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| </pre><pre class="rust"><code><span class="kw">use </span>std::cmp::Ordering; |
| |
| <span class="kw">use </span>serde::{Deserialize, Serialize}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::tokenizer::{Token, TokenStream}; |
| |
| <span class="doccomment">/// Struct representing pre-tokenized text |
| </span><span class="attribute">#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq)] |
| </span><span class="kw">pub struct </span>PreTokenizedString { |
| <span class="doccomment">/// Original text |
| </span><span class="kw">pub </span>text: String, |
| <span class="doccomment">/// Tokens derived from the text |
| </span><span class="kw">pub </span>tokens: Vec<Token>, |
| } |
| |
| <span class="kw">impl </span>Ord <span class="kw">for </span>PreTokenizedString { |
| <span class="kw">fn </span>cmp(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>) -> Ordering { |
| <span class="self">self</span>.text.cmp(<span class="kw-2">&</span>other.text) |
| } |
| } |
| |
| <span class="kw">impl </span>PartialOrd <span class="kw">for </span>PreTokenizedString { |
| <span class="kw">fn </span>partial_cmp(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>) -> <span class="prelude-ty">Option</span><Ordering> { |
| <span class="prelude-val">Some</span>(<span class="self">self</span>.cmp(other)) |
| } |
| } |
| |
| <span class="doccomment">/// [`TokenStream`] implementation which wraps [`PreTokenizedString`] |
| </span><span class="kw">pub struct </span>PreTokenizedStream { |
| tokenized_string: PreTokenizedString, |
| current_token: i64, |
| } |
| |
| <span class="kw">impl </span>From<PreTokenizedString> <span class="kw">for </span>PreTokenizedStream { |
| <span class="kw">fn </span>from(s: PreTokenizedString) -> PreTokenizedStream { |
| PreTokenizedStream { |
| tokenized_string: s, |
| current_token: -<span class="number">1</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>TokenStream <span class="kw">for </span>PreTokenizedStream { |
| <span class="kw">fn </span>advance(<span class="kw-2">&mut </span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.current_token += <span class="number">1</span>; |
| <span class="self">self</span>.current_token < <span class="self">self</span>.tokenized_string.tokens.len() <span class="kw">as </span>i64 |
| } |
| |
| <span class="kw">fn </span>token(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>Token { |
| <span class="macro">assert!</span>( |
| <span class="self">self</span>.current_token >= <span class="number">0</span>, |
| <span class="string">"TokenStream not initialized. You should call advance() at least once." |
| </span>); |
| <span class="kw-2">&</span><span class="self">self</span>.tokenized_string.tokens[<span class="self">self</span>.current_token <span class="kw">as </span>usize] |
| } |
| |
| <span class="kw">fn </span>token_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>Token { |
| <span class="macro">assert!</span>( |
| <span class="self">self</span>.current_token >= <span class="number">0</span>, |
| <span class="string">"TokenStream not initialized. You should call advance() at least once." |
| </span>); |
| <span class="kw-2">&mut </span><span class="self">self</span>.tokenized_string.tokens[<span class="self">self</span>.current_token <span class="kw">as </span>usize] |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::tokenizer::Token; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_tokenized_stream() { |
| <span class="kw">let </span>tok_text = PreTokenizedString { |
| text: String::from(<span class="string">"A a"</span>), |
| tokens: <span class="macro">vec!</span>[ |
| Token { |
| offset_from: <span class="number">0</span>, |
| offset_to: <span class="number">1</span>, |
| position: <span class="number">0</span>, |
| text: String::from(<span class="string">"A"</span>), |
| position_length: <span class="number">1</span>, |
| }, |
| Token { |
| offset_from: <span class="number">2</span>, |
| offset_to: <span class="number">3</span>, |
| position: <span class="number">1</span>, |
| text: String::from(<span class="string">"a"</span>), |
| position_length: <span class="number">1</span>, |
| }, |
| ], |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>token_stream = PreTokenizedStream::from(tok_text.clone()); |
| |
| <span class="kw">for </span>expected_token <span class="kw">in </span>tok_text.tokens { |
| <span class="macro">assert!</span>(token_stream.advance()); |
| <span class="macro">assert_eq!</span>(token_stream.token(), <span class="kw-2">&</span>expected_token); |
| } |
| <span class="macro">assert!</span>(!token_stream.advance()); |
| } |
| } |
| </code></pre></div> |
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