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27 lines
689 B
Rust
27 lines
689 B
Rust
use ropey::RopeSlice;
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pub trait RopeSliceExt: Sized {
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fn ends_with(self, text: &str) -> bool;
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fn starts_with(self, text: &str) -> bool;
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}
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impl RopeSliceExt for RopeSlice<'_> {
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fn ends_with(self, text: &str) -> bool {
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let len = self.len_bytes();
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if len < text.len() {
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return false;
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}
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self.get_byte_slice(len - text.len()..)
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.map_or(false, |end| end == text)
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}
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fn starts_with(self, text: &str) -> bool {
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let len = self.len_bytes();
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if len < text.len() {
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return false;
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}
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self.get_byte_slice(..len - text.len())
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.map_or(false, |start| start == text)
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}
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}
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