another ugly basic implementation

lexer.h

@@ -40,6 +40,7 @@ enum class TokenType {
 	close_paren,
 	logical_and,
 	logical_or,
+	pipe,
 	semicolon,
 	comma,
 	newline,
@@ -61,7 +62,8 @@ public:
 
 	void debugTokens();
 
-	Token currentToken();
+    Token currentToken();
+	Token consumeCurrentToken();
 
 	void nextToken();
 
@@ -72,7 +74,8 @@ public:
 	TokenType nextTokenType();
 	TokenType prevTokenType();
 
-	static bool isRelationalOperator(TokenType token_type);
+    static bool isRelationalOperator(TokenType token_type);
+	static bool isLogicalOperator(TokenType token_type);
 
 private:
 	TokenType type(const std::string &token);