37 lines
1.2 KiB
Rust
37 lines
1.2 KiB
Rust
use crate::PkmnError;
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use anyhow::Result;
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/// Extension trait for `Vec` and `[T]` to provide common helper methods.
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pub trait VecExt<T> {
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/// Get a mutable reference to an element in the vector, or return an error if the index is out of bounds.
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fn get_mut_res(&mut self, index: usize) -> Result<&mut T>;
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/// Get a reference to an element in the vector, or return an error if the index is out of bounds.
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fn get_res(&self, index: usize) -> Result<&T>;
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}
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impl<T> VecExt<T> for [T] {
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fn get_mut_res(&mut self, index: usize) -> Result<&mut T> {
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let len = self.len();
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self.get_mut(index)
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.ok_or(PkmnError::IndexOutOfBounds { index, len }.into())
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}
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fn get_res(&self, index: usize) -> Result<&T> {
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self.get(index)
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.ok_or(PkmnError::IndexOutOfBounds { index, len: self.len() }.into())
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}
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}
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impl<T> VecExt<T> for Vec<T> {
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fn get_mut_res(&mut self, index: usize) -> Result<&mut T> {
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let len = self.len();
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self.get_mut(index)
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.ok_or(PkmnError::IndexOutOfBounds { index, len }.into())
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}
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fn get_res(&self, index: usize) -> Result<&T> {
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self.get(index)
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.ok_or(PkmnError::IndexOutOfBounds { index, len: self.len() }.into())
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}
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}
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