parser

src/parser/mod.rs

@@ -0,0 +1,47 @@
+use crate::{
+    ast,
+    lexer::{self, LexerTraits},
+    token,
+};
+
+pub struct Parser {
+    lexer: lexer::Lexer,
+    cur_token: token::Token,
+    peek_token: token::Token,
+}
+
+trait PaserTrait {
+    fn next_token(&mut self);
+    fn parse_program(&self) -> ast::Program;
+}
+
+pub fn new(l: lexer::Lexer) -> Parser {
+    let mut p: Parser = Parser {
+        lexer: l,
+        cur_token: token::Token {
+            literal: String::new(),
+            type_: String::new(),
+        },
+        peek_token: token::Token {
+            literal: String::new(),
+            type_: String::new(),
+        },
+    };
+    p.next_token();
+    p.next_token();
+    p
+}
+
+impl PaserTrait for Parser {
+    fn next_token(&mut self) {
+        self.cur_token = token::Token {
+            literal: String::from(&self.peek_token.literal),
+            type_: String::from(&self.peek_token.type_),
+        };
+        self.peek_token = self.lexer.next_token();
+    }
+
+    fn parse_program(&self) -> ast::Program {
+        todo!()
+    }
+}