basic skeletons of update and delete added

lexer.cpp

@@ -13,7 +13,7 @@ void Lexer::parse(const std::string &code) {
 	// TODO handle empty code
 	m_tokens.clear();
 
-	// PERF something like this to prealocate ??
+	// PERF something like this to preallocate ??
 	if (code.size() > 100) {
 		m_tokens.reserve(code.size() / 10);
 	}
@@ -36,7 +36,8 @@ void Lexer::parse(const std::string &code) {
 		if (token_type == TokenType::string_literal)
 		    match_str = stringLiteral(match_str);
 
-		m_tokens.push_back(Token{match_str, token_type});
+		if (token_type != TokenType::newline)
+		    m_tokens.push_back(Token{match_str, token_type});
 	}
 
 	// DEBUG IT
@@ -92,6 +93,14 @@ bool Lexer::isRelationalOperator(TokenType token_type) {
 		token_type == TokenType::lesser || token_type == TokenType::lesser_equal);
 }
 
+bool Lexer::isLogicalOperator(TokenType token_type) {
+    return (token_type == TokenType::logical_and || token_type == TokenType::logical_or);
+}
+
+bool Lexer::isArithmeticalOperator(TokenType token_type) {
+    return (token_type == TokenType::plus || token_type == TokenType::minus || token_type == TokenType::multiply || token_type == TokenType::divide);
+}
+
 TokenType Lexer::type(const std::string &token) {
 	// TODO move it to class level not to reinit it again and again
 	std::regex int_regex("[0-9]+");
@@ -145,8 +154,11 @@ TokenType Lexer::type(const std::string &token) {
 	if (token == "where")
 		return TokenType::keyword_where;
 
-	if (token == "from")
-		return TokenType::keyword_from;
+    if (token == "from")
+        return TokenType::keyword_from;
+
+    if (token == "delete")
+		return TokenType::keyword_delete;
 
 	if (token == "table")
 		return TokenType::keyword_table;
@@ -166,8 +178,11 @@ TokenType Lexer::type(const std::string &token) {
 	if (token == "set")
 		return TokenType::keyword_set;
 
-	if (token == "copy")
-		return TokenType::keyword_copy;
+    if (token == "copy")
+        return TokenType::keyword_copy;
+
+    if (token == "update")
+		return TokenType::keyword_update;
 
 	if (token == "not")
 		return TokenType::keyword_not;