Some work on parser, not used yet.

core/SqlParser.cpp

@@ -33,7 +33,7 @@ SqlParser::SqlParser(SqlLexer &lexer)
 
 }
 
-void SqlParser::parse()
+std::shared_ptr<SqlAst::Node> SqlParser::parse()
 {
 	// Basic algo:
 	// LOOP
@@ -41,6 +41,7 @@ void SqlParser::parse()
 	//   IF NOT try_reduce(token)
 	//   THEN SHIFT
 	// END LOOP
+	std::shared_ptr<SqlAst::Node> result;
 	while (true) {
 		SqlToken token = lexer.nextBasicToken();
 		if (token.ok) {
@@ -57,10 +58,14 @@ void SqlParser::parse()
 					break;
 				}
 			}
+			else if (token.tokenType == BasicTokenType::End) {
+				// Are we at the top level?
+				return result;
+			}
 		}
 		else {
 			// error during lexical analysis, need to recover
-
+			throw std::runtime_error("Unrecognized input");
 		}
 	}
 }