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use crate::Result;
mod lexer;
mod preprocessor;
mod tokens;
#[derive(Debug)]
pub enum Node<'s> {
Code(&'s str),
Text(&'s str),
Element(Element<'s>),
}
impl<'s> Node<'s> {
pub fn to_table<W: std::io::Write>(&self, f: &mut W) -> Result<()> {
match &self {
Node::Code(s) => write!(f, "{}", s)?,
Node::Text(s) => write!(f, "\"{}\"", s)?,
Node::Element(element) => {
write!(f, "{{")?;
write!(f, "tag=\"{}\", ", element.tag)?;
for attribute in &element.attributes {
match &attribute.value {
Value::Literal(s) => write!(f, "{}=\"{}\", ", attribute.key, s)?,
Value::Expression(s) => write!(f, "{}={}, ", attribute.key, s)?,
}
}
write!(f, "children={{")?;
for child in &element.children {
child.to_table(f)?;
}
write!(f, "}}")?;
write!(f, "}}")?;
}
}
Ok(())
}
}
#[derive(Debug)]
pub struct Element<'s> {
pub tag: &'s str,
pub attributes: Vec<Attribute<'s>>,
pub children: Vec<Node<'s>>,
}
#[derive(Debug)]
pub struct Attribute<'s> {
pub key: &'s str,
pub value: Value<'s>,
}
#[derive(Debug)]
pub enum Value<'s> {
Literal(&'s str),
Expression(&'s str),
}
#[derive(Debug)]
pub struct Template<'s> {
pub root: Node<'s>,
}
impl<'s> Template<'s> {
pub fn to_table<W: std::io::Write>(&self, f: &mut W) -> Result<()> {
self.root.to_table(f)
}
}
pub fn preprocess(s: &str) -> Result<String> {
let mut buf = Vec::new();
let preprocessor = preprocessor::Preprocessor::new(s, &mut buf)?;
preprocessor.preprocess()?;
let s = String::from_utf8(buf).unwrap();
Ok(s)
}
pub fn preprocess_dir(path: &std::path::Path) -> Result<()> {
for entry in std::fs::read_dir(path)? {
let entry = entry?;
let path = entry.path();
if path.is_dir() {
preprocess_dir(&path)?;
} else {
if path.extension().unwrap_or_default() != "luax" {
continue;
}
let s = std::fs::read_to_string(&path)?;
let s = preprocess(&s)?;
let out_path = path.with_extension("lua");
std::fs::write(out_path, s)?;
}
}
Ok(())
}
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