[parser] Fill out ProgramParser

parser/src/program_parser.rs

@@ -2,9 +2,10 @@
  * Eryn Wells <eryn@erynwells.me>
  */
 
-use std::fmt::Debug;
 use sibillexer::{Lex, Token};
+use list_parser::ListParser;
 use node_parser::{NodeParser, NodeParseResult};
+use sym_parser::SymParser;
 
 #[derive(Debug)]
 pub struct ProgramParser;
@@ -17,7 +18,22 @@ impl ProgramParser {
 
 impl NodeParser for ProgramParser {
     fn parse(&mut self, lex: Lex) -> NodeParseResult {
-        NodeParseResult::Error { msg: "womp".to_string() }
+        match lex.token() {
+            Token::LeftParen => {
+                let parser = ListParser::new();
+                let parser = Box::new(parser);
+                NodeParseResult::Push { next: parser }
+            },
+            Token::RightParen => {
+                let msg = format!("Expected symbol found {:?}", lex);
+                NodeParseResult::error(msg)
+            },
+            Token::Id => {
+                let parser = SymParser{};
+                let parser = Box::new(parser);
+                NodeParseResult::Push { next: parser }
+            }
+        }
     }
 }