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create Chars struct instead of using Peekable

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This commit is contained in:
Andy Grove 2018-09-02 18:59:30 -06:00
parent 7ff4133327
commit 69a140a820
5 changed files with 64 additions and 59 deletions
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52
examples/acme_parser.rs
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@ -35,40 +35,30 @@ impl SQLTokenizer<AcmeToken> for AcmeTokenizer {
unimplemented!()
}
fn peek_token(&mut self) -> Result<Option<SQLToken<AcmeToken>>, TokenizerError<AcmeToken>> {
fn next_token(&mut self) -> Result<Option<SQLToken<AcmeToken>>, TokenizerError> {
// let mut arc = self.ansi_tokenizer.lock().unwrap();
// match arc.peek_char() {
// Some(&ch) => match ch {
// '!' => {
// arc.next_char(); // consume the first `!`
// match arc.peek_char() {
// Some(&ch) => match ch {
// '!' => {
// arc.next_char(); // consume the second `!`
// Ok(Some(SQLToken::Custom(AcmeToken::Factorial)))
// },
// _ => Err(TokenizerError::UnexpectedChar(ch,Position::new(0,0)))
// },
// None => Ok(Some(SQLToken::Not))
// }
// }
// _ => arc.next_token()
// }
// _ => arc.next_token()
// }
unimplemented!()
}
fn next_token(&mut self) -> Result<Option<SQLToken<AcmeToken>>, TokenizerError<AcmeToken>> {
let mut arc = self.ansi_tokenizer.lock().unwrap();
match arc.peek_char() {
Some(&ch) => match ch {
'!' => {
arc.next_char(); // consume the first `!`
match arc.peek_char() {
Some(&ch) => match ch {
'!' => {
arc.next_char(); // consume the second `!`
Ok(Some(SQLToken::Custom(AcmeToken::Factorial)))
},
_ => Err(TokenizerError::UnexpectedChar(ch,Position::new(0,0)))
},
None => Ok(Some(SQLToken::Not))
}
}
_ => arc.next_token()
}
_ => arc.next_token()
}
}
fn peek_char(&mut self) -> Option<&char> {
unimplemented!()
}
fn next_char(&mut self) -> Option<&char> {
unimplemented!()
}
}
struct AcmeParser {