Minimal parser that actually does something

src/schala_lang/autoparser.rs

@@ -5,6 +5,8 @@ use schala_lang::{tokenizing, parsing};
 use self::tokenizing::*;
 use self::parsing::*;
 
+use schala_lang::tokenizing::TokenType::*;
+
 struct AutoParser {
   tokens: Vec<Token>,
 }
@@ -32,11 +34,27 @@ impl AutoParser {
     self.tokens.pop().map(|t| { t.token_type }).unwrap_or(TokenType::EOF)
   }
   fn parse(&mut self) -> (Result<AST, ParseError>, Vec<String>) {
-    let err = ParseError { msg: format!("Not yet implemented") };
+    let ast = self.program();
-    (Err(err), vec![])
+    (ast, vec![])
   }
 }
 
+impl AutoParser {
+  fn program(&mut self) -> ParseResult<AST> {
+    let etype = self.literal()?;
+    Ok(AST(vec![Statement::ExpressionStatement(Expression(etype, None))]))
+  }
+
+  fn literal(&mut self) -> ParseResult<ExpressionType> {
+    Ok(match self.next() {
+      Keyword(Kw::True) => ExpressionType::BoolLiteral(true),
+      Keyword(Kw::False) => ExpressionType::BoolLiteral(false),
+      _ => return ParseError::new("bad!")
+    })
+  }
+}
+
+
 pub struct Schala { }
 
 impl Schala {

src/schala_lang/parsing.rs

@@ -101,7 +101,7 @@ pub struct ParseError {
 }
 
 impl ParseError {
-  fn new<T>(msg: &str) -> ParseResult<T> {
+  pub fn new<T>(msg: &str) -> ParseResult<T> {
     Err(ParseError { msg: msg.to_string() })
   }
 }