TryFrom implementation for ExceptionVector #506
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Let's use a simple error type that wraps the invalid u8. Feel free to use x86_64/src/instructions/tlb.rs Lines 78 to 88 in 323d46c |
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Made Error as enum for more details |
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src/structures/idt.rs
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| impl fmt::Display for InvalidExceptionVectorNumber { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| match self { | ||
| InvalidExceptionVectorNumber::IsCoprocessorSegmentOverrun(exception_vector_number) => { | ||
| write!(f, "{exception_vector_number} cannot be a valid exception vector number because the Coprocessor Segment Overrun exception is handled as part of the General Protection Fault") | ||
| } | ||
| InvalidExceptionVectorNumber::Reserved(exception_vector_number) => { | ||
| write!(f, "{exception_vector_number} cannot be a valid exception vector number because it is reserved") | ||
| } | ||
| InvalidExceptionVectorNumber::NotException(exception_vector_number) => { | ||
| write!(f, "{exception_vector_number} cannot be a valid exception vector number because only the first 32 numbers can be exception numbers") | ||
| } | ||
| } | ||
| } | ||
| } |
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This is certainly a matter of opinion, but the error messages seem too lengthy to me. Let's just print "{} is not a valid exception vector" in all cases and let's also use a struct instead of an enum. It shouldn't be difficult for the user to figure out what went wrong in each case.
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There is currently no way to create an instance of idt::ExceptionVector having an interrupt number. At the same time it would be convenient for the user to use this enum to handle interrupts.
As for the implementation, I couldn't think of what type of error it should return.