, InvalidInputError>, DatabaseError> { let validated_input: ValidatedInput = try_or_wrap!(validate_input_with_database(input)?, Ok); Ok(Ok(do_stuff_with_validated_input(validated_input)?)) } fn validate_input_with_database(input: Input) -> Result<Result<ValidatedInput, InvalidInputError>, DatabaseError>;
Macros
try_or_wrap | Helper macro to wrap |
try_or_wrap_opt | Same as |