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use read_token::ReadToken;
use range::Range;
use std::sync::Arc;
use super::{
ParseResult,
};
use {
DebugId,
MetaData,
ParseError,
};
use tokenizer::{ read_data, TokenizerState };
#[derive(Clone, Debug, PartialEq)]
pub struct UntilAnyOrWhitespace {
pub any_characters: Arc<String>,
pub optional: bool,
pub property: Option<Arc<String>>,
pub debug_id: DebugId,
}
impl UntilAnyOrWhitespace {
pub fn parse(
&self,
tokens: &mut Vec<Range<MetaData>>,
state: &TokenizerState,
read_token: &ReadToken
) -> ParseResult<TokenizerState> {
let (range, _) = read_token.until_any_or_whitespace(
&self.any_characters);
if range.length == 0 && !self.optional {
Err(range.wrap(ParseError::ExpectedSomething(self.debug_id)))
} else {
if let Some(ref property) = self.property {
let text = read_token.raw_string(range.length);
Ok((range, read_data(
tokens,
range.wrap(
MetaData::String(property.clone(), Arc::new(text))),
state
), None))
} else {
Ok((range, state.clone(), None))
}
}
}
}
#[cfg(test)]
mod tests {
use all::*;
use all::tokenizer::*;
use meta_rules::UntilAnyOrWhitespace;
use range::Range;
use read_token::ReadToken;
use std::sync::Arc;
#[test]
fn required() {
let text = "fn ()";
let mut tokenizer = vec![];
let s = TokenizerState::new();
let name = UntilAnyOrWhitespace {
debug_id: 0,
any_characters: Arc::new("(".into()),
optional: false,
property: None
};
let res = name.parse(&mut tokenizer, &s,
&ReadToken::new(&text[3..], 3));
assert_eq!(res, Err(Range::new(3, 0).wrap(
ParseError::ExpectedSomething(0))));
}
#[test]
fn successful() {
let text = "fn foo()";
let mut tokens = vec![];
let s = TokenizerState::new();
let function_name: Arc<String> = Arc::new("function_name".into());
let name = UntilAnyOrWhitespace {
debug_id: 0,
any_characters: Arc::new("(".into()),
optional: false,
property: Some(function_name.clone())
};
let res = name.parse(&mut tokens, &s, &ReadToken::new(&text[3..], 3));
assert_eq!(res, Ok((Range::new(3, 3), TokenizerState(1), None)));
assert_eq!(tokens.len(), 1);
assert_eq!(&tokens[0].data,
&MetaData::String(function_name.clone(), Arc::new("foo".into())));
}
}