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use hemtt_tokens::{Symbol, Token};
use peekmore::PeekMoreIterator;
use crate::{
error::Error,
rapify::{Rapify, WriteExt},
Options,
};
use super::Parse;
#[derive(Debug, Clone, PartialEq, Eq)]
/// A string value
pub struct Str(pub String);
impl Parse for Str {
fn parse(
_options: &Options,
tokens: &mut PeekMoreIterator<impl Iterator<Item = Token>>,
from: &Token,
) -> Result<Self, Error>
where
Self: Sized,
{
if let Some(token) = tokens.next() {
if token.symbol() != &Symbol::DoubleQuote {
return Err(Error::UnexpectedToken {
token: Box::new(token),
expected: vec![Symbol::DoubleQuote],
});
}
} else {
return Err(Error::UnexpectedEOF {
token: Box::new(from.clone()),
});
}
let mut string = String::new();
'outer: loop {
if let Some(token) = tokens.peek() {
match token.symbol() {
Symbol::DoubleQuote => 'inner: loop {
tokens.next();
if let Some(token) = tokens.peek() {
match token.symbol() {
Symbol::DoubleQuote => {
tokens.next();
string.push('"');
break 'inner;
}
Symbol::Whitespace(_) => continue,
Symbol::Escape => {
if tokens.peek_nth(1).unwrap().symbol()
== &Symbol::Word(String::from("n"))
{
tokens.next();
tokens.next();
string.push('\n');
loop {
if let Some(token) = tokens.peek() {
match token.symbol() {
Symbol::Whitespace(_) => {
tokens.next();
continue;
}
Symbol::DoubleQuote => {
tokens.next();
break 'inner;
}
_ => break 'outer,
}
}
return Err(Error::UnexpectedEOF {
token: Box::new(from.clone()),
});
}
}
break;
}
_ => break 'outer,
}
}
break 'outer;
},
_ => {
string.push_str(&tokens.next().unwrap().to_string());
}
}
} else {
return Err(Error::UnexpectedEOF {
token: Box::new(from.clone()),
});
}
}
Ok(Self(string))
}
}
impl Rapify for Str {
fn rapify<O: std::io::Write>(
&self,
output: &mut O,
_offset: usize,
) -> Result<usize, std::io::Error> {
output.write_cstring(&self.0)?;
Ok(self.0.len() + 1)
}
fn rapified_length(&self) -> usize {
self.0.len() + 1
}
fn rapified_code(&self) -> Option<u8> {
Some(0)
}
}
#[cfg(test)]
mod tests {
use hemtt_tokens::Token;
use peekmore::PeekMore;
use crate::model::Parse;
#[test]
fn string() {
let mut tokens = hemtt_preprocessor::preprocess_string(r#""test""#)
.unwrap()
.into_iter()
.peekmore();
let string = super::Str::parse(
&crate::Options::default(),
&mut tokens,
&Token::builtin(None),
)
.unwrap();
assert_eq!(string, super::Str("test".to_string()));
}
#[test]
fn string_escape() {
let mut tokens = hemtt_preprocessor::preprocess_string(r#""test is ""cool""""#)
.unwrap()
.into_iter()
.peekmore();
let string = super::Str::parse(
&crate::Options::default(),
&mut tokens,
&Token::builtin(None),
)
.unwrap();
assert_eq!(string, super::Str(r#"test is "cool""#.to_string()));
}
#[test]
// fn who_in_the_f_thought_this_was_a_good_idea() {
fn multiline_string() {
let mut tokens = hemtt_preprocessor::preprocess_string(r#""test" \n "is" \n "cool""#)
.unwrap()
.into_iter()
.peekmore();
let string = super::Str::parse(
&crate::Options::default(),
&mut tokens,
&Token::builtin(None),
)
.unwrap();
assert_eq!(string, super::Str("test\nis\ncool".to_string()));
}
}