Util: Properly detect empty Tokens and multiple root elements

src/util/json/parser.cpp

@@ -36,17 +36,18 @@ Value Parser::parse()
 {
 	Value result;
 
-	Token token;
-	while (m_index < m_tokens->size()) {
-		token = peek();
+	if (m_tokens->size() == 0) {
+		m_job->printErrorLine({}, "expecting token, not 'EOF'");
+		return result;
+	}
 
+	Token token = peek();
 	switch (token.type) {
 	case Token::Type::Literal:
 		result = getLiteral();
 		break;
 	case Token::Type::Number:
 		result = getNumber();
-			m_index++;
 		break;
 	case Token::Type::String:
 		result = getString();
@@ -70,6 +71,9 @@ Value Parser::parse()
 		m_index++;
 		break;
 	}
+
+	if (m_index < m_tokens->size()) {
+		m_job->printErrorLine(peek(), "multiple root elements");
 	}
 
 	return result;