Start of new ANTLR4 based parser.

Very simple tests pass.

tests/pglabtests/tst_newParser.cpp

@@ -0,0 +1,47 @@
+#include <gtest/gtest.h>
+#include <gmock/gmock-matchers.h>
+#include "PrintTo_Qt.h"
+#include "sqlparser/Parser.h"
+
+using namespace testing;
+using namespace sqlast;
+
+
+
+TEST(NewSqlParser, statementList)
+{
+    std::string input_string = "SEleCT 1; Select 2;";
+    Parser parser(input_string);
+    std::unique_ptr<sqlast::StatementList> program = parser.Parse();
+
+    ASSERT_TRUE(program != nullptr);
+    ASSERT_EQ(2, program->Count());
+}
+
+TEST(NewSqlParser, missingSemi)
+{
+    std::string input_string = "1";
+    Parser parser(input_string);
+    std::unique_ptr<sqlast::StatementList> program = parser.Parse();
+
+    ASSERT_EQ(1, parser.errorCount());
+}
+
+TEST(NewSqlParser, selectList)
+{
+    std::string input_string = "SEleCT 1, 'Tekst'";
+    Parser parser(input_string);
+    std::unique_ptr<sqlast::StatementList> program = parser.Parse();
+
+    ASSERT_TRUE(program != nullptr);
+    ASSERT_EQ(1, program->Count());
+
+    SelectStatement &s = dynamic_cast<SelectStatement&>(program->Get(0));
+    SelectList* sl = s.GetSelectList();
+    ASSERT_TRUE(sl != nullptr);
+    ASSERT_EQ(2, sl->Count());
+
+    SelectItem& si = sl->Get(1);
+    StringLiteral& string_literal = dynamic_cast<StringLiteral&>(si.GetExpression());
+    ASSERT_EQ("Tekst", string_literal.GetValue());
+}