Tokens finished

src/main.rs

@@ -4,20 +4,39 @@
 // Implicit tag
 // h1 a#id."a b c" href="/" {"foo"};
 
-type Offset = usize;
-type Parse<'a> = (&'a str, &'a str, Offset);
-type MaybeParse<'a> = Option<Parse<'a>>;
+mod lex;
 
-fn parse_until(i: &str, condition: impl Fn(char) -> bool) -> Parse {
+type Offset = usize;
+type Parse<'a, T> = (T, &'a str, Offset);
+type MaybeParse<'a, T> = Option<Parse<'a, T>>;
+
+#[derive(Debug, Clone)]
+struct Tag<'a> {
+  name: &'a str,
+  id: &'a str,
+  classes: &'a str
+}
+
+impl Tag<'_> {
+  fn write_open(&self, out: &mut String) {
+    out.push_str(&format!("<{} id={} class={}>", self.name, self.id, self.classes));
+  }
+
+  fn write_close(&self, out: &mut String) {
+    out.push_str(&format!("</{}>", self.name));
+  }
+}
+
+fn parse_until(i: &str, condition: impl Fn(char) -> bool) -> Parse<&str> {
   i.chars()
     .position(condition)
     .map(|pos| (&i[..pos], &i[pos..], pos))
     .unwrap_or((&i, "", i.len()))
 }
 
-fn parse_ws(i: &str) -> Parse { parse_until(i, |c| !c.is_whitespace()) }
+fn parse_ws(i: &str) -> Parse<&str> { parse_until(i, |c| !c.is_whitespace()) }
 
-fn parse_char(i: &str, matches: char) -> MaybeParse {
+fn parse_char(i: &str, matches: char) -> MaybeParse<&str> {
   if let Some(c) = i.chars().next() {
     if c == matches {
       return Some((&i[0..1], &i[1..], 1));
@@ -26,7 +45,7 @@ fn parse_char(i: &str, matches: char) -> MaybeParse {
   None
 }
 
-fn not_empty(parse: Parse) -> MaybeParse {
+fn not_empty<'a>(parse: Parse<'a, &'a str>) -> MaybeParse<&'a str> {
   if !parse.0.is_empty() {
     Some(parse)
   } else {
@@ -34,7 +53,7 @@ fn not_empty(parse: Parse) -> MaybeParse {
   }
 }
 
-fn parse_string(i: &str) -> MaybeParse {
+fn parse_string(i: &str) -> MaybeParse<&str> {
   let mut skip = false;
   let (_, i, o1) = parse_char(i, '"')?;
   let mut o2 = 0;
@@ -45,20 +64,21 @@ fn parse_string(i: &str) -> MaybeParse {
       skip = true;
     } else if c == '"' {
       let off = o1 + o2 - 1;
-      return Some((&i[..off], &i[off..], off));
+      return Some((&i[..off], &i[off+1..], off+2));
     }
     o2 += 1;
   }
   None
 }
 
-fn parse_name(i: &str) -> MaybeParse {
-  let (name, i, o1) = not_empty(parse_until(i, |c| c.is_whitespace()))?;
+
+fn parse_name(i: &str) -> MaybeParse<&str> {
+  let (name, i, o1) = not_empty(parse_until(i, |c| !(c != '_') || !(c != '-') || !c.is_alphabetic()))?;
   let (_, i, o2) = parse_ws(i);
   Some((name, i, o1 + o2))
 }
 
-fn parse_id(i: &str) -> MaybeParse {
+fn parse_id(i: &str) -> MaybeParse<&str> {
   let (_, i, o1) = parse_char(i, '#')?;
   let (_, i, o2) = parse_ws(i);
   let (id, i, o3) = parse_name(i)?;
@@ -66,7 +86,7 @@ fn parse_id(i: &str) -> MaybeParse {
   Some((id, i, o1 + o2 + o3 + o4))
 }
 
-fn parse_classes(i: &str) -> MaybeParse {
+fn parse_classes(i: &str) -> MaybeParse<&str> {
   let (_, i, o1) = parse_char(i, '.')?;
   let (_, i, o2) = parse_ws(i);
   let (classes, i, o3) = parse_string(i)?;
@@ -74,21 +94,33 @@ fn parse_classes(i: &str) -> MaybeParse {
   Some((classes, i, o1 + o2 + o3 + o4))
 }
 
-fn parse_tag(i: &str) -> Option<()> {
-  let (name, i, o1) = parse_name(i)?;
-  let (id, i, o2) = parse_id(i).unwrap_or(("", i, 0));
-  let (classes, i, o3) = parse_classes(i).unwrap_or(("", i, 0));
-  Some(())
+enum TokenType {
+  String,
+  Name,
+  Id,
+  Classes,
+  Equals,
+  Close
 }
 
-fn parse(i: &str) {
-  let mut explicit_stack: Vec<&str> = vec![];
-  let mut inline_stack: Vec<&str> = vec![];
-  let mut out = String::new();
-  let mut off = 0;
+struct Token<'a> {
+  tty: TokenType,
+  slice: &'a str,
+  offset: usize
 }
 
+fn tokenize(i: &str) -> Vec<Token> {
+  let mut tokens = vec![];
+  let mut off = 0;
+  while !i.is_empty() {
+     
+  }
+  tokens
+}
+
+
 fn main() {
-  let p = parse_classes(".\"a b c\"");
-  println!("{:?}", p);
+  let (_, i, o1) = parse_string("\"asdf\"\"asdf\"").unwrap();
+  let (_, i, o2) = parse_string(i).unwrap();
+  println!("{i} {:?}", o1+o2);
 }