Add first working pipeline of parse -> ast -> instr -> render

Signed-off-by: Marcel Müller <neikos@neikos.email>

src/parser/mod.rs

@@ -285,6 +285,14 @@ impl<'input> TemplateToken<'input> {
             source,
         }
     }
+
+    pub fn kind(&self) -> TokenKind {
+        self.kind
+    }
+
+    pub fn source(&self) -> &'input str {
+        self.source
+    }
 }
 
 pub fn parse(input: &str) -> Result<ParsedTemplate<'_>, ParseFailure> {
@@ -321,6 +329,7 @@ fn parse_interpolate<'input>(
 ) -> PResult<'input, Vec<TemplateToken<'input>>> {
     let prev_whitespace = opt(parse_whitespace).parse_next(input)?;
     let left_delim = "{{".map(TemplateToken::left_delim).parse_next(input)?;
+    let wants_output = opt("=".map(TemplateToken::wants_output)).parse_next(input)?;
 
     let get_tokens = repeat_till(1.., parse_interpolate_token, peek("}}"));
     let recover = take_until(0.., "}}").void();
@@ -337,6 +346,7 @@ fn parse_interpolate<'input>(
     let mut tokens = vec![];
     tokens.extend(prev_whitespace);
     tokens.push(left_delim);
+    tokens.extend(wants_output);
     tokens.extend(inside_tokens);
     tokens.push(right_delim);
     tokens.extend(post_whitespace);