feat: initial commit

include/parser.hpp

@@ -0,0 +1,31 @@
+#ifndef PARSER_HPP
+#define PARSER_HPP
+
+#include <vector>
+#include <unordered_map>
+
+#include "token.hpp"
+#include "ast.hpp"
+
+class Parser {
+    std::vector<Token> tokens;
+    size_t position;
+    bool error_flag;
+    std::unordered_map<std::string, std::unique_ptr<Expr>> defs;
+
+public:
+    Parser(std::vector<Token>);
+    const std::unordered_map<std::string, std::unique_ptr<Expr>>& definitions() const;
+    const Token& peek() const;
+    const Token& get();
+    bool accept(TokenType t);
+    void expect(TokenType t);
+    bool tryParseDefinition();
+    std::unique_ptr<Expr> parseSimple();
+    std::unique_ptr<Expr> parseApplication();
+    std::unique_ptr<Expr> parseTerm();
+    std::unique_ptr<Expr> parse();
+    std::vector<std::unique_ptr<Expr>> parseProgram();
+};
+
+#endif // PARSER_HPP