44 lines
884 B
Rust
44 lines
884 B
Rust
use crate::err::ProcessingResult;
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use crate::ErrorType;
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use crate::proc::Processor;
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#[derive(Copy, Clone)]
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pub struct ProcessorRange {
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pub(super) start: usize,
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pub(super) end: usize,
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}
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impl ProcessorRange {
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pub fn len(&self) -> usize {
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self.end - self.start
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}
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pub fn empty(&self) -> bool {
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self.start >= self.end
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}
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pub fn nonempty(&self) -> bool {
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!self.empty()
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}
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pub fn first(&self, proc: &Processor) -> Option<u8> {
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if self.empty() {
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None
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} else {
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Some(proc.code[self.start])
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}
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}
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pub fn require(&self, reason: &'static str) -> ProcessingResult<Self> {
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if self.empty() {
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Err(ErrorType::NotFound(reason))
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} else {
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Ok(*self)
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}
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}
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pub fn expect(&self) -> () {
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debug_assert!(self.nonempty());
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}
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}
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